NIOSH POCKET GUIDE TO CHEMICAL HAZARDS

DEPARTMENT OF HEALTH AND HUMAN SERVICES

Centers for Disease Control and Prevention 

National Institute for Occupational Safety and Health 

September 2007

DHHS (NIOSH) Publication No. 2005-149 

 First Printing – September 2005 

 Second Printing – August 2006, with minor technical changes 

 Third Printing – September 2007, with minor technical changes

i
ii

DISCLAIMER 

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Web sites external to NIOSH do not constitute NIOSH endorsement of the sponsoring 

organizations or their programs or products. Furthermore, NIOSH is not responsible for the 

content of these Web sites. 

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SAFER • HEALTHIER • PEOPLETM 
iii

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COMMENTS & SUGGESTIONS 

We encourage and welcome any comments, suggestions, or corrections that you may have 

regarding the Pocket Guide. You can use the Reader Response Card included with the 

Pocket Guide, or you can contact us via e-mail or telephone. Thank you for your comments 

and suggestions. 

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iv

PREFACE

The NIOSH Pocket Guide to Chemical Hazards presents information taken from the 

NIOSH/OSHA Occupational Health Guidelines for Chemical Hazards, from National 

Institute for Occupational Safety and Health (NIOSH) criteria documents and Current 

Intelligence Bulletins, and from recognized references in the fields of industrial hygiene, 

occupational medicine, toxicology, and analytical chemistry. The information is presented 

in tabular form to provide a quick, convenient source of information on general industrial 

hygiene practices. The information in the Pocket Guide includes chemical structures or 

formulas, identification codes, synonyms, exposure limits, chemical and physical 

properties, incompatibilities and reactivities, measurement methods, respirator selections, 

signs and symptoms of exposure, and procedures for emergency treatment. 

The information assembled in the original 1978 printing of the Pocket Guide was the result 

of the Standards Completion Program, a joint effort by NIOSH and the Department of 

Labor to develop supplemental requirements for the approximately 380 workplace 

environmental exposure standards adopted by the Occupational Safety and Health 

Administration (OSHA) in 1971. 

Listed below are changes that were made for this edition (2005-149) of the Pocket Guide: 

• New layout for the Chemical Listing section. 

• Recommendations for particulate respirators have been revised to incorporate 

“Part 84” terminology. See “Recommendations for Respirator Selection” on page 

xiv for a more thorough explanation of these changes. 

• The Synonym and Trade Name Index has been expanded. This index is now 

called the Chemical, Synonym, and Trade Name Index (page 383). 

• Some ID and Guide Numbers were changed to reflect changes made in the 2004 

Emergency Response Guidebook (http://hazmat.dot.gov/pubs/erg/gydebook.htm). 

• Appendix E (page 351) has been revised. It now contains OSHA respirator 

requirements for 28 chemicals or hazardous substances that were identified in the 

preamble to the OSHA Respiratory Protection Standard (29 CFR 1910.134). 

• Other minor technical changes have also been made since the February 2004 

edition. (For the most current information and updates, consult the electronic 

version on the NIOSH Web site: http://www.cdc.gov/niosh/npg/npg.html.) 

Listed below are changes made for the 3rd printing of this edition of the Pocket Guide: 

• Changes were made to reflect the new OSHA PEL for hexavalent chromium. 

• The NIOSH REL for coal mine dust was added to the coal dust entry. 

• A few other minor technical changes have been made. 
v

CONTENTS

Preface .......................................................................................................................... iv

Acknowledgments ........................................................................................................ vi

Introduction ................................................................................................................... vii

NIOSH Recommendations ........................................................................................... vii

How to Use This Pocket Guide ..................................................................................... viii

Table 1 – NIOSH Manual of Analytical Methods ........................................................ xvii

Table 2 – Personal Protection and Sanitation Codes .................................................... xviii

Table 3 – Symbols, Code Components, and Codes Used for Respirator Selection ..... xx

Table 4 – Selection of N-, R-, or P-Series Particulate Respirators ............................... xxv

Table 5 – Abbreviations for Exposure Routes, Symptoms, and Target Organs ........... xxvi

Table 6 – Codes for First Aid Data ............................................................................... xxviii

Chemical Listing ........................................................................................................... 1

Appendices .................................................................................................................... 341

Appendix A – NIOSH Potential Occupational Carcinogens ........................................ 342

Appendix B – Thirteen OSHA-Regulated Carcinogens ............................................... 344

Appendix C – Supplementary Exposure Limits ........................................................... 345

Appendix D – Substances with No Established RELs ................................................. 350

Appendix E – OSHA Respirator Requirements for Selected Chemicals ..................... 351

Appendix F – Miscellaneous Notes .............................................................................. 361

Appendix G – Vacated 1989 OSHA PELs ................................................................... 362

Indices ........................................................................................................................... 373

CAS Number Index ...................................................................................................... 374

DOT ID Number Index ................................................................................................. 379

Chemical, Synonym, and Trade Name Index .............................................................. 383
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ACKNOWLEDGMENTS

The Education and Information Division (EID), National Institute for Occupational 

Safety and Health (NIOSH), has primary responsibility for the development of the Pocket 

Guide. There have been many people who have contributed to the preparation and 

development of this document since it was first published in 1978. I would like to express 

my appreciation to the following people within EID for their efforts: Vern Anderson for 

general guidance; Guss Hasbani (Constella Group, Inc.) for computer programming and 

database development that has been vital to the production of this new edition; 

Heinz Ahlers, Barb Dames, Charles Geraci, Richard Niemeier, David Votaw, 

Alan Weinrich, and Ralph Zumwalde for policy review; David Case, Laura Delaney, and 

Rolland Rogers for reformatting and computerization; Vanessa Becks, Anne Hamilton, and 

Rodger Tatken for editorial review; Clayton Doak, Eileen Kuempel, Leela Murthy, Henryka 

Nagy, John Palassis, Faye Rice, and David Votaw for assistance in updating and adding 

information; Lawrence Foster, Vicki Reuss, Lucy Schoolfield, and Ronald Schuler for data 

acquisition; Kent Hatfield for consultation on toxicology issues; Charlene Maloney for 

publication dissemination and general guidance; and Oliver F. Cobb and Associates (Carla 

Brooks, George Brown, Sherri Diana, and Jesse Romans) for answering requests and 

mailing thousands of copies of the Pocket Guide. 

 The following people, who constitute the Pocket Guide Editorial Board, have 

contributed greatly by providing guidance and review of the content and style of this 

new edition: Steven Ahrenholz (Division of Surveillance, Hazard Evaluations and Field 

Studies, DSHEFS), Roland BerryAnn (National Personal Protective Technology 

Laboratory, NPPTL), Joseph Bowman (Division of Applied Research and Technology, 

DART), Pamela Drake (Spokane Research Laboratory, SRL), Gerald Joy (Pittsburgh 

Research Laboratory, PRL), Alan Lunsford (DART), Nancy Nilsen (DSHEFS), 

Paula Fey O’Connor (DART), Carl Ornot (Office of Administrative and Management 

Services, OAMS), Jay Snyder (NPPTL), Sidney Soderholm (Health Effects Laboratory 

Division, HELD), David Sylvain (DSHEFS), Ainsley Weston (HELD), and 

Anthony Zimmer (DART). 

 In addition, the following people also have contributed greatly to the Pocket Guide: 

Mary Ellen Cassinelli (DART), Donald Dollberg (DART), and Paula Fey O’Connor 

(DART) for the development of the measurement methods section; Roland BerryAnn 

(NPPTL), Nancy Bollinger (HELD), Christopher Coffey (Division of Respiratory Disease 

Studies, DRDS) for the development of respirator recommendations; Laurence Reed 

(DART) and John Whalen (DART) for policy review; Crystal Ellison (Office of 

Compensation Analysis and Support, OCAS) for assistance in updating and adding 

information; and Henry Chan and Howard Ludwig (former Pocket Guide Technical Editors) 

for general guidance. 

 Also, thanks are due to all of the people who have reviewed and commented on the 

Pocket Guide during its initial development and subsequent revisions. 

Michael E. Barsan 

(Technical Editor) 
vii

INTRODUCTION

The NIOSH Pocket Guide to Chemical Hazards provides a concise source of general 

industrial hygiene information for workers, employers, and occupational health 

professionals. The Pocket Guide presents key information and data in abbreviated tabular 

form for 677 chemicals or substance groupings commonly found in the work environment 

(e.g., manganese compounds, tellurium compounds, inorganic tin compounds, etc.). The 

industrial hygiene information found in the Pocket Guide assists users to recognize and 

control occupational chemical hazards. The chemicals or substances contained in this 

revision include all substances for which the National Institute for Occupational Safety and 

Health (NIOSH) has recommended exposure limits (RELs) and those with permissible 

exposure limits (PELs) as found in the Occupational Safety and Health Administration 

(OSHA) Occupational Safety and Health Standards (29 CFR 1910.1000 – 1052). 

Background

In 1974, NIOSH (which is responsible for recommending health and safety standards) 

joined OSHA (whose jurisdictions include promulgation and enforcement activities) in 

developing a series of occupational health standards for substances with existing PELs. 

This joint effort was labeled the Standards Completion Program and involved the 

cooperative efforts of several contractors and personnel from various divisions within 

NIOSH and OSHA. The Standards Completion Program developed 380 substance-specific 

draft standards with supporting documentation that contained technical information and 

recommendations needed for the promulgation of new occupational health regulations. The 

Pocket Guide was developed to make the technical information in those draft standards 

more conveniently available to workers, employers, and occupational health professionals. 

The Pocket Guide is updated periodically to reflect new data regarding the toxicity of 

various substances and any changes in exposure standards or recommendations. (For the 

most current information and updates, consult the electronic version on the NIOSH Web 

site: http://www.cdc.gov/niosh/npg/npg.html.) 

Data Collection and Application

The data collected for this revision were derived from a variety of sources, including 

NIOSH policy documents such as Criteria Documents and Current Intelligence Bulletins 

(CIBs), and recognized references in the fields of industrial hygiene, occupational medicine, 

toxicology, and analytical chemistry. 

NIOSH RECOMMENDATIONS

 

Acting under the authority of the Occupational Safety and Health Act of 1970 (29 USC 

Chapter 15) and the Federal Mine Safety and Health Act of 1977 (30 USC Chapter 22), 

NIOSH develops and periodically revises recommended exposure limits (RELs) for 

hazardous substances or conditions in the workplace. NIOSH also recommends appropriate 

preventive measures to reduce or eliminate the adverse health and safety effects of these 
viii

hazards. To formulate these recommendations, NIOSH evaluates all known and available 

medical, biological, engineering, chemical, trade, and other information relevant to the 

hazard. These recommendations are then published and transmitted to OSHA and the Mine 

Safety and Health Administration (MSHA) for use in promulgating legal standards. 

NIOSH recommendations are published in a variety of documents. Criteria documents 

recommend workplace exposure limits and appropriate preventive measures to reduce or 

eliminate adverse health effects and accidental injuries. 

Current Intelligence Bulletins (CIBs) are issued to disseminate new scientific information 

about occupational hazards. A CIB may draw attention to a formerly unrecognized hazard, 

report new data on a known hazard, or present information on hazard control. 

Alerts, Special Hazard Reviews, Occupational Hazard Assessments, and Technical 

Guidelines support and complement the other standard development activities of the 

Institute. Their purpose is to assess the safety and health problems associated with a given 

agent or hazard (e.g., the potential for injury or for carcinogenic, mutagenic, or teratogenic 

effects) and to recommend appropriate control and surveillance methods. Although these 

documents are not intended to supplant the more comprehensive criteria documents, they 

are prepared in order to assist OSHA and MSHA in the formulation of regulations. 

In addition to these publications, NIOSH periodically presents testimony before various 

Congressional committees and at OSHA and MSHA rulemaking hearings. 

Recommendations made through 1992 are available in a single compendium entitled 

NIOSH Recommendations for Occupational Safety and Health: Compendium of Policy 

Documents and Statements [DHHS (NIOSH) Publication No. 92-100] 

(http://www.cdc.gov/niosh/92-100.html). More recent recommendations are available on 

the NIOSH Web site (http://www.cdc.gov/niosh). Copies of the Compendium may be 

ordered from the NIOSH Publications office (800-356-4674). 

HOW TO USE THIS POCKET GUIDE

The Pocket Guide has been designed to provide chemical-specific data to supplement 

general industrial hygiene knowledge. Individual tables for each chemical present this data 

in the Chemical Listing section (page 1). To maximize the amount of data provided in the 

limited space in these tables, abbreviations and codes have been used extensively. These 

abbreviations and codes, which have been designed to permit rapid comprehension by the 

regular user, are discussed for each field in these chemical tables in the following 

subsections. 

Chemical Name

The chemical name found in the OSHA General Industry Air Contaminants Standard (29 

CFR 1910.1000) is listed in the blue box in the top left portion of each chemical table. This 

name is referred to as the “primary name” in the Chemical, Synonym, and Trade Name 

Index (page 383). 
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Structure/Formula

The chemical structure or formula is listed in the field to the right of the chemical name in 

each chemical table. Carbon-carbon double bonds (-C=C-) and carbon-carbon triple bonds 

(-C≡C-) have been indicated where applicable. 

CAS Number

This section lists the Chemical Abstracts Service (CAS) registry number. The CAS 

number, in the format xxx-xx-x, is unique for each chemical and allows efficient searching 

on computerized data bases. A page index for all CAS registry numbers listed is included 

at the back of the Pocket Guide (page 374) to help the user locate a specific substance. 

RTECS Number

This section lists the NIOSH Registry of Toxic Effects of Chemical Substances (RTECS®) 

number, in the format ABxxxxxxx. RTECS® may be useful for obtaining additional 

toxicologic information on a specific substance. 

RTECS® is a compendium of data extracted from the open scientific literature. On 

December 18, 2001, CDC’s Technology Transfer Office, on behalf of NIOSH, successfully 

completed negotiating a “PHS Trademark Licensing Agreement” for RTECS®. This nonexclusive licensing agreement provides for the transfer and continued development of the 

“RTECS® database and its trademark” to MDL Information Systems, Inc. (MDL), a wholly 

owned subsidiary of Elsevier Science, Inc. Under this agreement, MDL will be responsible 

for updating, licensing, marketing, and distributing RTECS®. For more information visit 

the MDL Web site (http://www.mdli.com). 

The RTECS® entries for chemicals listed in the Pocket Guide can be viewed on the NIOSH 

Web site (http://www.cdc.gov/niosh/npg/npg.html) or on the CD-ROM version of the 

Pocket Guide (see page iii for ordering information). 

IDLH

This section lists the immediately dangerous to life or health concentrations (IDLHs). For 

the June 1994 Edition of the Pocket Guide, NIOSH reviewed and in many cases revised the 

IDLH values. The criteria utilized to determine the adequacy of the original IDLH values 

were a combination of those used during the Standards Completion Program and a newer 

methodology developed by NIOSH. These “interim” criteria formed a tiered approach, 

preferentially using acute human toxicity data, followed by acute animal inhalation toxicity 

data, and then by acute animal oral toxicity data to determine a preliminary updated IDLH 

value. When relevant acute toxicity data were insufficient or unavailable, NIOSH also 

considered using chronic toxicity data or an analogy to a chemically similar substance. 

NIOSH then compared these preliminary values with the following criteria to determine the 

updated IDLH value: 10% of lower explosive limit (LEL); acute animal respiratory 

irritation data (RD50); other short-term exposure guidelines; and the NIOSH Respirator 

Selection Logic (DHHS [NIOSH] Publication No. 2005-100; 
x

http://www.cdc.gov/niosh/docs/2005-100). The Documentation for Immediately 

Dangerous to Life or Health Concentrations (NTIS Publication Number PB-94-195047) 

further describes these criteria and provides information sources for both the original and 

revised IDLH values (http://www.cdc.gov/niosh/idlh/idlh-1.html). NIOSH currently is 

assessing the various uses of IDLHs, whether the criteria used to derive the IDLH values 

are valid, and if other information or criteria should be utilized. 

The purpose for establishing an IDLH value in the Standards Completion Program was to 

determine the airborne concentration from which a worker could escape without injury or 

irreversible health effects from an IDLH exposure in the event of the failure of respiratory 

protection equipment. The IDLH was considered a maximum concentration above which 

only a highly reliable breathing apparatus providing maximum worker protection should be 

permitted. In determining IDLH values, NIOSH considered the ability of a worker to 

escape without loss of life or irreversible health effects along with certain transient effects, 

such as severe eye or respiratory irritation, disorientation, and incoordination, which could 

prevent escape. As a safety margin, IDLH values are based on effects that might occur as a 

consequence of a 30-minute exposure. However, the 30-minute period was NOT meant to 

imply that workers should stay in the work environment any longer than necessary; in fact, 

EVERY EFFORT SHOULD BE MADE TO EXIT IMMEDIATELY! 

The NIOSH Respirator Selection Logic defines IDLH exposure conditions as “conditions 

that pose an immediate threat to life or health, or conditions that pose an immediate threat 

of severe exposure to contaminants, such as radioactive materials, which are likely to have 

adverse cumulative or delayed effects on health.” The purpose of establishing an IDLH 

exposure concentration is to ensure that the worker can escape from a given contaminated 

environment in the event of failure of the respiratory protection equipment. The Respirator 

Selection Logic uses IDLH values as one of several respirator selection criteria. Under the 

Respirator Selection Logic, the most protective respirators (e.g., a self-contained breathing 

apparatus equipped with a full facepiece and operated in a pressure-demand or other 

positive-pressure mode) would be selected for firefighting, exposure to carcinogens, entry 

into oxygen-deficient atmospheres, in emergency situations, during entry into an 

atmosphere that contains a substance at a concentration greater than 2,000 times the NIOSH 

REL or OSHA PEL, and for entry into IDLH atmospheres. IDLH values are listed in the 

Pocket Guide for over 380 substances. 

The notation “Ca” appears in the IDLH field for all substances that NIOSH considers 

potential occupational carcinogens. However, IDLH values that were originally determined 

in the Standards Completion Program or were subsequently revised are shown in brackets 

following the “Ca” designations. “10%LEL” indicates that the IDLH was based on 10% 

of the lower explosive limit for safety considerations even though the relevant toxicological 

data indicated that irreversible health effects or impairment of escape existed only at higher 

concentrations. “N.D.” indicates that an IDLH value has not been determined for that 

substance. Appendix F (page 361) contains an explanation of the “Effective” IDLHs used 

for four chloronaphthalene compounds. 
xi

Conversion Factors

This section lists factors for the conversion of ppm (parts of vapor or gas per million parts 

of contaminated air by volume) to mg/m3

 (milligrams of vapor or gas per cubic meter of 

contaminated air) at 25°C and 1 atmosphere for chemicals with exposure limits expressed in 

ppm. 

DOT ID and Guide Number

This section lists the U.S. Department of Transportation (DOT) Identification numbers and 

the corresponding Guide numbers. Their format is xxxx yyy. The Identification (ID) 

number (xxxx) indicates that the chemical is regulated by DOT. The Guide number (yyy) 

refers to actions to be taken to stabilize an emergency situation; this information can be 

found in the 2004 Emergency Response Guidebook (Office of Hazardous Materials 

Initiatives and Training [DHM-50], Research and Special Programs Administration, U.S. 

Department of Transportation, 400 7th Street, S.W., Washington, D.C. 20590-0001; for sale 

by the U.S. Government Printing Office, Superintendent of Documents, P.O. Box 371954, 

Pittsburgh, PA 15250-7954). This information is also available on the CD-ROM and Web 

site versions of the Pocket Guide (http://www.cdc.gov/niosh/npg/npg.html). A page index 

for all DOT ID numbers listed is provided on page 379 to help the user locate a specific 

substance; please note however, that many DOT numbers are not unique for a specific 

substance. 

Synonyms and Trade Names

This section contains an alphabetical list of common synonyms and trade names for each 

chemical. A page index for all chemical names, synonyms, and trade names listed in the 

Pocket Guide is included on page 383. 

Exposure Limits

The NIOSH recommended exposure limits (RELs) are listed first in this section. For 

NIOSH RELs, “TWA” indicates a time-weighted average concentration for up to a 10-hour 

workday during a 40-hour workweek. A short-term exposure limit (STEL) is designated by 

“ST” preceding the value; unless noted otherwise, the STEL is a 15-minute TWA exposure 

that should not be exceeded at any time during a workday. A ceiling REL is designated by 

“C” preceding the value; unless noted otherwise, the ceiling value should not be exceeded 

at any time. Any substance that NIOSH considers to be a potential occupational carcinogen 

is designated by the notation “Ca” (see Appendix A [page 342], which contains a brief 

discussion of potential occupational carcinogens). 

The OSHA permissible exposure limits (PELs), as found in Tables Z-1, Z-2, and Z-3 of the 

OSHA General Industry Air Contaminants Standard (29 CFR 1910.1000), that were 

effective on July 1, 1993* and which are currently enforced by OSHA are listed next. 

*In July 1992, the 11th Circuit Court of Appeals in its decision in 

AFL-CIO v. OSHA, 965 F.2d 962 (11th Cir., 1992) vacated more protective 

PELs set by OSHA in 1989 for 212 substances, moving them back to PELs 
xii

established in 1971. The appeals court also vacated new PELs for 164 

substances that were not previously regulated. Enforcement of the court 

decision began on June 30, 1993. Although OSHA is currently enforcing 

exposure limits in Tables Z-1, Z-2, and Z-3 of 29 CFR 1910.1000 which 

were in effect before 1989, violations of the “general duty clause” as 

contained in Section 5(a) (1) of the Occupational Safety and Health Act 

may be considered when worker exposures exceed the 1989 PELs for the 

164 substances that were not previously regulated. The substances for 

which OSHA PELs were vacated on June 30, 1993 are indicated by the 

symbol “†” following OSHA in this section and previous values (the PELs 

that were vacated) are listed in Appendix G (page 362). 

TWA concentrations for OSHA PELs must not be exceeded during any 8-hour workshift of 

a 40-hour workweek. A STEL is designated by “ST” preceding the value and is measured 

over a 15-minute period unless noted otherwise. OSHA ceiling concentrations (designated 

by “C” preceding the value) must not be exceeded during any part of the workday; if 

instantaneous monitoring is not feasible, the ceiling must be assessed as a 

15-minute TWA exposure. In addition, there are a number of substances from Table Z-2 

(e.g., beryllium, ethylene dibromide) that have PEL ceiling values that must not be 

exceeded except for specified excursions. For example, a “5-minute maximum peak in any 

2 hours” means that a 5-minute exposure above the ceiling value, but never above the 

maximum peak, is allowed in any 2 hours during an 8-hour workday. Appendix B (page 

344) contains a brief discussion of substances regulated as carcinogens by OSHA. 

Concentrations are given in ppm, mg/m3

, mppcf (millions of particles per cubic foot of air 

as determined from counting an impinger sample), or fibers/cm3

 (fibers per cubic 

centimeter). The “[skin]” designation indicates the potential for dermal absorption; skin 

exposure should be prevented as necessary through the use of good work practices, gloves, 

coveralls, goggles, and other appropriate equipment. The “(total)” designation indicates 

that the REL or PEL listed is for "total particulate" versus the “(resp)” designation which 

refers to the “respirable fraction” of the airborne particulate. 

Appendix C (page 345) contains more detailed discussions of the specific exposure limits 

for certain low-molecular-weight aldehydes, asbestos, various dyes (benzidine-, o-tolidine-, 

and o-dianisidine-based), carbon black, chloroethanes, the various chromium compounds 

(chromic acid and chromates, chromium(II) and chromium(III) compounds, and chromium 

metal), coal tar pitch volatiles, coke oven emissions, cotton dust, lead, mineral dusts, 

NIAX® Catalyst ESN, trichloroethylene, and tungsten carbide (cemented). Appendix D 

(page 350) contains a brief discussion of substances included in the Pocket Guide with no 

established RELs at this time. Appendix F (page 361) contains miscellaneous notes 

regarding the OSHA PEL for benzene, and Appendix G (page 362) lists the OSHA PELS 

that were vacated on June 30, 1993. 

Measurement Methods

The section provides a source (NIOSH or OSHA) and the corresponding method number 

for measurement methods which can be used to determine the exposure for the chemical or 
xiii

substance. Unless otherwise noted, the NIOSH methods are from the 4th edition of the 

NIOSH Manual of Analytical Methods (DHHS [NIOSH] Publication 

No. 94-113 [http://www.cdc.gov/niosh/nmam]) and supplements. If a different edition of 

the NIOSH Manual of Analytical Methods is cited, the appropriate edition and, where 

applicable, the volume number are noted [e.g., II-4 (2nd edition, volume 4)]. The OSHA 

methods are from the OSHA Web site (http://www.osha-slc.gov/dts/sltc/methods). “None 

available” means that no method is available from NIOSH or OSHA. Table 1 (page xvii) 

lists the editions, volumes, and supplements of the NIOSH Manual of Analytical Methods. 

Each method listed is the recommended method for the analysis of the compound of 

interest. However, the method may not have been fully optimized to meet the specific 

sampling situation. Note that some methods are only partially evaluated and have been 

used in very limited sampling situations. Review the details of the method and consult with 

the laboratory performing the analysis regarding the applicability of the method and the 

need for further modifications to the method in order to adjust for the particular conditions. 

Physical Description

A brief description of the appearance and odor of each substance is provided in the physical 

description section. Notations are made as to whether a substance can be shipped as a 

liquefied compressed gas or whether it has major use as a pesticide. 

Chemical and Physical Properties

The following abbreviations are used for the chemical and physical properties given for 

each substance. “NA” indicates that a property is not applicable, and a question mark (?) 

indicates that it is unknown. 

 MW................ Molecular weight 

 BP................... Boiling point at 1 atmosphere, °F 

 Sol.................. Solubility in water at 68°F*, % by weight (i.e., g/100 ml) 

 Fl.P................. Flash point (i.e., the temperature at which the liquid phase gives 

 off enough vapor to flash when exposed to an external ignition 

 source), closed cup (unless annotated “(oc)” for open cup), °F 

 IP.................... Ionization potential, eV (electron volts) 

 (Ionization potentials are given as a guideline for the selection of 

 photoionization detector lamps used in some direct-reading 

 instruments.) 

 Sp.Gr.............. Specific gravity at 68°F* referenced to water at 39.2°F (4°C) 

 RGasD........... Relative density of gases referenced to air = 1 (indicates how many 

 times a gas is heavier than air at the same temperature) 

 VP.................. Vapor pressure at 68°F*, mm Hg; 

 “approx” indicates approximately 

 FRZ................ Freezing point for liquids and gases, °F 

 MLT............... Melting point for solids, °F 
xiv

 UEL................ Upper explosive (flammable) limit in air, % by volume 

 (at room temperature*) 

 LEL................ Lower explosive (flammable) limit in air, % by volume 

 (at room temperature*) 

 MEC............... Minimum explosive concentration, g/m3 (when available) 

 *If noted after a specific entry, these properties may be reported at other 

 temperatures. 

When available, the flammability/combustibility of a substance is listed at the bottom of the 

chemical and physical properties section. The following OSHA criteria (29 CFR 1910.106) 

were used to classify flammable or combustible liquids: 

Class IA flammable liquid..................... Fl.P below 73°F and BP below 100°F. 

Class IB flammable liquid..................... Fl.P below 73°F and BP at or above 100°F. 

Class IC flammable liquid..................... Fl.P at or above 73°F and below 100°F. 

Class II combustible liquid.................... Fl.P at or above 100°F and below 140°F. 

Class IIIA combustible liquid................ Fl.P at or above 140°F and below 200°F. 

Class IIIB combustible liquid................ Fl.P at or above 200°F. 

Personal Protection and Sanitation

This section presents a summary of recommended practices for each substance. These 

recommendations supplement general work practices (e.g., no eating, drinking, or smoking 

where chemicals are used) and should be followed if additional controls are needed after 

using all feasible process, equipment, and task controls. Table 2 (page xviii) explains the 

codes used. Each category is described as follows: 

SKIN................. Recommends the need for personal protective clothing. 

EYES................ Recommends the need for eye protection. 

WASH SKIN...... Recommends when workers should wash the spilled chemical 

 from the body in addition to normal washing (e.g., before eating). 

REMOVE.............. Advises workers when to remove clothing that has accidentally 

 become wet or significantly contaminated. 

CHANGE............. Recommends whether routine changing of clothing is needed. 

PROVIDE............ Recommends the need for eyewash fountains and/or quick drench 

 facilities. 

Recommendations for Respirator Selection

This section provides a condensed table of allowable respirators to be used for those 

substances for which IDLH values have been determined, or for which NIOSH has 

previously provided respirator recommendations (e.g., in criteria documents or Current 

Intelligence Bulletins) for certain chemicals. There are, however, 186 chemicals listed in 
xv

the Pocket Guide for which IDLH values have yet to be determined. Since the IDLH is a 

critical component for completing the Respirator Selection Logic for a given chemical, the 

Pocket Guide does not provide respiratory recommendations for those 186 chemicals 

without IDLH values. As new or revised IDLH values are developed for those and other 

chemicals, NIOSH will provide appropriate respirator recommendations. (Updated 

information on the Pocket Guide can be found on the NIOSH Web site 

(http://www.cdc.gov/niosh/npg/npg.html) and incorporated into subsequent editions of the 

Pocket Guide. [Appendix F (page 361) contains an explanation of the “Effective” IDLHs 

used for four chloronaphthalene compounds.] 

In 1995, NIOSH developed a new set of regulations in 42 CFR 84 (also referred to as “Part 

84”) for testing and certifying non-powered, air-purifying, particulate-filter respirators. The 

new Part 84 respirators have passed a more demanding certification test than the old 

respirators (e.g., dust; dust and mist; dust, mist, and fume; spray paint; pesticide) certified 

under 30 CFR 11 (also referred to as “Part 11”). Recommendations for non-powered, airpurifying particulate respirators have been updated from previous editions of the Pocket 

Guide to incorporate Part 84 respirators; Part 11 terminology has been removed. See Table 

4 (page xxv) for information concerning the selection of N-, R-, or P-series (Part 84) 

particulate respirators. 

In January 1998, OSHA revised its respiratory protection standard (29 CFR 1910.134). 

Among the provisions in the revised standard is the requirement for an end-of-service-life 

indicator (ESLI) or a change schedule when air-purifying respirators with chemical 

cartridges or canisters are used for protection against gases and vapors 

[29 CFR 1910.134(d)(3)(iii)]. (Note: All respirator codes containing “Ccr” or “Ov” are 

covered by this requirement.) In the Pocket Guide, air-purifying respirators (without 

ESLIs) for protection against gases and vapors are recommended only for chemicals with 

adequate warning properties, but now these respirators may be selected regardless of the 

warning properties. Respirator recommendations in the Pocket Guide have not been revised 

in this edition to reflect the OSHA requirements for ESLIs or change schedules. 

Appendix A (page 342) lists the NIOSH carcinogen policy. Respirator recommendations 

for carcinogens in the Pocket Guide have not been revised to reflect this policy; these 

recommendations will be revised in future editions. 

The first line in the entry indicates whether the “NIOSH” or the “OSHA” exposure limit is 

used on which to base the respirator recommendations. The more protective limit between 

the NIOSH REL or the OSHA PEL is always used. “NIOSH/OSHA” indicates that the 

limits are equivalent. 

Each subsequent line lists a maximum use concentration (MUC) followed by the classes of 

respirators that are acceptable for use up to the MUC. Codes for the various categories of 

respirators, and Assigned Protection Factors (APFs) for these respirators, are listed in Table 

3 (page xx). Individual respirator classes are separated by diagonal lines (/). More 

protective respirators may be worn. The symbol “§” is followed by the classes of 

respirators that are acceptable for emergency or planned entry into unknown concentrations 

or entry into IDLH conditions. “Escape” indicates that the respirators are to be used only 
xvi

for escape purposes. For each MUC or condition, this entry lists only those respirators with 

the required APF and other use restrictions based on the NIOSH Respirator Selection Logic. 

All respirators selected must be approved by NIOSH under the provisions of 42 CFR 84. 

The current listing of NIOSH/MSHA certified respirators can be found in the NIOSH 

Certified Equipment List, which is available on the NIOSH Web site 

(http://www.cdc.gov/niosh/npptl/topics/respirators/cel). 

A complete respiratory protection program must be implemented and must fulfill all 

requirements of 29 CFR 1910.134. A respiratory protection program must include a written 

standard operating procedure covering regular training, fit-testing, fit-checking, periodic 

environmental monitoring, maintenance, medical monitoring, inspection, cleaning, storage 

and periodic program evaluation. Selection of a specific respirator within a given class of 

recommended respirators depends on the particular situation; this choice should be made 

only by a knowledgeable person. REMEMBER: Air-purifying respirators will not protect 

users against oxygen-deficient atmospheres, and they are not to be used in IDLH 

conditions. The only respirators recommended for fire fighting are self-contained breathing 

apparatuses that have full facepieces and are operated in a pressure-demand or other 

positive-pressure mode. Additional information on the selection and use of respirators can 

be found in the NIOSH Respirator Selection Logic (DHHS [NIOSH] Publication No. 

2005-100) and the NIOSH Guide to Industrial Respiratory Protection (DHHS [NIOSH] 

Publication No. 87-116), which are available on the Respirator Topic Page on the NIOSH 

Web site (http://www.cdc.gov/niosh/npptl/topics/respirators). 

Incompatibilities and Reactivities

This section lists important hazardous incompatibilities or reactivities for each substance. 

Exposure Routes, Symptoms, and Target Organs

The first row for each substance in this section lists the toxicologically important entry 

routes (ER) and whether contact with the skin or eyes is potentially hazardous. The second 

row lists the potential symptoms of exposure (SY) and whether NIOSH considers the 

substance a potential occupational carcinogen ([carc]). The third row lists target organs 

(TO) affected by exposure to the substance (for carcinogens, the types of cancer are listed 

in brackets). Information in this section reflects human data unless otherwise noted. 

Abbreviations are defined in Table 5 (page xxvi). 

First Aid

This section lists emergency procedures for eye and skin contact, inhalation, and ingestion 

of the toxic substance. Abbreviations are defined in Table 6 (page xxviii). 
xvii

Table 1 

NIOSH Manual of Analytical Methods

Edition Volume Supplement Publication No. 

2 1 77-157-A 

2 2 77-157-B 

2 3 77-157-C 

2 4 78-175 

2 5 79-141 

2 6 80-125 

2 7 82-100 

3 84-100 

3 1 85-117 

3 2 87-117 

3 3 89-127 

3 4 90-121 

4 94-113 

4 1 96-135 

4 2 98-119 

4 3 2003-154 

See Measurement Methods section on page xii for more information. The NIOSH Manual of 

Analytical Methods is available on the NIOSH Web site (http://www.cdc.gov/niosh/nmam). 
xviii

Table 2 

Personal Protection and Sanitation Codes

Code Definition

Skin: Prevent skin 

contact 

Wear appropriate personal protective clothing to prevent skin 

contact. 

Frostbite 

Compressed gases may create low temperatures when they 

expand rapidly. Leaks and uses that allow rapid expansion may 

cause a frostbite hazard. Wear appropriate personal protective 

clothing to prevent the skin from becoming frozen. 

N.R No recommendation is made specifying the need for personal 

protective equipment for the body. 

Eyes: Prevent eye 

contact Wear appropriate eye protection to prevent eye contact. 

Frostbite Wear appropriate eye protection to prevent eye contact with the 

liquid that could result in burns or tissue damage from frostbite. 

N.R. No recommendation is made specifying the need for eye 

protection. 

Wash 

skin: When contam The worker should immediately wash the skin when it becomes 

contaminated. 

Daily The worker should wash daily at the end of each work shift, and 

prior to eating, drinking, smoking, etc. 

N.R. 

No recommendation is made specifying the need for washing 

the substance from the skin (either immediately or at the end of 

the work shift). 

Remove: When wet or 

contam 

Work clothing that becomes wet or significantly contaminated 

should be removed and replaced. 

When wet 

(flamm) 

Work clothing that becomes wet should be immediately 

removed due to its flammability hazard (i.e., for liquids with a 

flash point <100°F). 

N.R. No recommendation is made specifying the need for removing 

clothing that becomes wet or contaminated. 
xix

Table 2 (Continued) 

Personal Protection and Sanitation Codes

Code Definition

Change: Daily Workers whose clothing may have become contaminated 

should change into uncontaminated clothing before leaving 

the work premises. 

N.R. No recommendation is made specifying the need for the 

worker to change clothing after the workshift. 

Provide: Eyewash Eyewash fountains should be provided in areas where there 

is any possibility that workers could be exposed to the 

substances; this is irrespective of the recommendation 

involving the wearing of eye protection. 

Quick drench Facilities for quickly drenching the body should be 

provided within the immediate work area for emergency 

use where there is a possibility of exposure. [Note: It is 

intended that these facilities provide a sufficient quantity or 

flow of water to quickly remove the substance from any 

body areas likely to be exposed. The actual determination 

of what constitutes an adequate quick drench facility 

depends on the specific circumstances. In certain instances, 

a deluge shower should be readily available, whereas in 

others, the availability of water from a sink or hose could 

be considered adequate.] 

Frostbite 

wash 

Quick drench facilities and/or eyewash fountains should be 

provided within the immediate work area for emergency 

use where there is any possibility of exposure to liquids that 

are extremely cold or rapidly evaporating. 

Other Liq Liquid 

codes: Molt Molten 

Sol Solid 

Soln Solution containing the contaminant 

Vap Vapor 
xx

Table 3 

Symbols, Code Components, and Codes

Used for Respirator Selection

Symbol Description 

¥ At concentrations above the NIOSH REL, or where there is no REL, at any 

detectable concentration 

§ Emergency or planned entry into unknown concentrations or IDLH conditions 

* Substance reported to cause eye irritation or damage; may require eye protection

£ Substance causes eye irritation or damage; eye protection needed 

¿ Only nonoxidizable sorbents allowed (not charcoal) 

† End of service life indicator (ESLI) required 

APF Assigned protection factor 

Code 

Component Description 

95 Particulate respirator or filter that is 95% efficient. See Table 4 (page xxv) to 

select N95, R95, or P95. 

99 Particulate respirator or filter that is 99% efficient. See Table 4 (page xxv) to 

select N99, R99, or P99. 

100 Particulate respirator or filter that is 99.97% efficient. See Table 4 (page xxv) to 

select N100, R100, or P100. 

Ccr Chemical cartridge respirator 

F Full facepiece 

GmF Air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or 

back-mounted canister 

Papr Powered, air-purifying respirator 

Sa Supplied-air respirator 

Scba Self-contained breathing apparatus 

Ag Acid gas cartridge or canister 

Cf Continuous flow mode 

Hie High-efficiency particulate filter 

Ov Organic vapor cartridge or canister 

Pd,Pp Pressure-demand or other positive-pressure mode 

Qm Quarter-mask respirator 

S Chemical cartridge or canister providing protection against the compound of 

concern 

T Tight-fitting facepiece 

XQ Except quarter-mask respirator 
xxi

Table 3 (Continued) 

Symbols, Code Components, and Codes

Used for Respirator Selection

Code APF Description 

95F 10 Any air-purifying full-facepiece respirator equipped with an N95, R95, or 

P95 filter. The following filters may also be used: N99, R99, P99, N100, 

R100, P100. See Table 4 (page xxv) for information on selection of N, R, 

or P filters.

95XQ 10 Any particulate respirator equipped with an N95, R95, or P95 filter 

(including N95, R95, and P95 filtering facepieces) except quarter-mask 

respirators. The following filters may also be used: N99, R99, P99, N100, 

R100, P100. See Table 4 (page xxv) for information on selection of N, R, 

or P filters. 

100F 50 Any air-purifying, full-facepiece respirator with an N100, R100, or P100 

filter. See Table 4 (page xxv) for information on selection of N, R, or P 

filters.

100XQ 10 Any air-purifying respirator with an N100, R100, or P100 filter (including 

N100, R100, and P100 filtering facepieces) except quarter-mask respirators. 

See Table 4 (page xxv) for information on selection of N, R, or P filters. 

CcrFAg100 50 Any chemical cartridge respirator with a full facepiece and acid gas 

cartridge(s) in combination with an N100, R100, or P100 filter. See 

Table 4 (page xxv) for information on selection of N, R, or P filters. 

CcrFOv 50 Any air-purifying full-facepiece respirator equipped with organic vapor 

cartridge(s). 

CcrFOv95 10 Any full-facepiece respirator with organic vapor cartridge(s) in combination 

with an N95, R95, or P95 filter. The following filters may also be used: 

N99, R99, P99, N100, R100, P100. See Table 4 (page xxv) for information 

on selection of N, R, or P filters.

CcrFOv100 50 Any air-purifying full-facepiece respirator equipped with organic vapor 

cartridge(s) in combination with an N100, R100, or P100 filter. See 

Table 4 (page xxv) for information on selection of N, R, or P filters.

CcrFS 50 Any air-purifying full-facepiece respirator equipped with cartridge(s) 

providing protection against the compound of concern. 

CcrFS100 50 Any air-purifying full-facepiece respirator equipped with cartridge(s) 

providing protection against the compound of concern in combination with 

an N100, R100, or P100 filter. See Table 4 (page xxv) for information on 

selection of N, R, or P filters.

CcrOv 10 Any air-purifying half-mask respirator equipped with organic vapor 

cartridge(s). 
xxii

Table 3 (Continued) 

Symbols, Code Components, and Codes

Used for Respirator Selection

Code APF Description 

CcrOv95 10 Any air-purifying half-mask respirator with organic vapor cartridge(s) in 

combination with an N95, R95, or P95 filter. The following filters may 

also be used: N99, R99, P99, N100, R100, P100. See Table 4 (page xxv) 

for information on selection of N, R, or P filters.

CcrOv100 10 Any air-purifying half-mask respirator with organic vapor cartridge(s) in 

combination with an N100, R100, or P100 filter. See Table 4 (page xxv) 

for information on selection of N, R, or P filters.

CcrOvAg 10 Any air-purifying half-mask respirator equipped with organic vapor and 

acid gas cartridge(s). 

CcrS 10 Any air-purifying half-mask respirator equipped with cartridge(s) 

providing protection against the compound of concern. 

GmFAg 50 Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, 

front- or back-mounted acid gas canister. 

GmFAg100 50 Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, 

front- or back-mounted acid gas canister having an N100, R100, or P100 

filter. See Table 4 (page xxv) for information on selection of N, R, or P 

filters.

GmFOv 50 Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, 

front- or back-mounted organic vapor canister. 

GmFOv95 10 Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, 

front- or back-mounted organic vapor canister in combination with an 

N95, R95, or P95 filter. The following filters may also be used: N99, 

R99, P99, N100, R100, P100. See Table 4 (page xxv) for information on 

selection of N, R, or P filters.

GmFOv100 50 Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, 

front- or back-mounted organic vapor canister having an N100, R100, or 

P100 filter. See Table 4 (page xxv) for information on selection of N, R, 

or P filters.

GmFOvAg 50 Any air-purifying, full facepiece respirator (gas mask) with a chin-style, 

front- or back-mounted organic vapor and acid gas canister. 

GmFOvAg100 50 Any air-purifying, full facepiece respirator (gas mask) with a chin-style, 

front- or back-mounted organic vapor and acid gas canister having an 

N100, R100, or P100 filter. See Table 4 (page xxv) for information on 

selection of N, R, or P filters.

GmFS 50 Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, 

front- or back-mounted canister providing protection against the 

compound of concern. 

 
xxiii

Table 3 (Continued) 

Symbols, Code Components, and Codes

Used for Respirator Selection

Code APF Description 

GmFS100 50 Any air-purifying, full-facepiece respirator (gas mask) with a 

chin-style, front- or back-mounted canister providing protection 

against the compound of concern and having an N100, R100, or 

P100 filter. See Table 4 (page xxv) for information on selection 

of N, R, or P filters.

PaprAg 25 Any powered air-purifying respirator with acid gas cartridge(s). 

PaprAgHie 25 Any powered air-purifying respirator with acid gas cartridge(s) in 

combination with a high-efficiency particulate filter. 

PaprHie 25 Any powered air-purifying respirator with a high-efficiency 

particulate filter. 

PaprOv 25 Any powered air-purifying respirator with organic vapor 

cartridge(s). 

PaprOvAg 25 Any powered air-purifying respirator with organic vapor and acid 

gas cartridge(s). 

PaprOvHie 25 Any powered air-purifying respirator with an organic vapor 

cartridge in combination with a high-efficiency particulate filter. 

PaprS 25 Any powered air-purifying respirator with cartridge(s) providing 

protection against the compound of concern. 

PaprTHie 50 Any powered air-purifying respirator with a tight-fitting 

facepiece and a high-efficiency particulate filter. 

PaprTOv 50 Any powered air-purifying respirator with a tight-fitting 

facepiece and organic vapor cartridge(s). 

PaprTOvHie 50 Any powered air-purifying respirator with a tight-fitting 

facepiece and organic vapor cartridge(s) in combination with a 

high-efficiency particulate filter. 

PaprTS 50 Any powered air-purifying respirator with a tight-fitting 

facepiece and cartridge(s) providing protection against the 

compound of concern. 

Qm 5 Any quarter-mask respirator. See Table 4 (page xxv) for 

information on selection of N, R, or P particulate filters. 

Sa 10 Any supplied-air respirator. 

Sa:Cf 25 Any supplied-air respirator operated in a continuous-flow mode. 

Sa:Pd,Pp 1,000 Any supplied-air respirator operated in a pressure-demand or 

other positive-pressure mode. 
xxiv

Table 3 (Continued) 

Symbols, Code Components, and Codes

Used for Respirator Selection

Code APF Description 

SaF 50 Any supplied-air respirator with a full facepiece. 

SaF:Pd,Pp 2,000 Any supplied-air respirator that has a full facepiece and is 

operated in a pressure-demand or other positive pressure mode. 

SaF:Pd,Pp:AScba 10,000 Any supplied-air respirator that has a full-facepiece and is 

operated in a pressure-demand or other positive-pressure mode in 

combination with an auxiliary self-contained breathing apparatus 

operated in pressure-demand or other positive-pressure mode. 

SaT:Cf 50 Any supplied-air respirator that has a tight-fitting facepiece and is 

operated in a continuous-flow mode. 

ScbaE Any appropriate escape-type, self-contained breathing apparatus.

ScbaF 50 Any self-contained breathing apparatus with a full facepiece. 

ScbaF:Pd,Pp 10,000 Any self-contained breathing apparatus that has a full facepiece 

and is operated in a pressure-demand or other positive-pressure 

mode. 
xxv

Table 4 

Selection of N-, R-, or P-Series Particulate Respirators

1. The selection of N-, R-, and P-series filters depends on the presence of oil particles as 

follows: 

● If no oil particles are present in the work environment, use a filter of any series 

(i.e., N-, R-, or P-series). 

●

If oil particles (e.g., lubricants, cutting fluids, glycerine) are present, use an 

R- or P-series filter. Note: N-series filters cannot be used if oil particles are 

present. 

● If oil particles are present and the filter is to be used for more than one work shift, use 

only a P-series filter. 

Note: To help you remember the filter series, use the following guide:

N for Not resistant to oil, 

R for Resistant to oil, 

P for oil Proof. 

2. Selection of filter efficiency (i.e., 95%, 99%, or 99.97%) depends on how much filter 

leakage can be accepted. Higher filter efficiency means lower filter leakage. 

3. The choice of facepiece depends on the level of protection needed – that is, the assigned 

protection factor (APF) needed. See Table 3 (page xx) for APFs of respirator classes, and 

see Recommendations for Respirator Selection (page xiv) for more information. 
xxvi

Table 5 

Abbreviations for Exposure Routes, Symptoms, and Target Organs

Code Definition Code Definition 

abdom Abdominal dizz Dizziness 

abnor Abnormal/Abnormalities drow Drowsiness 

abs Skin absorption dysp Dyspnea (breathing difficulty) 

album Albuminuria emphy Emphysema 

anes Anesthesia eosin Eosinophilia 

anor Anorexia epilep Epileptiform 

anos Anosmia (loss of the sense of smell) epis Epistaxis (nosebleed) 

anxi Anxiety equi Equilibrium 

arrhy Arrhythmias eryt Erythema (skin redness) 

aspir Aspiration euph Euphoria 

asphy Asphyxia fail Failure 

BP Blood pressure fasc Fasciculation 

breath Breath/breathing FEV Forced expiratory volume 

bron Bronchitis fib Fibrosis 

BUN Blood urea nitrogen ftg Fatigue 

[carc] Potential occupational carcinogen func Function 

card Cardiac GI Gastrointestinal 

chol Cholinesterase halu Hallucinations 

cirr Cirrhosis head Headache 

CNS Central nervous system hema Hematuria (blood in the urine) 

conc Concentration hemato Hematopoietic 

con Skin and/or eye contact hemorr Hemorrhage 

conf Confusion hyperpig Hyperpigmentation 

conj Conjunctivitis hypox Hypoxemia (reduced O2 in the blood) 

constip Constipation inco Incoordination 

convuls Convulsions incr Increased 

corn Corneal inebri Inebriation 

CVS Cardiovascular system inflamm Inflammation 

cyan Cyanosis ing Ingestion 

decr Decreased inh Inhalation 

depres Depressed/Depression inj Injury 

derm Dermatitis insom Insomnia 

diarr Diarrhea irreg Irregular/Irregularities 

dist Disturbance irrit Irritation 
xxvii

Table 5 (Continued) 

Abbreviations for Exposure Routes, Symptoms, and Target Organs

Code Definition Code Definition 

irrity Irritability prot Proteinuria 

jaun Jaundice pulm Pulmonary 

kera Keratitis (inflammation of the cornea) RBC Red blood cell 

lac Lacrimation (discharge of tears) repro Reproductive 

lar Laryngeal resp Respiratory/respiration 

lass Lassitude (weakness, exhaustion) restless Restlessness 

leucyt Leukocytosis (increased 

blood leukocytes) retster Retrosternal (occurring behind the sternum) 

leupen Leukopenia (reduced blood leukocytes)

liq Liquid 

 rhin Rhinorrhea (discharge of 

thin nasal mucus) 

local Localized salv Salivation 

low-wgt Weight loss sens Sensitization 

mal Malaise (vague feeling of discomfort) short Shortness 

malnut Malnutrition sneez Sneezing 

methemo Methemoglobinemia sol Solid 

muc memb Mucous membrane soln Solution 

musc Muscle 

narco Narcosis 

 subs Substernal (occurring 

beneath the sternum) 

nau Nausea sweat Sweating 

nec Necrosis swell Swelling 

neph Nephritis sys System 

numb Numb/numbness tacar Tachycardia 

opac Opacity tend Tenderness 

palp Palpitations terato Teratogenic 

para Paralysis throb Throbbing 

pares Paresthesia tight Tightness 

perf Perforation twitch Twitching 

peri neur Peripheral neuropathy uncon Unconsciousness 

periorb Periorbital (situated around the eye) vap Vapor 

phar Pharyngeal vesic Vesiculation 

 vis Visual 

photo Photophobia (abnormal visual 

intolerance to light) vomit Vomiting 

pneu Pneumonitis weak Weak/weakness 

PNS Peripheral nervous system wheez Wheezing 

polyneur Polyneuropathy 
xxviii

Table 6 

Codes for First Aid Data

Code Definition 

Eye: 

Irr immed If this chemical contacts the eyes, immediately wash (irrigate) the eyes 

with large amounts of water, occasionally lifting the lower and upper 

lids. Get medical attention immediately. 

Irr prompt If this chemical contacts the eyes, promptly wash (irrigate) the eyes 

with large amounts of water, occasionally lifting the lower and upper 

lids. Get medical attention if any discomfort continues. 

Frostbite If eye tissue is frozen, seek medical attention immediately; if tissue is 

not frozen, immediately and thoroughly flush the eyes with large 

amounts of water for at least 15 minutes, occasionally lifting the lower 

and upper eyelids. If irritation, pain, swelling, lacrimation, or 

photophobia persist, get medical attention as soon as possible. 

Medical attention Get medical attention. 

Skin: 

Blot/brush away If irritation occurs, gently blot or brush away excess. 

Dust off solid; 

water flush 

If this solid chemical contacts the skin, dust it off immediately and 

then flush the contaminated skin with water. If this chemical or liquids 

containing this chemical penetrate the clothing, promptly remove the 

clothing and flush the skin with water. Get medical attention 

immediately. 

Frostbite If frostbite has occurred, seek medical attention immediately; do NOT 

rub the affected areas or flush them with water. In order to prevent 

further tissue damage, do NOT attempt to remove frozen clothing from 

frostbitten areas. If frostbite has NOT occurred, immediately and 

thoroughly wash contaminated skin with soap and water. 

Molten flush immed/ 

sol-liq soap 

wash prompt 

If this molten chemical contacts the skin, immediately flush the skin 

with large amounts of water. Get medical attention immediately. If 

this chemical (or liquids containing this chemical) contacts the skin, 

promptly wash the contaminated skin with soap and water. If this 

chemical or liquids containing this chemical penetrate the clothing, 

immediately remove the clothing and wash the skin with soap and 

water. If irritation persists after washing, get medical attention. 

Soap flush immed If this chemical contacts the skin, immediately flush the contaminated 

skin with soap and water. If this chemical penetrates the clothing, 

immediately remove the clothing and flush the skin with water. If 

irritation persists after washing, get medical attention. 

Soap flush prompt If this chemical contacts the skin, promptly flush the contaminated 

skin with soap and water. If this chemical penetrates the clothing, 

promptly remove the clothing and flush the skin with water. If 

irritation persists after washing, get medical attention. 
xxix

Table 6 (Continued) 

Codes for First Aid Data 

Code Definition 

Skin (continued): 

Soap prompt/molten 

flush immed 

If this solid chemical or a liquid containing this chemical contacts the 

skin, promptly wash the contaminated skin with soap and water. If 

irritation persists after washing, get medical attention. If this molten 

chemical contacts the skin or nonimpervious clothing, immediately 

flush the affected area with large amounts of water to remove heat. 

Get medical attention immediately. 

Soap wash If this chemical contacts the skin, wash the contaminated skin with 

soap and water. 

Soap wash immed If this chemical contacts the skin, immediately wash the contaminated 

skin with soap and water. If this chemical penetrates the clothing, 

immediately remove the clothing, wash the skin with soap and water, 

and get medical attention promptly. 

Soap wash prompt If this chemical contacts the skin, promptly wash the contaminated 

skin with soap and water. If this chemical penetrates the clothing, 

promptly remove the clothing and wash the skin with soap and water. 

Get medical attention promptly. 

Water flush If this chemical contacts the skin, flush the contaminated skin with 

water. Where there is evidence of skin irritation, get medical attention. 

Water flush immed If this chemical contacts the skin, immediately flush the contaminated 

skin with water. If this chemical penetrates the clothing, immediately 

remove the clothing and flush the skin with water. Get medical 

attention promptly. 

Water flush prompt If this chemical contacts the skin, flush the contaminated skin with 

water promptly. If this chemical penetrates the clothing, immediately 

remove the clothing and flush the skin with water promptly. If 

irritation persists after washing, get medical attention. 

Water wash If this chemical contacts the skin, wash the contaminated skin with 

water. 

Water wash immed If this chemical contacts this skin, immediately wash the contaminated 

skin with water. If this chemical penetrates the clothing, immediately 

remove the clothing and wash the skin with water. If symptoms occur 

after washing, get medical attention immediately. 

Water wash prompt If this chemical contacts the skin, promptly wash the contaminated 

skin with water. If this chemical penetrates the clothing, promptly 

remove the clothing and wash the skin with water. If irritation persists 

after washing, get medical attention. 
xxx

Table 6 (Continued) 

Codes for First Aid Data

Code Definition 

Breath: 

Resp support If a person breathes large amounts of this chemical, move the 

exposed person to fresh air at once. If breathing has stopped, 

perform artificial respiration. Keep the affected person warm and at 

rest. Get medical attention as soon as possible. 

Fresh air If a person breathes large amounts of this chemical, move the 

exposed person to fresh air at once. Other measures are usually 

unnecessary. 

Fresh air; 100% O2 If a person breathes large amounts of this chemical, move the 

exposed person to fresh air at once. If breathing has stopped, 

perform artificial respiration. When breathing is difficult, properly 

trained personnel may assist the affected person by administering 

100% oxygen. Keep the affected person warm and at rest. Get 

medical attention as soon as possible. 

Swallow: 

Medical attention 

immed 

If this chemical has been swallowed, get medical attention 

immediately. 
1

CHEMICAL LISTING
A 

Acetaldehyde Formula: 

CH3CHO 

CAS#: 

75-07-0 

RTECS#: 

AB1925000 

IDLH: 

Ca [2000 ppm]

Conversion: 1 ppm = 1.80 mg/m3 DOT: 1089 129 

Synonyms/Trade Names: Acetic aldehyde, Ethanal, Ethyl aldehyde 

Exposure Limits: 

NIOSH REL: Ca OSHA PEL†: TWA 200 ppm (360 mg/m3) 

 See Appendix A 

 See Appendix C (Aldehydes) 

Physical Description: Colorless liquid or gas (above 69°F) with a pungent, fruity odor. 

Measurement Methods 

(see Table 1): 

NIOSH 2018, 2538, 3507 

OSHA 68 

Chemical & Physical Properties: 

MW: 44.1 

BP: 69°F 

Sol: Miscible 

Fl.P: -36°F 

IP: 10.22 eV 

Sp.Gr: 0.79 

VP: 740 mmHg 

FRZ: -190°F 

UEL: 60% 

LEL: 4.0% 

Class IA Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, acids, bases, alcohols, ammonia & amines, phenols, 

ketones, HCN, H2S [Note: Prolonged contact with air may cause formation of peroxides that may explode and 

burst containers; easily undergoes polymerization.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, nose, throat; eye, skin burns; derm; conj; cough; CNS depres; 

delayed pulm edema; in animals: kidney, repro, terato effects; [carc] 

TO: Eyes, skin, resp sys, kidneys, CNS, repro sys [in animals: nasal cancer] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush prompt 

Breath: Resp support 

Swallow: Medical attention immed 

Acetic acid Formula: 

CH3COOH 

CAS#: 

64-19-7 

RTECS#: 

AF1225000 

IDLH: 

50 ppm 

Conversion: 1 ppm = 2.46 mg/m3 DOT: 2790 153 (10-80% acid); 2789 132 (>80% acid) 

Synonyms/Trade Names: Acetic acid (aqueous), Ethanoic acid, Glacial acetic acid (pure compound), 

Methanecarboxylic acid [Note: Can be found in concentrations of 5-8% in vinegar.] 

Exposure Limits: 

NIOSH REL: TWA 10 ppm (25 mg/m3

) OSHA PEL: TWA 10 ppm (25 mg/m3) 

 ST 15 ppm (37 mg/m3

) 

Physical Description: Colorless liquid or crystals with a sour, vinegar-like odor. 

[Note: Pure compound is a solid below 62°F. Often used in an aqueous solution.] 

Measurement Methods 

(see Table 1): 

NIOSH 1603 

OSHA ID186SG 

Chemical & Physical Properties: 

MW: 60.1 

BP: 244°F 

Sol: Miscible 

Fl.P: 103°F 

IP: 10.66 eV 

Sp.Gr: 1.05 

VP: 11 mmHg 

FRZ: 62°F 

UEL(200°F): 19.9% 

LEL: 4.0% 

Class II Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact (>10%) 

Eyes: Prevent eye contact 

Wash skin: When contam (>10%) 

Remove: When wet or contam (>10%) 

Change: N.R. 

Provide: Eyewash (>5%) 

 Quick drench (>50%) 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

50 ppm: Sa:Cf£/PaprOv£/CcrFOv/ 

 GmFOv/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers (especially chromic acid, sodium peroxide & nitric acid), 

strong caustics [Note: Corrosive to metals.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con 

SY: Irrit eyes, skin, nose, throat; eye, skin burns; skin sens; dental 

erosion; black skin, hyperkeratosis; conj, lac; phar edema, chronic bron 

TO: Eyes, skin, resp sys, teeth 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

2
A 

Acetic anhydride Formula: 

(CH3CO)2O 

CAS#: 

108-24-7 

RTECS#: 

AK1925000 

IDLH: 

200 ppm 

Conversion: 1 ppm = 4.18 mg/m3 DOT: 1715 137 

Synonyms/Trade Names: Acetic acid anhydride, Acetic oxide, Acetyl oxide, Ethanoic anhydride 

Exposure Limits: 

NIOSH REL: C 5 ppm (20 mg/m3) 

OSHA PEL†: TWA 5 ppm (20 mg/m3

) 

Physical Description: Colorless liquid with a strong, pungent, vinegar-like odor. 

Measurement Methods 

(see Table 1): 

NIOSH 3506 

OSHA 82, 102 

Chemical & Physical 

Properties: 

MW: 102.1 

BP: 282°F 

Sol: 12% 

Fl.P: 120°F 

IP: 10.00 eV 

Sp.Gr: 1.08 

VP: 4 mmHg 

FRZ: -99°F 

UEL: 10.3% 

LEL: 2.7% 

Class II Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

125 ppm: Sa:Cf£/PaprOv£ 

200 ppm: CcrFOv/GmFOv/PaprTOv£/ 

 ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Water, alcohols, strong oxidizers (especially chromic acid), amines, 

strong caustics [Note: Corrosive to iron, steel & other metals. Reacts with water to form acetic acid.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Conj, lac, corn edema, opac, photo; nasal, phar irrit; cough, 

dysp, bron; skin burns, vesic, sens derm 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

Acetone Formula: 

(CH3)2CO 

CAS#: 

67-64-1 

RTECS#: 

AL3150000 

IDLH: 

2500 ppm [10%LEL] 

Conversion: 1 ppm = 2.38 mg/m3 DOT: 1090 127 

Synonyms/Trade Names: Dimethyl ketone, Ketone propane, 2-Propanone 

Exposure Limits: 

NIOSH REL: TWA 250 ppm (590 mg/m3

) 

OSHA PEL†: TWA 1000 ppm (2400 mg/m3

) 

Physical Description: Colorless liquid with a fragrant, mint-like odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1300, 2555, 3800 

OSHA 69 

Chemical & Physical 

Properties: 

MW: 58.1 

BP: 133°F 

Sol: Miscible 

Fl.P: 0°F 

IP: 9.69 eV 

Sp.Gr: 0.79 

VP: 180 mmHg 

FRZ: -140°F 

UEL: 12.8% 

LEL: 2.5% 

Class IB Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

2500 ppm: CcrOv*/PaprOv*/GmFOv/ 

 Sa*/ScbaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Oxidizers, acids 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, nose, throat; head, dizz, CNS depres; derm 

TO: Eyes, skin, resp sys, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

3
A 

Acetone cyanohydrin Formula: 

CH3C(OH)CNCH3

CAS#: 

75-86-5 

RTECS#: 

OD9275000 

IDLH: 

N.D. 

Conversion: 1 ppm = 3.48 mg/m3 DOT: 1541 155 (stabilized) 

Synonyms/Trade Names: Cyanohydrin-2-propanone, 2-Cyano-2-propanol, α-Hydroxyisobutyronitrile, 

2-Hydroxy-2-methyl-propionitrile, 2-Methyllactonitrile 

Exposure Limits: 

NIOSH REL: C 1 ppm (4 mg/m3

) [15-minute] 

OSHA PEL: none 

Physical Description: Colorless liquid with a faint odor of bitter almond. 

[Note: Forms cyanide in the body.] 

Measurement Methods 

(see Table 1): 

NIOSH 2506 

Chemical & Physical 

Properties: 

MW: 85.1 

BP: 203°F 

Sol: Miscible 

Fl.P: 165°F 

IP: ? 

Sp.Gr(77°F): 0.93 

VP: 0.8 mmHg 

FRZ: -4°F 

UEL: 12.0% 

LEL: 2.2% 

Class IIIA Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

10 ppm: Sa 

25 ppm: Sa:Cf 

50 ppm: ScbaF/SaF 

250 ppm: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Sulfuric acid, caustics [Note: Slowly decomposes to acetone & HCN at room 

temperatures; rate is accelerated by an increase in pH, water content, or temperature.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, resp sys; dizz, lass, head, conf, convuls; liver, 

kidney inj; pulm edema, asphy 

TO: Eyes, skin, resp sys, CNS, CVS, liver, kidneys, GI tract 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

Acetonitrile Formula: 

CH3CN 

CAS#: 

75-05-8 

RTECS#: 

AL7700000 

IDLH: 

500 ppm 

Conversion: 1 ppm = 1.68 mg/m3 DOT: 1648 127 

Synonyms/Trade Names: Cyanomethane, Ethyl nitrile, Methyl cyanide [Note: Forms cyanide in the body.] 

Exposure Limits: 

NIOSH REL: TWA 20 ppm (34 mg/m3) 

OSHA PEL†: TWA 40 ppm (70 mg/m3

) 

Physical Description: Colorless liquid with an aromatic odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1606 

Chemical & Physical 

Properties: 

MW: 41.1 

BP: 179°F 

Sol: Miscible 

Fl.P(oc): 42°F 

IP: 12.20 eV 

Sp.Gr: 0.78 

VP: 73 mmHg 

FRZ: -49°F 

UEL: 16.0% 

LEL: 3.0% 

Class IB Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Provide: Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

200 ppm: CcrOv/Sa 

500 ppm: Sa:Cf/PaprOv/CcrFOv/GmFOv/ 

 ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit nose, throat; asphy; nau, vomit; chest pain; lass; stupor, convuls; 

in animals: liver, kidney damage 

TO: Resp sys, CVS, CNS, liver, kidneys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

4
A 

2-Acetylaminofluorene Formula: 

C15H13NO 

CAS#: 

53-96-3 

RTECS#: 

AB9450000 

IDLH: 

Ca [N.D.] 

Conversion: DOT: 

Synonyms/Trade Names: AAF, 2-AAF, 2-Acetaminofluorene, N-Acetyl-2-aminofluorene, FAA, 2-FAA, 

2-Fluorenylacetamide 

Exposure Limits: 

NIOSH REL: Ca 

 See Appendix A 

OSHA PEL: [1910.1014] See Appendix B 

Physical Description: Tan, crystalline powder. 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical 

Properties: 

MW: 223.3 

BP: ? 

Sol: Insoluble 

Fl.P: ? 

IP:? 

Sp.Gr: ? 

VP: ? 

MLT: 381°F 

UEL: ? 

LEL: ? 

Combustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam/Daily 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

See Appendix E (page 351) 

Incompatibilities and Reactivities: None reported 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Reduced function of liver, kidneys, bladder, pancreas; [carc] 

TO: Liver, bladder, kidneys, pancreas, skin [in animals: tumors of 

the liver, bladder, lungs, skin & pancreas] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

Acetylene Formula: 

HC≡CH 

CAS#: 

74-86-2 

RTECS#: 

AO9600000 

IDLH: 

N.D. 

Conversion: 1 ppm = 1.06 mg/m3 DOT: 1001 116 

Synonyms/Trade Names: Ethine, Ethyne [Note: A compressed gas used in the welding & cutting of metals.] 

Exposure Limits: 

NIOSH REL: C 2500 ppm (2662 mg/m3) 

OSHA PEL: none 

Physical Description: Colorless gas with a faint, ethereal odor. [Note: Commercial 

grade has a garlic-like odor. Shipped under pressure dissolved in acetone.] 

Measurement Methods 

(see Table 1): 

NIOSH 

Acetylene Criteria Document 

Chemical & Physical Properties: 

MW: 26.0 

BP: Sublimes 

Sol: 2% 

Fl.P: NA (Gas) 

IP: 11.40 eV 

RGasD: 0.91 

VP: 44.2 atm 

FRZ: -119°F (Sublimes) 

UEL: 100% 

LEL: 2.5% 

Flammable Gas 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Frostbite 

Eyes: Frostbite 

Wash skin: N.R. 

Remove: When wet (flamm) 

Change: N.R. 

Provide: Frostbite wash 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Zinc; oxygen & other oxidizing agents such as halogens [Note: Forms 

explosive acetylide compounds with copper, mercury, silver & brasses (containing more than 66% copper).] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con (liquid) 

SY: Head, dizz; asphy; liquid: frostbite 

TO: CNS, resp sys 

First Aid (see Table 6): 

Eye: Frostbite 

Skin: Frostbite 

Breath: Fresh air 

5
A 

Acetylene tetrabromide Formula: 

CHBr2CHBr2

CAS#: 

79-27-6 

RTECS#: 

KI8225000 

IDLH: 

8 ppm 

Conversion: 1 ppm = 14.14 mg/m3 DOT: 2504 159 

Synonyms/Trade Names: Symmetrical tetrabromoethane, TBE, Tetrabromoacetylene, Tetrabromoethane, 

1,1,2,2-Tetrabromoethane 

Exposure Limits: 

NIOSH REL: See Appendix D 

OSHA PEL: TWA 1 ppm (14 mg/m3

) 

Physical Description: Pale-yellow liquid with a pungent odor similar to camphor or 

iodoform. [Note: A solid below 32°F.] 

Measurement Methods 

(see Table 1): 

NIOSH 2003 

Chemical & Physical Properties: 

MW: 345.7 

BP: 474°F (Decomposes) 

Sol: 0.07% 

Fl.P: NA 

IP: ? 

Sp.Gr: 2.97 

VP: 0.02 mmHg 

FRZ: 32°F 

UEL: NA 

LEL: NA 

Noncombustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

OSHA 

8 ppm: Sa/ScbaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong caustics; hot iron; reducing metals such as aluminum, 

magnesium, and zinc 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, nose; anor, nau; head; abdom pain; jaun; leucyt; 

CNS depres 

TO: Eyes, resp sys, liver, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush prompt 

Breath: Resp support 

Swallow: Medical attention immed 

Acetylsalicylic acid Formula: 

CH3COOC6H4COOH

CAS#: 

50-78-2 

RTECS#: 

VO0700000 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: o-Acetoxybenzoic acid, 2-Acetoxybenzoic acid, Aspirin 

Exposure Limits: 

NIOSH REL: TWA 5 mg/m3

 

OSHA PEL†: none 

Physical Description: Odorless, colorless to white, crystal-line powder. [aspirin] 

[Note: Develops the vinegar-like odor of acetic acid on contact with moisture.] 

Measurement Methods 

(see Table 1): 

NIOSH 0500 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: N.R. 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Chemical & Physical Properties: 

MW: 180.2 

BP: 284°F (Decomposes) 

Sol(77°F): 0.3% 

Fl.P: NA 

IP: NA 

Sp.Gr: 1.35 

VP: 0 mmHg (approx) 

MLT: 275°F 

UEL: NA 

LEL: NA 

MEC: 40 g/m3

Combustible Powder; explosion 

hazard if dispersed in air. 

Incompatibilities and Reactivities: Solutions of alkali hydroxides or 

carbonates, strong oxidizers, moisture 

[Note: Slowly hydrolyzes in moist air to salicyclic & acetic acids.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, upper resp sys; incr blood clotting time; nau, 

vomit; liver, kidney inj 

TO: Eyes, skin, resp sys, blood, liver, kidneys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash 

Breath: Resp support 

Swallow: Medical attention immed 

6
A 

Acrolein Formula: 

CH2=CHCHO 

CAS#: 

107-02-8 

RTECS#: 

AS1050000 

IDLH: 

2 ppm 

Conversion: 1 ppm = 2.29 mg/m3 DOT: 1092 131P (inhibited) 

Synonyms/Trade Names: Acraldehyde, Acrylaldehyde, Acrylic aldehyde, Allyl aldehyde, Propenal, 2-Propenal 

Exposure Limits: 

NIOSH REL: TWA 0.1 ppm (0.25 mg/m3) 

 ST 0.3 ppm (0.8 mg/m3) 

 See Appendix C (Aldehydes) 

OSHA PEL†: TWA 0.1 ppm (0.25 mg/m3) 

Physical Description: Colorless or yellow liquid with a piercing, disagreeable odor. 

Measurement Methods 

(see Table 1): 

NIOSH 2501 

OSHA 52 

Chemical & Physical Properties: 

MW: 56.1 

BP: 127°F 

Sol: 40% 

Fl.P: -15°F 

IP: 10.13 eV 

Sp.Gr: 0.84 

VP: 210 mmHg 

FRZ: -126°F 

UEL: 31% 

LEL: 2.8% 

Class IB Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

2 ppm: Sa:Cf*/PaprOv*/CcrFOv/ 

 GmFOv/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Oxidizers, acids, alkalis, ammonia, amines [Note: Polymerizes readily unless 

inhibited--usually with hydroquinone. May form shock-sensitive peroxides over time.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, muc memb; decr pulm func; delayed pulm 

edema; chronic resp disease 

TO: Eyes, skin, resp sys, heart 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

Acrylamide Formula: 

CH2=CHCONH2

CAS#: 

79-06-1 

RTECS#: 

AS3325000 

IDLH: 

Ca [60 mg/m3] 

Conversion: DOT: 2074 153P 

Synonyms/Trade Names: Acrylamide monomer, Acrylic amide, Propenamide, 2-Propenamide 

Exposure Limits: 

NIOSH REL: Ca 

 TWA 0.03 mg/m3

 [skin] 

 See Appendix A 

OSHA PEL†: TWA 0.3 mg/m3 [skin] 

Physical Description: White crystalline, odorless solid. 

Measurement Methods 

(see Table 1): 

OSHA 21, PV2004 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam/Daily 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Chemical & Physical Properties: 

MW: 71.1 

BP: 347-572°F (Decomposes) 

Sol(86°F): 216% 

Fl.P: 280°F 

IP: 9.50 eV 

Sp.Gr: 1.12 

VP: 0.007 mmHg 

MLT: 184°F 

UEL: ? 

LEL: ? 

Combustible Solid (may also be 

dissolved in flammable liquids). Incompatibilities and Reactivities: Strong oxidizers 

[Note: May polymerize violently upon melting.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin; ataxia, numb limbs, pares; musc weak; absent 

deep tendon reflex; hand sweat; lass, drow; repro effects; [carc] 

TO: Eyes, skin, CNS, PNS, repro sys [in animals: tumors of the 

lungs, testes, thyroid & adrenal glands] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

7
A CAS#: Acrylic acid Formula: 

CH2=CHCOOH 79-10-7 

RTECS#: 

AS4375000 

IDLH: 

N.D. 

Conversion: 1 ppm = 2.95 mg/m3 DOT: 2218 132P (inhibited) 

Synonyms/Trade Names: Acroleic acid, Aqueous acrylic acid (technical grade is 94%), Ethylenecarboxylic acid, 

Glacial acrylic acid (98% in aqueous solution), 2-Propenoic acid 

Exposure Limits: 

NIOSH REL: TWA 2 ppm (6 mg/m3

) [skin] 

OSHA PEL†: none 

Measurement Methods 

(see Table 1): 

OSHA 28, PV2005 

Physical Description: Colorless liquid or solid (below 55°F) with a distinctive, acrid odor. 

[Note: Shipped with an inhibitor (e.g., hydroquinone) since it readily polymerizes.] 

Personal Protection/Sanitation 

8

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Chemical & Physical Properties: 

MW: 72.1 

BP: 286°F 

Sol: Miscible 

Fl.P: 121°F 

IP: ? 

Sp.Gr: 1.05 

VP: 3 mmHg 

FRZ: 55°F 

UEL: 8.02% 

LEL: 2.4% 

Class II Combustible Liquid 

Incompatibilities and Reactivities: Oxidizers, amines, alkalis, 

ammonium hydroxide, chloro-sulfonic acid, oleum, ethylene diamine, 

ethyleneimine, 2-aminoethanol [Note: Corrosive to many metals.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, resp sys; eye, skin burns; skin sens; in 

animals: lung, liver, kidney inj 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

Acrylonitrile Formula: 

CH2=CHCN 

CAS#: 

107-13-1 

RTECS#: 

AT5250000 

IDLH: 

Ca [85 ppm] 

Conversion: 1 ppm = 2.17 mg/m3 DOT: 1093 131P (inhibited) 

Synonyms/Trade Names: Acrylonitrile monomer, AN, Cyanoethylene, Propenenitrile, 2-Propenenitrile, VCN, 

Vinyl cyanide 

Exposure Limits: 

NIOSH REL: Ca 

 TWA 1 ppm 

 C 10 ppm [15-minute] [skin] 

 See Appendix A 

OSHA PEL: [1910.1045] TWA 2 ppm 

 C 10 ppm [15-minute] [skin] 

Measurement Methods 

(see Table 1): 

NIOSH 1604 

OSHA 37 

Physical Description: Colorless to pale-yellow liquid with an unpleasant odor. [Note: Odor can only be detected 

above the PEL.] 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

See Appendix E (page 351)

Chemical & Physical Properties: 

MW: 53.1 

BP: 171°F 

Sol: 7% 

Fl.P: 30°F 

IP: 10.91 eV 

Sp.Gr: 0.81 

VP: 83 mmHg 

FRZ: -116°F 

UEL: 17% 

LEL: 3.0% 

Class IB Flammable Liquid 

Incompatibilities and Reactivities: Strong oxidizers, acids & alkalis; 

bromine; amines [Note: Unless inhibited (usually with methylhydroquinone), 

may polymerize spontaneously or when heated or in presence of strong 

alkali. Attacks copper.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin; asphy; head; sneez; nau, vomit; lass, dizz; skin vesic; 

scaling derm; [carc] 

TO: Eyes, skin, CVS, liver, kidneys, CNS [brain tumors, lung & bowel cancer]

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water wash immed 

Breath: Resp support 

Swallow: Medical attention immed 
A 

Adiponitrile Formula: 

NC(CH2)4CN 

CAS#: 

111-69-3 

RTECS#: 

AV2625000 

IDLH: 

N.D. 

Conversion: 1 ppm = 4.43 mg/m3 DOT: 2205 153 

Synonyms/Trade Names: 1,4-Dicyanobutane, Hexanedinitrile, Tetramethylene cyanide 

Exposure Limits: 

NIOSH REL: TWA 4 ppm (18 mg/m3) OSHA PEL: none 

Physical Description: Water-white, practically odorless, oily liquid. 

[Note: A solid below 34°F. Forms cyanide in the body.] 

Measurement Methods 

(see Table 1): 

NIOSH 

Nitriles Criteria Document 

Chemical & Physical Properties: 

MW: 108.2 

BP: 563°F 

Sol: 4.5% 

Fl.P(oc): 199°F 

IP: ? 

Sp.Gr: 0.97 

VP: 0.002 mmHg 

FRZ: 34°F 

UEL: 5.0% 

LEL: 1.7% 

Class IIIA Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

40 ppm: Sa 

100 ppm: Sa:Cf 

200 ppm: ScbaF/SaF 

250 ppm: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Oxidizers (e.g., perchlorates, nitrates), strong acids (e.g., sulfuric acid) 

[Note: Decomposes above 194°F, forming hydrogen cyanide.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, resp sys; head, dizz, lass, conf, convuls; 

blurred vision; dysp; abdom pain, nau, vomit 

TO: Eyes, skin, resp sys, CNS, CVS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

Aldrin Formula: 

C12H8Cl6

CAS#: 

309-00-2 

RTECS#: 

IO2100000 

IDLH: 

Ca [25 mg/m3] 

Conversion: DOT: 2761 151 

Synonyms/Trade Names: HHDN, Octalene, 

1,2,3,4,10,10-Hexachloro-1,4,4a,5,8,8a-hexahydro-endo-1,4-exo-5,8-dimethanonaphthalene 

Exposure Limits: 

NIOSH REL: Ca 

 TWA 0.25 mg/m3

 [skin] 

 See Appendix A 

OSHA PEL: TWA 0.25 mg/m3

 [skin] 

Physical Description: Colorless to dark-brown crystalline solid with a mild chemical 

odor. [Note: Formerly used as an insecticide.] 

Measurement Methods 

(see Table 1): 

NIOSH 5502 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam/Daily 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Chemical & Physical Properties: 

MW: 364.9 

BP: Decomposes 

Sol: 0.003% 

Fl.P: NA 

IP: ? 

Sp.Gr: 1.60 

VP: 0.00008 mmHg 

MLT: 219°F 

UEL: NA 

LEL: NA 

Noncombustible Solid, but may be 

dissolved in flammable liquids. Incompatibilities and Reactivities: Concentrated mineral acids, 

active metals, acid catalysts, acid oxidizing agents, phenol 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Head, dizz; nau, vomit, mal; myoclonic jerks of limbs; clonic, 

tonic convuls; coma; hema, azotemia; [carc] 

TO: CNS, liver, kidneys, skin [in animals: tumors of the lungs, liver, 

thyroid & adrenal glands] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

9
A 

Allyl alcohol Formula: 

CH2=CHCH2OH 

CAS#: 

107-18-6 

RTECS#: 

BA5075000 

IDLH: 

20 ppm 

Conversion: 1 ppm = 2.38 mg/m3 DOT: 1098 131 

Synonyms/Trade Names: AA, Allylic alcohol, Propenol, 1-Propen-3-ol, 2-Propenol, Vinyl carbinol 

Exposure Limits: 

NIOSH REL: TWA 2 ppm (5 mg/m3) 

 ST 4 ppm (10 mg/m3) [skin] 

OSHA PEL†: TWA 2 ppm (5 mg/m3

) [skin] 

Physical Description: Colorless liquid with a pungent, mustard-like odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1402, 1405 

Chemical & Physical Properties: 

MW: 58.1 

BP: 205°F 

Sol: Miscible 

Fl.P: 70°F 

IP: 9.63 eV 

Sp.Gr: 0.85 

VP: 17 mmHg 

FRZ: -200°F 

UEL: 18.0% 

LEL: 2.5% 

Class IB Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Provide: Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

20 ppm: Sa:Cf*/PaprOv*/CcrFOv/ 

 GmFOv/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, acids, carbon tetrachloride 

[Note: Polymerization may be caused by elevated temperatures, oxidizers, or peroxides.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Eye irrit, tissue damage; irrit upper resp sys, skin; pulm edema 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

Allyl chloride Formula: 

CH2=CHCH2Cl 

CAS#: 

107-05-1 

RTECS#: 

UC7350000 

IDLH: 

250 ppm 

Conversion: 1 ppm = 3.13 mg/m3 DOT: 1100 131 

Synonyms/Trade Names: 3-Chloropropene, 1-Chloro-2-propene, 3-Chloropropylene 

Exposure Limits: 

NIOSH REL: TWA 1 ppm (3 mg/m3

) 

 ST 2 ppm (6 mg/m3

) 

OSHA PEL†: TWA 1 ppm (3 mg/m3

) 

Physical Description: Colorless, brown, yellow, or purple liquid with a pungent, 

unpleasant odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1000 

OSHA 7 

Chemical & Physical Properties: 

MW: 76.5 

BP: 113°F 

Sol: 0.4% 

Fl.P: -25°F 

IP: 10.05 eV 

Sp.Gr: 0.94 

VP: 295 mmHg 

MLT: -210°F 

UEL: 11.1% 

LEL: 2.9% 

Class IB Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Provide: Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

25 ppm: Sa:Cf* 

50 ppm: ScbaF/SaF 

250 ppm: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, acids, amines, iron & aluminum chlorides, magnesium, zinc 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, nose, muc memb; pulm edema; in animals: liver, 

kidney inj 

TO: Eyes, skin, resp sys, liver, kidneys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

10
A 

Allyl glycidyl ether Formula: 

C6H10O2

CAS#: 

106-92-3 

RTECS#: 

RR0875000 

IDLH: 

50 ppm 

Conversion: 1 ppm = 4.67 mg/m3 DOT: 2219 129 

Synonyms/Trade Names: AGE, 1-Allyloxy-2,3-epoxypropane, Glycidyl allyl ether, [(2-Propenyloxy)methyl] oxirane 

Exposure Limits: 

NIOSH REL: TWA 5 ppm (22 mg/m3) [skin] 

 ST 10 ppm (44 mg/m3) 

OSHA PEL†: C 10 ppm (45 mg/m3

) 

Physical Description: Colorless liquid with a pleasant odor. 

Measurement Methods 

(see Table 1): 

NIOSH 2545 

Chemical & Physical 

Properties: 

MW: 114.2 

BP: 309°F 

Sol: 14% 

Fl.P: 135°F 

IP: ? 

Sp.Gr: 0.97 

VP: 2 mmHg 

FRZ: -148°F [forms glass] 

UEL: ? 

LEL: ? 

Class II Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

50 ppm: CcrOv/PaprOv/ 

 GmFOv/Sa/ScbaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, nose, resp sys; derm; pulm edema; narco; 

possible hemato, repro effects 

TO: Eyes, skin, resp sys, blood, repro sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush prompt 

Breath: Resp support 

Swallow: Medical attention immed 

Allyl propyl disulfide Formula: 

H2C=CHCH2S2CH2CH2CH3

CAS#: 

2179-59-1 

RTECS#: 

JO0350000 

IDLH: 

N.D. 

Conversion: 1 ppm = 6.07 mg/m3 DOT: 

Synonyms/Trade Names: 4,5-Dithia-1-octene, Onion oil, 2-Propenyl propyl disulfide, Propyl allyl disulfide 

Exposure Limits: 

NIOSH REL: TWA 2 ppm (12 mg/m3

) 

 ST 3 ppm (18 mg/m3

) 

OSHA PEL†: TWA 2 ppm (12 mg/m3

) 

Physical Description: Pale-yellow liquid with a strong & irritating onion-like odor. 

[Note: The chief volatile component of onion oil.] 

Measurement Methods 

(see Table 1): 

OSHA PV2086 

Chemical & Physical Properties: 

MW: 148.3 

BP: ? 

Sol: Insoluble 

Fl.P: ? 

IP: ? 

Sp.Gr(59°F): 0.93 

VP: ? 

FRZ: 5°F 

UEL: ? 

LEL: ? 

Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: Prevent eye contact 

Wash skin: N.R. 

Remove: When wet or contam 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, nose, resp sys; lac 

TO: Eyes, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

11
A α-Alumina Formula: 

Al2O3

CAS#: 

1344-28-1 

RTECS#: 

BD1200000 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: Alumina, Aluminum oxide, Aluminum trioxide [Note: α-Alumina is the main component 

of technical grade alumina. Corundum is natural Al2O3. Emery is an impure crystalline variety of Al2O3.] 

Exposure Limits: 

NIOSH REL: See Appendix D 

OSHA PEL†: TWA 15 mg/m3

 (total) 

 TWA 5 mg/m3

 (resp) 

Physical Description: White, odorless, crystalline powder. 

Measurement Methods 

(see Table 1): 

NIOSH 0500, 0600 

OSHA ID109SG, ID198SG

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Chemical & Physical Properties: 

MW: 101.9 

BP: 5396°F 

Sol: Insoluble 

Fl.P: NA 

IP: NA 

Sp.Gr: 4.0 

VP: 0 mmHg (approx) 

MLT: 3632°F 

UEL: NA 

LEL: NA 

Noncombustible solid, but dusts may 

form explosive mixtures in air. 

Incompatibilities and Reactivities: Chlorine trifluoride, hot chlorinated 

rubber, acids, oxidizers [Note: Hydrogen gas may be formed when finely 

divided iron contacts moisture during crushing & milling operations.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, resp sys 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Blot/brush away 

Breath: Fresh air 

Swallow: Medical attention immed 

Aluminum Formula: 

Al 

CAS#: 

7429-90-5 

RTECS#: 

BD0330000 

IDLH: 

N.D. 

Conversion: DOT: 1309 170 (powder, coated); 1396 138 (powder, uncoated); 

9260 169 (molten) 

Synonyms/Trade Names: Aluminium, Aluminum metal, Aluminum powder, Elemental aluminum 

Exposure Limits: 

NIOSH REL: TWA 10 mg/m3

 (total) 

 TWA 5 mg/m3

 (resp) 

OSHA PEL: TWA 15 mg/m3

 (total) 

 TWA 5 mg/m3

 (resp) 

Physical Description: Silvery-white, malleable, ductile, odorless metal. 

Measurement Methods 

(see Table 1): 

NIOSH 7013, 7300, 7301, 7303 

OSHA ID121 

Chemical & Physical Properties: 

MW: 27.0 

BP: 4221°F 

Sol: Insoluble 

Fl.P: NA 

IP: NA 

Sp.Gr: 2.70 

VP: 0 mmHg (approx) 

MLT: 1220°F 

UEL: NA 

LEL: NA 

Combustible Solid, finely divided dust is 

easily ignited; may cause explosions. 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Strong oxidizers & acids, halogenated hydrocarbons 

[Note: Corrodes in contact with acids & other metals. Ignition may occur if powders are mixed with halogens, 

carbon disulfide, or methyl chloride.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con 

SY: Irrit eyes, skin, resp sys 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Breath: Fresh air 

12
A Aluminum (pyro powders and 

welding fumes, as Al) 

Formula: CAS#: RTECS#: IDLH: 

N.D. 

Conversion: DOT: 1383 135 (powder, pyrophoric) 

Synonyms/Trade Names: Synonyms vary depending upon the specific aluminum compound. 

Exposure Limits: 

NIOSH REL: TWA 5 mg/m3

OSHA PEL†: none 

Physical Description: Appearance and odor vary depending upon the specific 

aluminum compound. 

Measurement Methods 

(see Table 1): 

NIOSH 7300, 7301, 7303 

Chemical & Physical 

Properties: 

Properties vary depending upon 

the specific aluminum compound.

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Varies 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit skin, resp sys; pulm fib 

TO: Skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

Aluminum (soluble salts and 

alkyls, as Al) 

Formula: CAS#: RTECS#: IDLH: 

N.D. 

Conversion: DOT: 3051 135 (Aluminum alkyls) 

Synonyms/Trade Names: Synonyms vary depending upon the specific aluminum compound. 

Exposure Limits: 

NIOSH REL: TWA 2 mg/m3

OSHA PEL†: none 

Physical Description: Appearance and odor vary depending upon the specific 

aluminum compound. 

Measurement Methods 

(see Table 1): 

NIOSH 7013, 7300, 7301, 7303 

OSHA ID121 

Chemical & Physical 

Properties: 

Properties vary depending upon 

the specific aluminum compound.

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Varies 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit skin, resp sys; skin burns 

TO: Skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

13
A 

4-Aminodiphenyl Formula: 

C6H5C6H4NH2

CAS#: 

92-67-1 

RTECS#: 

DU8925000 

IDLH: 

Ca [N.D.] 

Conversion: DOT: 

Synonyms/Trade Names: 4-Aminobiphenyl, p-Aminobiphenyl, p-Aminodiphenyl, 4-Phenylaniline 

Exposure Limits: 

NIOSH REL: Ca 

 See Appendix A 

OSHA PEL: [1910.1011] See Appendix B 

Physical Description: Colorless crystals with a floral odor. 

[Note: Turns purple on contact with air.] 

Measurement Methods 

(see Table 1): 

NIOSH P&CAM269 (II-4) 

OSHA 93 

Chemical & Physical Properties: 

MW: 169.2 

BP: 576°F 

Sol: Slight 

Fl.P: ? 

IP: ? 

Sp.Gr: 1.16 

VP(227°F): 1 mmHg 

MLT: 127°F 

UEL: ? 

LEL: ? 

Combustible Solid, but must be 

preheated before ignition possible. 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam/Daily 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

See Appendix E (page 351) 

Incompatibilities and Reactivities: Oxidized by air 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Head, dizz; drow, dysp; ataxia, lass; methemo; urinary 

burning; acute hemorrhagic cystitis; [carc] 

TO: Bladder, skin [bladder cancer] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

2-Aminopyridine Formula: 

NH2C5H4N 

CAS#: 

504-29-0 

RTECS#: 

US1575000 

IDLH: 

5 ppm 

Conversion: 1 ppm = 3.85 mg/m3 DOT: 2671 153 

Synonyms/Trade Names: α-Aminopyridine, α-Pyridylamine 

Exposure Limits: 

NIOSH REL: TWA 0.5 ppm (2 mg/m3) 

OSHA PEL: TWA 0.5 ppm (2 mg/m3) 

Physical Description: White powder, leaflets, or crystals with a characteristic odor. 

Measurement Methods 

(see Table 1): 

NIOSH S158 (II-4) 

Chemical & Physical 

Properties: 

MW: 94.1 

BP: 411°F 

Sol: >100% 

Fl.P: 154°F 

IP: 8.00 eV 

Sp.Gr: ? 

VP(77°F): 0.8 mmHg 

MLT: 137°F 

UEL: ? 

LEL: ? 

Combustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Provide: Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

5 ppm: Sa*/ScbaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, nose, throat; head, dizz; excitement; nau; high BP; 

resp distress; lass; convuls; stupor 

TO: CNS, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

14
A 

Amitrole Formula: 

C2H4N4

CAS#: 

61-82-5 

RTECS#: 

XZ3850000 

IDLH: 

Ca [N.D.] 

Conversion: DOT: 

Synonyms/Trade Names: Aminotriazole; 3-Aminotriazole; 2-Amino-1,3,4-triazole; 3-Amino-1,2,4-triazole 

Exposure Limits: 

NIOSH REL: Ca OSHA PEL†: none 

 TWA 0.2 mg/m3

 

 See Appendix A 

Physical Description: Colorless to white, crystalline powder. [herbicide] 

[Note: Odorless when pure.] 

Measurement Methods 

(see Table 1): 

NIOSH 0500 

OSHA PV2006 

Personal Protection/Sanitation

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: Daily 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Chemical & Physical Properties: 

MW: 84.1 

BP: ? 

Sol(77°F): 28% 

Fl.P: NA 

IP: ? 

Sp.Gr: 1.14 

VP: <0.000008 mmHg 

MLT: 318°F 

UEL: NA 

LEL: NA 

Noncombustible Solid, but may be 

dissolved in flammable liquids. 

Incompatibilities and Reactivities: Light (decomposes), strong oxidizers 

[Note: Corrosive to iron, aluminum & copper.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin; dysp, musc spasms, ataxia, anor, salv, incr body 

temperature; lass, skin dryness, depres (thyroid func suppression) 

TO: Eyes, skin, thyroid [in animals: liver, thyroid & pituitary gland tumors] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

Ammonia Formula: 

NH3

CAS#: 

7664-41-7 

RTECS#: 

BO0875000 

IDLH: 

300 ppm 

Conversion: 1 ppm = 0.70 mg/m3 DOT: 1005 125 (anhydrous); 2672 154 (10-35% solution); 

2073 125 (>35-50% solution); 1005 125 (>50% solution) 

Synonyms/Trade Names: Anhydrous ammonia, Aqua ammonia, Aqueous ammonia 

[Note: Often used in an aqueous solution.] 

Exposure Limits: 

NIOSH REL: TWA 25 ppm (18 mg/m3

) OSHA PEL†: TWA 50 ppm (35 mg/m3) 

 ST 35 ppm (27 mg/m3

) 

Physical Description: Colorless gas with a pungent, suffocating odor. 

[Note: Shipped as a liquefied compressed gas. Easily liquefied under pressure.] 

Measurement Methods 

(see Table 1): 

NIOSH 3800, 6015, 6016 

OSHA ID188 

Chemical & Physical Properties: 

MW: 17.0 

BP: -28°F 

Sol: 34% 

Fl.P: NA (Gas) 

IP: 10.18 eV 

RGasD: 0.60 

VP: 8.5 atm 

FRZ: -108°F 

UEL: 28% 

LEL: 15% 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam (solution)

Remove: When wet or contam 

 (solution) 

Change: N.R. 

Provide: Eyewash (>10%) 

 Quick drench (>10%) 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

250 ppm: CcrS*/Sa* 

300 ppm: Sa:Cf*/PaprS*/CcrFS/ 

 GmFS/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFS/ScbaE 

[Note: Although NH3 does not meet the DOT definition of a 

Flammable Gas (for labeling purposes), it should be treated as one.] 

Incompatibilities and Reactivities: Strong oxidizers, acids, halogens, salts of silver & zinc 

 [Note: Corrosive to copper & galvanized surfaces.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing (solution), Con (solution/liquid) 

SY: Irrit eyes, nose, throat; dysp, wheez, chest pain; pulm 

edema; pink frothy sputum; skin burns, vesic; liquid: frostbite 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed (solution/liquid) 

Skin: Water flush immed (solution/liquid) 

Breath: Resp support 

Swallow: Medical attention immed (solution) 

15
A 

Ammonium chloride fume Formula: 

NH4Cl 

CAS#: 

12125-02-9 

RTECS#: 

BP4550000 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: Ammonium chloride, Ammonium muriate fume, Sal ammoniac fume 

Exposure Limits: 

NIOSH REL: TWA 10 mg/m3 

 ST 20 mg/m3

OSHA PEL†: none 

Physical Description: Finely divided, odorless, white particulate dispersed in air. 

Measurement Methods 

(see Table 1): 

OSHA ID188 

Chemical & Physical Properties: 

MW: 53.5 

BP: Sublimes 

Sol: 37% 

Fl.P: NA 

IP: NA 

Sp.Gr: 1.53 

VP(321°F): 1 mmHg 

MLT: 662°F (Sublimes) 

UEL: NA 

LEL: NA 

Noncombustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Alkalis & their carbonates, lead & silver salts, strong oxidizers, ammonium 

nitrate, potassium chlorate, bromine trifluoride [Note: Corrodes most metals at high (i.e., fire) temperatures.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con 

SY: Irrit eyes, skin, resp sys; cough, dysp, pulm sens 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Ammonium sulfamate Formula: 

NH4OSO2NH2

CAS#: 

7773-06-0 

RTECS#: 

WO6125000 

IDLH: 

1500 mg/m3

Conversion: DOT: 

Synonyms/Trade Names: Ammate herbicide, Ammonium amidosulfonate, AMS, 

Monoammonium salt of sulfamic acid, Sulfamate 

Exposure Limits: 

NIOSH REL: TWA 10 mg/m3

 (total) 

 TWA 5 mg/m3

 (resp) 

OSHA PEL†: TWA 15 mg/m3

 (total) 

 TWA 5 mg/m3

 (resp) 

Physical Description: Colorless to white crystalline, odorless solid. [herbicide] 

Measurement Methods 

(see Table 1): 

NIOSH S348 (II-5) 

Chemical & Physical Properties: 

MW: 114.1 

BP: 320°F (Decomposes) 

Sol: 200% 

Fl.P: NA 

IP: ? 

Sp.Gr: 1.77 

VP: 0 mmHg (approx) 

MLT: 268°F 

UEL: NA 

LEL: NA 

Noncombustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

50 mg/m3

: Qm 

100 mg/m3

: 95XQ/Sa 

250 mg/m3: Sa:Cf/PaprHie 

500 mg/m3

: SaT:Cf/PaprTHie/100F/ 

 ScbaF/SaF 

1500 mg/m3

: Sa:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Incompatibilities and Reactivities: Acids, hot water 

[Note: Elevated temperatures cause a highly exothermic reaction with water.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con 

SY: Irrit eyes, nose, throat; cough, dysp 

TO: Eyes, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 

16
A 

n-Amyl acetate Formula: 

CH3COO[CH2]4CH3

CAS#: 

628-63-7 

RTECS#: 

AJ9250000 

IDLH: 

1000 ppm 

Conversion: 1 ppm = 5.33 mg/m3 DOT: 1104 129 

Synonyms/Trade Names: Amyl acetic ester, Amyl acetic ether, 1-Pentanol acetate, Pentyl ester of acetic acid, 

Primary amyl acetate 

Exposure Limits: 

NIOSH REL: TWA 100 ppm (525 mg/m3

) 

OSHA PEL: TWA 100 ppm (525 mg/m3) 

Physical Description: Colorless liquid with a persistent banana-like odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1450, 2549 

OSHA 7 

Chemical & Physical 

Properties: 

MW: 130.2 

BP: 301°F 

Sol: 0.2% 

Fl.P: 77°F 

IP: ? 

Sp.Gr: 0.88 

VP: 4 mmHg 

FRZ: -95°F 

UEL: 7.5% 

LEL: 1.1% 

Class IC Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

1000 ppm: CcrOv*/GmFOv/PaprOv*/ 

 Sa*/ScbaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Nitrates; strong oxidizers, alkalis & acids 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, nose; derm; possible CNS depres, narco 

TO: Eyes, skin, resp sys, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush prompt 

Breath: Resp support 

Swallow: Medical attention immed 

sec-Amyl acetate Formula: 

CH3COOCH(CH3)C3H7

CAS#: 

626-38-0 

RTECS#: 

AJ2100000 

IDLH: 

1000 ppm 

Conversion: 1 ppm = 5.33 mg/m3 DOT: 1104 129 

Synonyms/Trade Names: 1-Methylbutyl acetate, 2-Pentanol acetate, 2-Pentyl ester of acetic acid 

Exposure Limits: 

NIOSH REL: TWA 125 ppm (650 mg/m3

) 

OSHA PEL: TWA 125 ppm (650 mg/m3

) 

Physical Description: Colorless liquid with a mild odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1450, 2549 

OSHA 7 

Chemical & Physical 

Properties: 

MW: 130.2 

BP: 249°F 

Sol: Slight 

Fl.P: 89°F 

IP: ? 

Sp.Gr: 0.87 

VP: 7 mmHg 

FRZ: -109°F 

UEL: 7.5% 

LEL: 1% 

Class IC Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

1000 ppm: CcrOv*/GmFOv/PaprOv*/ 

 Sa*/ScbaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Nitrates; strong oxidizers, alkalis & acids 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, nose; narco; derm; possible kidney, liver inj; 

possible CNS depres 

TO: Eyes, skin, resp sys, kidneys, liver, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush prompt 

Breath: Resp support 

Swallow: Medical attention immed 

17
A 

Aniline (and homologs) Formula: 

C6H5NH2

CAS#: 

62-53-3 

RTECS#: 

BW6650000 

IDLH: 

Ca [100 ppm] 

Conversion: 1 ppm = 3.81 mg/m3 DOT: 1547 153 

Synonyms/Trade Names: Aminobenzene, Aniline oil, Benzenamine, Phenylamine 

Exposure Limits: 

NIOSH REL: Ca 

 See Appendix A 

OSHA PEL†: TWA 5 ppm (19 mg/m3

) [skin] 

Physical Description: Colorless to brown, oily liquid with an aromatic amine-like odor. 

[Note: A solid below 21°F.] 

Measurement Methods 

(see Table 1): 

NIOSH 2002, 2017, 8317 

OSHA PV2079 

Chemical & Physical 

Properties: 

MW: 93.1 

BP: 363°F 

Sol: 4% 

Fl.P: 158°F 

IP: 7.70 eV 

Sp.Gr: 1.02 

VP: 0.6 mmHg 

FRZ: 21°F 

UEL: 11% 

LEL: 1.3% 

Class IIIA Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, strong acids, toluene diisocyanate, alkalis 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Head, lass, dizz; cyan; ataxia; dysp on effort; tacar; irrit 

eyes; methemo; cirr; [carc] 

TO: Blood, CVS, eyes, liver, kidneys, resp sys [bladder cancer] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 

o-Anisidine Formula: 

NH2C6H4OCH3

CAS#: 

90-04-0 

RTECS#: 

BZ5410000 

IDLH: 

Ca [50 mg/m3]

Conversion: DOT: 2431 153 

Synonyms/Trade Names: ortho-Aminoanisole, 2-Anisidine, o-Methoxyaniline 

[Note: o-Anisidine has been used as a basis for many dyes.] 

Exposure Limits: 

NIOSH REL: Ca 

 0.5 mg/m3

 [skin] 

 See Appendix A 

OSHA PEL: TWA 0.5 mg/m3

 [skin] 

Measurement Methods 

(see Table 1): 

NIOSH 2514 

Physical Description: Red or yellow, oily liquid with an amine-like odor. [Note: A solid below 41°F.] 

Chemical & Physical Properties: 

MW: 123.2 

BP: 437°F 

Sol(77°F): 1% 

Fl.P(oc): 244°F 

IP: 7.44 eV 

Sp.Gr: 1.10 

VP: <0.1 mmHg 

FRZ: 41°F 

UEL: ? 

LEL: ? 

Class IIIB Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Head, dizz; cyan; RBC Heinz bodies; [carc] 

TO: Blood, kidneys, liver, CVS, CNS [in animals: tumors of the 

thyroid gland, bladder & kidneys] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

18
A 

p-Anisidine Formula: 

NH2C6H4OCH3

CAS#: 

104-94-9 

RTECS#: 

BZ5450000 

IDLH: 

50 mg/m3

Conversion: DOT: 2431 153 

Synonyms/Trade Names: para-Aminoanisole, 4-Anisidine, p-Methoxyaniline 

Exposure Limits: 

NIOSH REL: TWA 0.5 mg/m3 [skin] 

OSHA PEL: TWA 0.5 mg/m3

 [skin] 

Physical Description: Yellow to brown, crystalline solid with an amine-like odor. 

Measurement Methods 

(see Table 1): 

NIOSH 2514 

Chemical & Physical 

Properties: 

MW: 123.2 

BP: 475°F 

Sol: Moderate 

Fl.P: ? 

IP: 7.44 eV 

Sp.Gr: 1.07 

VP(77°F): 0.006 mmHg 

MLT: 135°F 

UEL: ? 

LEL: ? 

Combustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Provide: Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

5 mg/m3

: 95XQ/Sa 

12.5 mg/m3: Sa:Cf/PaprHie 

25 mg/m3

: 100F/PaprTHie*/ScbaF/SaF 

50 mg/m3

: Sa:Pd,Pp* 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Head, dizz; cyan; RBC Heinz bodies 

TO: Blood, kidneys, liver, CVS, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

Antimony Formula: 

Sb 

CAS#: 

7440-36-0 

RTECS#: 

CC4025000 

IDLH: 

50 mg/m3 (as Sb) 

Conversion: DOT: 1549 157 (inorganic compounds, n.o.s.); 2871 170 (powder); 

3141 157 (inorganic liquid compounds, n.o.s.) 

Synonyms/Trade Names: Antimony metal, Antimony powder, Stibium 

Exposure Limits: 

NIOSH REL*: TWA 0.5 mg/m3

 

OSHA PEL*: TWA 0.5 mg/m3

 

[*Note: The REL and PEL also apply to other antimony compounds (as Sb).] 

Physical Description: Silver-white, lustrous, hard, brittle solid; scale-like crystals; 

or a dark-gray, lustrous powder. 

Measurement Methods 

(see Table 1): 

NIOSH 7301, 7303, 

 P&CAM 261 (II-4) 

OSHA ID121, ID125G, ID206 

Chemical & Physical 

Properties: 

MW: 121.8 

BP: 2975°F 

Sol: Insoluble 

Fl.P: NA 

IP: NA 

Sp.Gr: 6.69 

VP: 0 mmHg (approx) 

MLT: 1166°F 

UEL: NA 

LEL: NA 

Personal Protection/Sanitation

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

5 mg/m3

: 95XQ/Sa 

12.5 mg/m3

: Sa:Cf/PaprHie 

25 mg/m3: 100F/SaT:Cf/PaprTHie/ScbaF/SaF 

50 mg/m3

: Sa:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Noncombustible Solid in bulk form, but a moderate explosion hazard in the form of dust when exposed to flame.

Incompatibilities and Reactivities: Strong oxidizers, acids, halogenated acids 

[Note: Stibine is formed when antimony is exposed to nascent (freshly formed) hydrogen.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, nose, throat, mouth; cough; dizz; head; nau, 

vomit, diarr; stomach cramps; insom; anor; unable to smell properly 

TO: Eyes, skin, resp sys, CVS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

19
A 

ANTU Formula: 

C10H7NHC(NH2)S 

CAS#: 

86-88-4 

RTECS#: 

YT9275000 

IDLH: 

100 mg/m3

Conversion: DOT: 1651 153 

Synonyms/Trade Names: α-Naphthyl thiocarbamide, 1-Naphthyl thiourea, α-Naphthyl thiourea 

Exposure Limits: 

NIOSH REL: TWA 0.3 mg/m3

 

OSHA PEL: TWA 0.3 mg/m3

Physical Description: White crystalline or gray, odorless powder. [rodenticide] 

Measurement Methods 

(see Table 1): 

NIOSH S276 (II-5) 

Chemical & Physical 

Properties: 

MW: 202.3 

BP: Decomposes 

Sol: 0.06% 

Fl.P: NA 

IP: ? 

Sp.Gr: ? 

VP: Low 

MLT: 388°F 

UEL: NA 

LEL: NA 

Noncombustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

3 mg/m3

: CcrOv95/Sa 

7.5 mg/m3

: Sa:Cf/PaprOvHie 

15 mg/m3: CcrFOv100/GmFOv100/ 

 PaprTOvHie/SaT:Cf/ScbaF/SaF 

100 mg/m3

: Sa:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, silver nitrate 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing 

SY: After ingestion of large doses: vomit, dysp, cyan, coarse pulm 

rales; liver damage 

TO: Resp sys, blood, liver 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 

Arsenic (inorganic 

compounds, as As) 

Formula: 

As (metal) 

CAS#: 

7440-38-2 (metal) 

RTECS#: 

CG0525000 (metal) 

IDLH: 

Ca [5 mg/m3

 (as As)]

Conversion: DOT: 1558 152 (metal); 1562 152 (dust) 

Synonyms/Trade Names: Arsenic metal: Arsenia 

Other synonyms vary depending upon the specific As compound. [Note: OSHA considers “Inorganic Arsenic” 

to mean copper acetoarsenite & all inorganic compounds containing arsenic except ARSINE.] 

Exposure Limits: 

NIOSH REL: Ca 

 C 0.002 mg/m3

 [15-minute] 

 See Appendix A 

OSHA PEL: [1910.1018] TWA 0.010 mg/m3

Physical Description: Metal: Silver-gray or tin-white, brittle, odorless solid. 

Measurement Methods 

(see Table 1): 

NIOSH 7300, 7301, 7303, 

 9102, 7900 

OSHA ID105 

Chemical & Physical Properties: 

MW: 74.9 

BP: Sublimes 

Sol: Insoluble 

Fl.P: NA 

IP: NA 

Sp.Gr: 5.73 (metal) 

VP: 0 mmHg (approx) 

MLT: 1135°F (Sublimes) 

UEL: NA 

LEL: NA 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam/Daily 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFAg100/ScbaE 

See Appendix E (page 351) 

Metal: Noncombustible Solid in bulk form, but a slight explosion hazard in the form of dust when exposed to flame.

Incompatibilities and Reactivities: Strong oxidizers, bromine azide 

[Note: Hydrogen gas can react with inorganic arsenic to form the highly toxic gas arsine.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Con, Ing 

SY: Ulceration of nasal septum, derm, GI disturbances, peri neur, 

resp irrit, hyperpig of skin, [carc] 

TO: Liver, kidneys, skin, lungs, lymphatic sys [lung & lymphatic cancer] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

20
A 

Arsenic (organic compounds, as As) Formula: CAS#: RTECS#: IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: Synonyms vary depending upon the specific organic arsenic compound. 

Exposure Limits: 

NIOSH REL: none 

OSHA PEL: TWA 0.5 mg/m3

Physical Description: Appearance and odor vary depending upon the specific 

organic arsenic compound. 

Measurement Methods 

(see Table 1): 

NIOSH 5022 

Chemical & Physical 

Properties: 

Properties vary depending 

upon the specific organic 

arsenic compound. 

Personal Protection/Sanitation 

(see Table 2): 

Recommendations regarding personal 

protective clothing vary depending upon 

the specific compound. 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Varies 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: In animals: irrit skin, possible derm; resp distress; diarr; 

kidney damage; musc tremor, convuls; possible GI tract, repro 

effects; possible liver damage 

TO: Skin, resp sys, kidneys, CNS, liver, GI tract, repro sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

Arsine Formula: 

AsH3

CAS#: 

7784-42-1 

RTECS#: 

CG6475000 

IDLH: 

Ca [3 ppm] 

Conversion: 1 ppm = 3.19 mg/m3 DOT: 2188 119 

Synonyms/Trade Names: Arsenic hydride, Arsenic trihydride, Arseniuretted hydrogen, Arsenous hydride, 

Hydrogen arsenide 

Exposure Limits: 

NIOSH REL: Ca 

 C 0.002 mg/m3

 [15-minute] 

 See Appendix A 

OSHA PEL: TWA 0.05 ppm (0.2 mg/m3

) 

Physical Description: Colorless gas with a mild, garlic-like odor. 

[Note: Shipped as a liquefied compressed gas.] 

Measurement Methods 

(see Table 1): 

NIOSH 6001 

OSHA ID105 

Chemical & Physical Properties: 

MW: 78.0 

BP: -81°F 

Sol: 20% 

Fl.P: NA (Gas) 

IP: 9.89 eV 

RGasD: 2.69 

VP(70°F): 14.9 atm 

FRZ: -179°F 

UEL: 78% 

LEL: 5.1% 

Flammable Gas 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Frostbite 

Eyes: Frostbite 

Wash skin: N.R. 

Remove: When wet (flamm) 

Change: N.R. 

Provide: Frostbite wash 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFS/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, chlorine, nitric acid 

[Note: Decomposes above 446°F. There is a high potential for the generation of arsine gas when inorganic 

arsenic is exposed to nascent (freshly formed) hydrogen.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con (liquid) 

SY: Head, mal, lass, dizz; dysp; abdom, back pain; nau, vomit; 

bronze skin; hema; jaun; peri neur; liquid: frostbite; [carc] 

TO: Blood, kidneys, liver [lung & lymphatic cancer] 

First Aid (see Table 6): 

Eye: Frostbite 

Skin: Frostbite 

Breath: Resp support 

21
A 

Asbestos Formula: 

Hydrated mineral silicates 

CAS#: 

1332-21-4 

RTECS#: 

CI6475000 

IDLH: 

Ca [N.D.] 

Conversion: DOT: 2212 171 (blue, brown); 2590 171 (white) 

Synonyms/Trade Names: Actinolite, Actinolite asbestos, Amosite (cummingtonite-grunerite), Anthophyllite, 

Anthophyllite asbestos, Chrysotile, Crocidolite (Riebeckite), Tremolite, Tremolite asbestos 

Exposure Limits: 

NIOSH REL: Ca 

 See Appendix A 

 See Appendix C 

OSHA PEL: [1910.1001] [1926.1101] See Appendix C 

Physical Description: White or greenish (chrysotile), blue (crocidolite), or gray-green 

(amosite) fibrous, odorless solids. 

Measurement Methods 

(see Table 1): 

NIOSH 7400, 7402 

OSHA ID160, ID191 

Chemical & Physical Properties: 

MW: Varies 

BP: Decomposes 

Sol: Insoluble 

Fl.P: NA 

IP: NA 

Sp.Gr: ? 

VP: 0 mmHg (approx) 

MLT: 1112°F (Decomposes) 

UEL: NA 

LEL: NA 

Noncombustible Solids 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: Daily 

Remove: N.R. 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

See Appendix E (page 351) 

Incompatibilities and Reactivities: None reported 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Asbestosis (chronic exposure): dysp, interstitial fib, restricted pulm 

function, finger clubbing; irrit eyes; [carc] 

TO: Resp sys, eyes [lung cancer] 

First Aid (see Table 6): 

Eye: Irr immed 

Breath: Fresh air 

Asphalt fumes Formula: CAS#: 

8052-42-4 

RTECS#: 

CI9900000 

IDLH: 

Ca [N.D.] 

Conversion: DOT: 1999 130 (asphalt) 

Synonyms/Trade Names: Asphalt: Asphaltum, Bitumen (European term), Petroleum asphalt, Petroleum bitumen, 

Road asphalt, Roofing asphalt 

Exposure Limits: 

NIOSH REL: Ca 

 C 5 mg/m3

 [15-minute] 

 See Appendix A 

 See Appendix C 

OSHA PEL: none 

Measurement Methods 

(see Table 1): 

NIOSH 5042 

Physical Description: Fumes generated during the production or application of asphalt (a dark-brown to black 

cement-like substance manufactured by the vacuum distillation of crude petroleum oil). 

Chemical & Physical 

Properties: 

Properties vary depending upon 

the specific asphalt formulation or 

mixture. 

Asphalt: Combustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: Daily 

Remove: N.R. 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Incompatibilities and Reactivities: None reported [Note: Asphalt becomes molten at about 200°F.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Con 

SY: Irrit eyes, resp sys; [carc] 

TO: Eyes, resp sys [in animals: skin tumors] 

First Aid (see Table 6): 

Eye: Irr immed 

Breath: Resp support 

22
A 

Atrazine Formula: 

C8H14ClN5

CAS#: 

1912-24-9 

RTECS#: 

XY5600000 

IDLH: 

N.D. 

Conversion: DOT: 2763 151 (triazine pesticide) 

Synonyms/Trade Names: 2-Chloro-4-ethylamino-6-isopropylamino-s-triazine; 

6-Chloro-N-ethyl-N'-(1-methylethyl)-1,3,5-triazine-2,4-diamine 

Exposure Limits: 

NIOSH REL: TWA 5 mg/m3

OSHA PEL†: none 

Physical Description: Colorless or white, odorless, crystalline powder. [herbicide] 

Measurement Methods 

(see Table 1): 

NIOSH 5602, 8315 

Chemical & Physical Properties: 

MW: 215.7 

BP: Decomposes 

Sol: 0.003% 

Fl.P: NA 

IP: NA 

Sp.Gr: 1.19 

VP: 0.0000003 mmHg 

MLT: 340°F 

UEL: NA 

LEL: NA 

Noncombustible Solid, but may be 

mixed with flammable liquids. 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Strong acids, strong bases 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin; derm, sens skin; dysp, lass, inco, salv; 

hypothermia; liver inj 

TO: Eyes, skin, resp sys, CNS, liver 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

Azinphos-methyl Formula: 

C10H12O3PS2N3 [(CH3O)2P(S)SCH2(N3C7H4O)]

CAS#: 

86-50-0

RTECS#: 

TE1925000 

IDLH: 

10 mg/m3

Conversion: DOT: 2783 152 (organophosphorus pesticide, solid, toxic) 

Synonyms/Trade Names: O,O-Dimethyl-S-4-oxo-1,2,3-benzotriazin-3(4H)-ylmethyl phosphorodithioate; Guthion®; 

Methyl azinphos 

Exposure Limits: 

NIOSH REL: TWA 0.2 mg/m3

 [skin] 

OSHA PEL: TWA 0.2 mg/m3

 [skin] 

Physical Description: Colorless crystals or a brown, waxy solid. [insecticide] 

Measurement Methods 

(see Table 1): 

NIOSH 5600 

OSHA PV2087 

Chemical & Physical 

Properties: 

MW: 317.3 

BP: Decomposes 

Sol: 0.003% 

Fl.P: NA 

IP: ? 

Sp.Gr: 1.44 

VP: 8 x 10-9 mmHg 

MLT: 163°F 

UEL: NA 

LEL: NA 

Noncombustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Provide: Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

2 mg/m3

: CcrOv95/Sa 

5 mg/m3: Sa:Cf/PaprOvHie 

10 mg/m3

: CcrFOv100/GmFOv100/ 

 PaprTOvHie/SaT:Cf/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, acids 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Miosis; ache eyes; blurred vision, lac, rhin; head; chest tight, 

wheez, lar spasm; salv; cyan; anor; nau, vomit, diarr; sweat; 

twitch, para, convuls; low BP, card irreg 

TO: Resp sys, CNS, CVS, blood chol 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

23
Barium chloride (as Ba) Formula: 

BaCl2

CAS#: 

10361-37-2 

RTECS#: 

CQ8750000 

IDLH: 

50 mg/m3

 (as Ba)

Conversion: DOT: 1564 154 (barium compound, n.o.s.) 

Synonyms/Trade Names: Barium dichloride 

Exposure Limits: 

NIOSH REL*: TWA 0.5 mg/m3 

OSHA PEL*: TWA 0.5 mg/m3

 

[*Note: The REL and PEL also apply to other soluble barium compounds (as Ba) 

except Barium sulfate.]

Physical Description: White, odorless solid. 

Measurement Methods 

(see Table 1): 

NIOSH 7056, 7303 

OSHA ID121 

Chemical & Physical Properties: 

MW: 208.2 

BP: 2840°F 

Sol: 38% 

Fl.P: NA 

IP: ? 

Sp.Gr: 3.86 

VP: Low 

MLT: 1765°F 

UEL: NA 

LEL: NA 

Noncombustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

5 mg/m3

: 95XQ/Sa 

12.5 mg/m3

: Sa:Cf/PaprHie 

25 mg/m3

: 100F/SaT:Cf/PaprTHie/ 

 ScbaF/SaF 

50 mg/m3

: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Incompatibilities and Reactivities: Acids, oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, upper resp sys; skin burns; gastroenteritis; 

musc spasm; slow pulse, extrasystoles; hypokalemia 

TO: Eyes, skin, resp sys, heart, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

B 

Barium nitrate (as Ba) Formula: 

Ba(NO3)2

CAS#: 

10022-31-8 

RTECS#: 

CQ9625000 

IDLH: 

50 mg/m3

 (as Ba)

Conversion: DOT: 1446 141 

Synonyms/Trade Names: Barium dinitrate, Barium(II) nitrate (1:2), Barium salt of nitric acid 

Exposure Limits: 

NIOSH REL*: TWA 0.5 mg/m3

 

OSHA PEL*: TWA 0.5 mg/m3

 

[*Note: The REL and PEL also apply to other soluble barium compounds (as Ba) 

except Barium sulfate.] 

Physical Description: White, odorless solid. 

Measurement Methods 

(see Table 1): 

NIOSH 7056 

OSHA ID121 

Chemical & Physical Properties: 

MW: 261.4 

BP: Decomposes 

Sol: 9% 

Fl.P: NA 

IP: ? 

Sp.Gr: 3.24 

VP: Low 

MLT: 1094°F 

UEL: NA 

LEL: NA 

Noncombustible Solid, but will 

accelerate the burning of 

combustible materials. 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

5 mg/m3

: 95XQ/Sa 

12.5 mg/m3

: Sa:Cf/PaprHie 

25 mg/m3: 100F/SaT:Cf/PaprTHie/ 

 ScbaF/SaF 

50 mg/m3

: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Incompatibilities and Reactivities: Acids, oxidizers, aluminum-magnesium alloys, (barium dioxide + zinc) 

[Note: Contact with combustible material may cause fire.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, upper resp sys; skin burns; gastroenteritis; 

musc spasm; slow pulse, extrasystoles; hypokalemia 

TO: Eyes, skin, resp sys, heart, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

24
Barium sulfate Formula: 

BaSO4

CAS#: 

7727-43-7 

RTECS#: 

CR0600000 

IDLH: 

N.D. 

Conversion: DOT: 1564 154 (barium compound, n.o.s.) 

Synonyms/Trade Names: Artificial barite, Barite, Barium salt of sulfuric acid, Barytes (natural) 

Exposure Limits: 

NIOSH REL: TWA 10 mg/m3 (total) 

 TWA 5 mg/m3 (resp) 

OSHA PEL†: TWA 15 mg/m3

 (total) 

 TWA 5 mg/m3 (resp) 

Physical Description: White or yellowish, odorless powder. 

Measurement Methods 

(see Table 1): 

NIOSH 0500, 0600 

Chemical & Physical Properties: 

MW: 233.4 

BP: 2912°F (Decomposes) 

Sol(64°F): 0.0002% 

Fl.P: NA 

IP: NA 

Sp.Gr: 4.25-4.5 

VP: 0 mmHg (approx) 

MLT: 2876°F 

UEL: NA 

LEL: NA 

Noncombustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: Daily 

Remove: N.R. 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Phosphorus, aluminum 

[Note: Aluminum in the presence of heat can cause an explosion.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con 

SY: Irrit eyes, nose, upper resp sys; benign pneumoconiosis 

(baritosis) 

TO: Eyes, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash 

Breath: Resp support 

Swallow: Medical attention immed 

B 

Benomyl Formula: 

C14H18N4O3

CAS#: 

17804-35-2 

RTECS#: 

DD6475000 

IDLH: 

N.D. 

Conversion: DOT: 2757 151 (carbamate pesticide, solid) 

Synonyms/Trade Names: Methyl 1-(butylcarbamoyl)-2-benzimidazolecarbamate 

Exposure Limits: 

NIOSH REL: See Appendix D 

OSHA PEL†: TWA 15 mg/m3

 (total) 

 TWA 5 mg/m3

 (resp) 

Physical Description: White crystalline solid with a faint, acrid odor. [fungicide] 

[Note: Decomposes without melting above 572°F.] 

Measurement Methods 

(see Table 1): 

NIOSH 0500, 0600 

OSHA PV2107 

Chemical & Physical Properties: 

MW: 290.4 

BP: Decomposes 

Sol: 0.0004% 

Fl.P: NA 

IP: NA 

Sp.Gr: ? 

VP: <0.00001 mmHg 

MLT: >572°F (Decomposes) 

UEL: NA 

LEL: NA 

Noncombustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Heat, strong acids, strong alkalis 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, upper resp sys; skin sens; possible repro, 

terato effects 

TO: Eyes, skin, resp sys, repro sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

25
Benzene Formula: 

C6H6

CAS#: 

71-43-2 

RTECS#: 

CY1400000 

IDLH: 

Ca [500 ppm] 

Conversion: 1 ppm = 3.19 mg/m3 DOT: 1114 130 

Synonyms/Trade Names: Benzol, Phenyl hydride 

Exposure Limits: 

NIOSH REL: Ca OSHA PEL: [1910.1028] 

 TWA 0.1 ppm TWA 1 ppm 

 ST 1 ppm ST 5 ppm 

 See Appendix A See Appendix F 

Measurement Methods 

(see Table 1): 

NIOSH 1500, 1501, 3700, 3800 

OSHA 12, 1005 

Physical Description: Colorless to light-yellow liquid with an aromatic odor. [Note: A solid below 42°F.] 

Chemical & Physical Properties: 

MW: 78.1 

BP: 176°F 

Sol: 0.07% 

Fl.P: 12°F 

IP: 9.24 eV 

Sp.Gr: 0.88 

VP: 75 mmHg 

FRZ: 42°F 

UEL: 7.8% 

LEL: 1.2% 

Class IB Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

See Appendix E (page 351) 

Incompatibilities and Reactivities: Strong oxidizers, many fluorides & perchlorates, nitric acid 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, nose, resp sys; dizz; head, nau, staggered 

gait; anor, lass; derm; bone marrow depres; [carc] 

TO: Eyes, skin, resp sys, blood, CNS, bone marrow [leukemia] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

B 

Benzenethiol Formula: 

C6H5SH 

CAS#: 

108-98-5 

RTECS#: 

DC0525000 

IDLH: 

N.D. 

Conversion: 1 ppm = 4.51 mg/m3 DOT: 2337 131 

Synonyms/Trade Names: Mercaptobenzene, Phenyl mercaptan, Thiophenol 

Exposure Limits: 

NIOSH REL: C 0.1 ppm (0.5 mg/m3

) [15-minute] 

OSHA PEL†: none 

Physical Description: Water-white liquid with an offensive, garlic-like odor. 

[Note: A solid below 5°F.] 

Measurement Methods 

(see Table 1): 

OSHA PV2075 

Chemical & Physical Properties: 

MW: 110.2 

BP: 336°F 

Sol(77°F): 0.08% 

Fl.P: 132°F 

IP: 8.33 eV 

Sp.Gr: 1.08 

VP(65°F): 1 mmHg 

FRZ: 5°F 

UEL: ? 

LEL: ? 

Class II Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

1 ppm: CcrOv/Sa 

2.5 ppm: Sa:Cf/PaprOv 

5 ppm: CcrFOv/GmFOv/PaprTOv/ 

 ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong acids & bases, calcium hypochlorite, alkali metals 

[Note: Oxidizes on exposure to air.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, resp sys; derm; cyan; cough, wheez, dysp, pulm edema, 

pneu; head, dizz, CNS depres; nau, vomit; kidney, liver, spleen damage 

TO: Eyes, skin, resp sys, CNS, kidneys, liver, spleen 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

26
Benzidine Formula: 

NH2C6H4C6H4NH2

CAS#: 

92-87-5 

RTECS#: 

DC9625000 

IDLH: 

Ca [N.D.] B Conversion: DOT: 1885 153 

Synonyms/Trade Names: Benzidine-based dyes; 4,4'-Bianiline; 4,4'-Biphenyldiamine; 1,1'-Biphenyl-4,4'-diamine; 

4,4'-Diaminobiphenyl; p-Diaminodiphenyl [Note: Benzidine has been used as a basis for many dyes.] 

Exposure Limits: 

NIOSH REL: Ca OSHA PEL: [1910.1010] 

 See Appendix A See Appendix B 

 See Appendix C See Appendix C 

Measurement Methods 

(see Table 1): 

NIOSH 5509 

Physical Description: Grayish-yellow, reddish-gray, or white crystalline powder. 

[Note: Darkens on exposure to air and light.] 

OSHA 65 

Chemical & Physical Properties: 

MW: 184.3 

BP: 752°F 

Sol(54°F): 0.04% 

Fl.P: ? 

IP: ? 

Sp.Gr: 1.25 

VP: Low 

MLT: 239°F 

UEL: ? 

LEL: ? 

Combustible Solid, but difficult to burn. 

Personal Protection/Sanitation

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam/Daily 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

See Appendix E (page 351) 

Incompatibilities and Reactivities: Red fuming nitric acid 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Hema; secondary anemia from hemolysis; acute cystitis; acute 

liver disorders; derm; painful, irreg urination; [carc] 

TO: Bladder, skin, kidneys, liver, blood [liver, kidney & bladder cancer] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

Benzoyl peroxide Formula: 

(C6H5CO)2O2

CAS#: 

94-36-0 

RTECS#: 

DM8575000 

IDLH: 

1500 mg/m3

Conversion: DOT: 

Synonyms/Trade Names: Benzoperoxide, Dibenzoyl peroxide 

Exposure Limits: 

NIOSH REL: TWA 5 mg/m3

OSHA PEL: TWA 5 mg/m3

Physical Description: Colorless to white crystals or a granular powder with a faint, 

benzaldehyde-like odor. 

Measurement Methods 

(see Table 1): 

NIOSH 5009 

Chemical & Physical Properties: 

MW: 242.2 

BP: Decomposes explosively 

Sol: <1% 

Fl.P: 176°F 

IP: ? 

Sp.Gr: 1.33 

VP: <1 mmHg 

MLT: 217°F 

UEL: ? 

LEL: ? 

Combustible Solid (easily ignited 

and burns very rapidly). 

Personal Protection/Sanitation

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

50 mg/m3

: 95XQ*/Sa* 

125 mg/m3

: Sa:Cf*/PaprHie* 

250 mg/m3: 100F/PaprTHie*/ScbaF/SaF 

1500 mg/m3

: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Incompatibilities and Reactivities: Combustible substances (wood, paper, etc.), acids, alkalis, alcohols, amines, 

ethers [Note: Containers may explode when heated. Extremely explosion-sensitive to shock, heat & friction.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, muc memb; sens derm 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 

27
Benzyl chloride Formula: 

C6H5CH2Cl 

CAS#: 

100-44-7 

RTECS#: 

XS8925000 

IDLH: 

10 ppm 

Conversion: 1 ppm = 5.18 mg/m3 DOT: 1738 156 

Synonyms/Trade Names: Chloromethylbenzene, α-Chlorotoluene 

Exposure Limits: 

NIOSH REL: C 1 ppm (5 mg/m3

) [15-minute] 

OSHA PEL: TWA 1 ppm (5 mg/m3

) 

Physical Description: Colorless to slightly yellow liquid with a pungent, aromatic odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1003 

OSHA 7 

Chemical & Physical Properties: 

MW: 126.6 

BP: 354°F 

Sol: 0.05% 

Fl.P: 153°F 

IP: ? 

Sp.Gr: 1.10 

VP: 1 mmHg 

FRZ: -38°F 

UEL: ? 

LEL: 1.1% 

Class IIIA Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

10 ppm: CcrOvAg*/GmFOvAg/ 

 PaprOvAg*/Sa*/ScbaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOvAg/ScbaE 

Incompatibilities and Reactivities: Oxidizers, acids, copper, aluminum, magnesium, iron, zinc, tin [Note: Can 

polymerize when in contact with all common metals except nickel & lead. Hydrolyzes in H2O to benzyl alcohol.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, nose; lass; irrity; head; skin eruption; pulm edema 

TO: Eyes, skin, resp sys, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

B 

Beryllium & beryllium 

compounds (as Be) 

Formula: 

Be (metal) 

CAS#: 

7440-41-7 (metal) 

RTECS#: 

DS1750000 (metal) 

IDLH: 

Ca [4 mg/m3

 (as Be)]

Conversion: DOT: 1566 154 (compounds); 1567 134 (powder) 

Synonyms/Trade Names: Beryllium metal: Beryllium 

Other synonyms vary depending upon the specific beryllium compound. 

Exposure Limits: 

NIOSH REL: Ca 

 Not to exceed 0.0005 mg/m3

 

 See Appendix A 

OSHA PEL: TWA 0.002 mg/m3

 

 C 0.005 mg/m3 0.025 mg/m3 [30-minute maximum peak] 

Physical Description: Metal: A hard, brittle, gray-white solid. 

Measurement Methods 

(see Table 1): 

NIOSH 7102, 7300, 7301, 

 7303, 9102 

OSHA ID125G, ID206 

Chemical & Physical Properties: 

MW: 9.0 

BP: 4532°F 

Sol: Insoluble 

Fl.P: NA 

IP: NA 

Sp.Gr: 1.85 (metal) 

VP: 0 mmHg (approx) 

MLT: 2349°F 

UEL: NA 

LEL: NA 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: Daily 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Metal: Noncombustible Solid in bulk form, but a slight explosion hazard in the form of a powder or dust.

Incompatibilities and Reactivities: Acids, caustics, chlorinated hydrocarbons, oxidizers, molten lithium 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con 

SY: Berylliosis (chronic exposure): anor, low-wgt, lass, chest pain, cough, 

clubbing of fingers, cyan, pulm insufficiency; irrit eyes; derm; [carc] 

TO: Eyes, skin, resp sys [lung cancer] 

First Aid (see Table 6): 

Eye: Irr immed 

Breath: Fresh air 

28
Bismuth telluride, doped with 

Selenium sulfide (as Bi2Te3) 

Formula: CAS#: RTECS#: IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: Doped bismuth sesquitelluride, Doped bismuth telluride, Doped bismuth tritelluride, 

Doped tellurobismuthite [Note: Doped with selenium sulfide. Commercial mix may contain 80% Bi2Te3, 

20% stannous telluride, plus some tellurium.] 

Exposure Limits: 

NIOSH REL: TWA 5 mg/m3

OSHA PEL†: none 

Physical Description: Gray, crystalline solid that has been enhanced (doped) with a 

small amount of selenium sulfide (SeS). 

[Note: Doping alters the conductivity of a semiconductor.] 

Measurement Methods 

(see Table 1): 

NIOSH 0500 

OSHA ID121 

Chemical & Physical Properties: 

Properties are unavailable but 

should be similar to Bismuth 

telluride, undoped. 

Sp.Gr: ? 

Noncombustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Strong oxidizers, moisture 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con 

SY: Irrit eyes, skin, upper resp sys; garlic breath; in animals: 

pulm lesions (nonfibrotic) 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

B 

Bismuth telluride, undoped Formula: 

Bi2Te3

CAS#: 

1304-82-1 

RTECS#: 

EB3110000 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: Bismuth sesquitelluride, Bismuth telluride, Bismuth tritelluride, Tellurobismuthite 

Exposure Limits: 

NIOSH REL: TWA 10 mg/m3 (total) 

 TWA 5 mg/m3 (resp) 

OSHA PEL: TWA 15 mg/m3

 (total) 

 TWA 5 mg/m3 (resp) 

Physical Description: Gray, crystalline solid. 

Measurement Methods 

(see Table 1): 

NIOSH 0500, 0600 

OSHA ID121 

Chemical & Physical Properties: 

MW: 800.8 

BP: ? 

Sol: Insoluble 

Fl.P: NA 

IP: NA 

Sp.Gr: 7.7 

VP: 0 mmHg (approx) 

MLT: 1063°F 

UEL: NA 

LEL: NA 

Noncombustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Strong oxidizers (e.g., bromine, chlorine, or fluorine), moisture, 

nitric acid (decomposes) 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con 

SY: Irrit eyes, skin, upper resp sys; garlic breath 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

29
Borates, tetra, sodium salts 

(Anhydrous) 

Formula: 

Na2BB

4O7

CAS#: 

1330-43-4 

RTECS#: 

ED4588000 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: Anhydrous borax, Borax dehydrated, Disodium salt of boric acid, 

Disodium tetrabromate, Fused borax, Sodium borate (anhydrous), Sodium tetraborate 

Exposure Limits: 

NIOSH REL: TWA 1 mg/m3

OSHA PEL†: none 

Physical Description: White to gray, odorless powder. [herbicide] 

[Note: Becomes opaque on exposure to air.] 

Measurement Methods 

(see Table 1): 

NIOSH 0500 

OSHA ID125G 

Chemical & Physical Properties: 

MW: 201.2 

BP: 2867°F (Decomposes) 

Sol: 4% 

Fl.P: NA 

IP: NA 

Sp.Gr: 2.37 

VP: 0 mmHg (approx) 

MLT: 1366°F 

UEL: NA 

LEL: NA 

Noncombustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: Daily 

Remove: N.R. 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Moisture [Note: Forms partial hydrate in moist air.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, upper resp sys; derm; epis; cough, dysp 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash 

Breath: Resp support 

Swallow: Medical attention immed 

B 

Borates, tetra, sodium salts 

(Decahydrate) 

Formula: 

Na2BB

4O7×10H2O 

CAS#: 

1303-96-4 

RTECS#: 

VZ2275000 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: Borax, Borax decahydrate, Sodium borate decahydrate, 

Sodium tetraborate decahydrate 

Exposure Limits: 

NIOSH REL: TWA 5 mg/m3

OSHA PEL†: none 

Physical Description: White, odorless, crystalline solid. [herbicide] 

[Note: Becomes anhydrous at 608°F.] 

Measurement Methods 

(see Table 1): 

NIOSH 0500 

OSHA ID125G 

Chemical & Physical Properties: 

MW: 381.4 

BP: 608°F 

Sol: 6% 

Fl.P: NA 

IP: NA 

Sp.Gr: 1.73 

VP: 0 mmHg (approx) 

MLT: 167°F 

UEL: NA 

LEL: NA 

Noncombustible Solid (an inherent 

fire retardant). 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: Daily 

Remove: N.R. 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Zirconium, strong acids, metallic salts 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, upper resp sys; derm; epis; cough, dysp 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash 

Breath: Resp support 

Swallow: Medical attention immed 

30
Borates, tetra, sodium salts 

(Pentahydrate) 

Formula: 

Na2BB

4O7×5H2O 

CAS#: 

12179-04-3 

RTECS#: 

VZ2540000 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: Borax pentahydrate, Sodium borate pentahydrate, Sodium tetraborate pentahydrate 

Exposure Limits: 

NIOSH REL: TWA 1 mg/m3

OSHA PEL†: none 

Physical Description: Colorless or white, odorless crystals or free-flowing powder. 

[herbicide] [Note: Begins to lose water of hydration at 252°F.] 

Measurement Methods 

(see Table 1): 

NIOSH 0500 

OSHA ID125G 

Chemical & Physical Properties: 

MW: 291.4 

BP: ? 

Sol: 3% 

Fl.P: NA 

IP: NA 

Sp.Gr: 1.82 

VP: 0 mmHg (approx) 

MLT: 392°F 

UEL: NA 

LEL: NA 

Noncombustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: Daily 

Remove: N.R. 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: None reported 

[Note: See the reactivities & incompatibilities reported for the related substance Borax decahydrate above.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, upper resp sys; derm; epis; cough, dysp 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash 

Breath: Resp support 

Swallow: Medical attention immed 

B 

Boron oxide Formula: 

BB

2O3

CAS#: 

1303-86-2 

RTECS#: 

ED7900000 

IDLH: 

2000 mg/m3

Conversion: DOT: 

Synonyms/Trade Names: Boric anhydride, Boric oxide, Boron trioxide 

Exposure Limits: 

NIOSH REL: TWA 10 mg/m3

OSHA PEL†: TWA 15 mg/m3

Physical Description: Colorless, semitransparent lumps or hard, white, odorless 

crystals. 

Measurement Methods 

(see Table 1): 

NIOSH 0500 

Chemical & Physical 

Properties: 

MW: 69.6 

BP: 3380°F 

Sol: 3% 

Fl.P: NA 

IP: 13.50 eV 

Sp.Gr: 2.46 

VP: 0 mmHg (approx) 

MLT: 842°F 

UEL: NA 

LEL: NA 

Noncombustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

50 mg/m3

: Qm* 

100 mg/m3

: 95XQ*/Sa* 

250 mg/m3

: Sa:Cf*/PaprHie* 

500 mg/m3

: 100F/PaprTHie*/ScbaF/SaF 

2000 mg/m3: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Incompatibilities and Reactivities: Water [Note: Reacts slowly with water to form boric acid.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, resp sys; cough; conj; skin eryt 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush prompt 

Breath: Fresh air 

Swallow: Medical attention immed 

31
Boron tribromide Formula: 

BBr3

CAS#: 

10294-33-4 

RTECS#: 

ED7400000 

IDLH: 

N.D. 

Conversion: 1 ppm = 10.25 mg/m3 DOT: 2692 157 

Synonyms/Trade Names: Boron bromide, Tribromoborane 

Exposure Limits: 

NIOSH REL: C 1 ppm (10 mg/m3) 

OSHA PEL†: none 

Physical Description: Colorless, fuming liquid with a sharp, irritating odor. 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical Properties: 

MW: 250.5 

BP: 194°F 

Sol: Decomposes 

Fl.P: NA 

IP: 9.70 eV 

Sp.Gr(65°F): 2.64 

VP(57°F): 40 mmHg 

FRZ: -51°F 

UEL: NA 

LEL: NA 

Noncombustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Moisture, water, heat, potassium, sodium, alcohols 

[Note: Attacks metals, wood & rubber. Reacts with water to form boric acid and hydrogen bromide.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, resp sys; eye, skin burns; dysp, pulm edema 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

B 

Boron trifluoride Formula: 

BF3

CAS#: 

7637-07-2 

RTECS#: 

ED2275000 

IDLH: 

25 ppm 

Conversion: 1 ppm = 2.77 mg/m3 DOT: 1008 125 

Synonyms/Trade Names: Boron fluoride, Trifluoroborane 

Exposure Limits: 

NIOSH REL: C 1 ppm (3 mg/m3

) 

OSHA PEL: C 1 ppm (3 mg/m3

) 

Measurement Methods 

(see Table 1): 

None available 

Physical Description: Colorless gas with a pungent, suffocating odor. 

[Note: Forms dense white fumes in moist air. Shipped as a nonliquefied compressed gas.] 

Chemical & Physical 

Properties: 

MW: 67.8 

BP: -148°F 

Sol: 106% (in cold H2O) 

Fl.P: NA 

IP: 15.50 eV 

RGasD: 2.38 

VP: >50 atm 

FRZ: -196°F 

UEL: NA 

LEL: NA 

Nonflammable Gas 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

10 ppm: Sa* 

25 ppm: Sa:Cf*/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFS/ScbaE 

Incompatibilities and Reactivities: Alkali metals, calcium oxide 

[Note: Hydrolyzes in moist air or hot water to form boric acid, hydrogen fluoride & fluoboric acid.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con 

SY: Irrit eyes, skin, nose, resp sys; epis; eye, skin burns; in animals: 

pneu; kidney damage 

TO: Eyes, skin, resp sys, kidneys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

32
Bromacil Formula: 

C9H13BrN2O2

CAS#: 

314-40-9 

RTECS#: 

YQ9100000 

IDLH: 

N.D. 

Conversion: 1 ppm = 10.68 mg/m3 DOT: 

Synonyms/Trade Names: 5-Bromo-3-sec-butyl-6-methyluracil, 5-Bromo-6-methyl-3-(1-methylpropyl)uracil 

Exposure Limits: 

NIOSH REL: TWA 1 ppm (10 mg/m3) 

OSHA PEL†: none 

Physical Description: Odorless, colorless to white, crystalline solid. [herbicide] 

[Note: Commercially available as a wettable powder or in liquid formulations.] 

Measurement Methods 

(see Table 1): 

NIOSH 0500 

Chemical & Physical Properties: 

MW: 261.2 

BP: Sublimes 

Sol(77°F): 0.08% 

Fl.P: NA 

IP: ? 

Sp.Gr: 1.55 

VP(212°F): 0.0008 mmHg 

MLT: 317°F (Sublimes) 

UEL: NA 

LEL: NA 

Noncombustible Solid, but may be 

dissolved in flammable liquids. 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Strong acids (decomposes slowly), oxidizers, heat, sparks, open flames 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, upper resp sys; in animals: thyroid inj 

TO: Eyes, skin, resp sys, thyroid 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

B 

Bromine Formula: 

Br2

CAS#: 

7726-95-6 

RTECS#: 

EF9100000 

IDLH: 

3 ppm 

Conversion: 1 ppm = 6.54 mg/m3 DOT: 1744 154 

Synonyms/Trade Names: Molecular bromine 

Exposure Limits: 

NIOSH REL: TWA 0.1 ppm (0.7 mg/m3

) 

 ST 0.3 ppm (2 mg/m3

) 

OSHA PEL†: TWA 0.1 ppm (0.7 mg/m3

) 

Physical Description: Dark reddish-brown, fuming liquid with suffocating, irritating 

fumes. 

Measurement Methods 

(see Table 1): 

NIOSH 6011 

OSHA ID108 

Chemical & Physical Properties: 

MW: 159.8 

BP: 139°F 

Sol: 4% 

Fl.P: NA 

IP: 10.55 eV 

Sp.Gr: 3.12 

VP: 172 mmHg 

FRZ: 19°F 

UEL: NA 

LEL: NA 

Noncombustible Liquid, but accelerates 

the burning of combustibles. 

Personal Protection/Sanitation

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

2.5 ppm: Sa:Cf£/PaprS¿£ 

3 ppm: CcrFS¿/GmFS¿/PaprTS¿£/ 

 ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFS¿/ScbaE 

Incompatibilities and Reactivities: Combustible organics (sawdust, wood, cotton, straw, etc.), aluminum, readily 

oxidizable materials, ammonia, hydrogen, acetylene, phosphorus, potassium, sodium 

[Note: Corrodes iron, steel, stainless steel & copper.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Dizz, head; lac, epis; cough, feeling of oppression, pulm edema, 

pneu; abdom pain, diarr; measle-like eruptions; eye, skin burns 

TO: Resp sys, eyes, CNS, skin 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

33
B Bromine pentafluoride Formula: 

BrF5

CAS#: 

7789-30-2 

RTECS#: 

EF9350000 

IDLH: 

N.D. 

Conversion: 1 ppm = 7.15 mg/m3 DOT: 1745 144 

Synonyms/Trade Names: Bromine fluoride 

Exposure Limits: 

NIOSH REL: TWA 0.1 ppm (0.7 mg/m3) 

OSHA PEL†: none 

Physical Description: Colorless to pale-yellow, fuming liquid with a pungent odor. 

[Note: A colorless gas above 105°F. Shipped as a compressed gas.] 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical Properties: 

MW: 174.9 

BP: 105°F 

Sol: Reacts violently 

Fl.P: NA 

IP: ? 

Sp.Gr: 2.48 

VP: 328 mmHg 

FRZ: -77°F 

UEL: NA 

LEL: NA 

Noncombustible Liquid, but a very 

powerful oxidizer. 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Acids, halogens, arsenic, selenium, sulfur, glass, organic materials, water 

[Note: Reacts with all elements except inert gases, nitrogen & oxygen.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, resp sys; corn nec; skin burns; cough, dysp, 

pulm edema; liver, kidney inj 

TO: Eyes, skin, resp sys, liver, kidneys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

Bromoform Formula: 

CHBr3

CAS#: 

75-25-2 

RTECS#: 

PB5600000 

IDLH: 

850 ppm 

Conversion: 1 ppm = 10.34 mg/m3 DOT: 2515 159 

Synonyms/Trade Names: Methyl tribromide, Tribromomethane 

Exposure Limits: 

NIOSH REL: TWA 0.5 ppm (5 mg/m3

) [skin] 

OSHA PEL: TWA 0.5 ppm (5 mg/m3

) [skin] 

Physical Description: Colorless to yellow liquid with a chloroform-like odor. 

[Note: A solid below 47°F.] 

Measurement Methods 

(see Table 1): 

NIOSH 1003 

OSHA 7 

Chemical & Physical 

Properties: 

MW: 252.8 

BP: 301°F 

Sol: 0.1% 

Fl.P: NA 

IP: 10.48 eV 

Sp.Gr: 2.89 

VP: 5 mmHg 

FRZ: 47°F 

UEL: NA 

LEL: NA 

Noncombustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

12.5 ppm: Sa:Cf£/PaprOv£ 

25 ppm: CcrFOv/GmFOv/PaprTOv£/ 

 ScbaF/SaF 

850 ppm: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Lithium, sodium, potassium, calcium, aluminum, zinc, magnesium, strong 

caustics, acetone [Note: Gradually decomposes, acquiring yellow color; air & light accelerate decomposition.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, resp sys; CNS depres; liver, kidney damage 

TO: Eyes, skin, resp sys, CNS, liver, kidneys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 

34
1,3-Butadiene Formula: 

CH2=CHCH=CH2

CAS#: 

106-99-0 

RTECS#: 

EI9275000 

IDLH: 

Ca [2000 ppm] [10%LEL] 

Conversion: 1 ppm = 2.21 mg/m3 DOT: 1010 116P (inhibited) 

Synonyms/Trade Names: Biethylene, Bivinyl, Butadiene, Divinyl, Erythrene, Vinylethylene 

Exposure Limits: 

NIOSH REL: Ca 

 See Appendix A 

OSHA PEL: [1910.1051] TWA 1 ppm 

 ST 5 ppm 

Physical Description: Colorless gas with a mild aromatic or gasoline-like odor. 

[Note: A liquid below 24°F. Shipped as a liquefied compressed gas.] 

Measurement Methods 

(see Table 1): 

NIOSH 1024 

OSHA 56 

Chemical & Physical Properties: 

MW: 54.1 

BP: 24°F 

Sol: Insoluble 

Fl.P: NA (Gas) 

 -105°F (Liquid) 

IP: 9.07 eV 

RGasD: 1.88 

Sp.Gr: 0.65 (Liquid at 24°F) 

VP: 2.4 atm 

FRZ: -164°F 

UEL: 12.0% 

LEL: 2.0% 

Flammable Gas 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Frostbite 

Eyes: Frostbite 

Wash skin: N.R. 

Remove: When wet (flamm) 

Change: N.R. 

Provide: Frostbite wash 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFS/ScbaE 

See Appendix E (page 351) 

Incompatibilities and Reactivities: Phenol, chlorine dioxide, copper, crotonaldehyde [Note: May contain 

inhibitors (e.g., tributylcatechol) to prevent self-polymerization. May form explosive peroxides upon exposure to air.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con (liquid) 

SY: Irrit eyes, nose, throat; drow, dizz; liquid: frostbite; terato, 

repro effects; [carc] 

TO: Eyes, resp sys, CNS, repro sys [hemato cancer] 

First Aid (see Table 6): 

Eye: Frostbite 

Skin: Frostbite 

Breath: Resp support 

B 

n-Butane Formula: 

CH3CH2CH2CH3

CAS#: 

106-97-8 

RTECS#: 

EJ4200000 

IDLH: 

N.D. 

Conversion: 1 ppm = 2.38 mg/m3 DOT: 1011 115; 1075 115 

Synonyms/Trade Names: normal-Butane, Butyl hydride, Diethyl, Methylethylmethane 

[Note: Also see specific listing for Isobutane.] 

Exposure Limits: 

NIOSH REL: TWA 800 ppm (1900 mg/m3) 

OSHA PEL†: none 

Physical Description: Colorless gas with a gasoline-like or natural gas odor. 

[Note: Shipped as a liquefied compressed gas. A liquid below 31°F.] 

Measurement Methods 

(see Table 1): 

OSHA 56 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Frostbite 

Eyes: Frostbite 

Wash skin: N.R. 

Remove: When wet (flamm) 

Change: N.R. 

Provide: Frostbite wash 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Chemical & Physical Properties: 

MW: 58.1 

BP: 31°F 

Sol: Slight 

Fl.P: NA (Gas) 

IP: 10.63 eV 

RGasD: 2.11 

Sp.Gr: 0.6 (Liquid at 31°F) 

VP: 2.05 atm 

FRZ: -217°F 

UEL: 8.4% 

LEL: 1.6% 

Flammable Gas 

Incompatibilities and Reactivities: Strong oxidizers (e.g., nitrates and 

perchlorates), chlorine, fluorine, (nickel carbonyl + oxygen) 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con (liquid) 

SY: Drow, narco, asphy; liquid: frostbite 

TO: CNS 

First Aid (see Table 6): 

Eye: Frostbite 

Skin: Frostbite 

Breath: Resp support 

35
B 

2-Butanone Formula: 

CH3COCH2CH3

CAS#: 

78-93-3 

RTECS#: 

EL6475000 

IDLH: 

3000 ppm 

Conversion: 1 ppm = 2.95 mg/m3 DOT: 1193 127 

Synonyms/Trade Names: Ethyl methyl ketone, MEK, Methyl acetone, Methyl ethyl ketone 

Exposure Limits: 

NIOSH REL: TWA 200 ppm (590 mg/m3) 

 ST 300 ppm (885 mg/m3) 

OSHA PEL†: TWA 200 ppm (590 mg/m3

) 

Physical Description: Colorless liquid with a moderately sharp, fragrant, mint- or 

acetone-like odor. 

Measurement Methods 

(see Table 1): 

NIOSH 2500, 2555, 3800 

OSHA 16, 84, 1004 

Chemical & Physical 

Properties: 

MW: 72.1 

BP: 175°F 

Sol: 28% 

Fl.P: 16°F 

IP: 9.54 eV 

Sp.Gr: 0.81 

VP: 78 mmHg 

FRZ: -123°F 

UEL(200°F): 11.4% 

LEL(200°F): 1.4% 

Class IB Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Provide: Eyewash 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

3000 ppm: Sa:Cf£/PaprOv£/CcrFOv/ 

 GmFOv/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, amines, ammonia, inorganic acids, caustics, isocyanates, 

pyridines 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, nose; head; dizz; vomit; derm 

TO: Eyes, skin, resp sys, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water wash immed 

Breath: Fresh air 

Swallow: Medical attention immed 

2-Butoxyethanol Formula: 

C4H9OCH2CH2OH 

CAS#: 

111-76-2 

RTECS#: 

KJ8575000 

IDLH: 

700 ppm 

Conversion: 1 ppm = 4.83 mg/m3 DOT: 2369 152 

Synonyms/Trade Names: Butyl Cellosolve®, Butyl oxitol, Dowanol® EB, EGBE, Ektasolve EB®, 

Ethylene glycol monobutyl ether, Jeffersol EB 

Exposure Limits: 

NIOSH REL: TWA 5 ppm (24 mg/m3

) [skin] 

OSHA PEL†: TWA 50 ppm (240 mg/m3

) [skin] 

Physical Description: Colorless liquid with a mild, ether-like odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1403 

OSHA 83 

Chemical & Physical 

Properties: 

MW: 118.2 

BP: 339°F 

Sol: Miscible 

Fl.P: 143°F 

IP: 10.00 eV 

Sp.Gr: 0.90 

VP: 0.8 mmHg 

FRZ: -107°F 

UEL(275°F): 12.7% 

LEL(200°F): 1.1% 

Class IIIA Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

50 ppm: CcrOv*/Sa* 

125 ppm: Sa:Cf*/PaprOv* 

250 ppm: CcrFOv/GmFOv/PaprTOv*/ 

 ScbaF/SaF 

700 ppm: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, strong caustics 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, nose, throat; hemolysis, hema; CNS depres, 

head; vomit 

TO: Eyes, skin, resp sys, CNS, hemato sys, blood, kidneys, liver, 

lymphoid sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 

36
2-Butoxyethanol acetate Formula: 

C4H9O(CH2)2OCOCH3

CAS#: 

112-07-2 

RTECS#: 

KJ8925000 

IDLH: 

N.D. 

Conversion: 1 ppm = 6.55 mg/m3 DOT: 

Synonyms/Trade Names: 2-Butoxyethyl acetate, Butyl Cellosolve® acetate, Butyl glycol acetate, EGBEA, 

Ektasolve EB® acetate, Ethylene glycol monobutyl ether acetate 

Exposure Limits: 

NIOSH REL: TWA 5 ppm (33 mg/m3

) 

OSHA PEL: none 

Physical Description: Colorless liquid with a pleasant, sweet, fruity odor. 

Measurement Methods 

(see Table 1): 

OSHA 83 

Chemical & Physical 

Properties: 

MW: 160.2 

BP: 378°F 

Sol: 1.5% 

Fl.P: 160°F 

IP: ? 

Sp.Gr: 0.94 

VP: 0.3 mmHg 

FRZ: -82°F 

UEL(275°F): 8.54% 

LEL(200°F): 0.88% 

Class IIIA Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

50 ppm: CcrOv*/Sa* 

125 ppm: Sa:Cf*/PaprOv* 

250 ppm: CcrFOv/GmFOv/PaprTOv*/ 

 ScbaF/SaF 

700 ppm: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, nose, throat; hemolysis, hema; CNS depres, head; vomit 

TO: Eyes, skin, resp sys, CNS, hemato sys, blood, kidneys, liver, lymphoid 

sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 

B 

n-Butyl acetate Formula: 

CH3COO[CH2]3CH3

CAS#: 

123-86-4 

RTECS#: 

AF7350000 

IDLH: 

1700 ppm [10%LEL] 

Conversion: 1 ppm = 4.75 mg/m3 DOT: 1123 129 

Synonyms/Trade Names: Butyl acetate, n-Butyl ester of acetic acid, Butyl ethanoate 

Exposure Limits: 

NIOSH REL: TWA 150 ppm (710 mg/m3

) 

 ST 200 ppm (950 mg/m3

) 

OSHA PEL†: TWA 150 ppm (710 mg/m3

) 

Physical Description: Colorless liquid with a fruity odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1450 

OSHA 7 

Chemical & Physical 

Properties: 

MW: 116.2 

BP: 258°F 

Sol: 1% 

Fl.P: 72°F 

IP: 10.00 eV 

Sp.Gr: 0.88 

VP: 10 mmHg 

FRZ: -107°F 

UEL: 7.6% 

LEL: 1.7% 

Class IB Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

1500 ppm: CcrOv*/Sa* 

1700 ppm: Sa:Cf*/PaprOv*/CcrFOv/ 

 GmFOv/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Nitrates; strong oxidizers, alkalis & acids 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, upper resp sys; head, drow, narco 

TO: Eyes, skin, resp sys, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush prompt 

Breath: Resp support 

Swallow: Medical attention immed 

37
B sec-Butyl acetate Formula: 

CH3COOCH(CH3)CH2CH3

CAS#: 

105-46-4 

RTECS#: 

AF7380000 

IDLH: 

1700 ppm [10%LEL]

Conversion: 1 ppm = 4.75 mg/m3 DOT: 1123 129 

Synonyms/Trade Names: sec-Butyl ester of acetic acid, 1-Methylpropyl acetate 

Exposure Limits: 

NIOSH REL: TWA 200 ppm (950 mg/m3) 

OSHA PEL: TWA 200 ppm (950 mg/m3

) 

Physical Description: Colorless liquid with a pleasant, fruity odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1450 

OSHA 7 

Chemical & Physical 

Properties: 

MW: 116.2 

BP: 234°F 

Sol: 0.8% 

Fl.P: 62°F 

IP: 9.91 eV 

Sp.Gr: 0.86 

VP: 10 mmHg 

FRZ: -100°F 

UEL: 9.8% 

LEL: 1.7% 

Class IB Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

1700 ppm: Sa:Cf£/PaprOv£/CcrFOv/ 

 GmFOv/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Nitrates; strong oxidizers, alkalis & acids 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes; head; drow; dryness upper resp sys, skin; narco 

TO: Eyes, skin, resp sys, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush prompt 

Breath: Resp support 

Swallow: Medical attention immed 

tert-Butyl acetate Formula: 

CH3COOC(CH3)3

CAS#: 

540-88-5 

RTECS#: 

AF7400000 

IDLH: 

1500 ppm [10%LEL]

Conversion: 1 ppm = 4.75 mg/m3 DOT: 1123 129 

Synonyms/Trade Names: tert-Butyl ester of acetic acid 

Exposure Limits: 

NIOSH REL: TWA 200 ppm (950 mg/m3

) 

OSHA PEL: TWA 200 ppm (950 mg/m3

) 

Physical Description: Colorless liquid with a fruity odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1450 

OSHA 7 

Chemical & Physical 

Properties: 

MW: 116.2 

BP: 208°F 

Sol: Insoluble 

Fl.P: 72°F 

IP: ? 

Sp.Gr: 0.87 

VP: ? 

FRZ: ? 

UEL: ? 

LEL: 1.5% 

Class IB Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

1500 ppm: Sa:Cf£/PaprOv£/CcrFOv/ 

 GmFOv/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Nitrates; strong oxidizers, alkalis & acids 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Itch, inflamm eyes; irrit upper resp tract; head; narco; derm 

TO: Resp sys, eyes, skin, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush prompt 

Breath: Resp support 

Swallow: Medical attention immed 

38
Butyl acrylate Formula: 

CH2=CHCOOC4H9

CAS#: 

141-32-2 

RTECS#: 

UD3150000 

IDLH: 

N.D. 

Conversion: 1 ppm = 5.24 mg/m3 DOT: 2348 130P 

Synonyms/Trade Names: n-Butyl acrylate, Butyl ester of acrylic acid, Butyl-2-propenoate 

Exposure Limits: 

NIOSH REL: TWA 10 ppm (55 mg/m3) 

OSHA PEL†: none 

Physical Description: Clear, colorless liquid with a strong, fruity odor. [Note: Highly 

reactive; may contain an inhibitor to prevent spontaneous polymerization.] 

Measurement Methods 

(see Table 1): 

OSHA PV2011 

Chemical & Physical Properties: 

MW: 128.2 

BP: 293°F 

Sol: 0.1% 

Fl.P: 103°F 

IP: ? 

Sp.Gr: 0.89 

VP: 4 mmHg 

FRZ: -83°F 

UEL: 9.9% 

LEL: 1.5% 

Class II Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Strong acids & alkalis, amines, halogens, hydrogen compounds, oxidizers, 

heat, flame, sunlight [Note: Polymerizes readily on heating.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, upper resp sys; sens derm; dysp 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

B 

n-Butyl alcohol Formula: 

CH3CH2CH2CH2OH 

CAS#: 

71-36-3 

RTECS#: 

EO1400000 

IDLH: 

1400 ppm [10%LEL] 

Conversion: 1 ppm = 3.03 mg/m3 DOT: 1120 129 

Synonyms/Trade Names: 1-Butanol, n-Butanol, Butyl alcohol, 1-Hydroxybutane, n-Propyl carbinol 

Exposure Limits: 

NIOSH REL: C 50 ppm (150 mg/m3

) [skin] 

OSHA PEL†: TWA 100 ppm (300 mg/m3

) 

Physical Description: Colorless liquid with a strong, characteristic, mildly alcoholic 

odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1401, 1405 

OSHA 7 

Chemical & Physical 

Properties: 

MW: 74.1 

BP: 243°F 

Sol: 9% 

Fl.P: 84°F 

IP: 10.04 eV 

Sp.Gr: 0.81 

VP: 6 mmHg 

FRZ: -129°F 

UEL: 11.2% 

LEL: 1.4% 

Class IC Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

1250 ppm: Sa:Cf£/PaprOv£ 

1400 ppm: CcrFOv/GmFOv/PaprTOv£/ 

 ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, strong mineral acids, alkali metals, halogens 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, nose, throat; head, dizz, drow; corn inflamm, blurred 

vision, lac, photo; derm; possible auditory nerve damage, hearing 

loss; CNS depres 

TO: Eyes, skin, resp sys, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush prompt 

Breath: Resp support 

Swallow: Medical attention immed 

39
B sec-Butyl alcohol Formula: 

CH3CH(OH)CH2CH3

CAS#: 

78-92-2 

RTECS#: 

EO1750000 

IDLH: 

2000 ppm 

Conversion: 1 ppm = 3.03 mg/m3 DOT: 1120 129 

Synonyms/Trade Names: 2-Butanol, Butylene hydrate, 2-Hydroxybutane, Methyl ethyl carbinol 

Exposure Limits: 

NIOSH REL: TWA 100 ppm (305 mg/m3) 

 ST 150 ppm (455 mg/m3) 

OSHA PEL†: TWA 150 ppm (450 mg/m3

) 

Physical Description: Colorless liquid with a strong, pleasant odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1401, 1405 

OSHA 7 

Chemical & Physical 

Properties: 

MW: 74.1 

BP: 211°F 

Sol: 16% 

Fl.P: 75°F 

IP: 10.10 eV 

Sp.Gr: 0.81 

VP: 12 mmHg 

FRZ: -175°F 

UEL(212°F): 9.8% 

LEL(212°F): 1.7% 

Class IC Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

1000 ppm: CcrOv*/Sa* 

2000 ppm: Sa:Cf*/PaprOv*/CcrFOv/ 

 GmFOv/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, organic peroxides, perchloric & permonosulfuric acids 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, nose, throat; narco 

TO: Eyes, skin, resp sys, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush prompt 

Breath: Resp support 

Swallow: Medical attention immed 

tert-Butyl alcohol Formula: 

(CH3)3COH 

CAS#: 

75-65-0 

RTECS#: 

EO1925000 

IDLH: 

1600 ppm 

Conversion: 1 ppm = 3.03 mg/m3 DOT: 1120 129 

Synonyms/Trade Names: 2-Methyl-2-propanol, Trimethyl carbinol 

Exposure Limits: 

NIOSH REL: TWA 100 ppm (300 mg/m3

) 

 ST 150 ppm (450 mg/m3

) 

OSHA PEL†: TWA 100 ppm (300 mg/m3

) 

Physical Description: Colorless solid or liquid (above 77°F) with a camphor-like odor. 

[Note: Often used in aqueous solutions.] 

Measurement Methods 

(see Table 1): 

NIOSH 1400 

OSHA 7 

Chemical & Physical 

Properties: 

MW: 74.1 

BP: 180°F 

Sol: Miscible 

Fl.P: 52°F 

IP: 9.70 eV 

Sp.Gr: 0.79 (Solid) 

VP(77°F): 42 mmHg 

FRZ: 78°F 

UEL: 8.0% 

LEL: 2.4% 

Combustible Solid 

Class IB Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

1600 ppm: Sa:Cf£/PaprOv£/CcrFOv/ 

 GmFOv/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong mineral acids, strong hydrochloric acid, oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, nose, throat; drow, narco 

TO: Eyes, skin, resp sys, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush prompt 

Breath: Resp support 

Swallow: Medical attention immed 

40
n-Butylamine Formula: 

CH3CH2CH2CH2NH2

CAS#: 

109-73-9 

RTECS#: 

EO2975000 

IDLH: 

300 ppm 

Conversion: 1 ppm = 2.99 mg/m3 DOT: 1125 132 

Synonyms/Trade Names: 1-Aminobutane, Butylamine 

Exposure Limits: 

NIOSH REL: C 5 ppm (15 mg/m3) [skin] 

OSHA PEL: C 5 ppm (15 mg/m3

) [skin] 

Physical Description: Colorless liquid with a fishy, ammonia-like odor. 

Measurement Methods 

(see Table 1): 

NIOSH 2012 

Chemical & Physical Properties: 

MW: 73.2 

BP: 172°F 

Sol: Miscible 

Fl.P: 10°F 

IP: 8.71 eV 

Sp.Gr: 0.74 

VP: 82 mmHg 

FRZ: -58°F 

UEL: 9.8% 

LEL: 1.7% 

Class IB Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

50 ppm: CcrS*/Sa* 

125 ppm: Sa:Cf*/PaprS* 

250 ppm: CcrFS/GmFS/PaprTS*/ 

 ScbaF/SaF 

300 ppm: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFS/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, strong acids 

[Note: May corrode some metals in presence of water.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, nose, throat; head; skin flush, burns 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

B 

tert-Butyl chromate Formula: 

[(CH3)3CO]2CrO2

CAS#: 

1189-85-1 

RTECS#: 

GB2900000 

IDLH: 

Ca [15 mg/m3 {as Cr(VI)}] 

Conversion: DOT: 

Synonyms/Trade Names: di-tert-Butyl ester of chromic acid 

Exposure Limits: 

NIOSH REL: Ca 

 TWA 0.001 mg Cr(VI)/m3

 

 See Appendix A 

 See Appendix C 

OSHA PEL: TWA 0.005 mg CrO3/m3

 [skin] 

 See Appendix C 

Physical Description: Liquid. [Note: Solidifies at 32-23°F.] 

Measurement Methods 

(see Table 1): 

NIOSH 7604 

OSHA ID103, ID215 

Chemical & Physical 

Properties: 

MW: 230.3 

BP: ? 

Sol: ? 

Fl.P: ? 

IP: ? 

Sp.Gr: ? 

VP: ? 

FRZ: 32-23°F 

UEL: ? 

LEL: ? 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam/Daily 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Incompatibilities and Reactivities: Reducing agents, moisture, acids, alcohols, hydrazine, combustible materials 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, resp sys; eye, skin burns; drow, musc weak; 

skin ulcers; lung changes; [carc] 

TO: Eyes, skin, resp sys, CNS [lung cancer] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

41
n-Butyl glycidyl ether Formula: 

C7H14O2

CAS#: 

2426-08-6 

RTECS#: 

TX4200000 

IDLH: 

250 ppm 

Conversion: 1 ppm = 5.33 mg/m3 DOT: 

Synonyms/Trade Names: BGE; 1,2-Epoxy-3-butoxypropane 

Exposure Limits: 

NIOSH REL: C 5.6 ppm (30 mg/m3) [15-minute] 

OSHA PEL†: TWA 50 ppm (270 mg/m3

) 

Physical Description: Colorless liquid with an irritating odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1616 

OSHA 7 

Chemical & Physical 

Properties: 

MW: 130.2 

BP: 327°F 

Sol: 2% 

Fl.P: 130°F 

IP: ? 

Sp.Gr: 0.91 

VP(77°F): 3 mmHg 

FRZ: ? 

UEL: ? 

LEL: ? 

Class II Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

56 ppm: CcrOv*/Sa* 

140 ppm: Sa:Cf*/PaprOv* 

250 ppm: CcrFOv/GmFOv/PaprTOv*/ 

 ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, strong caustics 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, nose; skin sens; narco; possible hemato 

effects; CNS depres 

TO: Eyes, skin, resp sys, CNS, blood 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

B 

n-Butyl lactate Formula: 

CH3CH(OH)COOC4H9

CAS#: 

138-22-7 

RTECS#: 

OD4025000 

IDLH: 

N.D. 

Conversion: 1 ppm = 5.98 mg/m3 DOT: 1993 128 (combustible liquid, n.o.s.) 

Synonyms/Trade Names: Butyl ester of 2-hydroxypropanoic acid, Butyl ester of lactic acid, Butyl lactate 

Exposure Limits: 

NIOSH REL: TWA 5 ppm (25 mg/m3

) 

OSHA PEL†: none 

Physical Description: Clear, colorless to white liquid with a mild, transient odor. 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical Properties: 

MW: 146.2 

BP: 370°F 

Sol: Slight 

Fl.P: 160°F 

IP: ? 

Sp.Gr: 0.98 

VP: 0.4 mmHg 

FRZ: -45°F 

UEL: ? 

LEL: 1.15% 

Class IIIA Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Strong acids & bases, strong oxidizers, heat, sparks, open flames 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, nose, throat; drow, head, CNS depres; nau, vomit 

TO: Eyes, skin, resp sys, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

42
n-Butyl mercaptan Formula: 

CH3CH2CH2CH2SH 

CAS#: 

109-79-5 

RTECS#: 

EK6300000 

IDLH: 

500 ppm 

Conversion: 1 ppm = 3.69 mg/m3 DOT: 2347 130 

Synonyms/Trade Names: Butanethiol, 1-Butanethiol, n-Butanethiol, 1-Mercaptobutane 

Exposure Limits: 

NIOSH REL: C 0.5 ppm (1.8 mg/m3) [15-minute] 

OSHA PEL†: TWA 10 ppm (35 mg/m3

) 

Physical Description: Colorless liquid with a strong, garlic-, cabbage-, or 

skunk-like odor. 

Measurement Methods 

(see Table 1): 

NIOSH 2525, 2542 

Chemical & Physical 

Properties: 

MW: 90.2 

BP: 209°F 

Sol: 0.06% 

Fl.P: 35°F 

IP: 9.15 eV 

Sp.Gr: 0.83 

VP: 35 mmHg 

FRZ: -176°F 

UEL: ? 

LEL: ? 

Class IB Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

5 ppm: CcrOv/Sa 

12.5 ppm: Sa:Cf/PaprOv 

25 ppm: CcrFOv/GmFOv/PaprTOv/ScbaF/SaF 

500 ppm: Sa:Pd,Pp* 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers (such as dry bleaches), acids 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin; musc weak, mal, sweat, nau, vomit, head, conf; in 

animals: narco, inco, lass; cyan, pulm irrit; liver, kidney damage 

TO: Eyes, skin, resp sys, CNS, liver, kidneys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 

B 

o-sec-Butylphenol Formula: 

CH3CH2CH(CH3)C6H4OH 

CAS#: 

89-72-5 

RTECS#: 

SJ8920000 

IDLH: 

N.D. 

Conversion: 1 ppm = 6.14 mg/m3 DOT: 

Synonyms/Trade Names: 2-sec-Butylphenol; 2-(1-Methylpropyl)phenol 

Exposure Limits: 

NIOSH REL: TWA 5 ppm (30 mg/m3

) [skin] 

OSHA PEL†: none 

Physical Description: Colorless liquid or solid (below 61°F). 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical Properties: 

MW: 150.2 

BP: 227°F 

Sol: Insoluble 

Fl.P: 225°F 

IP: ? 

Sp.Gr: 0.89 

VP: Low 

FRZ: 61°F 

UEL: ? 

LEL: ? 

Class IIB Combustible Liquid 

Combustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: None reported 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, resp sys; skin burns 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

43
B p-tert-Butyltoluene Formula: 

(CH3)3CC6H4CH3

CAS#: 

98-51-1 

RTECS#: 

XS8400000 

IDLH: 

100 ppm 

Conversion: 1 ppm = 6.07 mg/m3 DOT: 2667 152 

Synonyms/Trade Names: 4-tert-Butyltoluene, 1-Methyl-4-tert-butylbenzene 

Exposure Limits: 

NIOSH REL: TWA 10 ppm (60 mg/m3) 

 ST 20 ppm (120 mg/m3) 

OSHA PEL†: TWA 10 ppm (60 mg/m3

) 

Measurement Methods 

(see Table 1): 

NIOSH 1501 

OSHA 7 

Physical Description: Colorless liquid with a distinct aromatic odor, somewhat like gasoline. 

Chemical & Physical 

Properties: 

MW: 148.3 

BP: 379°F 

Sol: Insoluble 

Fl.P: 155°F 

IP: 8.28 eV 

Sp.Gr: 0.86 

VP(77°F): 0.7 mmHg 

FRZ: -62°F 

UEL: ? 

LEL: ? 

Class IIIA Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

100 ppm: Sa:Cf£/PaprOv£/CcrFOv/ 

 GmFOv/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin; dry nose, throat; head; low BP, tacar, abnor 

CVS stress; CNS, hemato depres; metallic taste; liver, kidney inj 

TO: Eyes, skin, resp sys, CVS, CNS, bone marrow, liver, kidneys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush prompt 

Breath: Resp support 

Swallow: Medical attention immed 

n-Butyronitrile Formula: 

CH3CH2CH2CN 

CAS#: 

109-74-0 

RTECS#: 

ET8750000 

IDLH: 

N.D. 

Conversion: 1 ppm = 2.83 mg/m3 DOT: 2411 131 

Synonyms/Trade Names: Butanenitrile, Butyronitrile, 1-Cyanopropane, Propyl cyanide, n-Propyl cyanide 

Exposure Limits: 

NIOSH REL: TWA 8 ppm (22 mg/m3

) 

OSHA PEL: none 

Physical Description: Colorless liquid with a sharp, suffocating odor. 

[Note: Forms cyanide in the body.] 

Measurement Methods 

(see Table 1): 

NIOSH 1606 (adapt) 

Chemical & Physical 

Properties: 

MW: 69.1 

BP: 244°F 

Sol(77°F): 3% 

Fl.P: 62°F 

IP: 11.67 eV 

Sp.Gr: 0.81 

VP: 14 mmHg 

FRZ: -170°F 

UEL: ? 

LEL: 1.65% 

Class IB Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Provide: Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

80 ppm: CcrOv/Sa 

200 ppm: Sa:Cf/PaprOv 

400 ppm: CcrFOv/GmFOv/PaprTOv/ 

 ScbaF/SaF 

1000 ppm: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers & reducing agents, strong acids & bases 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, resp sys; head, dizz, lass, conf, convuls; 

dysp; abdom pain, nau, vomit 

TO: Eyes, skin, resp sys, CNS, CVS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

44
Cadmium dust (as Cd) Formula: 

Cd (metal) 

CAS#: 

7440-43-9 (metal) 

RTECS#: 

EU9800000 (metal) 

IDLH: 

Ca [9 mg/m3

 (as Cd)] 

Conversion: DOT: 2570 154 (cadmium compound) 

Synonyms/Trade Names: Cadmium metal: Cadmium 

Other synonyms vary depending upon the specific cadmium compound. 

Exposure Limits: 

NIOSH REL*: Ca 

 See Appendix A 

OSHA PEL*: [1910.1027] TWA 0.005 mg/m3 

[*Note: The REL and PEL apply to all Cadmium compounds (as Cd).]

Measurement Methods 

(see Table 1): 

NIOSH 7048, 7300, 7301, 7303, 9102 

OSHA ID121, ID125G, ID189, ID206

Physical Description: Metal: Silver-white, blue-tinged lustrous, odorless solid.

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: Daily 

Remove: N.R. 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

See Appendix E (page 351) 

Chemical & Physical Properties: 

MW: 112.4 

BP: 1409°F 

Sol: Insoluble 

Fl.P: NA 

IP: NA 

Sp.Gr: 8.65 (metal) 

VP: 0 mmHg (approx) 

MLT: 610°F 

UEL: NA 

LEL: NA 

Metal: Noncombustible Solid in bulk 

form, but will burn in powder form. 

Incompatibilities and Reactivities: Strong oxidizers; elemental sulfur, 

selenium & tellurium 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing 

SY: Pulm edema, dysp, cough, chest tight, subs pain; head; 

chills, musc aches; nau, vomit, diarr; anos, emphy, prot, mild 

anemia; [carc] 

TO: Resp sys, kidneys, prostate, blood [prostatic & lung cancer] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash 

Breath: Resp support 

Swallow: Medical attention immed 

C 

Cadmium fume (as Cd) Formula: 

CdO/Cd 

CAS#: 

1306-19-0 (CdO)

RTECS#: 

EV1930000 (CdO) 

IDLH: 

Ca [9 mg/m3

 (as Cd)] 

Conversion: DOT: 

Synonyms/Trade Names: CdO: Cadmium monoxide, Cadmium oxide fume Cd: Cadmium 

Exposure Limits: 

NIOSH REL*: Ca 

 See Appendix A 

OSHA PEL*: [1910.1027] TWA 0.005 mg/m3 

[*Note: The REL and PEL apply to all Cadmium compounds (as Cd).] 

Physical Description: Odorless, yellow-brown, finely divided particulate 

dispersed in air. [Note: See listing for Cadmium dust for properties of Cd.] 

Measurement Methods 

(see Table 1): 

NIOSH 7048, 7300, 7301, 7303 

OSHA ID121, ID125G, ID189, ID206 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: Daily 

Remove: N.R. 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

45

Escape: 100F/ScbaE 

See Appendix E (page 351) 

Chemical & Physical Properties: 

MW: 128.4 

BP: Decomposes 

Sol: Insoluble 

Fl.P: NA 

IP: NA 

Sp.Gr: 8.15 (crystalline form) 

 6.95 (amorphous form) 

VP: 0 mmHg (approx) 

MLT: 2599°F 

UEL: NA 

LEL: NA 

Noncombustible Solid Incompatibilities and Reactivities: Not applicable 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh 

SY: Pulm edema, dysp, cough, chest tight, subs pain; head; chills, musc 

aches; nau, vomit, diarr; emphy, prot, anos, mild anemia; [carc] 

TO: Resp sys, kidneys, blood [prostatic & lung cancer] 

First Aid (see Table 6): 

Breath: Resp support 
Calcium arsenate (as As) Formula: 

Ca3(AsO4)2

CAS#: 

7778-44-1 

RTECS#: 

CG0830000 

IDLH: 

Ca [5 mg/m3

 (as As)]

Conversion: DOT: 1573 151 

Synonyms/Trade Names: Calcium salt (2:3) of arsenic acid, Cucumber dust, Tricalcium arsenate, 

Tricalcium ortho-arsenate [Note: Also see specific listing for Arsenic (inorganic compounds, as As).] 

Exposure Limits: 

NIOSH REL: Ca 

 C 0.002 mg/m3

 [15-minute] 

 See Appendix A 

OSHA PEL: [1910.1018] TWA 0.010 mg/m3

Physical Description: Colorless to white, odorless solid. [insecticide/herbicide] 

Measurement Methods 

(see Table 1): 

NIOSH 7900 

OSHA ID105 

Chemical & Physical 

Properties: 

MW: 398.1 

BP: Decomposes 

Sol(77°F): 0.01% 

Fl.P: NA 

IP: NA 

Sp.Gr: 3.62 

VP: 0 mmHg (approx) 

MLT: ? 

UEL: NA 

LEL: NA 

Noncombustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam/Daily 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Incompatibilities and Reactivities: None reported 

[Note: Produces toxic fumes of arsenic when heated to decomposition.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Lass; GI dist; peri neur; skin hyperpig, palmar planter 

hyperkeratoses; derm; [carc]; in animals: liver damage 

TO: Eyes, resp sys, liver, skin, CNS, lymphatic sys [lymphatic & 

lung cancer] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 

C 

Calcium carbonate Formula: 

CaCO3

CAS#: 471-34-1 (synthetic) 

 1317-65-3 (natural) 

RTECS#: 

EV9580000 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: Calcium salt of carbonic acid 

[Note: Occurs in nature as as limestone, chalk, marble, dolomite, aragonite, calcite & oyster shells.] 

Exposure Limits: 

NIOSH REL: TWA 10 mg/m3 (total) 

 TWA 5 mg/m3 (resp) 

OSHA PEL: TWA 15 mg/m3

 (total) 

 TWA 5 mg/m3 (resp) 

Physical Description: White, odorless powder or colorless crystals. 

Measurement Methods 

(see Table 1): 

NIOSH 7020, 7303 

OSHA ID121 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Chemical & Physical Properties: 

MW: 100.1 

BP: Decomposes 

Sol: 0.001% 

Fl.P: NA 

IP: NA 

Sp.Gr: 2.7-2.95 

VP: 0 mmHg (approx) 

MLT: 1517-2442°F (Decomposes) 

UEL: NA 

LEL: NA 

Noncombustible Solid 

Incompatibilities and Reactivities: Acids, alum, ammonium salts, 

mercury & hydrogen, fluorine, magnesium 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con 

SY: Irrit eyes, skin, resp sys; cough 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash 

Breath: Fresh air 

46
Calcium cyanamide Formula: 

CaCN2

CAS#: 

156-62-7 

RTECS#: 

GS6000000 

IDLH: 

N.D. 

Conversion: DOT: 1403 138 (with >0.1% calcium carbide) 

Synonyms/Trade Names: Calcium carbimide, Cyanamide, Lime nitrogen, Nitrogen lime 

[Note: Cyanamide is also a synonym for Hydrogen cyanamide, NH2CN.] 

Exposure Limits: 

NIOSH REL: TWA 0.5 mg/m3

 

OSHA PEL†: none 

Physical Description: Colorless, gray, or black crystals or powder. [fertilizer] 

[Note: Commercial grades may contain calcium carbide.] 

Measurement Methods 

(see Table 1): 

NIOSH 0500 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Chemical & Physical Properties: 

MW: 80.1 

BP: Sublimes 

Sol: Insoluble 

Fl.P: NA 

IP: NA 

Sp.Gr: 2.29 

VP: 0 mmHg (approx) 

MLT: 2444°F 

UEL: NA 

LEL: NA 

Noncombustible Solid, but a fire risk 

if it contains calcium carbide. 

Incompatibilities and Reactivities: Water 

[Note: May polymerize in water or alkaline solutions to dicyanamide. 

Decomposes in water to form acetylene & ammonia.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, resp sys; head, dizz, rapid breath, low BP, 

nau, vomit; skin burns, sens; cough; Antabuse-like effects 

TO: Eyes, skin, resp sys, vasomotor sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

C 

Calcium hydroxide Formula: 

Ca(OH)2

CAS#: 

1305-62-0 

RTECS#: 

EW2800000 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: Calcium hydrate, Caustic lime, Hydrated lime, Slaked lime 

Exposure Limits: 

NIOSH REL: TWA 5 mg/m3

OSHA PEL: TWA 15 mg/m3 (total) 

 TWA 5 mg/m3

 (resp) 

Physical Description: White, odorless powder. 

[Note: Readily absorbs CO2 from the air to form calcium carbonate.] 

Measurement Methods 

(see Table 1): 

NIOSH 7020 

OSHA ID121 

Chemical & Physical Properties: 

MW: 74.1 

BP: Decomposes 

Sol(32°F): 0.2% 

Fl.P: NA 

IP: NA 

Sp.Gr: 2.24 

VP: 0 mmHg (approx) 

MLT: 1076°F (Decomposes) (Loses H2O) 

UEL: NA 

LEL: NA 

Noncombustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam/Daily 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Maleic anhydride, phosphorus, nitroethane, nitromethane, nitroparaffins, 

nitropropane [Note: Attacks some metals.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, upper resp sys; eye, skin burns; skin vesic; 

cough, bron, pneu 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

47
Calcium oxide Formula: 

CaO 

CAS#: 

1305-78-8 

RTECS#: 

EW3100000 

IDLH: 

25 mg/m3

Conversion: DOT: 1910 157 

Synonyms/Trade Names: Burned lime, Burnt lime, Lime, Pebble lime, Quick lime, Unslaked lime 

Exposure Limits: 

NIOSH REL: TWA 2 mg/m3

OSHA PEL: TWA 5 mg/m3

Physical Description: White or gray, odorless lumps or granular powder. 

Measurement Methods 

(see Table 1): 

NIOSH 7020, 7303 

OSHA ID121 

Chemical & Physical Properties: 

MW: 56.1 

BP: 5162°F 

Sol: Reacts 

Fl.P: NA 

IP: NA 

Sp.Gr: 3.34 

VP: 0 mmHg (approx) 

MLT: 4662°F 

UEL: NA 

LEL: NA 

Noncombustible Solid, but will support 

combustion by liberation of oxygen. 

Personal Protection/Sanitation

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam/Daily 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

10 mg/m3

: Qm 

20 mg/m3: 95XQ/Sa 

25 mg/m3

: Sa:Cf/PaprHie/100F/ 

 ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Incompatibilities and Reactivities: Water (liberates heat), fluorine, ethanol 

[Note: Reacts with water to form calcium hydroxide.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, upper resp tract; ulcer, perf nasal septum; pneu; derm 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

C 

Calcium silicate Formula: 

CaSiO3

CAS#: 

1344-95-2 

RTECS#: 

VV9150000 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: Calcium hydrosilicate, Calcium metasilicate, Calcium monosilicate, 

Calcium salt of silicic acid 

Exposure Limits: 

NIOSH REL: TWA 10 mg/m3

 (total) 

 TWA 5 mg/m3

 (resp) 

OSHA PEL: TWA 15 mg/m3

 (total) 

 TWA 5 mg/m3

 (resp) 

Physical Description: White or cream-colored, free-flowing powder. 

[Note: The commercial product is prepared from diatomaceous earth & lime.] 

Measurement Methods 

(see Table 1): 

NIOSH 7020 

OSHA ID121 

Chemical & Physical Properties:

MW: 116.2 

BP: ? 

Sol: 0.01% 

Fl.P: NA 

IP: NA 

Sp.Gr: 2.9 

VP: 0 mmHg (approx) 

MLT: 2804°F 

UEL: NA 

LEL: NA 

Noncombustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: None reported 

[Note: After prolonged contact with water, solution reverts to soluble calcium salts & amorphous silica.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con 

SY: Irrit eyes, skin, upper resp sys 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash 

Breath: Fresh air 

48
Calcium sulfate Formula: 

CaSO4

CAS#: 

7778-18-9 

RTECS#: 

WS6920000 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: Anhydrous calcium sulfate, Anhydrous gypsum, Anhydrous sulfate of lime, 

Calcium salt of sulfuric acid [Note: Gypsum is the dihydrate form & Plaster of Paris is the hemihydrate form.] 

Exposure Limits: 

NIOSH REL: TWA 10 mg/m3

 (total) 

 TWA 5 mg/m3

 (resp) 

OSHA PEL: TWA 15 mg/m3

 (total) 

 TWA 5 mg/m3

 (resp) 

Physical Description: Odorless, white powder or colorless, crystalline solid. 

[Note: May have blue, gray, or reddish tinge.] 

Measurement Methods 

(see Table 1): 

NIOSH 0500, 0600 

Chemical & Physical Properties: 

MW: 136.1 

BP: Decomposes 

Sol: 0.3% 

Fl.P: NA 

IP: NA 

Sp.Gr: 2.96 

VP: 0 mmHg (approx) 

MLT: 2840°F (Decomposes) 

UEL: NA 

LEL: NA 

Noncombustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Diazomethane, aluminum, phosphorus, water 

[Note: Hygroscopic (i.e., absorbs moisture from the air). Reacts with water to form Gypsum & Plaster of Paris.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con 

SY: Irrit eyes, skin, upper resp sys; conj; rhinitis, epis 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash 

Breath: Fresh air 

C 

Camphor (synthetic) Formula: 

C10H16O 

CAS#: 

76-22-2 

RTECS#: 

EX1225000 

IDLH: 

200 mg/m3

Conversion: DOT: 2717 133 

Synonyms/Trade Names: 2-Camphonone, Gum camphor, Laurel camphor, Synthetic camphor 

Exposure Limits: 

NIOSH REL: TWA 2 mg/m3

OSHA PEL: TWA 2 mg/m3

Physical Description: Colorless or white crystals with a penetrating, aromatic odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1301, 2553 

OSHA 7 

Chemical & Physical 

Properties: 

MW: 152.3 

BP: 399°F 

Sol: Insoluble 

Fl.P: 150°F 

IP: 8.76 eV 

Sp.Gr: 0.99 

VP: 0.2 mmHg 

MLT: 345°F 

UEL: 3.5% 

LEL: 0.6% 

Combustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

50 mg/m3

: Sa:Cf£/PaprOvHie£ 

100 mg/m3

: CcrFOv100/GmFOv100/ 

 PaprTOvHie£/ScbaF/SaF 

200 mg/m3

: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers (especially chromic anhydride & potassium permanganate) 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, muc memb; nau, vomit, diarr; head, dizz, 

excitement, epilep convuls 

TO: Eyes, skin, resp sys, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

49
Caprolactam Formula: 

C2H11NO 

CAS#: 

105-60-2 

RTECS#: 

CM3675000 

IDLH: 

N.D. 

Conversion: 1 ppm = 4.63 mg/m3 DOT: 

Synonyms/Trade Names: Aminocaproic lactam, epsilon-Caprolactam, Hexahydro-2H-azepin-2-one, 

2-Oxohexamethyleneimine 

Exposure Limits: 

NIOSH REL: Dust: TWA 1 mg/m3

 

 ST 3 mg/m3

 

 Vapor: TWA 0.22 ppm (1 mg/m3

) 

 ST 0.66 ppm (3 mg/m3) 

OSHA PEL†: none 

Measurement Methods 

(see Table 1): 

OSHA PV2012 

Physical Description: White, crystalline solid or flakes with an unpleasant odor. 

[Note: Significant vapor concentrations would be expected only at elevated temperatures.] 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Chemical & Physical Properties: 

MW: 113.2 

BP: 515°F 

Sol: 53% 

Fl.P: 282°F 

IP: ? 

Sp.Gr: 1.01 

VP: 0.00000008 mmHg 

MLT: 156°F 

UEL: 8.0% 

LEL: 1.4% 

Combustible Solid 

Incompatibilities and Reactivities: Strong oxidizers, 

(acetic acid + dinitrogen trioxide) 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit skin, eyes, resp sys; epis; derm, skin sens; asthma; irrity, conf, 

dizz, head; abdom cramps, diarr, nau, vomit; liver, kidney inj 

TO: Eyes, skin, resp sys, CNS, CVS, liver, kidneys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

C 

Captafol Formula: 

C10H9Cl14NO2S 

CAS#: 

2425-06-1 

RTECS#: 

GW4900000 

IDLH: 

Ca [N.D.] 

Conversion: DOT: 

Synonyms/Trade Names: Captofol; Difolatan®; N-((1,1,2,2-Tetrachloroethyl)thio)-4-cyclohexene-1,2-dicarboximide 

Exposure Limits: 

NIOSH REL: Ca OSHA PEL†: none 

 TWA 0.1 mg/m3

 [skin] 

 See Appendix A 

Measurement Methods 

(see Table 1): 

NIOSH 0500 

Physical Description: White, crystalline solid with a slight, characteristic pungent odor. [fungicide] 

[Note: Available commercially as a wettable powder or in liquid form.] 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam/Daily 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Chemical & Physical Properties: 

MW: 349.1 

BP: Decomposes 

Sol: 0.0001% 

Fl.P: NA 

IP: NA 

Sp.Gr: ? 

VP: 0.000008 mmHg 

MLT: 321°F (Decomposes) 

UEL: NA 

LEL: NA 

Noncombustible Solid, but may be 

dissolved in flammable liquids. Incompatibilities and Reactivities: Acids, acid vapors, strong oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, resp sys; derm, skin sens; conj; bron, wheez; diarr, 

vomit; liver, kidney inj; high BP; in animals: terato effects; [carc] 

TO: Eyes, skin, resp sys, CNS, liver, kidneys, CVS [in animals: tumors at 

many sites] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

50
Captan Formula: 

C9H8Cl3NO2S 

CAS#: 

133-06-2 

RTECS#: 

GW5075000 

IDLH: 

Ca [N.D.] 

Conversion: DOT: 

Synonyms/Trade Names: Captane; N-Trichloromethylmercapto-4-cyclohexene-1,2-dicarboximide 

Exposure Limits: 

NIOSH REL: Ca OSHA PEL†: none 

 TWA 5 mg/m3

 

 See Appendix A 

Physical Description: Odorless, white, crystalline powder. [fungicide] 

[Note: Commercial product is a yellow powder with a pungent odor.] 

Measurement Methods 

(see Table 1): 

NIOSH 5601, 9202, 9205 

Chemical & Physical 

Properties: 

MW: 300.6 

BP: Decomposes 

Sol(77°F): 0.0003% 

Fl.P: ? 

IP: NA 

Sp.Gr: 1.74 

VP: 0 mmHg (approx) 

MLT: 352°F (Decomposes) 

UEL: ? 

LEL: ? 

Combustible Solid; may be 

dissolved in flammable liquids. 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam/Daily 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong alkaline materials (e.g., hydrated lime) [Note: Corrosive to metals.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, upper resp sys; blurred vision; derm, skin 

sens; dysp; diarr, vomit; [carc] 

TO: Eyes, skin, resp sys, GI tract, liver, kidneys [in animals: 

duodenal tumors] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

C 

Carbaryl Formula: 

CH3NHCOOC10H7

CAS#: 

63-25-2 

RTECS#: 

EC5950000 

IDLH: 

100 mg/m3

Conversion: DOT: 2757 151 

Synonyms/Trade Names: α-Naphthyl N-methyl-carbamate, 1-Naphthyl N-Methyl-carbamate, Sevin® 

Exposure Limits: 

NIOSH REL: TWA 5 mg/m3

OSHA PEL: TWA 5 mg/m3

Physical Description: White or gray, odorless solid. [pesticide] 

Measurement Methods 

(see Table 1): 

NIOSH 5006, 5601 

OSHA 63 

Chemical & Physical 

Properties: 

MW: 201.2 

BP: Decomposes 

Sol: 0.01% 

Fl.P: NA 

IP: ? 

Sp.Gr: 1.23 

VP(77°F): <0.00004 mmHg 

MLT: 293°F 

UEL: NA 

LEL: NA 

Noncombustible Solid, but may 

be dissolved in flammable liquids. 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

50 mg/m3

: Sa* 

100 mg/m3: Sa:Cf*/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, strongly alkaline pesticides 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Miosis, blurred vision, tear; rhin, salv; sweat; abdom cramps, nau, 

vomit, diarr; tremor; cyan; convuls; irrit skin; possible repro effects 

TO: Resp sys, CNS, CVS, skin, blood chol, repro sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 

51
Carbofuran Formula: 

C12H15NO3

CAS#: 

1563-66-2 

RTECS#: 

FB9450000 

IDLH: 

N.D. 

Conversion: DOT: 2757 151 

Synonyms/Trade Names: 2,3-Dihydro-2,2-dimethyl-7-benzofuranyl methylcarbamate; Furacarb®; Furadan® 

Exposure Limits: 

NIOSH REL: TWA 0.1 mg/m3

OSHA PEL†: none 

Physical Description: Odorless, white or grayish, crystalline solid. [insecticide] 

[Note: May be dissolved in a liquid carrier.] 

Measurement Methods 

(see Table 1): 

NIOSH 5601 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Chemical & Physical Properties: 

MW: 221.3 

BP: ? 

Sol(77°F): 0.07% 

Fl.P: NA 

IP: NA 

Sp.Gr: 1.18 

VP(77°F): 0.000003 mmHg 

MLT: 304°F 

UEL: NA 

LEL: NA 

Noncombustible Solid 

Incompatibilities and Reactivities: Alkaline substances, acid, 

strong oxidizers (e.g., perchlorates, peroxides, chlorates, nitrates, 

permanganates) 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Miosis, blurred vision; sweat, salv, abdom cramps, diarr, 

head, nau, vomit; lass, musc twitch, inco, convuls 

TO: CNS, PNS, blood chol 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap flush immed 

Breath: Fresh air 

Swallow: Medical attention immed 

C 

Carbon black Formula: 

C 

CAS#: 

1333-86-4 

RTECS#: 

FF5800000 

IDLH: 

1750 mg/m3

Conversion: DOT: 

Synonyms/Trade Names: Acetylene black, Channel black, Furnace black, Lamp black, Thermal black 

Exposure Limits: 

NIOSH REL: TWA 3.5 mg/m3 

 Carbon black in presence of polycyclic aromatic hydrocarbons (PAHs): 

 Ca 

 TWA 0.1 mg PAHs/m3

 

 See Appendix A 

 See Appendix C 

OSHA PEL: TWA 3.5 mg/m3

Physical Description: Black, odorless solid. 

Measurement Methods 

(see Table 1): 

NIOSH 5000 

OSHA ID196 

Chemical & Physical 

Properties: 

MW: 12.0 

BP: Sublimes 

Sol: Insoluble 

Fl.P: NA 

IP: NA 

Sp.Gr: 1.8-2.1 

VP: 0 mmHg (approx) 

MLT: Sublimes 

UEL: NA 

LEL: NA 

Combustible Solid that 

may contain flammable 

hydrocarbons. 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: Prevent eye contact 

Wash skin: Daily 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

17.5 mg/m3

: Qm 

35 mg/m3: 95XQ/Sa 

87.5 mg/m3

: Sa:Cf/PaprHie 

175 mg/m3: 100F/PaprTHie/ScbaF/SaF 

1750 mg/m3: Sa:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

In presence of polycyclic aromatic hydrocarbons: 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers such as chlorates, bromates & nitrates 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con 

SY: Cough; irrit eyes; in presence of polycyclic aromatic hydrocarbons: [carc] 

TO: Resp sys, eyes [lymphatic cancer (in presence of PAHs)] 

First Aid (see Table 6): 

Eye: Irr prompt 

Breath: Fresh air 

52
Carbon dioxide Formula: 

CO2

CAS#: 

124-38-9 

RTECS#: 

FF6400000 

IDLH: 

40,000 ppm 

Conversion: 1 ppm = 1.80 mg/m3 DOT: 1013 120; 1845 120 (dry ice); 2187 120 (liquid) 

Synonyms/Trade Names: Carbonic acid gas, Dry ice [Note: Normal constituent of air (about 300 ppm)]. 

Exposure Limits: 

NIOSH REL: TWA 5000 ppm (9000 mg/m3) 

 ST 30,000 ppm (54,000 mg/m3) 

OSHA PEL†: TWA 5000 ppm (9000 mg/m3

) 

Physical Description: Colorless, odorless gas. 

[Note: Shipped as a liquefied compressed gas. Solid form is utilized as dry ice.] 

Measurement Methods 

(see Table 1): 

NIOSH 6603 

OSHA ID172 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Frostbite 

Eyes: Frostbite 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Provide: Frostbite wash 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

40,000 ppm: Sa/ScbaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: ScbaE 

Chemical & Physical Properties: 

MW: 44.0 

BP: Sublimes 

Sol(77°F): 0.2% 

Fl.P: NA 

IP: 13.77 eV 

RGasD: 1.53 

VP: 56.5 atm 

MLT: -109°F (Sublimes) 

UEL: NA 

LEL: NA 

Nonflammable Gas 

Incompatibilities and Reactivities: Dusts of various metals, such as 

magnesium, zirconium, titanium, aluminum, chromium & manganese are 

ignitable and explosive when suspended in carbon dioxide. Forms carbonic 

acid in water. 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con (liquid/solid) 

SY: Head, dizz, restless, pares; dysp; sweat, mal; incr heart rate, card 

output, BP; coma; asphy; convuls; frostbite (liq, dry ice) 

TO: Resp sys, CVS 

First Aid (see Table 6): 

Eye: Frostbite 

Skin: Frostbite 

Breath: Resp support 

C 

Carbon disulfide Formula: 

CS2

CAS#: 

75-15-0 

RTECS#: 

FF6650000 

IDLH: 

500 ppm 

Conversion: 1 ppm = 3.11 mg/m3 DOT: 1131 131 

Synonyms/Trade Names: Carbon bisulfide 

Exposure Limits: 

NIOSH REL: TWA 1 ppm (3 mg/m3) 

 ST 10 ppm (30 mg/m3) [skin] 

OSHA PEL†: TWA 20 ppm 

 C 30 ppm 

 100 ppm (30-minute maximum peak) 

Physical Description: Colorless to faint-yellow liquid with a sweet ether-like odor. 

[Note: Reagent grades are foul smelling.] 

Measurement Methods 

(see Table 1): 

NIOSH 1600, 3800 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

10 ppm: CcrOv/Sa 

25 ppm: Sa:Cf/PaprOv 

50 ppm: CcrFOv/GmFOv/PaprTOv/ 

 ScbaF/SaF 

500 ppm: Sa:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Chemical & Physical 

Properties: 

MW: 76.1 

BP: 116°F 

Sol: 0.3% 

Fl.P: -22°F 

IP: 10.08 eV 

Sp.Gr: 1.26 

VP: 297 mmHg 

FRZ: -169°F 

UEL: 50.0% 

LEL: 1.3% 

Class IB Flammable Liquid 

Incompatibilities and Reactivities: Strong oxidizers; chemically-active metals 

such as sodium, potassium & zinc; azides; rust; halogens; amines 

[Note: Vapors may be ignited by contact with an ordinary light bulb.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Dizz, head, poor sleep, lass, anxi, anor, low-wgt; psychosis; 

polyneur; Parkinson-like syndrome; ocular changes; coronary heart 

disease; gastritis; kidney, liver inj; eye, skin burns; derm; repro effects 

TO: CNS, PNS, CVS, eyes, kidneys, liver, skin, repro sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

53
Carbon monoxide Formula: 

CO 

CAS#: 

630-08-0 

RTECS#: 

FG3500000 

IDLH: 

1200 ppm 

Conversion: 1 ppm = 1.15 mg/m3 DOT: 1016 119; 9202 168 (cryogenic liquid) 

Synonyms/Trade Names: Carbon oxide, Flue gas, Monoxide 

Exposure Limits: 

NIOSH REL: TWA 35 ppm (40 mg/m3) 

 C 200 ppm (229 mg/m3) 

OSHA PEL†: TWA 50 ppm (55 mg/m3

) 

Physical Description: Colorless, odorless gas. 

[Note: Shipped as a nonliquefied or liquefied compressed gas.] 

Measurement Methods 

(see Table 1): 

NIOSH 6604 

OSHA ID209, ID210 

Chemical & Physical 

Properties: 

MW: 28.0 

BP: -313°F 

Sol: 2% 

Fl.P: NA (Gas) 

IP: 14.01 eV 

RGasD: 0.97 

VP: >35 atm 

MLT: -337°F 

UEL: 74% 

LEL: 12.5% 

Flammable Gas 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Frostbite 

Eyes: Frostbite 

Wash skin: N.R. 

Remove: When wet (flamm) 

Change: N.R. 

Provide: Frostbite wash 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

350 ppm: Sa 

875 ppm: Sa:Cf 

1200 ppm: GmFS†/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFS†/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, bromine trifluoride, chlorine trifluoride, lithium 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con (liquid) 

SY: Head, tachypnea, nau, lass, dizz, conf, halu; cyan; depres S-T segment 

of electrocardiogram, angina, syncope 

TO: CVS, lungs, blood, CNS 

First Aid (see Table 6): 

Eye: Frostbite 

Skin: Frostbite 

Breath: Resp support 

C 

Carbon tetrabromide Formula: 

CBr4

CAS#: 

558-13-4 

RTECS#: 

FG4725000 

IDLH: 

N.D. 

Conversion: 1 ppm = 13.57 mg/m3 DOT: 2516 151 

Synonyms/Trade Names: Carbon bromide, Methane tetrabromide, Tetrabromomethane 

Exposure Limits: 

NIOSH REL: TWA 0.1 ppm (1.4 mg/m3

) 

 ST 0.3 ppm (4 mg/m3

) 

OSHA PEL†: none 

Physical Description: Colorless to yellow-brown crystals with a slight odor. 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical Properties: 

MW: 331.7 

BP: 374°F 

Sol: 0.02% 

Fl.P: NA 

IP: 10.31 eV 

Sp.Gr: 3.42 

VP(205°F): 40 mmHg 

MLT: 194°F 

UEL: NA 

LEL: NA 

Noncombustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: Prevent eye contact 

Wash skin: Daily 

Remove: N.R. 

Change: Daily 

Provide: Eyewash 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Strong oxidizers, hexacyclohexyldilead, lithium 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, resp sys; lac; lung, liver, kidney inj; 

in animals: corn damage 

TO: Eyes, skin, resp sys, liver, kidneys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 

54
Carbon tetrachloride Formula: 

CCl4

CAS#: 

56-23-5 

RTECS#: 

FG4900000 

IDLH: 

Ca [200 ppm] 

Conversion: 1 ppm = 6.29 mg/m3 DOT: 1846 151 

Synonyms/Trade Names: Carbon chloride, Carbon tet, Freon® 10, Halon® 104, Tetrachloromethane 

Exposure Limits: 

NIOSH REL: Ca 

 ST 2 ppm (12.6 mg/m3

) [60-minute] 

 See Appendix A 

OSHA PEL†: TWA 10 ppm 

 C 25 ppm 

 200 ppm (5-minute maximum peak in any 4 hours) 

Physical Description: Colorless liquid with a characteristic ether-like odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1003 

OSHA 7 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Chemical & Physical Properties: 

MW: 153.8 

BP: 170°F 

Sol: 0.05% 

Fl.P: NA 

IP: 11.47 eV 

Sp.Gr: 1.59 

VP: 91 mmHg 

FRZ: -9°F 

UEL: NA 

LEL: NA 

Noncombustible Liquid 

Incompatibilities and Reactivities: Chemically-active metals such as 

sodium, potassium & magnesium; fluorine; aluminum [Note: Forms highly 

toxic phosgene gas when exposed to flames or welding arcs.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin; CNS depres; nau, vomit; liver, kidney inj; drow, dizz, 

inco; [carc] 

TO: CNS, eyes, lungs, liver, kidneys, skin [in animals: liver cancer] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

C 

Carbonyl fluoride Formula: 

COF2

CAS#: 

353-50-4 

RTECS#: 

FG6125000 

IDLH: 

N.D. 

Conversion: 1 ppm = 2.70 mg/m3 DOT: 2417 125 

Synonyms/Trade Names: Carbon difluoride oxide, Carbon fluoride oxide, Carbon oxyfluoride, Carbonyl difluoride, 

Fluoroformyl fluoride, Fluorophosgene 

Exposure Limits: 

NIOSH REL: TWA 2 ppm (5 mg/m3

) 

 ST 5 ppm (15 mg/m3

) 

OSHA PEL†: none 

Physical Description: Colorless gas with a pungent and very irritating odor. 

[Note: Shipped as a liquefied compressed gas.] 

Measurement Methods 

(see Table 1): 

None available 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Frostbite 

Eyes: Frostbite 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Provide: Frostbite wash 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Chemical & Physical Properties: 

MW: 66.0 

BP: -118°F 

Sol: Reacts 

Fl.P: NA 

IP: 13.02 eV 

RGasD: 2.29 

VP: 55.4 atm 

FRZ: -173°F 

UEL: NA 

LEL: NA 

Nonflammable Gas 

Incompatibilities and Reactivities: Heat, moisture, 

hexafluoroisopropylideneamino-lithium 

[Note: Reacts with water to form hydrogen fluoride & carbon dioxide.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con 

SY: Irrit eyes, skin, muc memb, resp sys; eye, skin burns; lac; cough, 

pulm edema, dysp; chronic exposure: GI pain, musc fib, skeletal 

fluorosis; liquid: frostbite 

TO: Eyes, skin, resp sys, bone 

First Aid (see Table 6): 

Eye: Frostbite 

Skin: Frostbite 

Breath: Resp support 

55
Catechol Formula: 

C6H4(OH)2

CAS#: 

120-80-9 

RTECS#: 

UX1050000 

IDLH: 

N.D. 

Conversion: 1 ppm = 4.50 mg/m3 DOT: 

Synonyms/Trade Names: 1,2-Benzenediol; o-Benzenediol; 1,2-Dihydroxybenzene; o-Dihydroxybenzene; 

2-Hydroxyphenol; Pyrocatechol 

Exposure Limits: 

NIOSH REL: TWA 5 ppm (20 mg/m3

) [skin] 

OSHA PEL†: none 

Physical Description: Colorless, crystalline solid with a faint odor. 

[Note: Discolors to brown in air & light.] 

Measurement Methods 

(see Table 1): 

OSHA PV2014 

Chemical & Physical Properties: 

MW: 110.1 

BP: 474°F 

Sol: 44% 

Fl.P: 261°F 

IP: ? 

Sp.Gr: 1.34 

VP(244°F): 10 mmHg 

MLT: 221°F 

UEL: ? 

LEL: 1.4% 

Combustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Strong oxidizers, nitric acid 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, resp sys; skin sens, derm; lac, burns eyes; 

convuls, incr BP, kidney inj 

TO: Eyes, skin, resp sys, CNS, kidneys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

C 

Cellulose Formula: 

(C6H10O5)n

CAS#: 

9004-34-6 

RTECS#: 

FJ5691460 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: Hydroxycellulose, Pyrocellulose 

Exposure Limits: 

NIOSH REL: TWA 10 mg/m3

 (total) 

 TWA 5 mg/m3

 (resp) 

OSHA PEL: TWA 15 mg/m3

 (total) 

 TWA 5 mg/m3

 (resp) 

Measurement Methods 

(see Table 1): 

NIOSH 0500, 0600, 7404 

Physical Description: Odorless, white substance. 

[Note: The principal fiber cell wall material of vegetable tissues (wood, cotton, flax, grass, etc.).] 

Chemical & Physical Properties: 

MW: 160,000-560,000 

BP: Decomposes 

Sol: Insoluble 

Fl.P: NA 

IP: NA 

Sp.Gr: 1.27-1.61 

VP: 0 mmHg (approx) 

MLT: 500-518°F (Decomposes) 

UEL: NA 

LEL: NA 

Combustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Water, bromine pentafluoride, sodium nitrate, fluorine, strong oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con 

SY: Irrit eyes, skin, muc memb 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash 

Breath: Fresh air 

56
Cesium hydroxide Formula: 

CsOH 

CAS#: 

21351-79-1 

RTECS#: 

FK9800000 

IDLH: 

N.D. 

Conversion: DOT: 2682 157; 2681 154 (solution) 

Synonyms/Trade Names: Cesium hydrate, Cesium hydroxide dimer 

Exposure Limits: 

NIOSH REL: TWA 2 mg/m3 

OSHA PEL†: none 

Physical Description: Colorless or yellowish, crystalline solid. 

[Note: Hygroscopic (i.e., absorbs moisture from the air).] 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical Properties: 

MW: 149.9 

BP: ? 

Sol(59°F): 395% 

Fl.P: NA 

IP: NA 

Sp.Gr: 3.68 

VP: 0 mmHg (approx) 

MLT: 522°F 

UEL: NA 

LEL: NA 

Noncombustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Water, acids, CO2, metals (e.g., Al, Pb, Sn, Zn), oxygen 

[Note: CsOH is a strong base, causing the generation of considerable heat in contact with water or moisture.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, upper resp sys; eye, skin burns 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

C 

Chlordane Formula: 

C10H6Cl8

CAS#: 

57-74-9 

RTECS#: 

PB9800000 

IDLH: 

Ca [100 mg/m3

] 

Conversion: DOT: 2996 151 

Synonyms/Trade Names: Chlordan; Chlordano; 

1,2,4,5,6,7,8,8-Octachloro-3a,4,7,7a-tetrahydro-4,7-methanoindane 

Exposure Limits: 

NIOSH REL: Ca 

 TWA 0.5 mg/m3

 [skin] 

 See Appendix A 

OSHA PEL: TWA 0.5 mg/m3 [skin] 

Measurement Methods 

(see Table 1): 

NIOSH 5510 

OSHA 67 

Physical Description: Amber-colored, viscous liquid with a pungent, chlorine-like odor. [insecticide] 

Chemical & Physical Properties: 

MW: 409.8 

BP: Decomposes 

Sol: 0.0001% 

Fl.P: NA 

IP: ? 

Sp.Gr(77°F): 1.6 

VP: 0.00001 mmHg 

FRZ: 217-228°F 

UEL: NA 

LEL: NA 

Noncombustible Liquid, but may be 

utilized in flammable solutions. 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, alkaline reagents 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Blurred vision; conf; ataxia, delirium; cough; abdom pain, nau, 

vomit, diarr; irrity, tremor, convuls; anuria; in animals: lung, liver, kidney 

damage; [carc] 

TO: CNS, eyes, lungs, liver, kidneys [in animals: liver cancer] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

57
C 

Chlorinated camphene Formula: 

C10H10Cl8

CAS#: 

8001-35-2 

RTECS#: 

XW5250000 

IDLH: 

Ca [200 mg/m3

] 

Conversion: DOT: 2761 151 

Synonyms/Trade Names: Chlorocamphene, Octachlorocamphene, Polychlorocamphene, Toxaphene 

Exposure Limits: 

NIOSH REL: Ca [skin] 

 See Appendix A 

OSHA PEL†: TWA 0.5 mg/m3

 [skin] 

Physical Description: Amber, waxy solid with a mild, piney, chlorine- and camphorlike odor. [insecticide] 

Measurement Methods 

(see Table 1): 

NIOSH 5039 

Chemical & Physical 

Properties: 

MW: 413.8 

BP: Decomposes 

Sol: 0.0003% 

Fl.P: NA 

IP: ? 

Sp.Gr: 1.65 

VP(77°F): 0.4 mmHg 

MLT: 149-194°F 

UEL: NA 

LEL: NA 

Noncombustible Solid, but may 

be dissolved in flammable liquids. 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam/Daily 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers [Note: Slightly corrosive to metals under moist conditions.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Nau, conf, agitation, tremor, convuls, uncon; dry, red skin; [carc] 

TO: CNS, skin [in animals: liver cancer] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 

Chlorinated diphenyl oxide Formula: 

C12H10-nClnO 

CAS#: RTECS#: IDLH: 

5 mg/m3

Conversion: DOT: 

Synonyms/Trade Names: Synonyms depend on the degree of chlorination of diphenyl oxide [(C6H5)2O], ranging 

from monochlorodiphenyl oxide [(C6H4Cl)O(C6H5)] to decachlorodiphenyl oxide [(C6Cl5)O(C6Cl5)]. 

Exposure Limits: 

NIOSH REL: TWA 0.5 mg/m3

OSHA PEL: TWA 0.5 mg/m3

Physical Description: Appearance and odor vary depending upon the specific 

compound. 

Measurement Methods 

(see Table 1): 

NIOSH 5025 

Chemical & Physical 

Properties: 

Properties vary depending 

upon the specific compound. 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

5 mg/m3

: Sa/ScbaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOvAg100/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Acne-form derm, liver damage 

TO: Skin, liver 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 

58
Chlorine Formula: 

Cl2

CAS#: 

7782-50-5 

RTECS#: 

FO2100000 

IDLH: 

10 ppm 

Conversion: 1 ppm = 2.90 mg/m3 DOT: 1017 124 

Synonyms/Trade Names: Molecular chlorine 

Exposure Limits: 

NIOSH REL: C 0.5 ppm (1.45 mg/m3) [15-minute] 

OSHA PEL†: C 1 ppm (3 mg/m3

) 

Physical Description: Greenish-yellow gas with a pungent, irritating odor. 

[Note: Shipped as a liquefied compressed gas.] 

Measurement Methods 

(see Table 1): 

NIOSH 6011 

OSHA ID101, ID126SGX 

Chemical & Physical Properties: 

MW: 70.9 

BP: -29°F 

Sol: 0.7% 

Fl.P: NA 

IP: 11.48 eV 

RGasD: 2.47 

VP: 6.8 atm 

FRZ: -150°F 

UEL: NA 

LEL: NA 

Nonflammable Gas, but a strong 

oxidizer. 

Personal Protection/Sanitation

(see Table 2): 

Skin: Frostbite 

Eyes: Frostbite 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Provide: Frostbite wash 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

5 ppm: CcrS*/Sa* 

10 ppm: Sa:Cf*/PaprS*/CcrFS/GmFS/ 

 ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFS/ScbaE 

Incompatibilities and Reactivities: Reacts explosively or forms explosive compounds with many common 

substances such as acetylene, ether, turpentine, ammonia, fuel gas, hydrogen & finely divided metals. 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con 

SY: Burning of eyes, nose, mouth; lac, rhin; cough, choking, subs pain; nau, 

vomit; head, dizz; syncope; pulm edema; pneu; hypox; derm; liquid: frostbite 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Frostbite 

Skin: Frostbite 

Breath: Resp support 

C 

Chlorine dioxide Formula: 

ClO2

CAS#: 

10049-04-4 

RTECS#: 

FO3000000 

IDLH: 

5 ppm 

Conversion: 1 ppm = 2.76 mg/m3 DOT: 9191 143 (hydrate, frozen) 

Synonyms/Trade Names: Chlorine oxide, Chlorine peroxide 

Exposure Limits: 

NIOSH REL: TWA 0.1 ppm (0.3 mg/m3

) 

 ST 0.3 ppm (0.9 mg/m3

) 

OSHA PEL†: TWA 0.1 ppm (0.3 mg/m3

) 

Physical Description: Yellow to red gas or a red-brown liquid (below 52°F) with an 

unpleasant odor similar to chlorine and nitric acid. 

Measurement Methods 

(see Table 1): 

OSHA ID126SGX, ID202 

Chemical & Physical Properties: 

MW: 67.5 

BP: 52°F 

Sol(77°F): 0.3% 

Fl.P: NA (Gas) ? (Liquid) 

IP: 10.36 eV 

RGasD: 2.33 

Sp.Gr: 1.6 (Liquid at 32°F) 

VP: >1 atm 

FRZ: -74°F 

UEL: ? 

LEL: ? 

Flammable Gas, Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact (liquid) 

Eyes: Prevent eye contact (liquid) 

Wash skin: When contam (liquid) 

Remove: When wet (flamm) 

Change: N.R. 

Provide: Eyewash (liquid) 

 Quick drench (liquid) 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

1 ppm: CcrS/Sa 

2.5 ppm: Sa:Cf£/PaprS£ 

5 ppm: CcrFS/GmFS/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFS¿/ScbaE 

Incompatibilities and Reactivities: Organic materials, heat, phosphorus, potassium hydroxide, sulfur, mercury, 

carbon monoxide [Note: Unstable in light. A powerful oxidizer.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing (liquid), Con 

SY: Irrit eyes, nose, throat; cough, wheez, bron, pulm edema; 

chronic bron 

TO: Eyes, resp sys 

First Aid (see Table 6): 

Eye: Irr immed (liquid) 

Skin: Soap wash immed (liquid) 

Breath: Resp support 

Swallow: Medical attention immed (liquid) 

59
Chlorine trifluoride Formula: 

ClF3

CAS#: 

7790-91-2 

RTECS#: 

FO2800000 

IDLH: 

20 ppm 

Conversion: 1 ppm = 3.78 mg/m3 DOT: 1749 124 

Synonyms/Trade Names: Chlorine fluoride, Chlorotrifluoride 

Exposure Limits: 

NIOSH REL: C 0.1 ppm (0.4 mg/m3) 

OSHA PEL: C 0.1 ppm (0.4 mg/m3

) 

Physical Description: Colorless gas or a greenish-yellow liquid (below 53°F) with a 

somewhat sweet, suffocating odor. [Note: Shipped as a liquefied compressed gas.] 

Measurement Methods 

(see Table 1): 

None available 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam (liquid) 

Remove: When wet or 

 contam (liquid) 

Change: N.R. 

Provide: Eyewash (liquid) 

 Quick drench (liquid) 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

2.5 ppm: Sa:Cf£ 

5 ppm: ScbaF/SaF 

20 ppm: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFS/ScbaE 

Chemical & Physical Properties: 

MW: 92.5 

BP: 53°F 

Sol: Reacts 

Fl.P: NA 

IP: 13.00 eV 

RGasD: 3.21 

Sp.Gr: 1.77 (Liquid at 53°F) 

VP: 1.4 atm 

FRZ: -105°F 

UEL: NA 

LEL: NA 

Nonflammable Gas 

Noncombustible Liquid, but contact 

with organic materials may result in 

SPONTANEOUS ignition. 

Incompatibilities and Reactivities: Oxidizers, water, acids, combustible 

materials, sand, glass, metals (corrosive) 

[Note: Reacts with water to form chlorine & hydrofluoric acid.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing (liquid), Con 

SY: Eye, skin burns (liq or high vap conc); resp irrit; in animals: 

lac, corn ulcer; pulm edema 

TO: Skin, eyes, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed (liquid) 

C 

Chloroacetaldehyde Formula: 

ClCH2CHO 

CAS#: 

107-20-0 

RTECS#: 

AB2450000 

IDLH: 

45 ppm 

Conversion: 1 ppm = 3.21 mg/m3 DOT: 2232 153 

Synonyms/Trade Names: Chloroacetaldehyde (40% aqueous solution), 2-Chloroacetaldehyde, 2-Chloroethanal 

Exposure Limits: 

NIOSH REL: C 1 ppm (3 mg/m3

) 

OSHA PEL: C 1 ppm (3 mg/m3

) 

Physical Description: Colorless liquid with an acrid, penetrating odor. 

[Note: Typically found as a 40% aqueous solution.] 

Measurement Methods 

(see Table 1): 

NIOSH 2015 

OSHA 76 

Chemical & Physical 

Properties: 

MW: 78.5 

BP: 186°F 

Sol: Miscible 

Fl.P: 190°F (40% solution) 

IP: 10.61 eV 

Sp.Gr: 1.19 (40% solution) 

VP: 100 mmHg 

FRZ: -3°F (40% solution) 

UEL: ? 

LEL: ? 

Class IIIA Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

10 ppm: CcrOv*/Sa* 

25 ppm: Sa:Cf*/PaprOv* 

45 ppm: CcrFOv/GmFOv/PaprTOv*/ 

 ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Oxidizers, acids 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit skin, eyes, muc memb; skin burns; eye damage; pulm 

edema; skin, resp sys sens 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

60
α-Chloroacetophenone Formula: 

C6H5COCH2Cl 

CAS#: 

532-27-4 

RTECS#: 

AM6300000 

IDLH: 

15 mg/m3

Conversion: 1 ppm = 6.32 mg/m3 DOT: 1697 153 

Synonyms/Trade Names: 2-Chloroacetophenone, Chloromethyl phenyl ketone, Mace®, Phenacyl chloride, 

Phenyl chloromethyl ketone, Tear gas 

Exposure Limits: 

NIOSH REL: TWA 0.3 mg/m3

 (0.05 ppm) 

OSHA PEL: TWA 0.3 mg/m3 (0.05 ppm) 

Physical Description: Colorless to gray crystalline solid with a sharp, irritating odor. 

Measurement Methods 

(see Table 1): 

NIOSH P&CAM291 (II-5) 

Chemical & Physical 

Properties: 

MW: 154.6 

BP: 472°F 

Sol: Insoluble 

Fl.P: 244°F 

IP: 9.44 eV 

Sp.Gr: 1.32 

VP: 0.005 mmHg 

MLT: 134°F 

UEL: ? 

LEL: ? 

Combustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

3 mg/m3

: CcrOv95/Sa 

7.5 mg/m3

: Sa:Cf£/PaprOvHie£ 

15 mg/m3

: CcrFOv100/GmFS100/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFS100/ScbaE 

Incompatibilities and Reactivities: Water, steam, strong oxidizers [Note: Slowly corrodes metals.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, resp sys; pulm edema 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

C 

Chloroacetyl chloride Formula: 

ClCH2COCl 

CAS#: 

79-04-9 

RTECS#: 

AO6475000 

IDLH: 

N.D. 

Conversion: 1 ppm = 4.62 mg/m3 DOT: 1752 156 

Synonyms/Trade Names: Chloroacetic acid chloride, Chloroacetic chloride, Monochloroacetyl chloride 

Exposure Limits: 

NIOSH REL: TWA 0.05 ppm (0.2 mg/m3

) 

OSHA PEL†: none 

Physical Description: Colorless to yellowish liquid with a strong, pungent odor. 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical Properties: 

MW: 112.9 

BP: 223°F 

Sol: Decomposes 

Fl.P: NA 

IP: 10.30 eV 

Sp.Gr: 1.42 

VP: 19 mmHg 

FRZ: -7°F 

UEL: NA 

LEL: NA 

Noncombustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Water, alcohols, bases, metals (corrosive), amines 

[Note: Decomposes in water to form chloroacetic acid & hydrogen chloride gas.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, resp sys; eye, skin burns; cough, wheez, dysp; lac 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

61
Chlorobenzene Formula: 

C6H5Cl 

CAS#: 

108-90-7 

RTECS#: 

CZ0175000 

IDLH: 

1000 ppm 

Conversion: 1 ppm = 4.61 mg/m3 DOT: 1134 130 

Synonyms/Trade Names: Benzene chloride, Chlorobenzol, MCB, Monochlorobenzene, Phenyl chloride 

Exposure Limits: 

NIOSH REL: See Appendix D 

OSHA PEL: TWA 75 ppm (350 mg/m3

) 

Physical Description: Colorless liquid with an almond-like odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1003 

OSHA 7 

Chemical & Physical 

Properties: 

MW: 112.6 

BP: 270°F 

Sol: 0.05% 

Fl.P: 82°F 

IP: 9.07 eV 

Sp.Gr: 1.11 

VP: 9 mmHg 

FRZ: -50°F 

UEL: 9.6% 

LEL: 1.3% 

Class IC Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

OSHA 

1000 ppm: Sa:Cf£/PaprOv£/CcrFOv/ 

 GmFOv/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, nose; drow, inco; CNS depres; in animals: 

liver, lung, kidney inj 

TO: Eyes, skin, resp sys, CNS, liver 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 

C 

o-Chlorobenzylidene malononitrile Formula: 

ClC6H4CH=C(CN)2

CAS#: 

2698-41-1 

RTECS#: 

OO3675000 

IDLH: 

2 mg/m3

Conversion: 1 ppm = 7.71 mg/m3 DOT: 2810 153 

Synonyms/Trade Names: 2-Chlorobenzalmalonitrile, CS, OCBM 

Exposure Limits: 

NIOSH REL: C 0.05 ppm (0.4 mg/m3

) [skin] 

OSHA PEL†: TWA 0.05 ppm (0.4 mg/m3

) 

Physical Description: White crystalline solid with a pepper-like odor. 

Measurement Methods 

(see Table 1): 

NIOSH P&CAM304 (II-5) 

Chemical & Physical 

Properties: 

MW: 188.6 

BP: 590-599°F 

Sol: Insoluble 

Fl.P: ? 

IP: ? 

Sp.Gr: ? 

VP: 0.00003 mmHg 

MLT: 203-205°F 

UEL: ? 

LEL: ? 

MEC: 25 g/m3

Combustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam/Daily 

Remove: When wet or contam 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

2 mg/m3: Sa:Cf£/GmFS100/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFS100/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Pain, burn eyes, lac, conj; eryt eyelids, blepharospasm; irrit 

throat, cough, chest tight; head; eryt, vesic skin 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

62
Chlorobromomethane Formula: 

CH2BrCl 

CAS#: 

74-97-5 

RTECS#: 

PA5250000 

IDLH: 

2000 ppm 

Conversion: 1 ppm = 5.29 mg/m3 DOT: 1887 160 

Synonyms/Trade Names: Bromochloromethane, CB, CBM, Fluorocarbon 1011, Halon® 1011, 

Methyl chlorobromide 

Exposure Limits: 

NIOSH REL: TWA 200 ppm (1050 mg/m3

) 

OSHA PEL: TWA 200 ppm (1050 mg/m3) 

Physical Description: Colorless to pale-yellow liquid with a chloroform-like odor. 

[Note: May be used as a fire extinguishing agent.] 

Measurement Methods 

(see Table 1): 

NIOSH 1003 

Chemical & Physical 

Properties: 

MW: 129.4 

BP: 155°F 

Sol: Insoluble 

Fl.P: NA 

IP: 10.77 eV 

Sp.Gr: 1.93 

VP: 115 mmHg 

FRZ: -124°F 

UEL: NA 

LEL: NA 

Noncombustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

2000 ppm: Sa:Cf£/PaprOv£/CcrFOv/ 

 GmFOv/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Chemically-active metals such as calcium, powdered aluminum, zinc, and 

magnesium 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, throat; conf, dizz, CNS depres; pulm edema 

TO: Eyes, skin, resp sys, liver, kidneys, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 

C 

Chlorodifluoromethane Formula: 

CHClF2

CAS#: 

75-45-6 

RTECS#: 

PA6390000 

IDLH: 

N.D. 

Conversion: 1 ppm = 3.54 mg/m3 DOT: 1018 126 

Synonyms/Trade Names: Difluorochloromethane, Fluorocarbon-22, Freon® 22, Genetron® 22, 

Monochlorodifluoromethane, Refrigerant 22 

Exposure Limits: 

NIOSH REL: TWA 1000 ppm (3500 mg/m3

) 

 ST 1250 ppm (4375 mg/m3

) 

OSHA PEL†: none 

Physical Description: Colorless gas with a faint, sweetish odor. 

[Note: Shipped as a liquefied compressed gas.] 

Measurement Methods 

(see Table 1): 

NIOSH 1018 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Frostbite 

Eyes: Frostbite 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Provide: Frostbite wash 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Chemical & Physical Properties: 

MW: 86.5 

BP: -41°F 

Sol(77°F): 0.3% 

Fl.P: NA 

IP: 12.45 eV 

RGasD: 3.11 

VP: 9.4 atm 

FRZ: -231°F 

UEL: NA 

LEL: NA 

Nonflammable Gas Incompatibilities and Reactivities: Alkalis, alkaline earth metals (e.g., 

powdered aluminum, sodium, potassium, zinc) 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con (liquid) 

SY: Irrit resp sys; conf, drow, ringing in ears; heart palp, card 

arrhy; asphy; liver, kidney, spleen inj; liquid: frostbite 

TO: Resp sys, CVS, CNS, liver, kidneys, spleen 

First Aid (see Table 6): 

Eye: Frostbite 

Skin: Frostbite 

Breath: Resp support 

63
64

CAS#: RTECS#: 

TQ1356000 

IDLH: 

Ca [5 mg/m3] Chlorodiphenyl (42% chlorine) Formula: 

C6H4ClC6H3Cl2 (approx) 53469-21-9 

Conversion: DOT: 2315 171 

Synonyms/Trade Names: Aroclor® 1242, PCB, Polychlorinated biphenyl C Exposure Limits: 

NIOSH REL*: Ca OSHA PEL: TWA 1 mg/m3 [skin] 

 TWA 0.001 mg/m3 

 See Appendix A 

 [*Note: The REL also applies to other PCBs.] 

Measurement Methods 

(see Table 1): 

NIOSH 5503 

OSHA PV2089 

Physical Description: Colorless to light-colored, viscous liquid with a mild, hydrocarbon odor. 

Chemical & Physical Properties: 

MW: 258 (approx) 

BP: 617-691°F 

Sol: Insoluble 

Fl.P: NA 

IP: ? 

Sp.Gr(77°F): 1.39 

VP: 0.001 mmHg 

FRZ: -2°F 

UEL: NA 

LEL: NA 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Nonflammable Liquid, but exposure in a fire results in the formation of a black soot containing PCBs, 

polychlorinated dibenzofurans & chlorinated dibenzo-p-dioxins.

Incompatibilities and Reactivities: Strong oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes; chloracne; liver damage; repro effects; [carc] 

TO: Skin, eyes, liver, repro sys [in animals: tumors of the pituitary 

gland & liver, leukemia] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

Chlorodiphenyl (54% chlorine) Formula: 

C6H3Cl2C6H2Cl3 (approx) 

CAS#: 

11097-69-1 

RTECS#: 

TQ1360000 

IDLH: Ca 

 [5 mg/m3]

Conversion: DOT: 2315 171 

Synonyms/Trade Names: Aroclor® 1254, PCB, Polychlorinated biphenyl 

Exposure Limits: 

NIOSH REL*: Ca OSHA PEL: TWA 0.5 mg/m3

 [skin] 

 TWA 0.001 mg/m3

 

 See Appendix A 

 [*Note: The REL also applies to other PCBs.] 

Measurement Methods 

(see Table 1): 

NIOSH 5503 

OSHA PV2088 

Physical Description: Colorless to pale-yellow, viscous liquid or solid (below 50°F) with a mild, hydrocarbon odor. 

Chemical & Physical Properties: 

MW: 326 (approx) 

BP: 689-734°F 

Sol: Insoluble 

Fl.P: NA 

IP: ? 

Sp.Gr(77°F): 1.38 

VP: 0.00006 mmHg 

FRZ: 50°F 

UEL: NA 

LEL: NA 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Nonflammable Liquid, but exposure in a fire results in the formation of a black soot containing PCBs, 

polychlorinated dibenzofurans, and chlorinated dibenzo-p-dioxins.

Incompatibilities and Reactivities: Strong oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, chloracne; liver damage; repro effects; [carc] 

TO: Skin, eyes, liver, repro sys [in animals: tumors of the pituitary 

gland & liver, leukemia] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 
Chloroform Formula: 

CHCl3

CAS#: 

67-66-3 

RTECS#: 

FS9100000 

IDLH: 

Ca [500 ppm] 

Conversion: 1 ppm = 4.88 mg/m3 DOT: 1888 151 

Synonyms/Trade Names: Methane trichloride, Trichloromethane 

Exposure Limits: 

NIOSH REL: Ca 

 ST 2 ppm (9.78 mg/m3

) [60-minute] 

 See Appendix A 

OSHA PEL†: C 50 ppm (240 mg/m3) 

Physical Description: Colorless liquid with a pleasant odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1003 

Chemical & Physical 

Properties: 

MW: 119.4 

BP: 143°F 

Sol(77°F): 0.5% 

Fl.P: NA 

IP: 11.42 eV 

Sp.Gr: 1.48 

VP: 160 mmHg 

FRZ: -82°F 

UEL: NA 

LEL: NA 

Noncombustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong caustics; chemically-active metals such as aluminum or magnesium 

powder, sodium & potassium; strong oxidizers [Note: When heated to decomposition, forms phosgene gas.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin; dizz, mental dullness, nau, conf; head, lass; anes; 

enlarged liver; [carc] 

TO: Liver, kidneys, heart, eyes, skin, CNS [in animals: liver & kidney cancer] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 

C 

bis-Chloromethyl ether Formula: 

(CH2Cl)2O 

CAS#: 

542-88-1 

RTECS#: 

KN1575000 

IDLH: 

Ca [N.D.] 

Conversion: DOT: 2249 131 

Synonyms/Trade Names: BCME, bis-CME, Chloromethyl ether, Dichlorodimethyl ether, Dichloromethyl ether, 

Oxybis(chloromethane) 

Exposure Limits: 

NIOSH REL: Ca OSHA PEL: [1910.1008] 

 See Appendix A See Appendix B 

Physical Description: Colorless liquid with a suffocating odor. 

Measurement Methods 

(see Table 1): 

OSHA 10 

Chemical & Physical Properties: 

MW: 115.0 

BP: 223°F 

Sol: Reacts 

Fl.P: <66°F 

IP: ? 

Sp.Gr: 1.32 

VP(72°F): 30 mmHg 

FRZ: -43°F 

UEL: ? 

LEL: ? 

Class IB Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam/Daily 

Remove: When wet (flamm) 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

See Appendix E (page 351) 

Incompatibilities and Reactivities: Acids, water 

[Note: Reacts with water to form hydrochloric acid & formaldehyde.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, muc memb, resp sys; pulm congestion, edema; corn 

damage, nec; decr pulm function, cough, dysp, wheez; blood-stained 

sputum, bronchial secretions; [carc] 

TO: Eyes, skin, resp sys [lung cancer] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

65
C 

Chloromethyl methyl ether Formula: 

CH3OCH2Cl 

CAS#: 

107-30-2 

RTECS#: 

KN6650000 

IDLH: 

Ca [N.D.] 

Conversion: DOT: 1239 131 

Synonyms/Trade Names: Chlorodimethyl ether, Chloromethoxymethane, CMME, Dimethylchloroether, 

Methylchloromethyl ether 

Exposure Limits: 

NIOSH REL: Ca 

 See Appendix A 

OSHA PEL: [1910.1006] 

 See Appendix B 

Physical Description: Colorless liquid with an irritating odor. 

Measurement Methods 

(see Table 1): 

NIOSH P&CAM220 (II-1) 

OSHA 10 

Chemical & Physical 

Properties: 

MW: 80.5 

BP: 138°F 

Sol: Reacts 

Fl.P(oc): 32°F 

IP: 10.25 eV 

Sp.Gr: 1.06 

VP(70°F): 192 mmHg 

FRZ: -154°F 

UEL: ? 

LEL: ? 

Class IB Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam/Daily 

Remove: When wet (flamm) 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

See Appendix E (page 351) 

Incompatibilities and Reactivities: Water [Note: Reacts with water to form hydrochloric acid & formaldehyde.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, muc memb; pulm edema, pulm congestion, pneu; 

skin burns, nec; cough, wheez, pulm congestion; blood stainedsputum; low-wgt; bronchial secretions; [carc] 

TO: Eyes, skin, resp sys [in animals: skin & lung cancer] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

1-Chloro-1-nitropropane Formula: 

CH3CH2CHClNO2

CAS#: 

600-25-9 

RTECS#: 

TX5075000 

IDLH: 

100 ppm 

Conversion: 1 ppm = 5.06 mg/m3 DOT: 

Synonyms/Trade Names: Korax®, Lanstan® 

Exposure Limits: 

NIOSH REL: TWA 2 ppm (10 mg/m3

) 

OSHA PEL†: TWA 20 ppm (100 mg/m3

) 

Physical Description: Colorless liquid with an unpleasant odor. [fungicide] 

Measurement Methods 

(see Table 1): 

NIOSH S211 (II-5) 

Chemical & Physical 

Properties: 

MW: 123.6 

BP: 289°F 

Sol: 0.5% 

Fl.P(oc): 144°F 

IP: 9.90 eV 

Sp.Gr: 1.21 

VP(77°F): 6 mmHg 

FRZ: ? 

UEL: ? 

LEL: ? 

Class IIIA Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

20 ppm: Sa* 

50 ppm: Sa:Cf*/PaprOv* 

100 ppm: CcrFOv/GmFOv/PaprTOv*/ 

 ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, acids 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: In animals: irrit eyes; pulm edema; liver, kidney, heart damage 

TO: Resp sys, liver, kidneys, CVS, eyes 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash 

Breath: Resp support 

Swallow: Medical attention immed 

66
Chloropentafluoroethane Formula: 

CClF2CF3

CAS#: 

76-15-3 

RTECS#: 

KH7877500 

IDLH: 

N.D. 

Conversion: 1 ppm = 6.32 mg/m3 DOT: 1020 126 

Synonyms/Trade Names: Fluorocarbon-115, Freon® 115, Genetron® 115, Halocarbon 115, 

Monochloropentafluoroethane 

Exposure Limits: 

NIOSH REL: TWA 1000 ppm (6320 mg/m3

) 

OSHA PEL†: none 

Physical Description: Colorless gas with a slight, ethereal odor. 

[Note: Shipped as a liquefied compressed gas.] 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical Properties: 

MW: 154.5 

BP: -38°F 

Sol(77°F): 0.006% 

Fl.P: NA 

IP: 12.96 eV 

RGasD: 5.55 

VP(70°F): 7.9 atm 

FRZ: -223°F 

UEL: NA 

LEL: NA 

Nonflammable Gas 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Frostbite 

Eyes: Frostbite 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Provide: Frostbite wash 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Alkalis, alkaline earth metals (e.g., aluminum powder, sodium, potassium, 

zinc) 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con (liquid) 

SY: Dysp; dizz, inco, narco; nau, vomit; heart palp, card arrhy, 

asphy; liquid: frostbite, derm 

TO: Skin, CNS, CVS 

First Aid (see Table 6): 

Eye: Frostbite 

Skin: Frostbite 

Breath: Resp support 

C 

Chloropicrin Formula: 

CCl3NO2

CAS#: 

76-06-2 

RTECS#: 

PB6300000 

IDLH: 

2 ppm 

Conversion: 1 ppm = 6.72 mg/m3 DOT: 1580 154; 1583 154 (mixture, n.o.s.) 

Synonyms/Trade Names: Nitrochloroform, Nitrotrichloromethane, Trichloronitromethane 

Exposure Limits: 

NIOSH REL: TWA 0.1 ppm (0.7 mg/m3

) 

OSHA PEL: TWA 0.1 ppm (0.7 mg/m3

) 

Physical Description: Colorless to faint-yellow, oily liquid with an intensely irritating 

odor. [pesticide] 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical 

Properties: 

MW: 164.4 

BP: 234°F 

Sol: 0.2% 

Fl.P: NA 

IP: ? 

Sp.Gr: 1.66 

VP: 18 mmHg 

FRZ: -93°F 

UEL: NA 

LEL: NA 

Noncombustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

2 ppm: Sa:Cf£/PaprOv£/CcrFOv/ 

 GmFOv/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers 

[Note: The material may explode when heated under confinement.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, resp sys; lac; cough, pulm edema; nau, vomit 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

67
C 

β-Chloroprene Formula: 

CH2=CClCH=CH2

CAS#: 

126-99-8 

RTECS#: 

EI9625000 

IDLH: 

Ca [300 ppm] 

Conversion: 1 ppm = 3.62 mg/m3 DOT: 1991 131P (inhibited) 

Synonyms/Trade Names: 2-Chloro-1,3-butadiene; Chlorobutadiene; Chloroprene 

Exposure Limits: 

NIOSH REL: Ca 

 C 1 ppm (3.6 mg/m3

) [15-minute] 

 See Appendix A 

OSHA PEL†: TWA 25 ppm (90 mg/m3) [skin] 

Physical Description: Colorless liquid with a pungent, ether-like odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1002 

OSHA 112 

Chemical & Physical 

Properties: 

MW: 88.5 

BP: 139°F 

Sol: Slight 

Fl.P: -4°F 

IP: 8.79 eV 

Sp.Gr: 0.96 

VP: 188 mmHg 

FRZ: -153°F 

UEL: 11.3% 

LEL: 1.9% 

Class IB Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Peroxides & other oxidizers 

[Note: Polymerizes at room temperature unless inhibited with antioxidants.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, resp sys; anxi, irrity; derm; alopecia; repro 

effects; [carc] 

TO: Eyes, skin, resp sys, repro sys [lung & skin cancer] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

o-Chlorostyrene Formula: 

ClC6H4CH=CH2

CAS#: 

2039-87-4 

RTECS#: 

WL4160000 

IDLH: 

N.D. 

Conversion: 1 ppm = 5.67 mg/m3 DOT: 

Synonyms/Trade Names: 2-Chlorostyrene, ortho-Chlorostyrene, 1-Chloro-2-ethenylbenzene 

Exposure Limits: 

NIOSH REL: TWA 50 ppm (285 mg/m3

) 

 ST 75 ppm (428 mg/m3

) 

OSHA PEL†: none 

Physical Description: Colorless liquid. 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical Properties: 

MW: 138.6 

BP: 372°F 

Sol: Insoluble 

Fl.P: 138°F 

IP: ? 

Sp.Gr: 1.10 

VP(77°F): 0.96 mmHg 

FRZ: -82°F 

UEL: ? 

LEL: ? 

Class II Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: None reported 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: In animals: irrit eyes, skin; hema, prot, acidosis; enlarged liver, jaun 

TO: Eyes, skin, liver, kidneys, CNS, PNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash 

Breath: Resp support 

Swallow: Medical attention immed 

68
o-Chlorotoluene Formula: 

ClC6H4CH3

CAS#: 

95-49-8 

RTECS#: 

XS9000000 

IDLH: 

N.D. 

Conversion: 1 ppm = 5.18 mg/m3 DOT: 2238 129 

Synonyms/Trade Names: 1-Chloro-2-methylbenzene, 2-Chloro-1-methylbenzene, 2-Chlorotoluene, 

o-Tolyl chloride 

Exposure Limits: 

NIOSH REL: TWA 50 ppm (250 mg/m3

) 

 ST 75 ppm (375 mg/m3

) 

OSHA PEL†: none 

Physical Description: Colorless liquid with an aromatic odor. 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical Properties: 

MW: 126.6 

BP: 320°F 

Sol(77°F): 0.009% 

Fl.P: 96°F 

IP: 8.83 eV 

Sp.Gr: 1.08 

VP(77°F): 4 mmHg 

FRZ: -31°F 

UEL: ? 

LEL: ? 

Class IC Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Provide: Eyewash 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Acids, alkalis, oxidizers, reducing materials, water 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, muc memb; derm; drow, inco, anes; cough; 

liver, kidney inj 

TO: Eyes, skin, resp sys, CNS, liver, kidneys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

C 

2-Chloro-6-trichloromethyl pyridine Formula: 

ClC5H3NCCl3

CAS#: 

1929-82-4 

RTECS#: 

US7525000 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: 2-Chloro-6-(trichloro-methyl)pyridine; Nitrapyrin; N-serve®; 

2,2,2,6-Tetrachloro-2-picoline 

Exposure Limits: 

NIOSH REL: TWA 10 mg/m3

 (total) 

 ST 20 mg/m3

 (total) 

 TWA 5 mg/m3

 (resp) 

OSHA PEL: TWA 15 mg/m3

 (total) 

 TWA 5 mg/m3

 (resp) 

Physical Description: Colorless or white, crystalline solid with a mild, sweet odor. 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical Properties: 

MW: 230.9 

BP: ? 

Sol: Insoluble 

Fl.P: ? 

IP: ? 

Sp.Gr: ? 

VP(73°F): 0.003 mmHg 

MLT: 145°F 

UEL: ? 

LEL: ? 

Combustible Solid [Explosive] 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Aluminum, magnesium 

[Note: Emits oxides of nitrogen and chloride ion when heated to decomposition.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: No adverse effects noted in ingestion studies with animals. 

TO: Eyes, skin 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

69
Chlorpyrifos Formula: 

C9H11Cl3NO3PS 

CAS#: 

2921-88-2 

RTECS#: 

TF6300000 

IDLH: 

N.D. 

Conversion: DOT: 2783 152 

Synonyms/Trade Names: Chlorpyrifos-ethyl; O,O-Diethyl O-3,5,6-trichloro-2-pyridyl phosphorothioate; Dursban® 

Exposure Limits: 

NIOSH REL: TWA 0.2 mg/m3 OSHA PEL†: none 

 ST 0.6 mg/m3 [skin] 

Measurement Methods 

(see Table 1): 

NIOSH 5600 OSHA 62 

Physical Description: Colorless to white, crystalline solid with a mild, mercaptan-like odor. [pesticide] 

[Note: Commercial formulations may be combined with combustible liquids.] 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Chemical & Physical Properties: 

MW: 350.6 

BP: 320°F (Decomposes) 

Sol: 0.0002% 

Fl.P: ? 

IP: ? 

Sp.Gr: 1.40 (Liquid at 110°F) 

VP: 0.00002 mmHg 

MLT: 108°F 

UEL: ? 

LEL: ? 

Combustible Solid 

Incompatibilities and Reactivities: Strong acids, caustics, amines 

[Note: Corrosive to copper & brass.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Wheez, lar spasms, salv; bluish lips, skin; miosis, blurred 

vision; nau, vomit, abdom cramps, diarr 

TO: Resp sys, CNS, PNS, plasma chol 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

C 

Chromic acid and chromates Formula: 

CrO3 (acid)

CAS#: 

1333-82-0 (CrO3) 

RTECS#: 

GB6650000 (CrO3) 

IDLH: Ca [15 mg/m3

 {as Cr(VI)}]

Conversion: DOT: 1755 154 (acid solution); 1463 141 (acid, solid) 

Synonyms/Trade Names: Chromic acid (CrO3): Chromic anhydride, Chromic oxide, Chromium(VI) oxide (1:3), 

Chromium trioxide. Synonyms of chromates (i.e., chromium(VI) compounds) such as zinc chromate vary 

depending upon the specific compound. 

Exposure Limits: 

NIOSH REL (as Cr): Ca 

 TWA 0.001 mg/m3

 

 See Appendix A 

 See Appendix C 

OSHA PEL (as CrO3): TWA 0.005 mg/m3

 See Appendix C 

Physical Description: CrO3: Dark-red, odorless flakes or powder. 

[Note: Often used in an aqueous solution (H2CrO4).] 

Measurement Methods 

(see Table 1): 

NIOSH 7600, 7604, 7605 

OSHA ID103, ID215, W4001 

Personal Protection/Sanitation

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Chemical & Physical Properties: 

MW: 100.0 

BP: 482°F (Decomposes) 

Sol: 63% 

Fl.P: NA 

IP: NA 

Sp.Gr: 2.70 (CrO3) 

VP: Very low 

MLT: 387°F (Decomposes) 

UEL: NA 

LEL: NA 

CrO3: Noncombustible Solid, but will 

accelerate the burning of combustible 

materials. 

Incompatibilities and Reactivities: Combustible, organic, or other 

readily oxidizable materials (paper, wood, sulfur, aluminum, plastics, etc.); 

corrosive to metals 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit resp sys; nasal septum perf; liver, kidney damage; leucyt, 

leupen, eosin; eye inj, conj; skin ulcer, sens derm; [carc] 

TO: Blood, resp sys, liver, kidneys, eyes, skin [lung cancer] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

70
Chromium(II) compounds (as Cr) Formula: CAS#: RTECS#: IDLH: 

250 mg/m3

 [as Cr(II)] 

Conversion: DOT: 

Synonyms/Trade Names: Synonyms vary depending upon the specific Chromium(II) compound. 

[Note: Chromium(II) compounds include soluble chromous salts.] 

Exposure Limits: 

NIOSH REL: TWA 0.5 mg/m3

 

 See Appendix C 

OSHA PEL: TWA 0.5 mg/m3

 

 See Appendix C 

Measurement Methods 

(see Table 1): 

NIOSH 7024, 7300, 7301, 7303, 9102 

OSHA ID121, ID125G 

Physical Description: Appearance and odor vary depending upon the specific compound. 

Chemical & Physical 

Properties: 

Properties vary depending 

upon the specific 

compound. 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

2.5 mg/m3

: Qm* 

5 mg/m3

: 95XQ*/Sa* 

12.5 mg/m3

: Sa:Cf*/PaprHie* 

25 mg/m3

: 100F/PaprTHie*/ScbaF/SaF 

250 mg/m3

: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Incompatibilities and Reactivities: Varies 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes; sens derm 

TO: Eyes, skin 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush prompt 

Breath: Resp support 

Swallow: Medical attention immed 

C 

Chromium(III) compounds (as Cr) Formula: CAS#: RTECS#: IDLH: 

25 mg/m3 [as Cr(III)] 

Conversion: DOT: 

Synonyms/Trade Names: Synonyms vary depending upon the specific Chromium(III) compound. 

[Note: Chromium(III) compounds include soluble chromic salts.] 

Exposure Limits: 

NIOSH REL: TWA 0.5 mg/m3

 

 See Appendix C 

OSHA PEL: TWA 0.5 mg/m3

 

 See Appendix C 

Measurement Methods 

(see Table 1): 

NIOSH 7024, 7300, 7301, 7303, 9102 

OSHA ID121, ID125G 

Physical Description: Appearance and odor vary depending upon the specific compound. 

Chemical & Physical 

Properties: 

Properties vary depending 

upon the specific compound. 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

2.5 mg/m3

: Qm* 

5 mg/m3

: 95XQ*/Sa* 

12.5 mg/m3: Sa:Cf*/PaprHie* 

25 mg/m3

: 100F/PaprTHie*/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Incompatibilities and Reactivities: Varies 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes; sens derm 

TO: Eyes, skin 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush prompt 

Breath: Resp support 

Swallow: Medical attention immed 

71
C 

Chromium metal Formula: 

Cr 

CAS#: 

7440-47-3 

RTECS#: 

GB4200000 

IDLH: 

250 mg/m3

 (as Cr) 

Conversion: DOT: 

Synonyms/Trade Names: Chrome, Chromium 

Exposure Limits: 

NIOSH REL: TWA 0.5 mg/m3 

 See Appendix C 

OSHA PEL*: TWA 1 mg/m3

 

 See Appendix C 

 [*Note: The PEL also applies to insoluble chromium salts.] 

Physical Description: Blue-white to steel-gray, lustrous, brittle, hard, odorless solid. 

Measurement Methods 

(see Table 1): 

NIOSH 7024, 7300, 7301, 

 7303, 9102 

OSHA ID121, ID125G 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

2.5 mg/m3

: Qm* 

5 mg/m3

: 95XQ*/Sa* 

12.5 mg/m3

: Sa:Cf*/PaprHie* 

25 mg/m3

: 100F/PaprTHie*/ 

 ScbaF/SaF 

250 mg/m3

: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Chemical & Physical Properties: 

MW: 52.0 

BP: 4788°F 

Sol: Insoluble 

Fl.P: NA 

IP: NA 

Sp.Gr: 7.14 

VP: 0 mmHg (approx) 

MLT: 3452°F 

UEL: NA 

LEL: NA 

Noncombustible Solid in bulk form, 

but finely divided dust burns 

rapidly if heated in a flame. 

Incompatibilities and Reactivities: Strong oxidizers (such as hydrogen 

peroxide), alkalis 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin; lung fib (histologic) 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash 

Breath: Resp support 

Swallow: Medical attention immed 

Chromyl chloride Formula: 

Cr(OCl)2

CAS#: 

14977-61-8 

RTECS#: 

GB5775000 

IDLH: 

Ca [N.D.] 

Conversion: DOT: 1758 137 

Synonyms/Trade Names: Chlorochromic anhydride, Chromic oxychloride, Chromium chloride oxide, 

Chromium dichloride dioxide, Chromium dioxide dichloride, Chromium dioxychloride, Chromium oxychloride, 

Dichlorodioxochromium 

Exposure Limits: 

NIOSH REL: Ca OSHA PEL: none 

 0.001 mg Cr(VI)/m3

 See Appendix A, See Appendix C 

Measurement Methods 

(see Table 1): 

None available 

Physical Description: Deep-red liquid with a musty, burning, acrid odor. [Note: Fumes in moist air.] 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Chemical & Physical Properties: 

MW: 154.9 

BP: 243°F 

Sol: Reacts 

Fl.P: NA 

IP: 12.60 eV 

Sp.Gr(77°F): 1.91 

VP: 20 mmHg 

FRZ: -142°F 

UEL: NA 

LEL: NA 

Noncombustible Liquid, but a 

powerful oxidizer. 

Incompatibilities and Reactivities: Water, combustible substances, halides, 

phosphorus, turpentine [Note: Reacts violently in water; forms chromic acid, 

chromic chloride, hydrochloric acid & chlorine. Corrodes common metals.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, upper resp sys; eye, skin burns [carc] 

TO: Eyes, skin, resp sys [lung cancer] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

72
Clopidol Formula: 

C7H7Cl2NO 

CAS#: 

2971-90-6 

RTECS#: 

UU7711500 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: Coyden®; 3,5-Dichloro-2,6-dimethyl-4-pyridinol 

Exposure Limits: 

NIOSH REL: TWA 10 mg/m3 (total) 

 ST 20 mg/m3 (total) 

 TWA 5 mg/m3 (resp) 

OSHA PEL: TWA 15 mg/m3

 (total) 

 TWA 5 mg/m3

 (resp) 

Physical Description: White to light-brown, crystalline solid. 

Measurement Methods 

(see Table 1): 

NIOSH 0500, 0600 

Chemical & Physical Properties: 

MW: 192.1 

BP: ? 

Sol: Insoluble 

Fl.P: NA 

IP: ? 

Sp.Gr: ? 

VP: ? 

MLT: >608°F 

UEL: NA 

LEL: NA 

Noncombustible Solid, but dust may 

explode in cloud form. 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: None reported 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con 

SY: Irrit eyes, skin, nose, throat; cough 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash 

Breath: Fresh air 

C 

Coal dust Formula: CAS#: RTECS#: 

GF8281000 

IDLH: 

N.D. 

Conversion: DOT: 1361 133 

Synonyms/Trade Names: Anthracite coal dust, Bituminous coal dust, Lignite coal dust 

Exposure Limits: 

NIOSH REL: TWA 1 mg/m3

 [measured according to MSHA method (CPSU)] 

 TWA 0.9 mg/m3

 [measured according to ISO/CEN/ACGIH criteria] 

 See Appendix C (Coal Dust and Coal Mine Dust) 

OSHA PEL†: TWA 2.4 mg/m3 [respirable, < 5% SiO2] 

 TWA (10 mg/m3

)/(%SiO2 + 2) [respirable, > 5% SiO2] 

 See Appendix C (Mineral Dusts) 

[Note: The Mine Safety and Health Administration (MSHA) PEL for respirable coal 

mine dust with < 5% silica is 2.0 mg/m3

, or (10 mg/m3) / (% respirable quartz + 2) for 

coal dust with > 5% silica.] 

Physical Description: Dark-brown to black solid dispersed in air. 

Measurement Methods 

(see Table 1): 

NIOSH 0600, 7500 

Chemical & Physical Properties: 

Properties vary depending upon the 

specific coal type. 

Combustible Solid; slightly explosive 

when exposed to flame. 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: None reported 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh 

SY: Chronic bron, decr pulm func, emphy 

TO: Resp sys 

First Aid (see Table 6): 

Breath: Fresh air 

73
Coal tar pitch volatiles Formula: CAS#: 

65996-93-2 

RTECS#: 

GF8655000 

IDLH: 

Ca [80 mg/m3

]

Conversion: DOT: 2713 153 (acridine)

Synonyms/Trade Names: Synonyms vary depending upon the specific compound (e.g., pyrene, phenanthrene, 

acridine, chrysene, anthracene & benzo(a)pyrene). 

[Note: NIOSH considers coal tar, coal tar pitch, and creosote to be coal tar products.] 

Exposure Limits: 

NIOSH REL: Ca 

 TWA 0.1 mg/m3

 (cyclohexane-extractable fraction) 

 See Appendix A 

 See Appendix C 

OSHA PEL: TWA 0.2 mg/m3

 (benzene-soluble fraction) [1910.1002] 

 See Appendix C 

Physical Description: Black or dark-brown amorphous residue. 

Measurement Methods 

(see Table 1): 

OSHA 58 

Chemical & Physical 

Properties: 

Properties vary depending upon 

the specific compound. 

Combustible Solids 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: Daily 

Remove: N.R. 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con 

SY: Derm, bron, [carc] 

TO: Resp sys, skin, bladder, kidneys [lung, kidney & skin cancer] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

C 

Cobalt carbonyl (as Co) Formula: 

C8Co2O8

CAS#: 

10210-68-1 

RTECS#: 

GG0300000 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: di-mu-Carbonylhexacarbonyldicobalt, Cobalt octacarbonyl, Cobalt tetracarbonyl dimer, 

Dicobalt carbonyl, Dicobalt Octacarbonyl, Octacarbonyldicobalt 

Exposure Limits: 

NIOSH REL: TWA 0.1 mg/m3

OSHA PEL†: none 

Physical Description: Orange to dark-brown, crystalline solid. 

[Note: The pure substance is white.] 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical Properties: 

MW: 341.9 

BP: 126°F (Decomposes) 

Sol: Insoluble 

Fl.P: NA 

IP: ? 

Sp.Gr: 1.87 

VP: 0.7 mmHg 

MLT: 124°F 

UEL: NA 

LEL: NA 

Noncombustible Solid, but flammable 

carbon monoxide is emitted during 

decomposition. 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Air 

[Note: Decomposes on exposure to air or heat; stable in atmosphere of hydrogen & carbon monoxide.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, muc memb; cough, decr pulm func, wheez, 

dysp; in animals: liver, kidney inj, pulm edema 

TO: Eyes, skin, resp sys, blood, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash 

Breath: Resp support 

Swallow: Medical attention immed 

74
Cobalt hydrocarbonyl (as Co) Formula: 

HCo(CO)4

CAS#: 

16842-03-8 

RTECS#: 

GG0900000 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: Hydrocobalt tetracarbonyl, Tetracarbonylhydridocobalt, Tetracarbonylhydrocobalt 

Exposure Limits: 

NIOSH REL: TWA 0.1 mg/m3

OSHA PEL†: none 

Physical Description: Gas with an offensive odor. 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical Properties: 

MW: 172.0 

BP: ? 

Sol: 0.05% 

Fl.P: NA (Gas) 

IP: ? 

RGasD: 5.93 

VP: >1 atm 

FRZ: -15°F 

UEL: ? 

LEL: ? 

Flammable Gas 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Air 

[Note: Unstable gas that decomposes rapidly in air at room temperature to cobalt carbonyl & hydrogen.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con 

SY: In animals: irrit resp sys; dysp, cough, decr pulm func, pulm edema 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash 

Breath: Resp support 

C 

Cobalt metal dust and fume (as Co) Formula: 

Co 

CAS#: 

7440-48-4 

RTECS#: 

GF8750000 

IDLH: 

20 mg/m3

 (as Co) 

Conversion: DOT: 

Synonyms/Trade Names: Cobalt metal dust, Cobalt metal fume 

Exposure Limits: 

NIOSH REL: TWA 0.05 mg/m3

OSHA PEL†: TWA 0.1 mg/m3

Physical Description: Odorless, silver-gray to black solid. 

Measurement Methods 

(see Table 1): 

NIOSH 7027, 7300, 7301, 7303, 9102 

OSHA ID121, ID125G, ID213 

Chemical & Physical 

Properties: 

MW: 58.9 

BP: 5612°F 

Sol: Insoluble 

Fl.P: NA 

IP: NA 

Sp.Gr: 8.92 

VP: 0 mmHg (approx) 

MLT: 2719°F 

UEL: NA 

LEL: NA 

Noncombustible Solid in bulk 

form, but finely divided dust 

will burn at high temperatures. 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: N.R. 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

0.25 mg/m3

: Qm 

0.5 mg/m3

: 95XQ*/Sa* 

1.25 mg/m3

: Sa:Cf*/PaprHie* 

2.5 mg/m3

: 100F/ScbaF/SaF 

20 mg/m3: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, ammonium nitrate 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Cough, dysp, wheez, decr pulm func; low-wgt; derm; diffuse 

nodular fib; resp hypersensitivity, asthma 

TO: Skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash 

Breath: Resp support 

Swallow: Medical attention immed 

75
C 

Coke oven emissions Formula: CAS#: RTECS#: 

GH0346000 

IDLH: 

Ca [N.D.] 

Conversion: DOT: 

Synonyms/Trade Names: Synonyms vary depending upon the specific constituent. 

Exposure Limits: 

NIOSH REL: Ca 

 TWA 0.2 mg/m3

 (benzene-soluble fraction) 

 See Appendix A 

 See Appendix C 

OSHA PEL: [1910.1029] TWA 0.150 mg/m3

 (benzene-soluble fraction) 

Physical Description: Emissions released during the carbonization of bituminous coal 

for the production of coke. [Note: See Appendix C for more information.] 

Measurement Methods 

(see Table 1): 

OSHA 58 

Chemical & Physical 

Properties: 

Properties vary depending upon 

the constituent. 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: Daily 

Remove: N.R. 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

See Appendix E (page 351) 

Incompatibilities and Reactivities: None reported 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con 

SY: Irrit eyes, resp sys; cough, dysp, wheez; [carc] 

TO: Skin, resp sys, urinary sys [skin, lung, kidney & bladder cancer] 

First Aid (see Table 6): 

Eye: Irr immed 

Breath: Resp support 

Copper (dusts and mists, as Cu) Formula: 

Cu 

CAS#: 

7440-50-8 

RTECS#: 

GL5325000 

IDLH: 

100 mg/m3 (as Cu) 

Conversion: DOT: 

Synonyms/Trade Names: Copper metal dusts, Copper metal fumes 

Exposure Limits: 

NIOSH REL*: TWA 1 mg/m3

 

OSHA PEL*: TWA 1 mg/m3 

[*Note: The REL and PEL also apply to other copper compounds (as Cu) except 

copper fume.] 

Physical Description: Reddish, lustrous, malleable, odorless solid. 

Measurement Methods 

(see Table 1): 

NIOSH 7029, 7300, 7301, 

 7303, 9102 

OSHA ID121, ID125G 

Chemical & Physical 

Properties: 

MW: 63.5 

BP: 4703°F 

Sol: Insoluble 

Fl.P: NA 

IP: NA 

Sp.Gr: 8.94 

VP: 0 mmHg (approx) 

MLT: 1981°F 

UEL: NA 

LEL: NA 

Noncombustible Solid in bulk 

form, but powdered form may 

ignite. 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

5 mg/m3

: Qm* 

10 mg/m3

: 95XQ*/Sa* 

25 mg/m3

: Sa:Cf*/PaprHie* 

50 mg/m3: 100F/PaprTHie*/ScbaF/SaF 

100 mg/m3

: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Incompatibilities and Reactivities: Oxidizers, alkalis, sodium azide, acetylene 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, nose, pharynx; nasal septum perf; metallic taste; derm; 

in animals: lung, liver, kidney damage; anemia 

TO: Eyes, skin, resp sys, liver, kidneys (incr risk with Wilson's disease) 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 

76
Copper fume (as Cu) Formula: 

CuO/Cu 

CAS#: 

1317-38-0 (CuO) 

RTECS#: 

GL7900000 (CuO) 

IDLH: 

100 mg/m3

 (as Cu) 

Conversion: DOT: 

Synonyms/Trade Names: Cu: Copper fume CuO: Black copper oxide fume, Copper monoxide fume, 

Copper(II) oxide fume, Cupric oxide fume 

[Note: Also see specific listing for Copper (dusts and mists).] 

Exposure Limits: 

NIOSH REL: TWA 0.1 mg/m3

OSHA PEL: TWA 0.1 mg/m3

Physical Description: Finely divided black particulate dispersed in air. 

[Note: Exposure may occur in copper & brass plants and during the welding of 

copper alloys.] 

Measurement Methods 

(see Table 1): 

NIOSH 7029, 7300, 7301, 7303 

OSHA ID121, ID125G, ID206 

Chemical & Physical Properties: 

MW: 79.5 

BP: Decomposes 

Sol: Insoluble 

Fl.P: NA 

IP: NA 

Sp.Gr: 6.4 (CuO) 

VP: 0 mmHg (approx) 

MLT: 1879°F (Decomposes) 

UEL: NA 

LEL: NA 

CuO: Noncombustible Solid 

Personal Protection/Sanitation

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

1 mg/m3

: 95XQ/Sa 

2.5 mg/m3

: Sa:Cf/PaprHie 

5 mg/m3

: 100F/SaT:Cf/PaprTHie/ 

 ScbaF/SaF 

100 mg/m3

: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Incompatibilities and Reactivities: CuO: Acetylene, zirconium 

[Note: See Copper (dusts and mists) for properties of Copper metal.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con 

SY: Irrit eyes, upper resp sys; metal fume fever: chills, musc ache, nau, fever, 

dry throat, cough, lass; metallic or sweet taste; discoloration skin, hair 

TO: Eyes, skin, resp sys (incr risk with Wilson's disease) 

First Aid (see Table 6): 

Breath: Resp support 

C 

Cotton dust (raw) Formula: CAS#: RTECS#: 

GN2275000 

IDLH: 

100 mg/m3

Conversion: DOT: 1365 133 (cotton)

Synonyms/Trade Names: Raw cotton dust 

Exposure Limits: 

NIOSH REL: TWA <0.200 mg/m3

 

 See Appendix C 

OSHA PEL: [Z-1-A & 1910.1043] 

 See Appendix C 

Physical Description: Colorless, odorless solid. 

Measurement Methods 

(see Table 1): 

OSHA [1910.1043] 

Chemical & Physical Properties: 

MW: ? 

BP: Decomposes 

Sol: Insoluble 

Fl.P: NA 

IP: NA 

Sp.Gr: ? 

VP: 0 mmHg (approx) 

MLT: Decomposes 

UEL: NA 

LEL: NA 

Combustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

1 mg/m3

: Qm 

2 mg/m3: 95XQ/Sa 

5 mg/m3: Sa:Cf/PaprHie 

10 mg/m3

: 100F/SaT:Cf/PaprTHie/ 

 ScbaF/SaF 

100 mg/m3

: Sa:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

See Appendix E (page 351) 

Incompatibilities and Reactivities: Strong oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh 

SY: Byssinosis: chest tight, cough, wheez, dysp; decr FEV; bron; 

mal; fever, chills, upper resp symptoms after initial exposure 

TO: CVS, resp sys 

First Aid (see Table 6): 

Breath: Fresh air 

77
Crag® herbicide Formula: 

C6H3Cl2OCH2CH2OSO3Na 

CAS#: 

136-78-7 

RTECS#: 

KK4900000 

IDLH: 

500 mg/m3

Conversion: DOT: 

Synonyms/Trade Names: Crag® herbicide No. 1; 2-(2,4-Dichlorophenoxy)ethyl sodium sulfate; Sesone 

Exposure Limits: 

NIOSH REL: TWA 10 mg/m3 (total) 

 TWA 5 mg/m3 (resp) 

OSHA PEL†: TWA 15 mg/m3

 (total) 

 TWA 5 mg/m3 (resp) 

Physical Description: Colorless to white crystalline, odorless solid. [herbicide] 

Measurement Methods 

(see Table 1): 

NIOSH S356 (II-5) 

Chemical & Physical 

Properties: 

MW: 309.1 

BP: Decomposes 

Sol(77°F): 26% 

Fl.P: NA 

IP: ? 

Sp.Gr: 1.70 

VP: 0.1 mmHg 

MLT: 473°F (Decomposes) 

UEL: NA 

LEL: NA 

Noncombustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

50 mg/m3

: Qm 

100 mg/m3

: 95XQ/Sa 

250 mg/m3

: Sa:Cf/PaprHie 

500 mg/m3

: 100F/PaprTHie*/SaT:Cf*/ 

 ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, acids 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin; liver, kidney damage; in animals: CNS 

effects, convuls 

TO: Eyes, skin, CNS, liver, kidneys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 

C 

m-Cresol Formula: 

CH3C6H4OH 

CAS#: 

108-39-4 

RTECS#: 

GO6125000 

IDLH: 

250 ppm 

Conversion: 1 ppm = 4.43 mg/m3 DOT: 2076 153 

Synonyms/Trade Names: meta-Cresol, 3-Cresol, m-Cresylic acid, 1-Hydroxy-3-methylbenzene, 

3-Hydroxytoluene, 3-Methyl phenol 

Exposure Limits: 

NIOSH REL: TWA 2.3 ppm (10 mg/m3

) 

OSHA PEL: TWA 5 ppm (22 mg/m3

) [skin] 

Physical Description: Colorless to yellowish liquid with a sweet, tarry odor. 

[Note: A solid below 54°F.] 

Measurement Methods 

(see Table 1): 

NIOSH 2546 

OSHA 32 

Chemical & Physical Properties: 

MW: 108.2 

BP: 397°F 

Sol: 2% 

Fl.P: 187°F 

IP: 8.98 eV 

Sp.Gr: 1.03 

VP(77°F): 0.14 mmHg 

FRZ: 54°F 

UEL: ? 

LEL(300°F): 1.1% 

Class IIIA Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

23 ppm: CcrOv95/Sa 

57.5 ppm: Sa:Cf/PaprOvHie 

115 ppm: CcrFOv100/GmFOv100/ 

 PaprTOvHie*/SaT:Cf*/ 

 ScbaF/SaF 

250 ppm: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, acids 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, muc memb; CNS effects: conf, depres, resp 

fail; dysp, irreg rapid resp, weak pulse; eye, skin burns; derm; 

lung, liver, kidney, pancreas damage 

TO: Eyes, skin, resp sys, CNS, liver, kidneys, pancreas, CVS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

78
o-Cresol Formula: 

CH3C6H4OH 

CAS#: 

95-48-7 

RTECS#: 

GO6300000 

IDLH: 

250 ppm 

Conversion: 1 ppm = 4.43 mg/m3 DOT: 2076 153 

Synonyms/Trade Names: ortho-Cresol, 2-Cresol, o-Cresylic acid, 1-Hydroxy-2-methylbenzene, 2-Hydroxytoluene, 

2-Methyl phenol 

Exposure Limits: 

NIOSH REL: TWA 2.3 ppm (10 mg/m3

) 

OSHA PEL: TWA 5 ppm (22 mg/m3) [skin] 

Physical Description: White crystals with a sweet, tarry odor. 

[Note: A liquid above 88°F.] 

Measurement Methods 

(see Table 1): 

NIOSH 2546 

OSHA 32 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

23 ppm: CcrOv95/Sa 

57.5 ppm: Sa:Cf/PaprOvHie 

115 ppm: CcrFOv100/GmFOv100/ 

 PaprTOvHie*/SaT:Cf*/ 

 ScbaF/SaF 

250 ppm: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Chemical & Physical Properties: 

MW: 108.2 

BP: 376°F 

Sol: 2% 

Fl.P: 178°F 

IP: 8.93 eV 

Sp.Gr: 1.05 

VP(77°F): 0.29 mmHg 

MLT: 88°F 

UEL: ? 

LEL(300°F): 1.4% 

Combustible Solid 

Class IIIA Combustible Liquid Incompatibilities and Reactivities: Strong oxidizers, acids 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, muc memb; CNS effects: conf, depres, resp fail; 

dysp, irreg rapid resp, weak pulse; eye, skin burns; derm; lung, liver, 

kidney, pancreas damage 

TO: Eyes, skin, resp sys, CNS, liver, kidneys, pancreas, CVS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

C 

p-Cresol Formula: 

CH3C6H4OH 

CAS#: 

106-44-5 

RTECS#: 

GO6475000 

IDLH: 

250 ppm 

Conversion: 1 ppm = 4.43 mg/m3 DOT: 2076 153 

Synonyms/Trade Names: para-Cresol, 4-Cresol, p-Cresylic acid, 1-Hydroxy-4-methylbenzene, 4-Hydroxytoluene, 

4-Methyl phenol 

Exposure Limits: 

NIOSH REL: TWA 2.3 ppm (10 mg/m3

) 

OSHA PEL: TWA 5 ppm (22 mg/m3

) [skin] 

Physical Description: Crystalline solid with a sweet, tarry odor. 

[Note: A liquid above 95°F.] 

Measurement Methods 

(see Table 1): 

NIOSH 2546 

OSHA 32 

Chemical & Physical Properties: 

MW: 108.2 

BP: 396°F 

Sol: 2% 

Fl.P: 187°F 

IP: 8.97 eV 

Sp.Gr: 1.04 

VP(77°F): 0.11 mmHg 

MLT: 95°F 

UEL: ? 

LEL(300°F): 1.1% 

Combustible Solid 

Class IIIA Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

23 ppm: CcrOv95/Sa 

57.5 ppm: Sa:Cf/PaprOvHie 

115 ppm: CcrFOv100/GmFOv100/ 

 PaprTOvHie*/SaT:Cf*/ 

 ScbaF/SaF 

250 ppm: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, acids 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, muc memb; CNS effects: conf, depres, resp fail; 

dysp, irreg rapid resp, weak pulse; eye, skin burns; derm; lung, liver, 

kidney, pancreas damage 

TO: Eyes, skin, resp sys, CNS, liver, kidneys, pancreas, CVS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

79
Crotonaldehyde Formula: 

CH3CH=CHCHO 

CAS#: 

4170-30-3 

RTECS#: 

GP9499000 

IDLH: 

50 ppm 

Conversion: 1 ppm = 2.87 mg/m3 DOT: 1143 131P (inhibited) 

Synonyms/Trade Names: 2-Butenal, β-Methyl acrolein, Propylene aldehyde 

Exposure Limits: 

NIOSH REL: TWA 2 ppm (6 mg/m3

) 

 See Appendix C (Aldehydes) 

OSHA PEL: TWA 2 ppm (6 mg/m3

) 

Physical Description: Water-white liquid with a suffocating odor. 

[Note: Turns pale-yellow on contact with air.] 

Measurement Methods 

(see Table 1): 

NIOSH 3516 

OSHA 81 

Chemical & Physical Properties: 

MW: 70.1 

BP: 219°F 

Sol: 18% 

Fl.P: 45°F 

IP: 9.73 eV 

Sp.Gr: 0.87 

VP: 19 mmHg 

FRZ: -101°F 

UEL: 15.5% 

LEL: 2.1% 

Class IB Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

20 ppm: CcrOv*/Sa* 

50 ppm: Sa:Cf*/PaprOv*/CcrFOv/ 

 GmFOv/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Caustics, ammonia, strong oxidizers, nitric acid, amines 

[Note: Polymerization may occur at elevated temperatures, such as in fire conditions.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, resp sys; in animals: dysp, pulm edema, irrit skin 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

C 

Crufomate Formula: 

C12H19ClNO3P 

CAS#: 

299-86-5 

RTECS#: 

TB3850000 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: 4-t-Butyl-2-chlorophenylmethyl methylphosphoramidate, Dowco® 132, Ruelene® 

Exposure Limits: 

NIOSH REL: TWA 5 mg/m3 

 ST 20 mg/m3

OSHA PEL†: none 

Physical Description: White, crystalline solid in pure form. [pesticide] 

[Note: Commercial product is a yellow oil.] 

Measurement Methods 

(see Table 1): 

NIOSH 0500 

OSHA PV2015 

Chemical & Physical Properties: 

MW: 291.7 

BP: Decomposes 

Sol: Insoluble 

Fl.P: ? 

IP: ? 

Sp.Gr: 1.16 

VP(243°F): 0.01 mmHg 

MLT: 140°F 

UEL: ? 

LEL: ? 

Combustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Strongly alkaline & strongly acidic media 

[Note: Unstable over long periods in aqueous preparations or above 140°F.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, resp sys; wheez, dysp; blurred vision, lac; 

sweat; abdom cramps, diarr, nau, anor 

TO: Eyes, skin, resp sys, blood chol 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

80
Cumene Formula: 

C6H5CH(CH3)2

CAS#: 

98-82-8 

RTECS#: 

GR8575000 

IDLH: 

900 ppm [10%LEL] 

Conversion: 1 ppm = 4.92 mg/m3 DOT: 1918 130 

Synonyms/Trade Names: Cumol, Isopropyl benzene, 2-Phenyl propane 

Exposure Limits: 

NIOSH REL: TWA 50 ppm (245 mg/m3) [skin] 

OSHA PEL: TWA 50 ppm (245 mg/m3

) [skin] 

Physical Description: Colorless liquid with a sharp, penetrating, aromatic odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1501 

Chemical & Physical 

Properties: 

MW: 120.2 

BP: 306°F 

Sol: Insoluble 

Fl.P: 96°F 

IP: 8.75 eV 

Sp.Gr: 0.86 

VP: 8 mmHg 

FRZ: -141°F 

UEL: 6.5% 

LEL: 0.9% 

Class IC Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

500 ppm: CcrOv*/Sa* 

900 ppm: Sa:Cf*/PaprOv*/CcrFOv/ 

 GmFOv/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Oxidizers, nitric acid, sulfur acid 

[Note: Forms cumene hydroperoxide upon long exposure to air.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, muc memb; derm; head, narco, coma 

TO: Eyes, skin, resp sys, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush prompt 

Breath: Resp support 

Swallow: Medical attention immed 

C 

Cyanamide Formula: 

NH2CN 

CAS#: 

420-04-2 

RTECS#: 

GS5950000 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: Amidocyanogen, Carbimide, Carbodiimide, Cyanogen nitride, Hydrogen cyanamide 

[Note: Cyanamide is also a synonym for Calcium cyanamide.] 

Exposure Limits: 

NIOSH REL: TWA 2 mg/m3

OSHA PEL†: none 

Physical Description: Crystalline solid. 

Measurement Methods 

(see Table 1): 

NIOSH 0500 

Chemical & Physical Properties: 

MW: 42.1 

BP: 500°F (Decomposes) 

Sol(59°F): 78% 

Fl.P: 286°F 

IP: 10.65 eV 

Sp.Gr: 1.28 

VP: ? 

MLT: 113°F 

UEL: ? 

LEL: ? 

Combustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Above 104°F: Moisture, acids, or alkalis; 1,2-phenylene diamine salts 

[Note: Polymerization may occur on evaporation of aqueous solutions.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, resp sys; eye, skin burns; miosis, salv, lac, 

twitch; Antabuse-like effects 

TO: Eyes, skin, resp sys, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

81
Cyanogen Formula: 

NCCN 

CAS#: 

460-19-5 

RTECS#: 

GT1925000 

IDLH: 

N.D. 

Conversion: 1 ppm = 2.13 mg/m3 DOT: 1026 119 

Synonyms/Trade Names: Carbon nitride, Dicyan, Dicyanogen, Ethanedinitrile, Oxalonitrile 

Exposure Limits: 

NIOSH REL: TWA 10 ppm (20 mg/m3) 

OSHA PEL†: none 

Physical Description: Colorless gas with a pungent, almond-like odor. 

[Note: Shipped as a liquefied compressed gas. Forms cyanide in the body.] 

Measurement Methods 

(see Table 1): 

OSHA PV2104 

Chemical & Physical Properties: 

MW: 52.0 

BP: -6°F 

Sol: 1% 

Fl.P: NA (Gas) 

IP: 13.57 eV 

RGasD: 1.82 

Sp.Gr: 0.95 (Liquid at -6°F) 

VP(70°F): 5.1 atm 

FRZ: -18°F 

UEL: 32% 

LEL: 6.6% 

Flammable Gas 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Frostbite 

Eyes: Prevent eye contact/Frostbite 

Wash skin: N.R. 

Remove: When wet (flamm) 

Change: N.R. 

Provide: Frostbite wash 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Acids, water, strong oxidizers (e.g., dichlorine oxide, fluorine) 

[Note: Slowly hydrolyzed in water to form hydrogen cyanide, oxalic acid, or ammonia.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con 

SY: Irrit eyes, nose, upper resp sys; lac; cherry red lips, tachypnea, hypernea, 

bradycardia; head, convuls; dizz, loss of appetite, low-wgt; liquid: frostbite 

TO: Eyes, resp sys, CNS, CVS 

First Aid (see Table 6): 

Eye: Frostbite 

Skin: Frostbite 

Breath: Resp support 

C 

Cyanogen chloride Formula: 

ClCN 

CAS#: 

506-77-4 

RTECS#: 

GT2275000 

IDLH: 

N.D. 

Conversion: 1 ppm = 2.52 mg/m3 DOT: 1589 125 (inhibited) 

Synonyms/Trade Names: Chlorcyan, Chlorine cyanide, Chlorocyanide, Chlorocyanogen 

Exposure Limits: 

NIOSH REL: C 0.3 ppm (0.6 mg/m3

) 

OSHA PEL†: none 

Physical Description: Colorless gas or liquid (below 55°F) with an irritating odor. 

[Note: Shipped as a liquefied gas. A solid below 20°F. Forms cyanide in the body.] 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical Properties: 

MW: 61.5 

BP: 55°F 

Sol: 7% 

Fl.P: NA 

IP: 12.49 eV 

RGasD: 2.16 

Sp.Gr: 1.22 (Liquid at 32°F) 

VP: 1010 mmHg 

FRZ: 20°F 

UEL: NA 

LEL: NA 

Nonflammable Gas 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact (liquid) 

Eyes: Prevent eye contact (liquid) 

Wash skin: When contam (liquid) 

Remove: When wet or contam (liquid) 

Change: N.R. 

Provide: Eyewash (liquid) 

 Quick drench (liquid) 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Water, acids, alkalis, ammonia, alcohols 

[Note: Can react very slowly with water to form hydrogen cyanide. May be stabilized to prevent polymerization.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs (liquid), Ing (liquid), Con (liquid) 

SY: Irrit eyes, upper resp sys; cough, delayed pulm edema; lass, 

head, dizz, conf, nau, vomit; irreg heartbeat; irrit skin (liquid) 

TO: Eyes, skin, resp sys, CNS, CVS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water wash immed (liquid) 

Breath: Resp support 

Swallow: Medical attention immed (liquid) 

82
Cyclohexane Formula: 

C6H12

CAS#: 

110-82-7 

RTECS#: 

GU6300000 

IDLH: 

1300 ppm [10%LEL] 

Conversion: 1 ppm = 3.44 mg/m3 DOT: 1145 128 

Synonyms/Trade Names: Benzene hexahydride, Hexahydrobenzene, Hexamethylene, Hexanaphthene 

Exposure Limits: 

NIOSH REL: TWA 300 ppm (1050 mg/m3) 

OSHA PEL: TWA 300 ppm (1050 mg/m3

) 

Physical Description: Colorless liquid with a sweet, chloroform-like odor. 

[Note: A solid below 44°F.] 

Measurement Methods 

(see Table 1): 

NIOSH 1500 

OSHA 7 

Chemical & Physical 

Properties: 

MW: 84.2 

BP: 177°F 

Sol: Insoluble 

Fl.P: 0°F 

IP: 9.88 eV 

Sp.Gr: 0.78 

VP: 78 mmHg 

FRZ: 44°F 

UEL: 8% 

LEL: 1.3% 

Class IB Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

1300 ppm: Sa:Cf£/PaprOv£/CcrFOv/ 

 GmFOv/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, resp sys; drow; derm; narco, coma 

TO: Eyes, skin, resp sys, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush prompt 

Breath: Resp support 

Swallow: Medical attention immed 

C 

Cyclohexanethiol Formula: 

C6H11SH 

CAS#: 

1569-69-3 

RTECS#: 

GV7525000 

IDLH: 

N.D. 

Conversion: 1 ppm = 4.75 mg/m3 DOT: 3054 129 

Synonyms/Trade Names: Cyclohexylmercaptan, Cyclohexylthiol 

Exposure Limits: 

NIOSH REL: C 0.5 ppm (2.4 mg/m3

) [15-minute] 

OSHA PEL: none 

Physical Description: Colorless liquid with a strong, offensive odor. 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical 

Properties: 

MW: 116.2 

BP: 316°F 

Sol: Insoluble 

Fl.P: 110°F 

IP: ? 

Sp.Gr: 0.98 

VP: 10 mmHg 

FRZ: -181°F 

UEL: ? 

LEL: ? 

Class II Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

5 ppm: CcrOv/Sa 

12.5 ppm: Sa:Cf/PaprOv 

25 ppm: CcrFOv/GmFOv/PaprTOv/ 

 ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Oxidizers, reducing agents, strong acids, alkali metals 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, resp sys; head, dizz, lass, nau, vomit, 

convuls; cough, wheez, laryngitis, dysp 

TO: Eyes, skin, resp sys, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

83
C 

Cyclohexanol Formula: 

C6H11OH 

CAS#: 

108-93-0 

RTECS#: 

GV7875000 

IDLH: 

400 ppm 

Conversion: 1 ppm = 4.10 mg/m3 DOT: 1993 128 (combustible liquid, n.o.s.) 

Synonyms/Trade Names: Anol, Cyclohexyl alcohol, Hexahydrophenol, Hexalin, Hydralin, Hydroxycyclohexane 

Exposure Limits: 

NIOSH REL: TWA 50 ppm (200 mg/m3) [skin] 

OSHA PEL†: TWA 50 ppm (200 mg/m3

) 

Physical Description: Sticky solid or colorless to light-yellow liquid (above 77°F) with 

a camphor-like odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1402, 1405 

OSHA 7 

Chemical & Physical 

Properties: 

MW: 100.2 

BP: 322°F 

Sol: 4% 

Fl.P: 154°F 

IP: 10.00 eV 

Sp.Gr: 0.96 

VP: 1 mmHg 

MLT: 77°F 

UEL: ? 

LEL: ? 

Class IIIA Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

400 ppm: CcrOv*/PaprOv*/GmFOv/ 

 Sa*/ScbaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers (such as hydrogen peroxide & nitric acid) 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, nose, throat; narco 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 

Cyclohexanone Formula: 

C6H10O 

CAS#: 

108-94-1 

RTECS#: 

GW1050000 

IDLH: 

700 ppm 

Conversion: 1 ppm = 4.02 mg/m3 DOT: 1915 127 

Synonyms/Trade Names: Anone, Cyclohexyl ketone, Pimelic ketone 

Exposure Limits: 

NIOSH REL: TWA 25 ppm (100 mg/m3

) [skin] 

OSHA PEL†: TWA 50 ppm (200 mg/m3

) 

Physical Description: Water-white to pale-yellow liquid with a peppermint- or 

acetone-like odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1300, 2555 

OSHA 1 

Chemical & Physical 

Properties: 

MW: 98.2 

BP: 312°F 

Sol: 15% 

Fl.P: 146°F 

IP: 9.14 eV 

Sp.Gr: 0.95 

VP: 5 mmHg 

FRZ: -49°F 

UEL: 9.4% 

LEL(212°F): 1.1% 

Class IIIA Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

625 ppm: Sa:Cf£/PaprOv£ 

700 ppm: CcrFOv/GmFOv/PaprTOv£/ 

 ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Oxidizers, nitric acid 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, muc memb; head; narco, coma; derm; in 

animals: liver, kidney damage 

TO: Eyes, skin, resp sys, CNS, liver, kidneys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush prompt 

Breath: Resp support 

Swallow: Medical attention immed 

84
Cyclohexene Formula: 

C6H10

CAS#: 

110-83-8 

RTECS#: 

GW2500000 

IDLH: 

2000 ppm 

Conversion: 1 ppm = 3.36 mg/m3 DOT: 2256 130 

Synonyms/Trade Names: Benzene tetrahydride, Tetrahydrobenzene 

Exposure Limits: 

NIOSH REL: TWA 300 ppm (1015 mg/m3) 

OSHA PEL: TWA 300 ppm (1015 mg/m3

) 

Physical Description: Colorless liquid with a sweet odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1500 

OSHA 7 

Chemical & Physical 

Properties: 

MW: 82.2 

BP: 181°F 

Sol: Insoluble 

Fl.P: 11°F 

IP: 8.95 eV 

Sp.Gr: 0.81 

VP: 67 mmHg 

FRZ: -154°F 

UEL: ? 

LEL: ? 

Class IB Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

2000 ppm: Sa:Cf£/PaprOv£/CcrFOv/ 

 GmFOv/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers [Note: Forms explosive peroxides with oxygen upon 

storage.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, resp sys; drow 

TO: Eyes, skin, resp sys, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 

C 

Cyclohexylamine Formula: 

C6H11NH2

CAS#: 

108-91-8 

RTECS#: 

GX0700000 

IDLH: 

N.D. 

Conversion: 1 ppm = 4.06 mg/m3 DOT: 2357 132 

Synonyms/Trade Names: Aminocyclohexane, Aminohexahydrobenzene, Hexahydroaniline, 

Hexahydrobenzenamine 

Exposure Limits: 

NIOSH REL: TWA 10 ppm (40 mg/m3

) 

OSHA PEL†: none 

Physical Description: Colorless or yellow liquid with a strong, fishy, amine-like odor. 

Measurement Methods 

(see Table 1): 

NIOSH 2010 

OSHA PV2016 

Chemical & Physical Properties: 

MW: 99.2 

BP: 274°F 

Sol: Miscible 

Fl.P: 88°F 

IP: 8.37 eV 

Sp.Gr: 0.87 

VP: 11 mmHg 

FRZ: 0°F 

UEL: 9.4% 

LEL: 1.5% 

Class IC Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Oxidizers, organic compounds, acid anhydrides, acid chlorides, acids, lead 

[Note: Corrosive to copper, aluminum, zinc & galvanized steel.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, muc memb, resp sys; eye, skin burns; skin 

sens; cough, pulm edema; drow, dizz; diarr, nau, vomit 

TO: Eyes, skin, resp sys, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

85
C 

Cyclonite Formula: 

C3H6N6O6

CAS#: 

121-82-4 

RTECS#: 

XY9450000 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: Cyclotrimethylenetrinitramine; Hexahydro-1,3,5-trinitro-s-triazine; RDX; 

Trimethylenetrinitramine; 1,3,5-Trinitro-1,3,5-triazacyclohexane 

Exposure Limits: 

NIOSH REL: TWA 1.5 mg/m3

 

 ST 3 mg/m3

 [skin] 

OSHA PEL†: none 

Physical Description: White, crystalline powder. [Note: A powerful high explosive.] 

Measurement Methods 

(see Table 1): 

NIOSH 0500 

Chemical & Physical Properties: 

MW: 222.2 

BP: ? 

Sol: Insoluble 

Fl.P: Explodes 

IP: ? 

Sp.Gr: 1.82 

VP(230°F): 0.0004 mmHg 

MLT: 401°F 

UEL: ? 

LEL: ? 

Combustible Solid [EXPLOSIVE!] 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam/Daily 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Strong oxidizers, combustible materials, heat 

[Note: Detonates on contact with mercury fulminate.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin; head, irrity, lass, tremor, nau, dizz, vomit, 

insom, convuls 

TO: Eyes, skin, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

Cyclopentadiene Formula: 

C5H6

CAS#: 

542-92-7 

RTECS#: 

GY1000000 

IDLH: 

750 ppm 

Conversion: 1 ppm = 2.70 mg/m3 DOT: 

Synonyms/Trade Names: 1,3-Cyclopentadiene 

Exposure Limits: 

NIOSH REL: TWA 75 ppm (200 mg/m3

) 

OSHA PEL: TWA 75 ppm (200 mg/m3

) 

Physical Description: Colorless liquid with an irritating, terpene-like odor. 

Measurement Methods 

(see Table 1): 

NIOSH 2523 

Chemical & Physical Properties: 

MW: 66.1 

BP: 107°F 

Sol: Insoluble 

Fl.P(oc): 77°F 

IP: 8.56 eV 

Sp.Gr: 0.80 

VP: 400 mmHg 

FRZ: -121°F 

UEL: ? 

LEL: ? 

Class IC Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

750 ppm: CcrOv/GmFOv/PaprOv/ 

 Sa/ScbaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, fuming nitric acid, sulfuric acid 

[Note: Polymerizes to dicyclopentadiene upon standing.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, nose 

TO: Eyes, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 

86
Cyclopentane Formula: 

C5H10

CAS#: 

287-92-3 

RTECS#: 

GY2390000 

IDLH: 

N.D. 

Conversion: 1 ppm = 2.87 mg/m3 DOT: 1146 128 

Synonyms/Trade Names: Pentamethylene 

Exposure Limits: 

NIOSH REL: TWA 600 ppm (1720 mg/m3) 

OSHA PEL†: none 

Physical Description: Colorless liquid with a mild, sweet odor. 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical Properties: 

MW: 70.2 

BP: 121°F 

Sol: Insoluble 

Fl.P: -35°F 

IP: 10.52 eV 

Sp.Gr: 0.75 

VP(88°F): 400 mmHg 

FRZ: -137°F 

UEL: 8.7% 

LEL: 1.1% 

Class IB Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: Daily 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Strong oxidizers (e.g., chlorine, bromine, fluorine) 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, nose, throat; dizz, euph, inco, nau, vomit, 

stupor; dry, cracking skin 

TO: Eyes, skin, resp sys, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash 

Breath: Resp support 

Swallow: Medical attention immed 

C 

Cyhexatin Formula: 

(C6H11)3SnOH 

CAS#: 

13121-70-5 

RTECS#: 

WH8750000 

IDLH: 80 mg/m3

 

[25 mg/m3

 (as Sn)] 

Conversion: DOT: 

Synonyms/Trade Names: TCHH, Tricyclohexylhydroxystannane, Tricyclohexylhydroxytin, 

Tricyclohexylstannium hydroxide, Tricyclohexyltin hydroxide 

Exposure Limits: 

NIOSH REL: TWA 5 mg/m3

OSHA PEL†: TWA 0.32 mg/m3 [0.1 mg/m3 (as Sn)] 

Physical Description: Colorless to white, nearly odorless, crystalline powder. 

[insecticide] 

Measurement Methods 

(see Table 1): 

NIOSH 5504 

Chemical & Physical 

Properties: 

MW: 385.2 

BP: 442°F (Decomposes) 

Sol: Insoluble 

Fl.P: NA 

IP: NA 

Sp.Gr: ? 

VP: 0 mmHg (approx) 

MLT: 383°F 

UEL: NA 

LEL: NA 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: N.R. 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

OSHA 

3.2 mg/m3

: CcrOv95/Sa 

8 mg/m3

: Sa:Cf/PaprOvHie 

16 mg/m3: CcrFOv100/GmFOv100/ 

 PaprTOvHie/SaT:Cf/ScbaF/SaF 

80 mg/m3

: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, ultraviolet light 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, resp sys; head, dizz; sore throat, cough; abdom 

pain, vomit; skin burns, pruritus; in animals: liver, kidney damage 

TO: Eyes, skin, resp sys, liver, kidneys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

87
2,4-D Formula: 

Cl2C6H3OCH2COOH 

CAS#: 

94-75-7 

RTECS#: 

AG6825000 

IDLH: 

100 mg/m3

Conversion: DOT: 2765 152 

Synonyms/Trade Names: Dichlorophenoxyacetic acid; 2,4-Dichlorophenoxyacetic acid 

Exposure Limits: 

NIOSH REL: TWA 10 mg/m3

OSHA PEL: TWA 10 mg/m3

Physical Description: White to yellow, crystalline, odorless powder. [herbicide] 

Measurement Methods 

(see Table 1): 

NIOSH 5001 

Chemical & Physical Properties: 

MW: 221.0 

BP: Decomposes 

Sol: 0.05% 

Fl.P: NA 

IP: ? 

Sp.Gr: 1.57 

VP(320°F): 0.4 mmHg 

MLT: 280°F 

UEL: NA 

LEL: NA 

Noncombustible Solid, but may be 

dissolved in flammable liquids. 

Personal Protection/Sanitation

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

100 mg/m3

: CcrOv95/GmFOv100/ 

 PaprOvHie/Sa/ScbaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Lass, stupor, hyporeflexia, musc twitch; convuls; derm; in 

animals: liver, kidney inj 

TO: Skin, CNS, liver, kidneys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 

D 

DDT Formula: 

(C6H4Cl)2CHCCl3

CAS#: 

50-29-3 

RTECS#: 

KJ3325000 

IDLH: 

Ca [500 mg/m3] 

Conversion: DOT: 2761 151 

Synonyms/Trade Names: p,p'-DDT; Dichlorodiphenyltrichloroethane; 

1,1,1-Trichloro-2,2-bis(p-chlorophenyl)ethane 

Exposure Limits: 

NIOSH REL: Ca 

 TWA 0.5 mg/m3

 

 See Appendix A 

OSHA PEL: TWA 1 mg/m3

 [skin] 

Measurement Methods 

(see Table 1): 

NIOSH S274 (II-3) 

Physical Description: Colorless crystals or off-white powder with a slight, aromatic odor. [pesticide] 

Chemical & Physical Properties: 

MW: 354.5 

BP: 230°F (Decomposes) 

Sol: Insoluble 

Fl.P: 162-171°F 

IP: ? 

Sp.Gr: 0.99 

VP: 0.0000002 mmHg 

MLT: 227°F 

UEL: ? 

LEL: ? 

Combustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam/Daily 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, alkalis 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin; pares tongue, lips, face; tremor; anxi, dizz, 

conf, mal, head, lass; convuls; paresis hands; vomit; [carc] 

TO: Eyes, skin, CNS, kidneys, liver, PNS [in animals: liver, lung 

& lymphatic tumors] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 

88
Decaborane Formula: 

BB

10H14

CAS#: 

17702-41-9 

RTECS#: 

HD1400000 

IDLH: 

15 mg/m3

Conversion: 1 ppm = 5.00 mg/m3 DOT: 1868 134 

Synonyms/Trade Names: Decaboron tetradecahydride 

Exposure Limits: 

NIOSH REL: TWA 0.3 mg/m3 (0.05 ppm) [skin] 

 ST 0.9 mg/m3 (0.15 ppm) 

OSHA PEL†: TWA 0.3 mg/m3

 (0.05 ppm) [skin] 

Physical Description: Colorless to white crystalline solid with an intense, bitter, 

chocolate-like odor. 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical Properties: 

MW: 122.2 

BP: 415°F 

Sol: Slight 

Fl.P: 176°F 

IP: 9.88 eV 

Sp.Gr: 0.94 

VP: 0.2 mmHg 

MLT: 211°F 

UEL: ? 

LEL: ? 

Combustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam/Daily 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

3 mg/m3

: Sa 

7.5 mg/m3

: Sa:Cf 

15 mg/m3

: SaT:Cf/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Incompatibilities and Reactivities: Oxidizers, water, halogenated compounds (especially carbon tetrachloride) 

[Note: May ignite SPONTANEOUSLY on exposure to air. Decomposes slowly in hot water.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Dizz, head, nau, drow; inco, local musc spasm, tremor, 

convuls; lass; in animals: dysp; lass; liver, kidney damage 

TO: CNS, liver, kidneys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

D 

1-Decanethiol Formula: 

CH3(CH2)9SH 

CAS#: 

143-10-2 

RTECS#: IDLH: 

N.D. 

Conversion: 1 ppm = 7.13 mg/m3 DOT: 1228 131 

Synonyms/Trade Names: Decylmercaptan, n-Decylmercaptan, 1-Mercaptodecane 

Exposure Limits: 

NIOSH REL: C 0.5 ppm (3.6 mg/m3

) [15-minute] 

OSHA PEL: none 

Physical Description: Colorless liquid with a strong odor. 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical 

Properties: 

MW: 174.4 

BP: 465°F 

Sol: Insoluble 

Fl.P: 209°F 

IP: ? 

Sp.Gr: 0.84 

VP: ? 

FRZ: -15°F 

UEL: ? 

LEL: ? 

Class IIIB Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

5 ppm: CcrOv/Sa 

12.5 ppm: Sa:Cf/PaprOv 

25 ppm: CcrFOv/GmFOv/PaprTOv/ 

 ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Oxidizers, strong acids & bases, alkali metals, nitric acid 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, resp sys; conf, dizz, head, drow, nau, vomit, 

lass, convuls 

TO: Eyes, skin, resp sys, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash 

Breath: Resp support 

Swallow: Medical attention immed 

89
Demeton Formula: 

(C2H5O)2PSOC2H4SC2H5

CAS#: 

8065-48-3 

RTECS#: 

TF3150000 

IDLH: 

10 mg/m3

Conversion: DOT: 

Synonyms/Trade Names: O-O-Diethyl-O(and S)-2-(ethylthio)ethyl phosphorothioate mixture, Systox® 

Exposure Limits: 

NIOSH REL: TWA 0.1 mg/m3 [skin] 

OSHA PEL: TWA 0.1 mg/m3

 [skin] 

Physical Description: Amber, oily liquid with a sulfur-like odor. [insecticide] 

Measurement Methods 

(see Table 1): 

NIOSH 5514 

Chemical & Physical 

Properties: 

MW: 258.3 

BP: Decomposes 

Sol: 0.01% 

Fl.P: 113°F 

IP: ? 

Sp.Gr: 1.12 

VP: 0.0003 mmHg 

FRZ: <-13°F 

UEL: ? 

LEL: ? 

Class II Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

1 mg/m3

: Sa 

2.5 mg/m3: Sa:Cf 

5 mg/m3

: SaT:Cf/ScbaF/SaF 

10 mg/m3

: Sa:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, alkalis, water 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin; miosis, ache eyes, rhin, head; chest tight, wheez, lar 

spasm, salv, cyan; anor, nau, vomit, abdom cramps, diarr; local sweat; 

musc fasc, lass, para; dizz, conf, ataxia; convuls, coma; low BP; card irreg

TO: Eyes, skin, resp sys, CVS, CNS, blood chol 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

D 

Diacetone alcohol Formula: 

CH3COCH2C(CH3)2OH 

CAS#: 

123-42-2 

RTECS#: 

SA9100000 

IDLH: 

1800 ppm [10%LEL]

Conversion: 1 ppm = 4.75 mg/m3 DOT: 1148 129 

Synonyms/Trade Names: Diacetone, 4-Hydroxy-4-methyl-2-pentanone, 2-Methyl-2-pentanol-4-one 

Exposure Limits: 

NIOSH REL: TWA 50 ppm (240 mg/m3

) 

OSHA PEL: TWA 50 ppm (240 mg/m3

) 

Physical Description: Colorless liquid with a faint, minty odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1402, 1405 

OSHA 7 

Chemical & Physical 

Properties: 

MW: 116.2 

BP: 334°F 

Sol: Miscible 

Fl.P: 125°F 

IP: ? 

Sp.Gr: 0.94 

VP: 1 mmHg 

FRZ: -47°F 

UEL: 6.9% 

LEL: 1.8% 

Class II Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

1250 ppm: Sa:Cf£/PaprOv£ 

1800 ppm: CcrFOv/GmFOv/PaprTOv£/ 

 ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, strong alkalis 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, nose, throat; corn damage; in animals: narco, 

liver damage 

TO: Eyes, skin, resp sys, CNS, liver 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush prompt 

Breath: Resp support 

Swallow: Medical attention immed 

90
2,4-Diaminoanisole (and its salts) Formula: 

(NH2)2C6H3OCH3

CAS#: 

615-05-4 

RTECS#: 

BZ8580500 

IDLH: 

Ca [N.D.] 

Conversion: DOT: 

Synonyms/Trade Names: 1,3-Diamino-4-methoxybenzene; 4-Methoxy-1,3-benzene-diamine; 

4-Methoxy-m-phenylene-diamine (Synonyms of salts vary depending upon the specific compound.) 

Exposure Limits: 

NIOSH REL: Ca 

 Minimize occupational exposure (especially skin exposures) 

 See Appendix A 

OSHA PEL: none 

Physical Description: Colorless solid (needles). 

[Note: The primary use (including its salts such as 2,4-diaminoanisole sulfate) is a 

component of hair & fur dye formulations.] 

Measurement Methods 

(see Table 1): 

None available 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam/Daily 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Chemical & Physical Properties: 

MW: 138.2 

BP: ? 

Sol: ? 

Fl.P: ? 

IP: ? 

Sp.Gr: ? 

VP: ? 

MLT: 153°F 

UEL: ? 

LEL: ? 

Combustible Solid Incompatibilities and Reactivities: Strong oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: In animals: irrit skin; thyroid, liver changes; terato effects; [carc] 

TO: Skin, thyroid, liver, repro sys [in animals: thyroid, liver, skin & 

lymphatic sys tumors] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

D 

o-Dianisidine Formula: 

(NH2C6H3OCH3)2

CAS#: 

119-90-4 

RTECS#: 

DD0875000 

IDLH: 

Ca [N.D.] 

Conversion: DOT: 

Synonyms/Trade Names: Dianisidine; 3,3'-Dianisidine; 3,3'-Dimethoxybenzidine 

Exposure Limits: 

NIOSH REL: Ca 

 See Appendix A 

 See Appendix C 

OSHA PEL: See Appendix C 

Physical Description: Colorless crystals that turn a violet color on standing. 

[Note: Used as a basis for many dyes.] 

Measurement Methods 

(see Table 1): 

NIOSH 5013 

OSHA 71 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam/Daily 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Chemical & Physical Properties: 

MW: 244.3 

BP: ? 

Sol: Insoluble 

Fl.P: 403°F 

IP: ? 

Sp.Gr: ? 

VP: ? 

MLT: 279°F 

UEL: ? 

LEL: ? 

Combustible Solid Incompatibilities and Reactivities: Oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit skin; in animals: kidney, liver damage; thyroid, spleen changes; [carc]

TO: Skin, kidneys, liver, thyroid, liver [in animals: bladder, liver, stomach & 

mammary gland tumors] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

91
Diazinon® Formula: 

C12H21N2O3PS 

CAS#: 

333-41-5 

RTECS#: 

TF3325000 

IDLH: 

N.D. 

Conversion: DOT: 2783 152 

Synonyms/Trade Names: Basudin®; Diazide®; 

O,O-Diethyl-O-2-isopropyl-4-methyl-6-pyrimidinyl-phosphorothioate; Spectracide® 

Exposure Limits: 

NIOSH REL: TWA 0.1 mg/m3

 [skin] 

OSHA PEL†: none 

Physical Description: Colorless liquid with a faint ester-like odor. [insecticide] 

[Note: Technical grade is pale to dark brown.] 

Measurement Methods 

(see Table 1): 

NIOSH 5600 

OSHA 62 

Chemical & Physical Properties: 

MW: 304.4 

BP: Decomposes 

Sol: 0.004% 

Fl.P: 180°F 

IP: ? 

Sp.Gr: 1.12 

VP: 0.0001 mmHg 

FRZ: ? 

UEL: ? 

LEL: ? 

Class IIIA Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Strong acids & alkalis, copper-containing compounds 

[Note: Hydrolyzes slowly in water & dilute acid.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes; miosis, blurred vision; dizz, conf, lass, convuls; 

dysp; salv, abdom cramps, nau, vomit 

TO: Eyes, resp sys, CNS, CVS, blood chol 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

D 

Diazomethane Formula: 

CH2N2

CAS#: 

334-88-3 

RTECS#: 

PA7000000 

IDLH: 

2 ppm 

Conversion: 1 ppm = 1.72 mg/m3 DOT: 

Synonyms/Trade Names: Azimethylene, Azomethylene, Diazirine 

Exposure Limits: 

NIOSH REL: TWA 0.2 ppm (0.4 mg/m3

) 

OSHA PEL: TWA 0.2 ppm (0.4 mg/m3

) 

Physical Description: Yellow gas with a musty odor. [Note: Shipped as a liquefied 

compressed gas.] 

Measurement Methods 

(see Table 1): 

NIOSH 2515 

Chemical & Physical 

Properties: 

MW: 42.1 

BP: -9°F 

Sol: Reacts 

Fl.P: NA (Gas) 

IP: 9.00 eV 

RGasD: 1.45 

VP: >1 atm 

FRZ: -229°F 

UEL: ? 

LEL: ? 

Flammable Gas [EXPLOSIVE!] 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Frostbite 

Eyes: Frostbite 

Wash skin: N.R. 

Remove: When wet (flamm) 

Change: N.R. 

Provide: Frostbite wash 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

2 ppm: Sa*/ScbaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Alkali metals, water, drying agents such as calcium arsenate 

[Note: May explode violently on heating, exposure to sunlight, or contact with rough edges such as ground glass.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con (liquid) 

SY: Irrit eyes; cough, short breath; head, lass; flush skin, fever; 

chest pain, pulm edema, pneu; asthma; liquid: frostbite 

TO: Eyes, resp sys 

First Aid (see Table 6): 

Eye: Frostbite 

Skin: Frostbite 

Breath: Resp support 

92
Diborane Formula: 

BB

2H6

CAS#: 

19287-45-7 

RTECS#: 

HQ9275000 

IDLH: 

15 ppm 

Conversion: 1 ppm = 1.13 mg/m3 DOT: 1911 119 

Synonyms/Trade Names: Boroethane, Boron hydride, Diboron hexahydride 

Exposure Limits: 

NIOSH REL: TWA 0.1 ppm (0.1 mg/m3) 

OSHA PEL: TWA 0.1 ppm (0.1 mg/m3

) 

Measurement Methods 

(see Table 1): 

NIOSH 6006 

Physical Description: Colorless gas with a repulsive, sweet odor. 

[Note: Usually shipped in pressurized cylinders diluted with hydrogen, argon, nitrogen, or helium.] 

Chemical & Physical Properties: 

MW: 27.7 

BP: -135°F 

Sol: Reacts 

Fl.P: NA (Gas) 

IP: 11.38 eV 

RGasD: 0.97 

VP(62°F): 39.5 atm 

FRZ: -265°F 

UEL: 88% 

LEL: 0.8% 

Flammable Gas 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

1 ppm: Sa 

2.5 ppm: Sa:Cf 

5 ppm: SaT:Cf/ScbaF/SaF 

15 ppm: Sa:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFS/ScbaE 

Incompatibilities and Reactivities: Water, halogenated compounds, aluminum, lithium, oxidized surfaces, acids 

[Note: Will ignite spontaneously in moist air at room temperature. Reacts with water to form hydrogen & boric acid.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh 

SY: Chest tight, precordial pain, short breath, nonproductive 

cough, nau; head, dizz, chills, fever, lass, tremor, musc fasc; 

in animals: liver, kidney damage; pulm edema; hemorr 

TO: Resp sys, CNS, liver, kidneys 

First Aid (see Table 6): 

Breath: Resp support 

D 

1,2-Dibromo-3-chloropropane Formula: 

CH2BrCHBrCH2Cl 

CAS#: 

96-12-8 

RTECS#: 

TX8750000 

IDLH: 

Ca [N.D.] 

Conversion: 1 ppm = 9.67 mg/m3 DOT: 2872 159 

Synonyms/Trade Names: 1-Chloro-2,3-dibromopropane; DBCP; Dibromochloropropane 

Exposure Limits: 

NIOSH REL: Ca 

 See Appendix A 

OSHA PEL: [1910.1044] TWA 0.001 ppm 

Measurement Methods 

(see Table 1): 

None available 

Physical Description: Dense yellow or amber liquid with a pungent odor at high concentrations. [pesticide] 

[Note: A solid below 43°F.] 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam/Daily 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

See Appendix E (page 351) 

Chemical & Physical Properties: 

MW: 236.4 

BP: 384°F 

Sol: 0.1% 

Fl.P(oc): 170°F 

IP: ? 

Sp.Gr: 2.05 

VP: 0.8 mmHg 

FRZ: 43°F 

UEL: ? 

LEL: ? 

Class IIIA Combustible Liquid 

Incompatibilities and Reactivities: Chemically-active metals such as 

aluminum, magnesium & tin alloys [Note: Corrosive to metals.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, nose, throat; drow; nau, vomit; pulm edema; liver, 

kidney inj; sterility; [carc] 

TO: Eyes, skin, resp sys, CNS, liver, kidneys, spleen, repro sys, 

digestive sys [in animals: cancer of the nasal cavity, tongue, pharynx, 

lungs, stomach, adrenal & mammary glands] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

93
2-N-Dibutylaminoethanol Formula: 

(C4H9)2NCH2CH2OH 

CAS#: 

102-81-8 

RTECS#: 

KK3850000 

IDLH: 

N.D. 

Conversion: 1 ppm = 7.09 mg/m3 DOT: 2873 153 

Synonyms/Trade Names: Dibutylaminoethanol; 2-Dibutylaminoethanol; 2-Di-N-butylaminoethanol; 

2-Di-N-butylaminoethyl alcohol; N,N-Dibutylethanolamine 

Exposure Limits: 

NIOSH REL: TWA 2 ppm (14 mg/m3

) [skin] 

OSHA PEL†: none 

Physical Description: Colorless liquid with a faint, amine-like odor. 

Measurement Methods 

(see Table 1): 

NIOSH 2007 

Chemical & Physical Properties: 

MW: 173.3 

BP: 446°F 

Sol: 0.4% 

Fl.P: 195°F 

IP: ? 

Sp.Gr: 0.86 

VP: 0.1 mmHg 

FRZ: ? 

UEL: ? 

LEL: ? 

Class IIIA Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: In animals: irrit eyes, skin, nose; derm; skin, corn nec; low-wgt 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

D 

2,6-Di-tert-butyl-p-cresol Formula: 

[C(CH3)3]2CH3C6H2OH 

CAS#: 

128-37-0 

RTECS#: 

GO7875000 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: BHT; Butylated hydroxytoluene; Dibutylated hydroxytoluene; 

4-Methyl-2,6-di-tert-butyl phenol 

Exposure Limits: 

NIOSH REL: TWA 10 mg/m3

OSHA PEL†: none 

Physical Description: White to pale-yellow, crystalline solid with a slight, phenolic 

odor. [food preservative] 

Measurement Methods 

(see Table 1): 

NIOSH P&CAM226 (II-1) 

OSHA PV2108 

Chemical & Physical Properties: 

MW: 220.4 

BP: 509°F 

Sol: 0.00004% 

Fl.P: 261°F 

IP: ? 

Sp.Gr: 1.05 

VP: 0.01 mmHg 

MLT: 158°F 

UEL: ? 

LEL: ? 

Class IIIB Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin; in animals: decr growth rate, incr liver weight 

TO: Eyes, skin 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash 

Breath: Fresh air 

Swallow: Medical attention immed 

94
Dibutyl phosphate Formula: 

(C4H9O)2(OH)PO 

CAS#: 

107-66-4 

RTECS#: 

TB9605000 

IDLH: 

30 ppm 

Conversion: 1 ppm = 8.60 mg/m3 DOT: 

Synonyms/Trade Names: Dibutyl acid o-phosphate, Di-n-butyl hydrogen phosphate, Dibutyl phosphoric acid 

Exposure Limits: 

NIOSH REL: TWA 1 ppm (5 mg/m3) 

 ST 2 ppm (10 mg/m3) 

OSHA PEL†: TWA 1 ppm (5 mg/m3

) 

Physical Description: Pale-amber, odorless liquid. 

Measurement Methods 

(see Table 1): 

NIOSH 5017 

Chemical & Physical 

Properties: 

MW: 210.2 

BP: 212°F (Decomposes) 

Sol: Insoluble 

Fl.P: ? 

IP: ? 

Sp.Gr: 1.06 

VP: 1 mmHg (approx) 

FRZ: ? 

UEL: ? 

LEL: ? 

Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

10 ppm: Sa 

25 ppm: Sa:Cf 

30 ppm: SaT:Cf/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, resp sys; head 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 

D 

Dibutyl phthalate Formula: 

C6H4(COOC4H9)2

CAS#: 

84-74-2 

RTECS#: 

TI0875000 

IDLH: 

4000 mg/m3

Conversion: 1 ppm = 11.57 mg/m3 DOT: 

Synonyms/Trade Names: DBP; Dibutyl-1,2-benzene-dicarboxylate; Di-n-butyl phthalate 

Exposure Limits: 

NIOSH REL: TWA 5 mg/m3

OSHA PEL: TWA 5 mg/m3

Physical Description: Colorless to faint-yellow, oily liquid with a slight, aromatic odor. 

Measurement Methods 

(see Table 1): 

NIOSH 5020 

OSHA 104 

Chemical & Physical 

Properties: 

MW: 278.3 

BP: 644°F 

Sol(77°F): 0.001% 

Fl.P: 315°F 

IP: ? 

Sp.Gr: 1.05 

VP: 0.00007 mmHg 

FRZ: -31°F 

UEL: ? 

LEL(456°F): 0.5% 

Class IIIB Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: Prevent eye contact 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

50 mg/m3

: 95F 

125 mg/m3

: Sa:Cf£/PaprHie£ 

250 mg/m3: 100F/ScbaF/SaF 

4000 mg/m3

: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Incompatibilities and Reactivities: Nitrates; strong oxidizers, alkalis & acids; liquid chlorine 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, upper resp sys, stomach 

TO: Eyes, resp sys, GI tract 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Wash regularly 

Breath: Resp support 

Swallow: Medical attention immed 

95
Dichloroacetylene Formula: 

C2Cl2

CAS#: 

7572-29-4 

RTECS#: 

AP1080000 

IDLH: 

Ca [N.D.] 

Conversion: 1 ppm = 3.88 mg/m3 DOT: 

Synonyms/Trade Names: DCA, Dichloroethyne 

[Note: DCA is a possible decomposition product of trichloroethylene or trichloroethane.] 

Exposure Limits: 

NIOSH REL: Ca 

 C 0.1 ppm (0.4 mg/m3

) 

 See Appendix A 

OSHA PEL†: none 

Physical Description: Volatile oil with a disagreeable, sweetish odor. 

[Note: A gas above 90°F. DCA is not produced commercially.] 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical Properties: 

MW: 94.9 

BP: 90°F (Explodes) 

Sol: ? 

Fl.P: ? 

IP: ? 

Sp.Gr: 1.26 

VP: ? 

FRZ: -58 to -87°F 

UEL: ? 

LEL: ? 

Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Oxidizers, heat, shock 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Head, loss of appetite, nau, vomit, intense jaw pain, cranial 

nerve palsy; in animals: kidney, liver, brain inj; low-wgt; [carc] 

TO: CNS [in animals: kidney tumors] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

D 

o-Dichlorobenzene Formula: 

C6H4Cl2

CAS#: 

95-50-1 

RTECS#: 

CZ4500000 

IDLH: 

200 ppm 

Conversion: 1 ppm = 6.01 mg/m3 DOT: 1591 152 

Synonyms/Trade Names: o-DCB; 1,2-Dichlorobenzene; ortho-Dichlorobenzene; o-Dichlorobenzol 

Exposure Limits: 

NIOSH REL: C 50 ppm (300 mg/m3

) 

OSHA PEL: C 50 ppm (300 mg/m3

) 

Physical Description: Colorless to pale-yellow liquid with a pleasant, aromatic odor. 

[herbicide] 

Measurement Methods 

(see Table 1): 

NIOSH 1003 

OSHA 7 

Chemical & Physical 

Properties: 

MW: 147.0 

BP: 357°F 

Sol: 0.01% 

Fl.P: 151°F 

IP: 9.06 eV 

Sp.Gr: 1.30 

VP: 1 mmHg 

FRZ: 1°F 

UEL: 9.2% 

LEL: 2.2% 

Class IIIA Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

200 ppm: CcrFOv/PaprOv£/ 

 ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, aluminum, chlorides, acids, acid fumes 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, nose; liver, kidney damage; skin blisters 

TO: Eyes, skin, resp sys, liver, kidneys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 

96
p-Dichlorobenzene Formula: 

C6H4Cl2

CAS#: 

106-46-7 

RTECS#: 

CZ4550000 

IDLH: 

Ca [150 ppm] 

Conversion: 1 ppm = 6.01 mg/m3 DOT: 

Synonyms/Trade Names: p-DCB; 1,4-Dichlorobenzene; para-Dichlorobenzene; Dichlorocide 

Exposure Limits: 

NIOSH REL: Ca 

 See Appendix A 

OSHA PEL†: TWA 75 ppm (450 mg/m3

) 

Measurement Methods 

(see Table 1): 

NIOSH 1003 

OSHA 7 

Physical Description: Colorless or white crystalline solid with a mothball-like odor. [insecticide] 

Chemical & Physical Properties: 

MW: 147.0 

BP: 345°F 

Sol: 0.008% 

Fl.P: 150°F 

IP: 8.98 eV 

Sp.Gr: 1.25 

VP: 1.3 mmHg 

MLT: 128°F 

UEL: ? 

LEL: 2.5% 

Combustible Solid, but may take 

some effort to ignite. 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam/Daily 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers (such as chlorine or permanganate) 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Eye irrit, swell periorb; profuse rhinitis; head, anor, nau, 

vomit; low-wgt, jaun, cirr; in animals: liver, kidney inj; [carc] 

TO: Liver, resp sys, eyes, kidneys, skin [in animals: liver & 

kidney cancer] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash 

Breath: Resp support 

Swallow: Medical attention immed 

D 

3,3'-Dichlorobenzidine (and its salts) Formula: 

NH2ClC6H3C6H3ClNH2

CAS#: 

91-94-1 

RTECS#: 

DD0525000 

IDLH: 

Ca [N.D.] 

Conversion: DOT: 

Synonyms/Trade Names: 4,4'-Diamino-3,3'-dichlorobiphenyl; Dichlorobenzidine base; o,o'-Dichlorobenzidine; 

3,3'-Dichlorobiphenyl-4,4'-diamine; 3,3'-Dichloro-4,4'-biphenyldiamine; 3,3'-Dichloro-4,4'-diaminobiphenyl 

Exposure Limits: 

NIOSH REL: Ca 

 See Appendix A 

OSHA PEL: [1910.1007] See Appendix B 

Physical Description: Gray to purple, crystalline solid. 

Measurement Methods 

(see Table 1): 

NIOSH 5509 

OSHA 65 

Chemical & Physical 

Properties: 

MW: 253.1 

BP: 788°F 

Sol(59°F): 0.07% 

Fl.P: ? 

IP: ? 

Sp.Gr: ? 

VP: ? 

MLT: 271°F 

UEL: ? 

LEL: ? 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam/Daily 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

See Appendix E (page 351) 

Incompatibilities and Reactivities: None reported 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Skin sens, derm; head, dizz; caustic burns; frequent urination, 

dysuria; hema; GI upset; upper resp infection; [carc] 

TO: Bladder, liver, lung, skin, GI tract [in animals: liver & bladder cancer] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

97
Dichlorodifluoromethane Formula: 

CCl2F2

CAS#: 

75-71-8 

RTECS#: 

PA8200000 

IDLH: 

15,000 ppm 

Conversion: 1 ppm = 4.95 mg/m3 DOT: 1028 126 

Synonyms/Trade Names: Difluorodichloromethane, Fluorocarbon 12, Freon® 12, Genetron® 12, Halon® 122, 

Propellant 12, Refrigerant 12 

Exposure Limits: 

NIOSH REL: TWA 1000 ppm (4950 mg/m3

) 

OSHA PEL: TWA 1000 ppm (4950 mg/m3) 

Physical Description: Colorless gas with an ether-like odor at extremely high 

concentrations. [Note: Shipped as a liquefied compressed gas.] 

Measurement Methods 

(see Table 1): 

NIOSH 1018 

Chemical & Physical 

Properties: 

MW: 120.9 

BP: -22°F 

Sol(77°F): 0.03% 

Fl.P: NA 

IP: 11.75 eV 

RGasD: 4.2 

VP: 5.7 atm 

FRZ: -252°F 

UEL: NA 

LEL: NA 

Nonflammable Gas 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Frostbite 

Eyes: Frostbite 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Provide: Frostbite wash 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

10,000 ppm: Sa 

15,000 ppm: Sa:Cf/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Chemically-active metals such as sodium, potassium, calcium, 

powdered aluminum, zinc & magnesium 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con (liquid) 

SY: Dizz, tremor, asphy, uncon, card arrhy, card arrest; liquid: frostbite 

TO: CVS, PNS 

First Aid (see Table 6): 

Eye: Frostbite 

Skin: Frostbite 

Breath: Resp support 

D 

1,3-Dichloro-5,5-dimethylhydantoin Formula: 

C5H6Cl2N2O2

CAS#: 

118-52-5 

RTECS#: 

MU0700000 

IDLH: 

5 mg/m3

Conversion: DOT: 

Synonyms/Trade Names: Dactin, DDH, Halane 

Exposure Limits: 

NIOSH REL: TWA 0.2 mg/m3

 

 ST 0.4 mg/m3

OSHA PEL†: TWA 0.2 mg/m3

Physical Description: White powder with a chlorine-like odor. 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical Properties: 

MW: 197.0 

BP: ? 

Sol: 0.2% 

Fl.P: 346°F 

IP: ? 

Sp.Gr: 1.5 

VP: ? 

MLT: 270°F 

UEL: ? 

LEL: ? 

Combustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

2 mg/m3

: Sa 

5 mg/m3

: Sa:Cf/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFS100/ScbaE 

Incompatibilities and Reactivities: Water, strong acids, easily oxidized materials such as ammonia salts & 

sulfides 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, muc memb, resp sys 

TO: Eyes, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 

98
1,1-Dichloroethane Formula: 

CHCl2CH3

CAS#: 

75-34-3 

RTECS#: 

KI0175000 

IDLH: 

3000 ppm 

Conversion: 1 ppm = 4.05 mg/m3 DOT: 2362 130 

Synonyms/Trade Names: Asymmetrical dichloroethane; Ethylidene chloride; 1,1-Ethylidene dichloride 

Exposure Limits: 

NIOSH REL: TWA 100 ppm (400 mg/m3) 

 See Appendix C (Chloroethanes) 

OSHA PEL: TWA 100 ppm (400 mg/m3

) 

Physical Description: Colorless, oily liquid with a chloroform-like odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1003 

OSHA 7 

Chemical & Physical Properties: 

MW: 99.0 

BP: 135°F 

Sol: 0.6% 

Fl.P: 2°F 

IP: 11.06 eV 

Sp.Gr: 1.18 

VP: 182 mmHg 

FRZ: -143°F 

UEL: 11.4% 

LEL: 5.4% 

Class IB Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

1000 ppm: Sa 

2500 ppm: Sa:Cf 

3000 ppm: ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, strong caustics 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit skin; CNS depres; liver, kidney, lung damage 

TO: Skin, liver, kidneys, lungs, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap flush prompt 

Breath: Resp support 

Swallow: Medical attention immed 

D 

1,2-Dichloroethylene Formula: 

ClCH=CHCl 

CAS#: 

540-59-0 

RTECS#: 

KV9360000 

IDLH: 

1000 ppm 

Conversion: 1 ppm = 3.97 mg/m3 DOT: 1150 130P 

Synonyms/Trade Names: Acetylene dichloride, cis-Acetylene dichloride, trans-Acetylene dichloride, 

sym-Dichloroethylene 

Exposure Limits: 

NIOSH REL: TWA 200 ppm (790 mg/m3

) 

OSHA PEL: TWA 200 ppm (790 mg/m3

) 

Physical Description: Colorless liquid (usually a mixture of the cis & trans isomers) 

with a slightly acrid, chloroform-like odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1003 

OSHA 7 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

1000 ppm: Sa:Cf£/PaprOv£/CcrFOv/ 

 GmFOv/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Chemical & Physical 

Properties: 

MW: 97.0 

BP: 118-140°F 

Sol: 0.4% 

Fl.P: 36-39°F 

IP: 9.65 eV 

Sp.Gr(77°F): 1.27 

VP: 180-265 mmHg 

FRZ: -57 to -115°F 

UEL: 12.8% 

LEL: 5.6% 

Class IB Flammable Liquid 

Incompatibilities and Reactivities: Strong oxidizers, strong alkalis, potassium 

hydroxide, copper [Note: Usually contains inhibitors to prevent polymerization.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, resp sys; CNS depres 

TO: Eyes, resp sys, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 

99
Dichloroethyl ether Formula: 

(ClCH2CH2)2O 

CAS#: 

111-44-4 

RTECS#: 

KN0875000 

IDLH: 

Ca [100 ppm] 

Conversion: 1 ppm = 5.85 mg/m3 DOT: 1916 152 

Synonyms/Trade Names: bis(2-Chloroethyl)ether; 2,2'-Dichlorodiethyl ether, 2,2'-Dichloroethyl ether 

Exposure Limits: 

NIOSH REL: Ca 

 TWA 5 ppm (30 mg/m3

) 

 ST 10 ppm (60 mg/m3) [skin] 

 See Appendix A 

OSHA PEL†: TWA 15 ppm (90 mg/m3

) [skin] 

Physical Description: Colorless liquid with a chlorinated solvent-like odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1004 

OSHA 7 

Chemical & Physical 

Properties: 

MW: 143.0 

BP: 352°F 

Sol: 1% 

Fl.P: 131°F 

IP: ? 

Sp.Gr: 1.22 

VP: 0.7 mmHg 

FRZ: -58°F 

UEL: ? 

LEL: 2.7% 

Class II Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers 

[Note: Decomposes in presence of moisture to form hydrochloric acid.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit nose, throat, resp sys; lac; cough; nau, vomit; in animals: 

pulm edema; liver damage; [carc] 

TO: Eyes, resp sys, liver [in animals: liver tumors] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash 

Breath: Resp support 

Swallow: Medical attention immed 

D 

Dichloromonofluoromethane Formula: 

CHCl2F 

CAS#: 

75-43-4 

RTECS#: 

PA8400000 

IDLH: 

5000 ppm 

Conversion: 1 ppm = 4.21 mg/m3 DOT: 1029 126 

Synonyms/Trade Names: Dichlorofluoromethane, Fluorodichloromethane, Freon® 21, Genetron® 21, 

Halon® 112, Refrigerant 21 

Exposure Limits: 

NIOSH REL: TWA 10 ppm (40 mg/m3

) 

OSHA PEL†: TWA 1000 ppm (4200 mg/m3) 

Physical Description: Colorless gas with a slight, ether-like odor. 

[Note: A liquid below 48°F. Shipped as a liquefied compressed gas.] 

Measurement Methods 

(see Table 1): 

NIOSH 2516 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Frostbite 

Eyes: Frostbite 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Provide: Frostbite wash 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

100 ppm: Sa 

250 ppm: Sa:Cf 

500 ppm: ScbaF/SaF 

5000 ppm: Sa:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Chemical & Physical 

Properties: 

MW: 102.9 

BP: 48°F 

Sol(86°F): 0.7% 

Fl.P: NA 

IP: 12.39 eV 

RGasD: 3.57 

VP(70°F): 1.6 atm 

FRZ: -211°F 

UEL: NA 

LEL: NA 

Nonflammable Gas 

Incompatibilities and Reactivities: Chemically-active metals such as sodium, 

potassium, calcium, powdered aluminum, zinc & magnesium; acid; acid fumes 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con (liquid) 

SY: Asphy, card arrhy, card arrest; liquid: frostbite 

TO: Resp sys, CVS 

First Aid (see Table 6): 

Eye: Frostbite 

Skin: Frostbite 

Breath: Resp support 

100
1,1-Dichloro-1-nitroethane Formula: 

CH3CCl2NO2

CAS#: 

594-72-9 

RTECS#: 

KI0500000 

IDLH: 

25 ppm 

Conversion: 1 ppm = 5.89 mg/m3 DOT: 2650 153 

Synonyms/Trade Names: Dichloronitroethane 

Exposure Limits: 

NIOSH REL: TWA 2 ppm (10 mg/m3) 

OSHA PEL†: C 10 ppm (60 mg/m3

) 

Physical Description: Colorless liquid with an unpleasant odor. [fumigant] 

Measurement Methods 

(see Table 1): 

NIOSH 1601 

OSHA 7 

Chemical & Physical 

Properties: 

D 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

MW: 143.9 NIOSH 

BP: 255°F 20 ppm: Sa 

Sol: 0.3% 

Fl.P: 136°F 

IP: ? 

Sp.Gr: 1.43 

VP: 15 mmHg 

FRZ: ? 

UEL: ? 

LEL: ? 

25 ppm: Sa:Cf/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Class II Combustible Liquid 

Incompatibilities and Reactivities: Strong oxidizers [Note: Corrosive to iron in presence of moisture.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: In animals: irrit eyes, skin; liver, heart, kidney damage; pulm 

edema, hemorr 

TO: Eyes, skin, resp sys, liver, kidneys, CVS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

1,3-Dichloropropene Formula: 

ClHC=CHCH2Cl 

CAS#: 

542-75-6 

RTECS#: 

UC8310000 

IDLH: 

Ca [N.D.] 

Conversion: 1 ppm = 4.54 mg/m3 DOT: 2047 129 

Synonyms/Trade Names: 3-Chloroallyl chloride; DCP; 1,3-Dichloro-1-propene; 1,3-Dichloropropylene; Telone® 

Exposure Limits: 

NIOSH REL: Ca 

 TWA 1 ppm (5 mg/m3

) [skin] 

 See Appendix A 

OSHA PEL†: none 

Physical Description: Colorless to straw-colored liquid with a sharp, sweet, irritating, 

chloroform-like odor. [insecticide] [Note: Exists as mixture of cis- & trans-isomers.] 

Measurement Methods 

(see Table 1): 

None available 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Chemical & Physical Properties: 

MW: 111.0 

BP: 226°F 

Sol: 0.2% 

Fl.P: 77°F 

IP: ? 

Sp.Gr: 1.21 

VP: 28 mmHg 

FRZ: -119°F 

UEL: 14.5% 

LEL: 5.3% 

Class IC Flammable Liquid 

Incompatibilities and Reactivities: Aluminum, magnesium, halogens, 

oxidizers [Note: Epichlorohydrin may be added as a stabilizer.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, resp sys; eye, skin burns; lac; head, dizz; in 

animals; liver, kidney damage; [carc] 

TO: Eyes, skin, resp sys, CNS, liver, kidneys [in animals: cancer of the 

bladder, liver, lung & forestomach] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

101
2,2-Dichloropropionic acid Formula: 

CH3CCl2COOH 

CAS#: 

75-99-0 

RTECS#: 

UF0690000 

IDLH: 

N.D. 

Conversion: 1 ppm = 5.85 mg/m3 DOT: 

Synonyms/Trade Names: Dalapon; 2,2-Dichloropropanoic acid; α,α-Dichloropropionic acid 

Exposure Limits: 

NIOSH REL: TWA 1 ppm (6 mg/m3

) 

OSHA PEL†: none 

Physical Description: Colorless liquid with an acrid odor. [herbicide] [Note: A white 

to tan powder below 46°F. The sodium salt, a white powder, is often used.] 

Measurement Methods 

(see Table 1): 

OSHA PV2017 

Chemical & Physical Properties: 

MW: 143.0 

BP: 374°F 

Sol: 50% 

Fl.P: NA 

IP: ? 

Sp.Gr: 1.40 

VP: ? 

FRZ: 46°F 

UEL: NA 

LEL: NA 

Noncombustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Metals 

[Note: Very corrosive to aluminum & copper alloys. Reacts slowly in water to form hydrochloric & pyruvic acids.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, upper resp sys; skin burns; lass, loss of 

appetite, diarr, vomit, slowing of pulse; CNS depres 

TO: Eyes, skin, resp sys, GI tract, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

D 

Dichlorotetrafluoroethane Formula: 

CClF2CClF2

CAS#: 

76-14-2 

RTECS#: 

KI1101000 

IDLH: 

15,000 ppm 

Conversion: 1 ppm = 6.99 mg/m3 DOT: 1958 126 

Synonyms/Trade Names: 1,2-Dichlorotetrafluoroethane; Freon® 114; Genetron® 114; Halon® 242; 

Refrigerant 114 

Exposure Limits: 

NIOSH REL: TWA 1000 ppm (7000 mg/m3) 

OSHA PEL: TWA 1000 ppm (7000 mg/m3) 

Physical Description: Colorless gas with a faint, ether-like odor at high 

concentrations. [Note: A liquid below 38°F. Shipped as a liquefied compressed gas.] 

Measurement Methods 

(see Table 1): 

NIOSH 1018 

Chemical & Physical Properties: 

MW: 170.9 

BP: 38°F 

Sol: 0.01% 

Fl.P: NA 

IP: 12.20 eV 

RGasD: 5.93 

VP(70°F): 1.9 atm 

FRZ: -137°F 

UEL: NA 

LEL: NA 

Nonflammable Gas 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Frostbite 

Eyes: Frostbite 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Provide: Frostbite wash 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

10,000 ppm: Sa 

15,000 ppm: Sa:Cf/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Chemically-active metals such as sodium, potassium, calcium, powdered 

aluminum, zinc & magnesium; acids; acid fumes 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con (liquid) 

SY: Irrit resp sys; asphy; card arrhy, card arrest; liquid: frostbite 

TO: Resp sys, CVS 

First Aid (see Table 6): 

Eye: Frostbite 

Skin: Frostbite 

Breath: Resp support 

102
Dichlorvos Formula: 

(CH3O)2P(O)OCH=CCl2

CAS#: 

62-73-7 

RTECS#: 

TC0350000 

IDLH: 

100 mg/m3

Conversion: 1 ppm = 9.04 mg/m3 DOT: 2783 152 

Synonyms/Trade Names: DDVP; 2,2-Dichlorovinyl dimethyl phosphate 

Exposure Limits: 

NIOSH REL: TWA 1 mg/m3 [skin] 

OSHA PEL: TWA 1 mg/m3

 [skin] 

Physical Description: Colorless to amber liquid with a mild, chemical odor. 

[Note: Insecticide that may be absorbed on a dry carrier.] 

Measurement Methods 

(see Table 1): 

NIOSH P&CAM295 (II-5) 

OSHA 62 

Chemical & Physical 

Properties: 

MW: 221.0 

BP: Decomposes 

Sol: 0.5% 

Fl.P: >175°F 

IP: ? 

Sp.Gr(77°F): 1.42 

VP: 0.01 mmHg 

FRZ: ? 

UEL: ? 

LEL: ? 

Class III Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

10 mg/m3

: Sa 

25 mg/m3

: Sa:Cf 

50 mg/m3

: SaT:Cf/ScbaF/SaF 

100 mg/m3

: Sa:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Incompatibilities and Reactivities: Strong acids, strong alkalis [Note: Corrosive to iron & mild steel.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin; miosis, ache eyes; rhin; head; chest tight, wheez, lar 

spasm, salv; cyan; anor, nau, vomit, diarr; sweat; musc fasc, para, dizz, 

ataxia; convuls; low BP, card irreg 

TO: Eyes, skin, resp sys, CVS, CNS, blood chol 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

D 

Dicrotophos Formula: 

C8H16NO5P 

CAS#: 

141-66-2 

RTECS#: 

TC3850000 

IDLH: 

N.D. 

Conversion: 1 ppm = 9.70 mg/m3 DOT: 

Synonyms/Trade Names: Bidrin®, Carbicron®, 2-Dimethyl-cis-2-dimethylcarbamoyl-1-methylvinylphosphate 

Exposure Limits: 

NIOSH REL: TWA 0.25 mg/m3

 [skin] 

OSHA PEL†: none 

Physical Description: Yellow-brown liquid with a mild, ester odor. [insecticide] 

Measurement Methods 

(see Table 1): 

NIOSH 5600 

Chemical & Physical Properties: 

MW: 237.2 

BP: 752°F 

Sol: Miscible 

Fl.P: >200°F 

IP: ? 

Sp.Gr(59°F): 1.22 

VP: 0.0001 mmHg 

FRZ: ? 

UEL: ? 

LEL: ? 

Class IIIB Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Provide: Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Metals [Note: Corrosive to cast iron, mild steel, brass & stainless steel.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Head, nau, dizz, anxi, restless, musc twitch, lass, tremor, inco, 

vomit, abdom cramps, diarr; salv, sweat, lac, rhinitis; anor, mal 

TO: CNS, blood chol 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

103
Dicyclopentadiene Formula: 

C10H12

CAS#: 

77-73-6 

RTECS#: 

PC1050000 

IDLH: 

N.D. 

Conversion: 1 ppm = 5.41 mg/m3 DOT: 2048 130 

Synonyms/Trade Names: Bicyclopentadiene; DCPD; 1,3-Dicyclopentadiene dimer; 

3a,4,7,7a-Tetrahydro-4,7-methanoindene [Note: Exists in two stereoisomeric forms.] 

Exposure Limits: 

NIOSH REL: TWA 5 ppm (30 mg/m3

) 

OSHA PEL†: none 

Measurement Methods 

(see Table 1): 

OSHA PV2098 

Physical Description: Colorless, crystalline solid with a disagreeable, camphor-like odor. 

[Note: A liquid above 90°F.] 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Chemical & Physical Properties: 

MW: 132.2 

BP: 342°F 

Sol: 0.02% 

Fl.P(oc): 90°F 

IP: ? 

Sp.Gr: 0.98 (Liquid at 95°F) 

VP: 1.4 mmHg 

FRZ: 90°F 

UEL: 6.3% 

LEL: 0.8% 

Class IC Flammable Liquid 

Combustible Solid 

Incompatibilities and Reactivities: Oxidizers 

[Note: Depolymerizes at boiling point and forms two molecules of 

cyclopentadiene. Must be inhibited and maintained under an inert 

atmosphere to prevent polymerization.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, nose, throat; inco, head; sneez, cough; skin 

blisters; in animals: kidney, lung damage 

TO: Eyes, skin, resp sys, CNS, kidneys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

D 

Dicyclopentadienyl iron Formula: 

(C5H5)2Fe 

CAS#: 

102-54-5 

RTECS#: 

LK0700000 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: bis(Cyclopentadienyl)iron, Ferrocene, Iron dicyclopentadienyl 

Exposure Limits: 

NIOSH REL: TWA 10 mg/m3 (total) 

 TWA 5 mg/m3 (resp) 

OSHA PEL†: TWA 15 mg/m3

 (total) 

 TWA 5 mg/m3 (resp) 

Physical Description: Orange, crystalline solid with a camphor-like odor. 

Measurement Methods 

(see Table 1): 

OSHA ID125G 

Chemical & Physical Properties: 

MW: 186.1 

BP: 480°F 

Sol: Insoluble 

Fl.P: ? 

IP: 6.88 eV 

Sp.Gr: ? 

VP: ? 

MLT: 343°F 

UEL: ? 

LEL: ? 

Combustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Ammonium perchlorate, tetranitromethane, mercury(II) nitrate 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Possible irrit eyes, skin, resp sys; in animals: liver, RBC, 

testicular changes 

TO: Eyes, skin, resp sys, liver, blood, repro sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash 

Breath: Resp support 

Swallow: Medical attention immed 

104
Dieldrin Formula: 

C12H8Cl6O 

CAS#: 

60-57-1 

RTECS#: 

IO1750000 

IDLH: 

Ca [50 mg/m3] 

Conversion: DOT: 2761 151 

Synonyms/Trade Names: HEOD; 

1,2,3,4,10,10-Hexachloro-6,7-epoxy-1,4,4a,5,6,7,8,8a-octahydro-1,4-endo,exo-5,8-dimethanonaphthalene 

Exposure Limits: 

NIOSH REL: Ca 

 TWA 0.25 mg/m3

 [skin] 

 See Appendix A 

OSHA PEL: TWA 0.25 mg/m3

 [skin] 

Measurement Methods 

(see Table 1): 

NIOSH S283 (II-3) 

Physical Description: Colorless to light-tan crystals with a mild, chemical odor. [insecticide] 

Chemical & Physical 

Properties: 

MW: 380.9 

BP: Decomposes 

Sol: 0.02% 

Fl.P: NA 

IP: ? 

Sp.Gr: 1.75 

VP(77°F): 8 x 10-7 mmHg 

MLT: 349°F 

UEL: NA 

LEL: NA 

Noncombustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam/Daily 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, active metals such as sodium, strong acids, phenols 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Head, dizz; nau, vomit, mal, sweat; myoclonic limb jerks; clonic, 

tonic convuls; coma; [carc]; in animals: liver, kidney damage 

TO: CNS, liver, kidneys, skin [in animals: lung, liver, thyroid & adrenal 

gland tumors] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

D 

Diesel exhaust Formula: CAS#: RTECS#: 

HZ1755000 

IDLH: 

Ca [N.D.] 

Conversion: DOT: 

Synonyms/Trade Names: Synonyms vary depending upon the specific diesel exhaust component. 

Exposure Limits: 

NIOSH REL: Ca 

 See Appendix A 

OSHA PEL: none 

Physical Description: Appearance and odor vary depending upon the specific diesel 

exhaust component. 

Measurement Methods 

(see Table 1): 

NIOSH 2560, 5040 

Chemical & Physical 

Properties: 

Properties vary depending upon 

the specific component diesel 

exhaust component. 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Incompatibilities and Reactivities: Varies 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con 

SY: Eye irrit, pulm func changes; [carc] 

TO: Eyes, resp sys [in animals: lung tumors] 

First Aid (see Table 6): 

Breath: Resp support 

105
Diethanolamine Formula: 

(HOCH2CH2)2NH

CAS#: 

111-42-2 

RTECS#: 

KL2975000 

IDLH: 

N.D. 

Conversion: 1 ppm = 4.30 mg/m3 DOT: 

Synonyms/Trade Names: DEA; Di(2-hydroxyethyl)amine; 2,2'-Dihydroxydiethyamine; Diolamine; 

bis(2-Hydroxyethyl)amine; 2,2'-Iminodiethanol 

Exposure Limits: 

NIOSH REL: TWA 3 ppm (15 mg/m3

) 

OSHA PEL†: none 

Physical Description: Colorless crystals or a syrupy, white liquid (above 82°F) with a 

mild, ammonia-like odor. 

Measurement Methods 

(see Table 1): 

NIOSH 3509 

OSHA PV2018 

Chemical & Physical Properties: 

MW: 105.2 

BP: 516°F (Decomposes) 

Sol: 95% 

Fl.P: 279°F 

IP: ? 

Sp.Gr: 1.10 

VP: <0.01 mmHg 

MLT: 82°F 

UEL: 9.8% 

LEL: 1.6% 

Class IIIB Combustible Liquid 

Combustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Oxidizers, strong acids, acid anhydrides, halides 

[Note: Reacts with CO2 in the air. Hygroscopic (i.e., absorbs moisture from the air). Corrosive to copper, zinc, 

and galvanized iron.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, nose, throat; eye burns, corn nec; skin burns; 

lac, cough, sneez 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

D 

Diethylamine Formula: 

(C2H5)2NH 

CAS#: 

109-89-7 

RTECS#: 

HZ8750000 

IDLH: 

200 ppm 

Conversion: 1 ppm = 2.99 mg/m3 DOT: 1154 132 

Synonyms/Trade Names: Diethamine; N,N-Diethylamine; N-Ethylethanamine 

Exposure Limits: 

NIOSH REL: TWA 10 ppm (30 mg/m3

) 

 ST 25 ppm (75 mg/m3

) 

OSHA PEL†: TWA 25 ppm (75 mg/m3

) 

Physical Description: Colorless liquid with a fishy, ammonia-like odor. 

Measurement Methods 

(see Table 1): 

NIOSH 2010 

OSHA 41 

Chemical & Physical 

Properties: 

MW: 73.1 

BP: 132°F 

Sol: Miscible 

Fl.P: -15°F 

IP: 8.01 eV 

Sp.Gr: 0.71 

VP: 192 mmHg 

FRZ: -58°F 

UEL: 10.1% 

LEL: 1.8% 

Class IB Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Provide: Eyewash (>0.5%) 

 Quick drench (liquid) 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

200 ppm: Sa:Cf£/PaprS£/CcrFS/GmFS/ 

 ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFS/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, strong acids, cellulose nitrate 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, resp sys; in animals; myocardial 

degeneration 

TO: Eyes, skin, resp sys, CVS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

106
2-Diethylaminoethanol Formula: 

(C2H5)2NCH2CH2OH 

CAS#: 

100-37-8 

RTECS#: 

KK5075000 

IDLH: 

100 ppm 

Conversion: 1 ppm = 4.79 mg/m3 DOT: 2686 132 

Synonyms/Trade Names: Diethylaminoethanol; 2-Diethylaminoethyl alcohol; N,N-Diethylethanolamine; 

Diethyl-(2-hydroxyethyl)amine; 2-Hydroxytriethylamine 

Exposure Limits: 

NIOSH REL: TWA 10 ppm (50 mg/m3

) [skin] 

OSHA PEL: TWA 10 ppm (50 mg/m3) [skin] 

Physical Description: Colorless liquid with a nauseating, ammonia-like odor. 

Measurement Methods 

(see Table 1): 

NIOSH 2007 

Chemical & Physical 

Properties: 

MW: 117.2 

BP: 325°F 

Sol: Miscible 

Fl.P: 126°F 

IP: ? 

Sp.Gr: 0.89 

VP: 1 mmHg 

FRZ: -94°F 

UEL: 11.7% 

LEL: 6.7% 

Class II Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash (>5%) 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

100 ppm: CcrOv*/GmFOv/PaprOv*/ 

 Sa*/ScbaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, strong acids 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, resp sys; nau, vomit 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

D 

Diethylenetriamine Formula: 

(NH2CH2CH2)2NH 

CAS#: 

111-40-0 

RTECS#: 

IE1225000 

IDLH: 

N.D. 

Conversion: 1 ppm = 4.22 mg/m3 DOT: 2079 154 

Synonyms/Trade Names: N-(2-Aminoethyl)-1,2-ethanediamine; bis(2-Aminoethyl)amine; DETA; 

2,2'-Diaminodiethylamine 

Exposure Limits: 

NIOSH REL: TWA 1 ppm (4 mg/m3

) [skin] 

OSHA PEL†: none 

Physical Description: Colorless to yellow liquid with a strong, ammonia-like odor. 

[Note: Hygroscopic (i.e., absorbs moisture from the air).] 

Measurement Methods 

(see Table 1): 

NIOSH 2540 

OSHA 60 

Chemical & Physical Properties: 

MW: 103.2 

BP: 405°F 

Sol: Miscible 

Fl.P: 208°F 

IP: ? 

Sp.Gr: 0.96 

VP: 0.4 mmHg 

FRZ: -38°F 

UEL: 6.7% 

LEL: 2% 

Class IIIB Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Oxidizers, strong acids, cellulose nitrate 

[Note: May form explosive complexes with silver, cobalt, or chromium compounds. Corrosive to aluminum, 

copper, brass & zinc.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, muc memb, upper resp sys; derm, skin sens; 

eye, skin nec; cough, dysp, pulm sens 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

107
Diethyl ketone Formula: 

CH3CH2COCH2CH3

CAS#: 

96-22-0 

RTECS#: 

SA8050000 

IDLH: 

N.D. 

Conversion: 1 ppm = 3.53 mg/m3 DOT: 1156 127 

Synonyms/Trade Names: DEK, Dimethylacetone, Ethyl ketone, Metacetone, 3-Pentanone, Propione 

Exposure Limits: 

NIOSH REL: TWA 200 ppm (705 mg/m3) 

OSHA PEL†: none 

Physical Description: Colorless liquid with an acetone-like odor. 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical Properties: 

MW: 86.2 

BP: 215°F 

Sol: 5% 

Fl.P(oc): 55°F 

IP: 9.32 eV 

Sp.Gr: 0.81 

VP(77°F): 35 mmHg 

FRZ: -44°F 

UEL: 6.4% 

LEL: 1.6% 

Class IB Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: Prevent eye contact 

Wash skin: Daily 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Strong oxidizers, alkalis, mineral acids, (hydrogen peroxide + nitric acid) 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, muc memb, resp sys; cough, sneez 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash 

Breath: Resp support 

Swallow: Medical attention immed 

D 

Diethyl phthalate Formula: 

C6H4(COOC2H5)2

CAS#: 

84-66-2 

RTECS#: 

TI1050000 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: DEP, Diethyl ester of phthalic acid, Ethyl phthalate 

Exposure Limits: 

NIOSH REL: TWA 5 mg/m3

OSHA PEL†: none 

Physical Description: Colorless to water-white, oily liquid with a very slight, aromatic 

odor. [pesticide] 

Measurement Methods 

(see Table 1): 

OSHA 104 

Chemical & Physical Properties: 

MW: 222.3 

BP: 563°F 

Sol(77°F): 0.1% 

Fl.P(oc): 322°F 

IP: ? 

Sp.Gr: 1.12 

VP(77°F): 0.002 mmHg 

FRZ: -41°F 

UEL: ? 

LEL(368°F): 0.7% 

Class IIIB Combustible Liquid; however, 

ignition is difficult. 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Strong oxidizers, strong acids, nitric acid, permanganates, water 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, nose, throat; head, dizz, nau; lac; possible 

polyneur, vestibular dysfunc; pain, numb, lass, spasms in arms & legs; 

in animals: possible repro effects 

TO: Eyes, skin, resp sys, CNS, PNS, repro sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Wash regularly 

Breath: Resp support 

Swallow: Medical attention immed 

108
Difluorodibromomethane Formula: 

CBr2F2

CAS#: 

75-61-6 

RTECS#: 

PA7525000 

IDLH: 

2000 ppm 

Conversion: 1 ppm = 8.58 mg/m3 DOT: 1941 171 

Synonyms/Trade Names: Dibromodifluoromethane, Freon® 12B2, Halon® 1202 

Exposure Limits: 

NIOSH REL: TWA 100 ppm (860 mg/m3) 

OSHA PEL: TWA 100 ppm (860 mg/m3

) 

Physical Description: Colorless, heavy liquid or gas (above 76°F) with a 

characteristic odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1012 

OSHA 7 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: N.R. 

Remove: When wet or contam 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

1000 ppm: Sa 

2000 ppm: Sa:Cf/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Chemical & Physical 

Properties: 

MW: 209.8 

BP: 76°F 

Sol: Insoluble 

Fl.P: NA 

IP: 11.07 eV 

Sp.Gr(59°F): 2.29 

VP: 620 mmHg 

FRZ: -231°F 

UEL: NA 

LEL: NA 

Noncombustible Liquid 

Nonflammable Gas 

Incompatibilities and Reactivities: Chemically-active metals such as sodium, 

potassium, calcium, powdered aluminum, zinc & magnesium 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: In animals: irrit resp sys; CNS symptoms; liver damage 

TO: Resp sys, CNS, liver 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

D 

Diglycidyl ether Formula: 

C6H10O3

CAS#: 

2238-07-5 

RTECS#: 

KN2350000 

IDLH: 

Ca [10 ppm] 

Conversion: 1 ppm = 5.33 mg/m3 DOT: 

Synonyms/Trade Names: Diallyl ether dioxide; DGE; Di(2,3-epoxypropyl) ether; 2-Epoxypropyl ether; 

bis(2,3-Epoxypropyl) ether 

Exposure Limits: 

NIOSH REL: Ca 

 TWA 0.1 ppm (0.5 mg/m3

) 

 See Appendix A 

OSHA PEL†: C 0.5 ppm (2.8 mg/m3) 

Physical Description: Colorless liquid with a strong, irritating odor. 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical 

Properties: 

MW: 130.2 

BP: 500°F 

Sol: ? 

Fl.P: 147°F 

IP: ? 

Sp.Gr: 1.12 

VP(77°F): 0.09 mmHg 

FRZ: ? 

UEL: ? 

LEL: ? 

Class IIIA Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam/Daily 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, resp sys; skin burns; in animals: hemato sys, 

lung, liver, kidney damage; repro effects; [carc] 

TO: Eyes, skin, resp sys, repro sys [in animals: skin tumors] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

109
Diisobutyl ketone Formula: 

[(CH3)2CHCH2]2CO 

CAS#: 

108-83-8 

RTECS#: 

MJ5775000 

IDLH: 

500 ppm 

Conversion: 1 ppm = 5.82 mg/m3 DOT: 1157 128 

Synonyms/Trade Names: DIBK; sym-Diisopropyl acetone; 2,6-Dimethyl-4-heptanone; Isovalerone; Valerone 

Exposure Limits: 

NIOSH REL: TWA 25 ppm (150 mg/m3) 

OSHA PEL†: TWA 50 ppm (290 mg/m3

) 

Physical Description: Colorless liquid with a mild, sweet odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1300, 2555 

OSHA 7 

Chemical & Physical 

Properties: 

MW: 142.3 

BP: 334°F 

Sol: 0.05% 

Fl.P: 120°F 

IP: 9.04 eV 

Sp.Gr: 0.81 

VP: 2 mmHg 

FRZ: -43°F 

UEL(200°F): 7.1% 

LEL(200°F): 0.8% 

Class II Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: N.R. 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

500 ppm: Sa:Cf£/PaprOv£/CcrFOv/ 

 GmFOv/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, nose, throat; head, dizz; derm; liver, kidney damage 

TO: Eyes, skin, resp sys, CNS, liver, kidneys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 

D 

Diisopropylamine Formula: 

[(CH3)2CH]2NH 

CAS#: 

108-18-9 

RTECS#: 

IM4025000 

IDLH: 

200 ppm 

Conversion: 1 ppm = 4.14 mg/m3 DOT: 1158 132 

Synonyms/Trade Names: DIPA, N-(1-Methylethyl)-2-propanamine 

Exposure Limits: 

NIOSH REL: TWA 5 ppm (20 mg/m3

) [skin] 

OSHA PEL: TWA 5 ppm (20 mg/m3

) [skin] 

Physical Description: Colorless liquid with an ammonia- or fish-like odor. 

Measurement Methods 

(see Table 1): 

NIOSH S141 (II-4) 

Chemical & Physical 

Properties: 

MW: 101.2 

BP: 183°F 

Sol: Miscible 

Fl.P: 20°F 

IP: 7.73 eV 

Sp.Gr: 0.72 

VP: 70 mmHg 

FRZ: -141°F 

UEL: 7.1% 

LEL: 1.1% 

Class IB Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact (>5%) 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Provide: Eyewash (>5%) 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

125 ppm: Sa:Cf£/PaprOv£ 

200 ppm: CcrFOv/GmFOv/PaprTOv£/ 

 ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, strong acids 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, resp sys; nau, vomit; head; vis dist 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

110
Dimethyl acetamide Formula: 

CH3CON(CH3)2

CAS#: 

127-19-5 

RTECS#: 

AB7700000 

IDLH: 

300 ppm 

Conversion: 1 ppm = 3.56 mg/m3 DOT: 

Synonyms/Trade Names: N,N-Dimethyl acetamide; DMAC 

Exposure Limits: 

NIOSH REL: TWA 10 ppm (35 mg/m3) [skin] 

OSHA PEL: TWA 10 ppm (35 mg/m3

) [skin] 

Physical Description: Colorless liquid with a weak, ammonia- or fish-like odor. 

Measurement Methods 

(see Table 1): 

NIOSH 2004 

Chemical & Physical 

Properties: 

MW: 87.1 

BP: 329°F 

Sol: Miscible 

Fl.P(oc): 158°F 

IP: 8.81 eV 

Sp.Gr: 0.94 

VP: 2 mmHg 

FRZ: -4°F 

UEL(320°F): 11.5% 

LEL(212°F): 1.8% 

Class IIIA Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

100 ppm: Sa 

250 ppm: Sa:Cf 

300 ppm: ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Carbon tetrachloride, other halogenated compounds when in contact with 

iron, oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit skin; jaun, liver damage; depres, drow, halu, delusions 

TO: Skin, liver, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

D 

Dimethylamine Formula: 

(CH3)2NH 

CAS#: 

124-40-3 

RTECS#: 

IP8750000 

IDLH: 

500 ppm 

Conversion: 1 ppm = 1.85 mg/m3 DOT: 1032 118 (anhydrous); 1160 132 (solution) 

Synonyms/Trade Names: Dimethylamine (anhydrous), N-Methylmethanamine 

Exposure Limits: 

NIOSH REL: TWA 10 ppm (18 mg/m3

) 

OSHA PEL: TWA 10 ppm (18 mg/m3

) 

Physical Description: Colorless gas with an ammonia- or fish-like odor. 

[Note: A liquid below 44°F. Shipped as a liquefied compressed gas.] 

Measurement Methods 

(see Table 1): 

NIOSH 2010 

OSHA 34 

Chemical & Physical 

Properties: 

MW: 45.1 

BP: 44°F 

Sol(140°F): 24% 

Fl.P: NA (Gas) 20°F (Liquid) 

IP: 8.24 eV 

RGasD: 1.56 

Sp.Gr: 0.67 (Liquid at 44°F) 

VP: 1.7 atm 

FRZ: -134°F 

UEL: 14.4% 

LEL: 2.8% 

Flammable Gas 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact (liquid) 

 Frostbite 

Eyes: Prevent eye contact (liquid) 

 Frostbite 

Wash skin: When contam (liquid) 

Remove: When wet (flamm) 

Change: N.R. 

Provide: Eyewash (liquid) 

 Quick drench (liquid) 

 Frostbite wash 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

250 ppm: Sa:Cf£ 

500 ppm: ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFS/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, chlorine, mercury, acraldehyde, fluorides, maleic anhydride, 

aluminum, brass, copper, zinc 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con (liquid) 

SY: Irrit nose, throat; sneez, cough, dysp; pulm edema; conj; 

derm; liquid: frostbite 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed (liquid)/Frostbite 

Skin: Water flush immed (liquid)/Frostbite 

Breath: Resp support 

111
D 

4-Dimethylaminoazobenzene Formula: 

C6H5NNC6H4N(CH3)2

CAS#: 

60-11-7 

RTECS#: 

BX7350000 

IDLH: 

Ca [N.D.] 

Conversion: DOT: 

Synonyms/Trade Names: Butter yellow; DAB; p-Dimethylaminoazobenzene; N,N-Dimethyl-4-aminoazobenzene; 

Methyl yellow 

Exposure Limits: 

NIOSH REL: Ca 

 See Appendix A 

OSHA PEL: [1910.1015] See Appendix B 

Physical Description: Yellow, leaf-shaped crystals. 

Measurement Methods 

(see Table 1): 

NIOSH P&CAM284 (II-4) 

Chemical & Physical 

Properties: 

MW: 225.3 

BP: Sublimes 

Sol: 0.001% 

Fl.P: ? 

IP: ? 

Sp.Gr: ? 

VP: 0.0000003 mmHg (est.) 

MLT: 237°F 

UEL: ? 

LEL: ? 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam/Daily 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

See Appendix E (page 351) 

Incompatibilities and Reactivities: None reported 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Enlarged liver; liver, kidney dist; contact derm; cough, wheez, dysp; 

bloody sputum; bronchial secretions; frequent urination, hema, dysuria; [carc]

TO: Skin, resp sys, liver, kidneys, bladder [in animals: liver & bladder tumors]

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

bis(2-(Dimethylamino)ethyl)ether Formula: 

C8H20N2O 

CAS#: 

3033-62-3 

RTECS#: 

KR9460000 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: NIAX® A99; NIAX® Catalyst A1; 2,2'-Oxybis(N,N-dimethyl ethylamine) 

[Note: A component (5%) of NIAX® Catalyst ESN, along with dimethylaminopropionitrile (95%).] 

Exposure Limits: 

NIOSH REL: See Appendix C (NIAX® Catalyst ESN) 

OSHA PEL: See Appendix C (NIAX® Catalyst ESN) 

Physical Description: Liquid. 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical 

Properties: 

MW: 160.3 

BP: 372°F 

Sol: ? 

Fl.P: ? 

IP: ? 

Sp.Gr: ? 

VP: ? 

FRZ: ? 

UEL: ? 

LEL: ? 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: None reported 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Possible urinary dist, neurological disorders; in animals: irrit eyes, skin 

TO: Eyes, skin, urinary tract, PNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

112
Dimethylaminopropionitrile Formula: 

(CH3)2NCH2CH2CN 

CAS#: 

1738-25-6 

RTECS#: 

UG1575000 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: 3-(Dimethylamino)propionitrile; N,N-Dimethylamino-3-propionitrile 

[Note: A component (95%) of NIAX® Catalyst ESN, along with bis(2-(dimethylamino)ethyl) ether (5%).] 

Exposure Limits: 

NIOSH REL: See Appendix C (NIAX® Catalyst ESN) 

OSHA PEL: See Appendix C (NIAX® Catalyst ESN) 

Physical Description: Colorless liquid. 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical 

Properties: 

MW: 98.2 

BP: 342°F 

Sol: Miscible 

Fl.P: 147°F 

IP: ? 

Sp.Gr(86°F): 0.86 

VP(135°F): 10 mmHg 

FRZ: -48°F 

UEL: ? 

LEL: ? 

Class IIIA Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Oxidizers 

[Note: Emits toxic oxides of nitrogen and cyanide fumes when heated to decomposition.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin; urinary dist; neurological disorders; pins & needles 

in hands & feet; musc weak, lass, nau, vomit; decr nerve conduction in 

lower legs 

TO: Eyes, skin, CNS, urinary tract 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

D 

N,N-Dimethylaniline Formula: 

C6H5N(CH3)2

CAS#: 

121-69-7 

RTECS#: 

BX4725000 

IDLH: 

100 ppm 

Conversion: 1 ppm = 4.96 mg/m3 DOT: 2253 153 

Synonyms/Trade Names: N,N-Dimethylbenzeneamine; N,N-Dimethylphenylamine 

[Note: Also known as Dimethylaniline which is a correct synonym for Xylidine.] 

Exposure Limits: 

NIOSH REL: TWA 5 ppm (25 mg/m3

) 

 ST 10 ppm (50 mg/m3

) [skin] 

OSHA PEL†: TWA 5 ppm (25 mg/m3

) [skin] 

Measurement Methods 

(see Table 1): 

NIOSH 2002 

OSHA PV2064 

Physical Description: Pale yellow, oily liquid with an amine-like odor. [Note: A solid below 36°F.] 

Chemical & Physical 

Properties: 

MW: 121.2 

BP: 378°F 

Sol: 2% 

Fl.P: 142°F 

IP: 7.14 eV 

Sp.Gr: 0.96 

VP: 1 mmHg 

FRZ: 36°F 

UEL: ? 

LEL: ? 

Class IIIA Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

50 ppm: Sa 

100 ppm: Sa:Cf/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, strong acids, benzoyl peroxide 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Anoxia symptoms: cyan, lass, dizz, ataxia; methemo 

TO: Blood, kidneys, liver, CVS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

113
Dimethyl carbamoyl chloride Formula: 

(CH3)2NCOCl 

CAS#: 

79-44-7 

RTECS#: 

FD4200000 

IDLH: 

Ca [N.D.] 

Conversion: DOT: 2262 156 

Synonyms/Trade Names: Chloroformic acid dimethylamide; Dimethylcarbamic chloride; 

N,N-Dimethylcarbamoyl chloride; DMCC 

Exposure Limits: 

NIOSH REL: Ca 

 See Appendix A 

OSHA PEL: none 

Physical Description: Clear, colorless liquid. 

Measurement Methods 

(see Table 1): 

None available 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Chemical & Physical 

Properties: 

MW: 107.6 

BP: 329°F 

Sol: Reacts 

Fl.P: 155°F 

IP: ? 

Sp.Gr: 1.17 

VP: ? 

FRZ: -27°F 

UEL: ? 

LEL: ? 

Class IIIA Combustible Liquid 

Incompatibilities and Reactivities: Acids, water 

[Note: Rapidly hydrolyzes in water to dimethylamine, carbon dioxide, and 

hydrogen chloride.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, nose, throat, resp sys; eye, skin burns; 

cough, wheez, larnygitis, dysp; head, nau, vomit; liver inj; [carc] 

TO: Eyes, skin, resp sys, liver [in animals: nasal cancer] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

D 

Dimethyl-1,2-dibromo-2,2-

dichlorethyl phosphate 

Formula: 

(CH3O)2P(O)OCHBrCBrCl2

CAS#: 

300-76-5 

RTECS#: 

TB9450000 

IDLH: 

200 mg/m3

Conversion: DOT: 

Synonyms/Trade Names: Dibrom®; 1,2-Dibromo-2,2-dichloroethyl dimethyl phosphate; Naled 

Exposure Limits: 

NIOSH REL: TWA 3 mg/m3

 [skin] 

OSHA PEL†: TWA 3 mg/m3

Physical Description: Colorless to white solid or straw-colored liquid (above 80°F) 

with a slightly pungent odor. [insecticide] 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical 

Properties: 

MW: 380.8 

BP: Decomposes 

Sol: Insoluble 

Fl.P: NA 

IP: ? 

Sp.Gr(77°F): 1.96 

VP: 0.0002 mmHg 

MLT: 80°F 

UEL: NA 

LEL: NA 

Noncombustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

30 mg/m3

: 95XQ/Sa 

75 mg/m3: Sa:Cf/PaprHie 

150 mg/m3

: 100F/SaT:Cf/PaprTHie/ 

 ScbaF/SaF 

200 mg/m3

: Sa:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, acids, sunlight, water 

[Note: Corrosive to metals. Hydrolyzed in presence of water.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin; miosis, lac; head; chest tight, wheez, lar 

spasm; salv; cyan; anor, nau, vomit, abdom cramp, diarr; lass, 

twitch, para; dizz, ataxia, convuls; low BP; card irreg 

TO: Eyes, skin, resp sys, CNS, CVS, blood chol 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

114
Dimethylformamide Formula: 

HCON(CH3)2

CAS#: 

68-12-2 

RTECS#: 

LQ2100000 

IDLH: 

500 ppm 

Conversion: 1 ppm = 2.99 mg/m3 DOT: 2265 129 

Synonyms/Trade Names: Dimethyl formamide; N,N-Dimethylformamide; DMF 

Exposure Limits: 

NIOSH REL: TWA 10 ppm (30 mg/m3) [skin] 

OSHA PEL: TWA 10 ppm (30 mg/m3

) [skin] 

Physical Description: Colorless to pale-yellow liquid with a faint, amine-like odor. 

Measurement Methods 

(see Table 1): 

NIOSH 2004 

OSHA 66 

Chemical & Physical Properties: 

MW: 73.1 

BP: 307°F 

Sol: Miscible 

Fl.P: 136°F 

IP: 9.12 eV 

Sp.Gr: 0.95 

VP: 3 mmHg 

FRZ: -78°F 

UEL: 15.2% 

LEL(212°F): 2.2% 

Class II Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

100 ppm: Sa* 

250 ppm: Sa:Cf* 

500 ppm: SaT:Cf*/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Carbon tetrachloride; other halogenated compounds when in contact with iron; 

strong oxidizers; alkyl aluminums; inorganic nitrates 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, resp sys; nau, vomit, colic; liver damage, enlarged 

liver; high BP; face flush; derm; in animals: kidney, heart damage 

TO: Eyes, skin, resp sys, liver, kidneys, CVS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush prompt 

Breath: Resp support 

Swallow: Medical attention immed 

D 

1,1-Dimethylhydrazine Formula: 

(CH3)2NNH2

CAS#: 

57-14-7 

RTECS#: 

MV2450000 

IDLH: 

Ca [15 ppm] 

Conversion: 1 ppm = 2.46 mg/m3 DOT: 1163 131 

Synonyms/Trade Names: Dimazine, DMH, UDMH, Unsymmetrical dimethylhydrazine 

Exposure Limits: 

NIOSH REL: Ca 

 C 0.06 ppm (0.15 mg/m3

) [2-hr] 

 See Appendix A 

OSHA PEL: TWA 0.5 ppm (1 mg/m3

) [skin] 

Physical Description: Colorless liquid with an ammonia- or fish-like odor. 

Measurement Methods 

(see Table 1): 

NIOSH 3515 

Chemical & Physical 

Properties: 

MW: 60.1 

BP: 147°F 

Sol: Miscible 

Fl.P: 5°F 

IP: 8.05 eV 

Sp.Gr: 0.79 

VP: 103 mmHg 

FRZ: -72°F 

UEL: 95% 

LEL: 2% 

Class IB Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFS/ScbaE 

Incompatibilities and Reactivities: Oxidizers, halogens, metallic mercury, fuming nitric acid, hydrogen peroxide 

[Note: May ignite SPONTANEOUSLY in contact with oxidizers.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin; choking, chest pain, dysp; drow; nau; anoxia; 

convuls; liver inj; [carc] 

TO: CNS, liver, GI tract, blood, resp sys, eyes, skin [in animals: tumors 

of the lungs, liver, blood vessels & intestines] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

115
Dimethylphthalate Formula: 

C6H4(COOCH3)2

CAS#: 

131-11-3 

RTECS#: 

TI1575000 

IDLH: 

2000 mg/m3

Conversion: DOT: 

Synonyms/Trade Names: Dimethyl ester of 1,2-benzenedicarboxylic acid; DMP 

Exposure Limits: 

NIOSH REL: TWA 5 mg/m3

OSHA PEL: TWA 5 mg/m3

Physical Description: Colorless, oily liquid with a slight, aromatic odor. 

[Note: A solid below 42°F.] 

Measurement Methods 

(see Table 1): 

OSHA 104 

Chemical & Physical Properties: 

MW: 194.2 

BP: 543°F 

Sol: 0.4% 

Fl.P: 295°F 

IP: 9.64 eV 

Sp.Gr: 1.19 

VP: 0.01 mmHg 

FRZ: 42°F 

UEL: ? 

LEL(358°F): 0.9% 

Class IIIB Combustible Liquid; 

however, ignition is difficult. 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: Prevent eye contact 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

50 mg/m3

: 95F 

125 mg/m3

: Sa:Cf£/PaprHie£ 

250 mg/m3

: 100F/ScbaF/SaF 

2000 mg/m3

: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Incompatibilities and Reactivities: Nitrates; strong oxidizers, alkalis & acids 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, upper resp sys; stomach pain 

TO: Eyes, resp sys, GI tract 

First Aid (see Table 6): 

Eye: Irr prompt 

Skin: Wash regularly 

Breath: Resp support 

Swallow: Medical attention immed 

D 

Dimethyl sulfate Formula: 

(CH3)2SO4

CAS#: 

77-78-1 

RTECS#: 

WS8225000 

IDLH: 

Ca [7 ppm] 

Conversion: 1 ppm = 5.16 mg/m3 DOT: 1595 156 

Synonyms/Trade Names: Dimethyl ester of sulfuric acid, Dimethylsulfate, Methyl sulfate 

Exposure Limits: 

NIOSH REL: Ca 

 TWA 0.1 ppm (0.5 mg/m3

) [skin] 

 See Appendix A 

OSHA PEL†: TWA 1 ppm (5 mg/m3

) [skin] 

Physical Description: Colorless, oily liquid with a faint, onion-like odor. 

Measurement Methods 

(see Table 1): 

NIOSH 2524 

Chemical & Physical Properties: 

MW: 126.1 

BP: 370°F (Decomposes) 

Sol(64°F): 3% 

Fl.P: 182°F 

IP: ? 

Sp.Gr: 1.33 

VP: 0.1 mmHg 

FRZ: -25°F 

UEL: ? 

LEL: ? 

Class IIIA Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFS/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, ammonia solutions 

[Note: Decomposes in water to sulfuric acid; corrosive to metals.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, nose; head; dizz; conj; photo; periorb edema; dysphonia, 

aphonia, dysphagia, productive cough; chest pain; dysp, cyan; vomit, diarr; 

dysuria; analgesia; fever; prot, hema; eye, skin burns; delirium; [carc] 

TO: Eyes, skin, resp sys, liver, kidneys, CNS [in animals: nasal & lung 

cancer] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

116
Dinitolmide Formula: 

(NO2)2C6H2(CH3)CONH2

CAS#: 

148-01-6 

RTECS#: 

XS4200000 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: 3,5-Dinitro-o-toluamide; 2-Methyl-3,5-dinitrobenzamide; Zoalene 

Exposure Limits: 

NIOSH REL: TWA 5 mg/m3

OSHA PEL†: none 

Physical Description: Yellowish, crystalline solid. 

Measurement Methods 

(see Table 1): 

NIOSH 0500 

Chemical & Physical Properties: 

MW: 225.2 

BP: ? 

Sol: Slight 

Fl.P: NA 

IP: ? 

Sp.Gr: ? 

VP: ? 

MLT: 351°F 

UEL: NA 

LEL: NA 

Noncombustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: None reported 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Contact eczema; in animals: methemo, liver changes 

TO: Skin, liver, blood 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

D 

m-Dinitrobenzene Formula: 

C6H4(NO2)2

CAS#: 

99-65-0 

RTECS#: 

CZ7350000 

IDLH: 

50 mg/m3

Conversion: DOT: 1597 152 

Synonyms/Trade Names: meta-Dinitrobenzene; 1,3-Dinitrobenzene 

Exposure Limits: 

NIOSH REL: TWA 1 mg/m3 [skin] 

OSHA PEL: TWA 1 mg/m3

 [skin] 

Physical Description: Pale-white or yellow solid. 

Measurement Methods 

(see Table 1): 

NIOSH S214 (II-4) 

Chemical & Physical 

Properties: 

MW: 168.1 

BP: 572°F 

Sol: 0.02% 

Fl.P: 302°F 

IP: 10.43 eV 

Sp.Gr: 1.58 

VP: ? 

MLT: 192°F 

UEL: ? 

LEL: ? 

Combustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Provide: Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

5 mg/m3

: Qm 

10 mg/m3

: 95XQ/Sa 

25 mg/m3

: Sa:Cf/PaprHie 

50 mg/m3

: 100F/SaT:Cf/PaprTHie/ 

 ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, caustics, metals such as tin & zinc 

[Note: Prolonged exposure to fire and heat may result in an explosion due to SPONTANEOUS decomposition.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Anoxia, cyan; vis dist, central scotomas; bad taste, burning mouth, 

dry throat, thirst; yellowing hair, eyes, skin; anemia; liver damage 

TO: Eyes, skin, blood, liver, CVS, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

117
o-Dinitrobenzene Formula: 

C6H4(NO2)2

CAS#: 

528-29-0 

RTECS#: 

CZ7450000 

IDLH: 

50 mg/m3

Conversion: DOT: 1597 152 

Synonyms/Trade Names: ortho-Dinitrobenzene; 1,2-Dinitrobenzene 

Exposure Limits: 

NIOSH REL: TWA 1 mg/m3 [skin] 

OSHA PEL: TWA 1 mg/m3

 [skin] 

Physical Description: Pale-white or yellow solid. 

Measurement Methods 

(see Table 1): 

NIOSH S214 (II-4) 

Chemical & Physical 

Properties: 

MW: 168.1 

BP: 606°F 

Sol: 0.05% 

Fl.P: 302°F 

IP: 10.71 eV 

Sp.Gr: 1.57 

VP: ? 

MLT: 244°F 

UEL: ? 

LEL: ? 

Combustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Provide: Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

5 mg/m3

: Qm 

10 mg/m3: 95XQ/Sa 

25 mg/m3

: Sa:Cf/PaprHie 

50 mg/m3

: 100F/SaT:Cf/PaprTHie/ 

 ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, caustics, metals such as tin & zinc 

[Note: Prolonged exposure to fire and heat may result in an explosion due to SPONTANEOUS decomposition.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Anoxia, cyan; vis dist, central scotomas; bad taste, burning mouth, 

dry throat, thirst; yellowing hair, eyes, skin; anemia; liver damage 

TO: Eyes, skin, blood, liver, CVS, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

D 

p-Dinitrobenzene Formula: 

C6H4(NO2)2

CAS#: 

100-25-4 

RTECS#: 

CZ7525000 

IDLH: 

50 mg/m3

Conversion: DOT: 1597 152 

Synonyms/Trade Names: para-Dinitrobenzene; 1,4-Dinitrobenzene 

Exposure Limits: 

NIOSH REL: TWA 1 mg/m3

 [skin] 

OSHA PEL: TWA 1 mg/m3

 [skin] 

Physical Description: Pale-white or yellow solid. 

Measurement Methods 

(see Table 1): 

NIOSH S214 (II-4) 

Chemical & Physical 

Properties: 

MW: 168.1 

BP: 570°F 

Sol: 0.01% 

Fl.P: ? 

IP: 10.50 eV 

Sp.Gr: 1.63 

VP: ? 

MLT: 343°F 

UEL: ? 

LEL: ? 

Combustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Provide: Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

5 mg/m3

: Qm 

10 mg/m3

: 95XQ/Sa 

25 mg/m3: Sa:Cf/PaprHie 

50 mg/m3

: 100F/SaT:Cf/PaprTHie/ 

 ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, caustics, metals such as tin & zinc 

[Note: Prolonged exposure to fire and heat may result in an explosion due to SPONTANEOUS decomposition.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Anoxia, cyan; vis dist, central scotomas; bad taste, burning mouth, dry 

throat, thirst; yellowing hair, eyes, skin; anemia; liver damage 

TO: Eyes, skin, blood, liver, CVS, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

118
Dinitro-o-cresol Formula: 

CH3C6H2OH(NO2)2

CAS#: 

534-52-1 

RTECS#: 

GO9625000 

IDLH: 

5 mg/m3

Conversion: DOT: 1598 153 

Synonyms/Trade Names: 4,6-Dinitro-o-cresol; 3,5-Dinitro-2-hydroxytoluene; 4,6-Dinitro-2-methyl phenol; 

DNC; DNOC 

Exposure Limits: 

NIOSH REL: TWA 0.2 mg/m3

 [skin] 

OSHA PEL: TWA 0.2 mg/m3 [skin] 

Physical Description: Yellow, odorless solid. [insecticide] 

Measurement Methods 

(see Table 1): 

NIOSH S166 (II-5) 

Chemical & Physical Properties: 

MW: 198.1 

BP: 594°F 

Sol: 0.01% 

Fl.P: NA 

IP: ? 

Sp.Gr: 1.1 (estimated) 

VP: 0.00005 mmHg 

MLT: 190°F 

UEL: NA 

LEL: NA 

MEC: 30 g/m3

Noncombustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam/Daily 

Remove: When wet or contam 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

2 mg/m3

: 95F 

5 mg/m3

: 100F/Sa:Cf£/PaprHie£/ 

 ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Sense of well being; head, fever, lass, profuse sweat, 

excess thirst, tacar, hyperpnea, cough, short breath, coma 

TO: CVS, endocrine sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

D 

Dinitrotoluene Formula: 

CH3C6H3(NO2)2

CAS#: 

25321-14-6 

RTECS#: 

XT1300000 

IDLH: 

Ca [50 mg/m3

] 

Conversion: DOT: 1600 152 (molten); 2038 152 (solid) 

Synonyms/Trade Names: Dinitrotoluol, DNT, Methyldinitrobenzene [Note: Various isomers of DNT exist.] 

Exposure Limits: 

NIOSH REL: Ca 

 TWA 1.5 mg/m3

 [skin] 

 See Appendix A 

OSHA PEL: TWA 1.5 mg/m3

 [skin] 

Measurement Methods 

(see Table 1): 

OSHA 44 

Physical Description: Orange-yellow crystalline solid with a characteristic odor. [Note: Often shipped molten.] 

Chemical & Physical Properties: 

MW: 182.2 

BP: 572°F 

Sol: Insoluble 

Fl.P: 404°F 

IP: ? 

Sp.Gr: 1.32 

VP: 1 mmHg 

MLT: 158°F 

UEL: ? 

LEL: ? 

Combustible Solid, but difficult to ignite. 

Personal Protection/Sanitation

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam/Daily 

Remove: When wet or contam 

Change: Daily 

Provide: Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, caustics, metals such as tin & zinc 

[Note: Commercial grades will decompose at 482°F, with self-sustaining decomposition at 536°F.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Anoxia, cyan; anemia, jaun; repro effects; [carc] 

TO: Blood, liver, CVS, repro sys [in animals: liver, skin & kidney tumors] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

119
Di-sec octyl phthalate Formula: 

C24H38O4

CAS#: 

117-81-7 

RTECS#: 

TI0350000 

IDLH: 

Ca [5000 mg/m3

] 

Conversion: DOT: 

Synonyms/Trade Names: DEHP, Di(2-ethylhexyl)phthalate, DOP, bis-(2-Ethylhexyl)phthalate, Octyl phthalate 

Exposure Limits: 

NIOSH REL: Ca D TWA 5 mg/m3

 

 ST 10 mg/m3 

 See Appendix A 

OSHA PEL†: TWA 5 mg/m3

Physical Description: Colorless, oily liquid with a slight odor. 

Measurement Methods 

(see Table 1): 

NIOSH 5020 

Chemical & Physical Properties: 

MW: 390.5 

BP: 727°F 

Sol(75°F): 0.00003% 

Fl.P(oc): 420°F 

IP: ? 

Sp.Gr: 0.99 

VP: <0.01 mmHg 

FRZ: -58°F 

UEL: ? 

LEL(474°F): 0.3% 

Class IIIB Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Incompatibilities and Reactivities: Nitrates; strong oxidizers, acids & alkalis 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, muc memb; in animals: liver damage; terato effects; [carc] 

TO: Eyes, resp sys, CNS, liver, repro sys, GI tract [in animals: liver tumors] 

First Aid (see Table 6): 

Eye: Irr immed 

Breath: Resp support 

Swallow: Medical attention immed 

Dioxane Formula: 

C4H8O2

CAS#: 

123-91-1 

RTECS#: 

JG8225000 

IDLH: 

Ca [500 ppm] 

Conversion: 1 ppm = 3.60 mg/m3 DOT: 1165 127 

Synonyms/Trade Names: Diethylene dioxide; Diethylene ether; Dioxan; p-Dioxane; 1,4-Dioxane 

Exposure Limits: 

NIOSH REL: Ca 

 C 1 ppm (3.6 mg/m3

) [30-minute] 

 See Appendix A 

OSHA PEL†: TWA 100 ppm (360 mg/m3

) [skin] 

Measurement Methods 

(see Table 1): 

NIOSH 1602 

OSHA 7 

Physical Description: Colorless liquid or solid (below 53°F) with a mild, ether-like odor. 

Chemical & Physical Properties: 

MW: 88.1 

BP: 214°F 

Sol: Miscible 

Fl.P: 55°F 

IP: 9.13 eV 

Sp.Gr: 1.03 

VP: 29 mmHg 

FRZ: 53°F 

UEL: 22% 

LEL: 2.0% 

Class IB Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, decaborane, triethynyl aluminum 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, nose, throat; drow, head; nau, vomit; liver damage; 

kidney failure; [carc] 

TO: Eyes, skin, resp sys, liver, kidneys [in animals: lung, liver & nasal 

cavity tumors] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 

120
Dioxathion Formula: 

C4H6O2[SPS(OC2H5)2]2

CAS#: 

78-34-2 

RTECS#: 

TE3350000 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: Delnav®; p-Dioxane-2,3-diyl ethyl phosphorodithioate; Dioxane phosphate; 

2,3-p-Dioxanethiol-S,S-bis(O,O-diethyl phosphoro-dithioate); Navadel® 

Exposure Limits: 

NIOSH REL: TWA 0.2 mg/m3

 [skin] 

OSHA PEL†: none 

Physical Description: Viscous, brown, tan, or dark-amber liquid. [insecticide] 

[Note: Technical product is a mixture of cis- & trans-isomers.] 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical Properties: 

MW: 456.6 

BP: ? 

Sol: Insoluble 

Fl.P: NA 

IP: ? 

Sp.Gr(79°F): 1.26 

VP: ? 

FRZ: -4°F 

UEL: NA 

LEL: NA 

Noncombustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Alkalis, iron or tin surfaces, heat 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin; head, dizz, lass; rhin, chest tight; miosis; nau, 

vomit, abdom cramps, diarr, salv; musc fasc; conf, drow 

TO: Eyes, skin, resp sys, CNS, CVS, blood chol 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

D 

Diphenyl Formula: 

C6H5C6H5

CAS#: 

92-52-4 

RTECS#: 

DU8050000 

IDLH: 

100 mg/m3

Conversion: 1 ppm = 6.31 mg/m3 DOT: 

Synonyms/Trade Names: Biphenyl, Phenyl benzene 

Exposure Limits: 

NIOSH REL: TWA 1 mg/m3

 (0.2 ppm) 

OSHA PEL: TWA 1 mg/m3

 (0.2 ppm) 

Physical Description: Colorless to pale-yellow solid with a pleasant, characteristic 

odor. [fungicide] 

Measurement Methods 

(see Table 1): 

NIOSH 2530 

OSHA PV2022 

Chemical & Physical 

Properties: 

MW: 154.2 

BP: 489°F 

Sol: Insoluble 

Fl.P: 235°F 

IP: 7.95 eV 

Sp.Gr: 1.04 

VP: 0.005 mmHg 

MLT: 156°F 

UEL(311°F): 5.8% 

LEL(232°F): 0.6% 

Combustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash (molt) 

 Quick drench (molt) 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

10 mg/m3

: CcrOv95/Sa 

25 mg/m3: Sa:Cf*/PaprOvHie* 

50 mg/m3

: CcrFOv100/GmFOv100/ 

 PaprTOvHie*/ScbaF/SaF 

100 mg/m3

: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Incompatibilities and Reactivities: Oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, throat; head, nau, lass, numb limbs; liver damage 

TO: Eyes, resp sys, liver, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

121
Diphenylamine Formula: 

(C6H5)2NH 

CAS#: 

122-39-4 

RTECS#: 

JJ7800000 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: Anilinobenzene, DPA, Phenylaniline, N-Phenylaniline, N-Phenylbenzenamine 

[Note: The carcinogen 4-Aminodiphenyl may be present as an impurity in the commercial product.] 

Exposure Limits: 

NIOSH REL: TWA 10 mg/m3

OSHA PEL†: none 

Physical Description: Colorless, tan, amber, or brown crystalline solid with a 

pleasant, floral odor. [fungicide] 

Measurement Methods 

(see Table 1): 

OSHA 22, 78 

Chemical & Physical Properties: 

MW: 169.2 

BP: 576°F 

Sol: 0.03% 

Fl.P: 307°F 

IP: 7.40 eV 

Sp.Gr: 1.16 

VP(227°F): 1 mmHg 

MLT: 127°F 

UEL: ? 

LEL: ? 

Combustible Solid; explosive if a cloud of 

dust is exposed to a source of ignition. 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: Daily 

Remove: When wet or contam 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Oxidizers, hexachloromelamine, trichloromelamine 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, muc memb; eczema; tacar, hypertension; 

cough, sneez; methemo; incr BP, heart rate; prot, hema, bladder 

inj; in animals: terato effects 

TO: Eyes, skin, resp sys, CVS, blood, bladder, repro sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 

D 

Dipropylene glycol methyl ether Formula: 

CH3OC3H6OC3H6OH 

CAS#: 

34590-94-8 

RTECS#: 

JM1575000 

IDLH: 

600 ppm 

Conversion: 1 ppm = 6.06 mg/m3 DOT: 

Synonyms/Trade Names: Dipropylene glycol monomethyl ether, Dowanol® 50B 

Exposure Limits: 

NIOSH REL: TWA 100 ppm (600 mg/m3

) 

 ST 150 ppm (900 mg/m3

) [skin] 

OSHA PEL†: TWA 100 ppm (600 mg/m3

) [skin] 

Physical Description: Colorless liquid with a mild, ether-like odor. 

Measurement Methods 

(see Table 1): 

NIOSH 2554, S69 (II-2) 

Chemical & Physical 

Properties: 

MW: 148.2 

BP: 408°F 

Sol: Miscible 

Fl.P: 180°F 

IP: ? 

Sp.Gr: 0.95 

VP: 0.5 mmHg 

FRZ: -112°F 

UEL: 3.0% 

LEL(392°F): 1.1% 

Class IIIA Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

600 ppm: Sa/ScbaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, nose, throat; lass, dizz, head 

TO: Eyes, resp sys, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 

122
Dipropyl ketone Formula: 

(CH3CH2CH2)2CO 

CAS#: 

123-19-3 

RTECS#: 

MJ5600000 

IDLH: 

N.D. 

Conversion: 1 ppm = 4.67 mg/m3 DOT: 2710 128 

Synonyms/Trade Names: Butyrone, DPK, 4-Heptanone, Heptan-4-one, Propyl ketone 

Exposure Limits: 

NIOSH REL: TWA 50 ppm (235 mg/m3) 

OSHA PEL†: none 

Physical Description: Colorless liquid with a pleasant odor. 

Measurement Methods 

(see Table 1): 

OSHA 7 

Chemical & Physical Properties: 

MW: 114.2 

BP: 291°F 

Sol: Insoluble 

Fl.P: 120°F 

IP: 9.10 eV 

Sp.Gr: 0.82 

VP: 5 mmHg 

FRZ: -27°F 

UEL: ? 

LEL: ? 

Class II Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: Daily 

Remove: When wet or contam 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin; CNS depres, dizz, drow, decr breath; in 

animals: liver inj; narco 

TO: Eyes, skin, CNS, liver 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash 

Breath: Resp support 

Swallow: Medical attention immed 

D 

Diquat (Diquat dibromide) Formula: 

C12H12N2Br2

CAS#: 

85-00-7 

RTECS#: 

JM5690000 

IDLH: 

N.D. 

Conversion: DOT: 2781 151 (solid); 2782 131 (liquid) 

Synonyms/Trade Names: Diquat dibromide; 1,1'-Ethylene-2,2'-bipyridyllium dibromide 

[Note: Diquat is a cation (C12H12N2

++; 1,1'-Ethylene-2,2-bipyridyllium ion). Various diquat salts are 

commercially available.] 

Exposure Limits: 

NIOSH REL: TWA 0.5 mg/m3

OSHA PEL†: none 

Physical Description: Dibromide salt: Yellow crystals. [herbicide] 

[Note: Commercial product may be found in a liquid concentrate or a solution.] 

Measurement Methods 

(see Table 1): 

None available 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Provide: Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Chemical & Physical Properties: 

MW: 344.1 

BP: Decomposes 

Sol: 70% 

Fl.P: ? 

IP: ? 

Sp.Gr: 1.22-1.27 

VP: <0.00001 mmHg 

MLT: 635°F 

UEL: ? 

LEL: ? 

Combustible Solid, but does not readily 

ignite and burns with difficulty. 

Incompatibilities and Reactivities: Alkalis, UV light, basic solutions 

[Note: Concentrated diquat solutions corrode aluminum.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, muc memb, resp sys; rhin, epis; skin burns; 

nau, vomit, diarr, mal; kidney, liver inj; cough, chest pain, dysp, 

pulm edema; tremor, convuls; delayed healing of wounds 

TO: Eyes, skin, resp sys, kidneys, liver, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

123
Disulfiram Formula: 

[(C2H5)2NCS]2S2

CAS#: 

97-77-8 

RTECS#: 

JO1225000 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: Antabuse®, bis(Diethylthiocarbamoyl) disulfide, Ro-Sulfiram®, TETD, 

Tetraethylthiuram disulfide 

Exposure Limits: 

NIOSH REL: TWA 2 mg/m3

 

 [Precautions should be taken to avoid concurrent 

 exposure to ethylene dibromide.] 

OSHA PEL†: none 

Measurement Methods 

(see Table 1): 

None available 

Physical Description: White, yellowish, or light-gray powder with a slight odor. [fungicide] 

Chemical & Physical Properties: 

MW: 296.6 

BP: ? 

Sol: 0.02% 

Fl.P: NA 

IP: ? 

Sp.Gr: 1.30 

VP: ? 

MLT: 158°F 

UEL: NA 

LEL: NA 

Noncombustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: None reported 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, resp sys; sens derm; lass, tremor, restless, 

head, dizz; metallic taste; peri neur; liver damage 

TO: Eyes, skin, resp sys, CNS, PNS, liver 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

D 

Disulfoton Formula: 

C8H19O2PS3

CAS#: 

298-04-4 

RTECS#: 

TD9275000 

IDLH: 

N.D. 

Conversion: DOT: 2783 152 

Synonyms/Trade Names: O,O-Diethyl S-2-(ethylthio)-ethyl phosphorodithioate; Di-Syston®; Thiodemeton 

Exposure Limits: 

NIOSH REL: TWA 0.1 mg/m3

 [skin] 

OSHA PEL†: none 

Physical Description: Oily, colorless to yellow liquid with a characteristic, sulfur odor. 

[insecticide] [Note: Technical product is a brown liquid.] 

Measurement Methods 

(see Table 1): 

NIOSH 5600 

Chemical & Physical Properties: 

MW: 274.4 

BP: ? 

Sol(73°F): 0.003% 

Fl.P: >180°F 

IP: ? 

Sp.Gr: 1.14 

VP: 0.0002 mmHg 

FRZ: >-13°F 

UEL: ? 

LEL: ? 

Combustible Liquid, but will not ignite 

easily. 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Alkalis 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin; nau, vomit, abdom cramps, diarr, salv; head, dizz, 

lass; rhin, chest tight; blurred vision, miosis; card irreg; musc fasc; dysp; 

eye, skin burns 

TO: Eyes, skin, resp sys, CNS, CVS, blood chol 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

124
Diuron Formula: 

C6H3Cl2NHCON(CH3)2

CAS#: 

330-54-1 

RTECS#: 

YS8925000 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: 3-(3,4-Dichlorophenyl)-1,1-dimethylurea; Direx®; Karmex® 

Exposure Limits: 

NIOSH REL: TWA 10 mg/m3

OSHA PEL†: none 

Physical Description: White, odorless, crystalline solid. [herbicide] 

Measurement Methods 

(see Table 1): 

NIOSH 5601 

OSHA PV2097 

Chemical & Physical Properties: 

MW: 233.1 

BP: 356°F (Decomposes) 

Sol: 0.004% 

Fl.P: NA 

IP:? 

Sp.Gr: ? 

VP: 0.000000002 mmHg 

MLT: 316°F 

UEL: NA 

LEL: NA 

Noncombustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: Daily 

Remove: N.R. 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Strong acids 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, nose, throat; in animals: anemia, methemo 

TO: Eyes, skin, resp sys, blood 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

D 

Divinyl benzene Formula: 

C6H4(HC=CH2)2

CAS#: 

1321-74-0 (mixed isomers)

RTECS#: 

CZ9370000 

IDLH: 

N.D. 

Conversion: 1 ppm = 5.33 mg/m3 DOT: 2049 130 

Synonyms/Trade Names: Diethyl benzene, DVB, Vinylstyrene 

[Note: Commercial product contains all 3 isomers, but m-isomer predominates. Usually contains an inhibitor 

to prevent polymerization.] 

Exposure Limits: 

NIOSH REL: TWA 10 ppm (50 mg/m3

) 

OSHA PEL†: none 

Physical Description: Pale, straw-colored liquid. 

Measurement Methods 

(see Table 1): 

OSHA 89 

Chemical & Physical Properties: 

MW: 130.2 

BP: 392°F 

Sol: 0.005% 

Fl.P(oc): 169°F 

IP: ? 

Sp.Gr: 0.93 

VP: 0.7 mmHg 

FRZ: -88°F 

UEL: 6.2% 

LEL: 1.1% 

Class IIIA Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: None reported 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, resp sys; skin burns; in animals: CNS depres 

TO: Eyes, skin, resp sys, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

125
1-Dodecanethiol Formula: 

CH3(CH2)11SH 

CAS#: 

112-55-0 

RTECS#: 

JR3155000 

IDLH: 

N.D. 

Conversion: 1 ppm = 8.28 mg/m3 DOT: 1228 131 

Synonyms/Trade Names: Dodecyl mercaptan, 1-Dodecyl mercaptan, n-Dodecyl mercaptan, Lauryl mercaptan, 

n-Lauryl mercaptan, 1-Mercaptododecane 

Exposure Limits: 

NIOSH REL: C 0.5 ppm (4.1 mg/m3

) [15-minute] 

OSHA PEL: none 

Physical Description: Colorless, water-white, or pale-yellow, oily liquid with a mild, 

skunk-like odor. [Note: A solid below 15°F.] 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical 

Properties: 

MW: 202.4 

BP: 441-478°F 

Sol: Insoluble 

Fl.P(oc): 190°F 

IP: ? 

Sp.Gr: 0.85 

VP(77°F): 3 mmHg 

FRZ: 15°F 

UEL: ? 

LEL: ? 

Class IIIA Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

5 ppm: CcrOv/Sa 

12.5 ppm: Sa:Cf/PaprOv 

25 ppm: CcrFOv/GmFOv/PaprTOv/ 

 ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers & acids, strong bases, reducing agents, alkali metals, 

water, steam 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, resp sys; cough; dizz, dysp, lass, conf, cyan; 

abdom pain, nau; skin sens 

TO: Eyes, skin, resp sys, CNS, blood 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

E 

Emery Formula: 

Al2O3

CAS#: 

1302-74-5 (corundum) 

RTECS#: 

GN2310000 (corundum) 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: Aluminum oxide, Aluminum trioxide, Corundum, Impure corundum, 

Natural aluminum oxide [Note: Emery is an impure variety of Al2O3 which may contain small impurities of iron, 

magnesium & silica Corundum is natural Al2O3.] 

Exposure Limits: 

NIOSH REL: See Appendix D 

OSHA PEL†: TWA 15 mg/m3

 (total) 

 TWA 5 mg/m3 (resp) 

Physical Description: Odorless, white, crystalline powder. 

Measurement Methods 

(see Table 1): 

NIOSH 0500, 0600 

Chemical & Physical 

Properties: 

See α-Alumina for physical & 

chemical properties. 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, resp sys 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Breath: Fresh air 

Swallow: Medical attention immed 

126
Endosulfan Formula: 

C9H6Cl6O3S 

CAS#: 

115-29-7 

RTECS#: 

RB9275000 

IDLH: 

N.D. 

Conversion: DOT: 2761 151 

Synonyms/Trade Names: Benzoepin; Endosulphan; 

6,7,8,9,10-Hexachloro-1,5,5a,6,9,9a-hexachloro-6,9-methano-2,4,3-benzo-dioxathiepin-3-oxide; Thiodan® 

Exposure Limits: 

NIOSH REL: TWA 0.1 mg/m3

 [skin] OSHA PEL†: none 

Physical Description: Brown crystals with a slight, sulfur dioxide odor. [insecticide] 

[Note: Technical product is a tan, waxy, isomer mixture.] 

Measurement Methods 

(see Table 1): 

OSHA PV2023 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Chemical & Physical Properties: 

MW: 406.9 

BP: Decomposes 

Sol: 0.00001% 

Fl.P: NA 

IP: ? 

Sp.Gr: 1.74 

VP(77°F): 0.00001 mmHg 

MLT: 223°F 

UEL: NA 

LEL: NA Noncombustible Solid, but 

may be dissolved in flammable liquids. 

Incompatibilities and Reactivities: Alkalis, acids, water 

[Note: Corrosive to iron. Hydrolyzes slowly on contact with water or 

decomposes in presence of alkalis and acids to form sulfur dioxide.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit skin; nau, conf, agitation, flushing, dry mouth, tremor, 

convuls, head; in animals: kidney, liver inj; decr testis weight 

TO: Skin, CNS, liver, kidneys, repro sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

E 

Endrin Formula: 

C12H8Cl6O 

CAS#: 

72-20-8 

RTECS#: 

IO1575000 

IDLH: 

2 mg/m3

Conversion: DOT: 2761 151 

Synonyms/Trade Names: Hexadrin®, 

1,2,3,4,10,10-Hexachloro-6,7-epoxy-1,4,4a,5,6,7,8,8a-octahydro-1,4-endo,endo-5,8-dimethanonaphthalene 

Exposure Limits: 

NIOSH REL: TWA 0.1 mg/m3

 [skin] 

OSHA PEL: TWA 0.1 mg/m3

 [skin] 

Physical Description: Colorless to tan, crystalline solid with a mild, chemical odor. 

[insecticide] 

Measurement Methods 

(see Table 1): 

NIOSH 5519 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

1 mg/m3

: CcrOv95/Sa 

2 mg/m3

: Sa:Cf/PaprOvHie/ 

 CcrFOv100/GmFOv100/ 

 ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Chemical & Physical 

Properties: 

MW: 380.9 

BP: Decomposes 

Sol: Insoluble 

Fl.P: NA 

IP: ? 

Sp.Gr: 1.70 

VP: Low 

MLT: 392°F (Decomposes) 

UEL: NA 

LEL: NA Noncombustible Solid, 

but may be dissolved in 

flammable liquids. 

Incompatibilities and Reactivities: Strong oxidizers, strong acids, parathion 

[Note: May emit hydrogen chloride & phosgene when heated or burned.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Epilep convuls; stupor, head, dizz; abdom discomfort, nau, vomit; 

insom; aggressiveness, conf; drow, lass; anor; in animals: liver damage

TO: CNS, liver 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

127
Enflurane Formula: 

CHF2OCF2CHClF

CAS#: 

13838-16-9 

RTECS#: 

KN6800000 

IDLH: 

N.D. 

Conversion: 1 ppm = 7.55 mg/m3 DOT: 

Synonyms/Trade Names: 2-Chloro-1-(difluoromethoxy)-1,1,2-trifluoroethane; 

2-Chloro-1,1,2-trifluoroethyl difluoromethyl ether; Ethrane® 

Exposure Limits: 

NIOSH REL*: C 2 ppm (15.1 mg/m3

) [60-minute] 

 [*Note: REL for exposure to waste anesthetic gas.] 

OSHA PEL: none 

Physical Description: Clear, colorless liquid with a mild, sweet odor. 

[inhalation anesthetic] 

Measurement Methods 

(see Table 1): 

OSHA 29, 103 

Chemical & Physical Properties: 

MW: 184.5 

BP: 134°F 

Sol: Low 

Fl.P: NA 

IP: ? 

Sp.Gr(77°F): 1.52 

VP: 175 mmHg 

FRZ: ? 

UEL: NA 

LEL: NA 

Noncombustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: Prevent eye contact 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: None reported 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes; CNS depres, analgesia, anes, convuls, resp depres 

TO: Eyes, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash 

Breath: Resp support 

Swallow: Medical attention immed 

E 

Epichlorohydrin Formula: 

C3H5OCl 

CAS#: 

106-89-8 

RTECS#: 

TX4900000 

IDLH: 

Ca [75 ppm] 

Conversion: 1 ppm = 3.78 mg/m3 DOT: 2023 131P 

Synonyms/Trade Names: 1-Chloro-2,3-epoxypropane; 2-Chloropropylene oxide; γ-Chloropropylene oxide 

Exposure Limits: 

NIOSH REL: Ca 

 See Appendix A 

OSHA PEL†: TWA 5 ppm (19 mg/m3

) [skin] 

Physical Description: Colorless liquid with a slightly irritating, chloroform-like odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1010 

OSHA 7 

Chemical & Physical Properties: 

MW: 92.5 

BP: 242°F 

Sol: 7% 

Fl.P: 93°F 

IP: 10.60 eV 

Sp.Gr: 1.18 

VP: 13 mmHg 

FRZ: -54°F 

UEL: 21.0% 

LEL: 3.8% 

Class IC Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOvAg/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, strong acids, certain salts, caustics, zinc, aluminum, water 

[Note: May polymerize in presence of strong acids and bases, particularly when hot.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin with deep pain; nau, vomit; abdom pain; resp distress, 

cough; cyan; repro effects; [carc] 

TO: Eyes, skin, resp sys, kidneys, liver, repro sys [in animals: nasal cancer] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

128
EPN Formula: 

C14H14O4NSP 

CAS#: 

2104-64-5 

RTECS#: 

TB1925000 

IDLH: 

5 mg/m3

Conversion: DOT: 

Synonyms/Trade Names: Ethyl p-nitrophenyl benzenethionophosphonate, 

O-Ethyl O-(4-nitrophenyl) phenylphosphonothioate 

Exposure Limits: 

NIOSH REL: TWA 0.5 mg/m3

 [skin] 

OSHA PEL: TWA 0.5 mg/m3 [skin] 

Physical Description: Yellow solid with an aromatic odor. [pesticide] 

[Note: A brown liquid above 97°F.] 

Measurement Methods 

(see Table 1): 

NIOSH 5012 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

5 mg/m3

: Sa/ScbaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Chemical & Physical 

Properties: 

MW: 323.3 

BP: ? 

Sol: Insoluble 

Fl.P: NA 

IP: ? 

Sp.Gr(77°F): 1.27 

VP(212°F): 0.0003 mmHg 

MLT: 97°F 

UEL: NA 

LEL: NA 

Noncombustible Solid Incompatibilities and Reactivities: Strong oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin; miosis, lac; rhin; head; chest tight, wheez, lar spasm; 

salv; cyan; anor, nau, abdom cramps, diarr; para, convuls; low BP, card irreg 

TO: Eyes, skin, resp sys, CVS, CNS, blood chol 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

E 

Ethanolamine Formula: 

NH2CH2CH2OH 

CAS#: 

141-43-5 

RTECS#: 

KJ5775000 

IDLH: 

30 ppm 

Conversion: 1 ppm = 2.50 mg/m3 DOT: 2491 153 

Synonyms/Trade Names: 2-Aminoethanol, β-Aminoethyl alcohol, Ethylolamine, 2-Hydroxyethylamine, 

Monoethanolamine 

Exposure Limits: 

NIOSH REL: TWA 3 ppm (8 mg/m3

) 

 ST 6 ppm (15 mg/m3

) 

OSHA PEL†: TWA 3 ppm (6 mg/m3

) 

Measurement Methods 

(see Table 1): 

NIOSH 2007 

Physical Description: Colorless, viscous liquid or solid (below 51°F) with an unpleasant, ammonia-like odor. 

Chemical & Physical 

Properties: 

MW: 61.1 

BP: 339°F 

Sol: Miscible 

Fl.P: 186°F 

IP: 8.96 eV 

Sp.Gr: 1.02 

VP: 0.4 mmHg 

FRZ: 51°F 

UEL: 23.5% 

LEL(284°F): 3.0% 

Class IIIA Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

30 ppm: CcrS*/GmFS/PaprS*/Sa*/ScbaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFS/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, strong acids, iron 

[Note: May attack copper, brass, and rubber.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, resp sys; drow 

TO: Eyes, skin, resp sys, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush prompt 

Breath: Resp support 

Swallow: Medical attention immed 

129
E 

Ethion Formula: 

[(C2H5O)2P(S)S]2CH2

CAS#: 

563-12-2 

RTECS#: 

TE4550000 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: O,O,O',O'-Tetraethyl S,S'-methylene di(phosphorodithioate) 

Exposure Limits: 

NIOSH REL: 0.4 mg/m3 [skin] 

OSHA PEL†: none 

Physical Description: Colorless to amber-colored, odorless liquid. [insecticide] 

[Note: A solid below 10°F. The technical product has a very disagreeable odor.] 

Measurement Methods 

(see Table 1): 

NIOSH 5600 

Chemical & Physical Properties: 

MW: 384.5 

BP: >302°F (Decomposes) 

Sol: 0.0001% 

Fl.P: 349°F 

IP: ? 

Sp.Gr: 1.22 

VP: 0.0000015 mmHg 

FRZ: 10°F 

UEL: ? 

LEL: ? 

Class IIIB Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Acids, alkalis 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin; nau, vomit, abdom cramps, diarr, salv; head, dizz, 

lass; rhin, chest tight; blurred vision, miosis; card irreg; musc fasc; dysp 

TO: Eyes, skin, resp sys, CNS, CVS, blood chol 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

2-Ethoxyethanol Formula: 

C2H5OCH2CH2OH 

CAS#: 

110-80-5 

RTECS#: 

KK8050000 

IDLH: 

500 ppm 

Conversion: 1 ppm = 3.69 mg/m3 DOT: 1171 127 

Synonyms/Trade Names: Cellosolve®, EGEE, Ethylene glycol monoethyl ether 

Exposure Limits: 

NIOSH REL: TWA 0.5 ppm (1.8 mg/m3

) [skin] 

OSHA PEL: TWA 200 ppm (740 mg/m3

) [skin] 

Physical Description: Colorless liquid with a sweet, pleasant, ether-like odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1403 

OSHA 53, 79 

Chemical & Physical 

Properties: 

MW: 90.1 

BP: 275°F 

Sol: Miscible 

Fl.P: 110°F 

IP: ? 

Sp.Gr: 0.93 

VP: 4 mmHg 

FRZ: -130°F 

UEL(200°F): 15.6% 

LEL(200°F): 1.7% 

Class II Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

5 ppm: Sa* 

12.5 ppm: Sa:Cf* 

25 ppm: ScbaF/SaF 

500 ppm: Sa:Pd,Pp* 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: In animals: irrit eyes, resp sys; blood changes; liver, kidney, 

lung damage; repro, terato effects 

TO: Eyes, resp sys, blood, kidneys, liver, repro sys, hemato sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush prompt 

Breath: Resp support 

Swallow: Medical attention immed 

130
2-Ethoxyethyl acetate Formula: 

CH3COOCH2CH2OC2H5

CAS#: 

111-15-9 

RTECS#: 

KK8225000 

IDLH: 

500 ppm 

Conversion: 1 ppm = 5.41 mg/m3 DOT: 1172 129 

Synonyms/Trade Names: Cellosolve® acetate, EGEEA, Ethylene glycol monoethyl ether acetate, 

Glycol monoethyl ether acetate 

Exposure Limits: 

NIOSH REL: TWA 0.5 ppm (2.7 mg/m3

) [skin] 

OSHA PEL: TWA 100 ppm (540 mg/m3) [skin] 

Physical Description: Colorless liquid with a mild odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1450 

OSHA 53 

Chemical & Physical 

Properties: 

MW: 132.2 

BP: 313°F 

Sol: 23% 

Fl.P: 124°F 

IP: ? 

Sp.Gr: 0.98 

VP: 2 mmHg 

FRZ: -79°F 

UEL: ? 

LEL: 1.7% 

Class II Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

5 ppm: CcrOv*/Sa* 

12.5 ppm: Sa:Cf*/PaprOv* 

25 ppm: CcrFOv/GmFOv/PaprTOv*/ 

 ScbaF/SaF 

500 ppm: Sa:Pd,Pp* 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Nitrates; strong oxidizers, alkalis & acids 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, nose; vomit; kidney damage; para; in animals: 

repro, terato effects 

TO: Eyes, resp sys, GI tract, repro sys, hemato sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush prompt 

Breath: Resp support 

Swallow: Medical attention immed 

E 

Ethyl acetate Formula: 

CH3COOC2H5

CAS#: 

141-78-6 

RTECS#: 

AH5425000 

IDLH: 

2000 ppm [10%LEL] 

Conversion: 1 ppm = 3.60 mg/m3 DOT: 1173 129 

Synonyms/Trade Names: Acetic ester, Acetic ether, Ethyl ester of acetic acid, Ethyl ethanoate 

Exposure Limits: 

NIOSH REL: TWA 400 ppm (1400 mg/m3

) 

OSHA PEL: TWA 400 ppm (1400 mg/m3

) 

Physical Description: Colorless liquid with an ether-like, fruity odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1457 

OSHA 7 

Chemical & Physical 

Properties: 

MW: 88.1 

BP: 171°F 

Sol(77°F): 10% 

Fl.P: 24°F 

IP: 10.01 eV 

Sp.Gr: 0.90 

VP: 73 mmHg 

FRZ: -117°F 

UEL: 11.5% 

LEL: 2.0% 

Class IB Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

2000 ppm: Sa:Cf£/PaprOv£/CcrFOv/ 

 GmFOv/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Nitrates; strong oxidizers, alkalis & acids 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, nose, throat; narco; derm 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush prompt 

Breath: Resp support 

Swallow: Medical attention immed 

131
E 

Ethyl acrylate Formula: 

CH2=CHCOOC2H5

CAS#: 

140-88-5 

RTECS#: 

AT0700000 

IDLH: 

Ca [300 ppm] 

Conversion: 1 ppm = 4.09 mg/m3 DOT: 1917 129P (inhibited) 

Synonyms/Trade Names: Ethyl acrylate (inhibited), Ethyl ester of acrylic acid, Ethyl propenoate 

Exposure Limits: 

NIOSH REL: Ca 

 See Appendix A 

OSHA PEL†: TWA 25 ppm (100 mg/m3

) [skin] 

Physical Description: Colorless liquid with an acrid odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1450 

OSHA 92 

Chemical & Physical 

Properties: 

MW: 100.1 

BP: 211°F 

Sol: 2% 

Fl.P: 48°F 

IP: 10.30 eV 

Sp.Gr: 0.92 

VP: 29 mmHg 

FRZ: -96°F 

UEL: 14% 

LEL: 1.4% 

Class IB Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Oxidizers, peroxides, polymerizers, strong alkalis, moisture, chlorosulfonic 

acid [Note: Polymerizes readily unless an inhibitor such as hydroquinone is added.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, resp sys; [carc] 

TO: Eyes, skin, resp sys [in animals: tumors of the forestomach] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

Ethyl alcohol Formula: 

CH3CH2OH 

CAS#: 

64-17-5 

RTECS#: 

KQ6300000 

IDLH: 

3300 ppm [10%LEL]

Conversion: 1 ppm = 1.89 mg/m3 DOT: 1170 127 

Synonyms/Trade Names: Alcohol, Cologne spirit, Ethanol, EtOH, Grain alcohol 

Exposure Limits: 

NIOSH REL: TWA 1000 ppm (1900 mg/m3

) 

OSHA PEL: TWA 1000 ppm (1900 mg/m3

) 

Physical Description: Clear, colorless liquid with a weak, ethereal, vinous odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1400 

OSHA 100 

Chemical & Physical 

Properties: 

MW: 46.1 

BP: 173°F 

Sol: Miscible 

Fl.P: 55°F 

IP: 10.47 eV 

Sp.Gr: 0.79 

VP: 44 mmHg 

FRZ: -173°F 

UEL: 19% 

LEL: 3.3% 

Class IB Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

3300 ppm: Sa/ScbaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, potassium dioxide, bromine pentafluoride, acetyl bromide, 

acetyl chloride, platinum, sodium 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, nose; head, drow, lass, narco; cough; liver 

damage; anemia; repro, terato effects 

TO: Eyes, skin, resp sys, CNS, liver, blood, repro sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush prompt 

Breath: Fresh air 

Swallow: Medical attention immed 

132
Ethylamine Formula: 

CH3CH2NH2

CAS#: 

75-04-7 

RTECS#: 

KH2100000 

IDLH: 

600 ppm 

Conversion: 1 ppm = 1.85 mg/m3 DOT: 1036 118 

Synonyms/Trade Names: Aminoethane, Ethylamine (anhydrous), Monoethylamine 

Exposure Limits: 

NIOSH REL: TWA 10 ppm (18 mg/m3) 

OSHA PEL: TWA 10 ppm (18 mg/m3

) 

Physical Description: Colorless gas or water-white liquid (below 62°F) with an 

ammonia-like odor. [Note: Shipped as a liquefied compressed gas.] 

Measurement Methods 

(see Table 1): 

NIOSH S144 (II-3) 

OSHA 36 

Chemical & Physical 

Properties: 

MW: 45.1 

BP: 62°F 

Sol: Miscible 

Fl.P: 1°F 

IP: 8.86 eV 

RGasD: 1.61 

Sp.Gr: 0.69 (Liquid) 

VP: 874 mmHg 

FRZ: -114°F 

UEL: 14.0% 

LEL: 3.5% 

Flammable Gas 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact (liquid) 

Eyes: Prevent eye contact (liquid) 

Wash skin: When contam (liquid) 

Remove: When wet or contam (liquid) 

Change: N.R. 

Provide: Eyewash (liquid) 

 Quick drench (liquid) 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

250 ppm: Sa:Cf£/PaprS£ 

500 ppm: CcrFS/GmFS/ScbaF/SaF 

600 ppm: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFS/ScbaE 

Incompatibilities and Reactivities: Strong acids; strong oxidizers; copper, tin & zinc in presence of moisture; 

cellulose nitrate; chlorine; hypochlorites 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs (liquid), Ing (liquid), Con (liquid) 

SY: Irrit eyes, skin, resp sys; skin burns, derm 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed (liquid) 

Skin: Water flush immed (liquid) 

Breath: Resp support 

Swallow: Medical attention immed (liquid) 

E 

Ethyl benzene Formula: 

CH3CH2C6H5

CAS#: 

100-41-4 

RTECS#: 

DA0700000 

IDLH: 

800 ppm [10%LEL] 

Conversion: 1 ppm = 4.34 mg/m3 DOT: 1175 130 

Synonyms/Trade Names: Ethylbenzol, Phenylethane 

Exposure Limits: 

NIOSH REL: TWA 100 ppm (435 mg/m3

) 

 ST 125 ppm (545 mg/m3

) 

OSHA PEL†: TWA 100 ppm (435 mg/m3

) 

Physical Description: Colorless liquid with an aromatic odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1501 

OSHA 7, 1002 

Chemical & Physical 

Properties: 

MW: 106.2 

BP: 277°F 

Sol: 0.01% 

Fl.P: 55°F 

IP: 8.76 eV 

Sp.Gr: 0.87 

VP: 7 mmHg 

FRZ: -139°F 

UEL: 6.7% 

LEL: 0.8% 

Class IB Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

800 ppm: CcrOv*/GmFOv/PaprOv*/ 

 Sa*/ScbaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, muc memb; head; derm; narco, coma 

TO: Eyes, skin, resp sys, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush prompt 

Breath: Resp support 

Swallow: Medical attention immed 

133
E 

Ethyl bromide Formula: 

CH3CH2Br 

CAS#: 

74-96-4 

RTECS#: 

KH6475000 

IDLH: 

2000 ppm 

Conversion: 1 ppm = 4.46 mg/m3 DOT: 1891 131 

Synonyms/Trade Names: Bromoethane, Monobromoethane 

Exposure Limits: 

NIOSH REL: See Appendix D 

OSHA PEL†: TWA 200 ppm (890 mg/m3

) 

Physical Description: Colorless to yellow liquid with an ether-like odor. 

[Note: A gas above 101°F.] 

Measurement Methods 

(see Table 1): 

NIOSH 1011 

OSHA 7 

Chemical & Physical 

Properties: 

MW: 109.0 

BP: 101°F 

Sol: 0.9% 

Fl.P: <4°F 

IP: 10.29 eV 

Sp.Gr: 1.46 

VP: 375 mmHg 

FRZ: -182°F 

UEL: 8.0% 

LEL: 6.8% 

Class IB Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

OSHA 

2000 ppm: Sa/ScbaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Chemically-active metals such as sodium, potassium, calcium, powdered 

aluminum, zinc & magnesium 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, resp sys; CNS depres; pulm edema; liver, 

kidney disease; card arrhy, card arrest 

TO: Eyes, skin, resp sys, liver, kidneys, CVS, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap flush prompt 

Breath: Resp support 

Swallow: Medical attention immed 

Ethyl butyl ketone Formula: 

CH3CH2CO[CH2]3CH3

CAS#: 

106-35-4 

RTECS#: 

MJ5250000 

IDLH: 

1000 ppm 

Conversion: 1 ppm = 4.67 mg/m3 DOT: 1224 127 

Synonyms/Trade Names: Butyl ethyl ketone, 3-Heptanone 

Exposure Limits: 

NIOSH REL: TWA 50 ppm (230 mg/m3

) 

OSHA PEL: TWA 50 ppm (230 mg/m3

) 

Physical Description: Colorless liquid with a powerful, fruity odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1301, 2553 

OSHA 7 

Chemical & Physical 

Properties: 

MW: 114.2 

BP: 298°F 

Sol: 1% 

Fl.P(oc): 115°F 

IP: 9.02 eV 

Sp.Gr: 0.82 

VP: 4 mmHg 

FRZ: -38°F 

UEL: ? 

LEL: ? 

Class II Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

500 ppm: CcrOv*/Sa* 

1000 ppm: Sa:Cf*/PaprOv*/CcrFOv/ 

 GmFOv/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Oxidizers, acetaldehyde, perchloric acid 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, muc memb; head, narco, coma; derm 

TO: Eyes, skin, resp sys, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush 

Breath: Resp support 

Swallow: Medical attention immed 

134
Ethyl chloride Formula: 

CH3CH2Cl 

CAS#: 

75-00-3 

RTECS#: 

KH7525000 

IDLH: 

3800 ppm [10%LEL] 

Conversion: 1 ppm = 2.64 mg/m3 DOT: 1037 115 

Synonyms/Trade Names: Chloroethane, Hydrochloric ether, Monochloroethane, Muriatic ether 

Exposure Limits: 

NIOSH REL: Handle with caution in the workplace. 

 See Appendix C (Chloroethanes) 

OSHA PEL: TWA 1000 ppm (2600 mg/m3

) 

Measurement Methods 

(see Table 1): 

NIOSH 2519 

Physical Description: Colorless gas or liquid (below 54°F) with a pungent, ether-like odor. 

[Note: Shipped as a liquefied compressed gas.] 

Chemical & Physical 

Properties: 

MW: 64.5 

BP: 54°F 

Sol: 0.6% 

Fl.P: NA (Gas) 

 -58°F (Liquid) 

IP: 10.97 eV 

RGasD: 2.23 

Sp.Gr: 0.92 (Liquid at 32°F) 

VP: 1000 mmHg 

FRZ: -218°F 

UEL: 15.4% 

LEL: 3.8% 

Flammable Gas 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact (liquid) 

Eyes: Prevent eye contact (liquid) 

Wash skin: N.R. 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

OSHA 

3800 ppm: Sa*/ScbaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Chemically-active metals such as sodium, potassium, calcium, powdered 

aluminum, zinc & magnesium; oxidizers; water or steam [Note: Reacts with water to form hydrochloric acid.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs (liquid), Ing (liquid), Con 

SY: Inco, inebri; abdom cramps; card arrhy, card arrest; liver, 

kidney damage 

TO: Liver, kidneys, resp sys, CVS, CNS 

First Aid (see Table 6): 

Eye: Irr immed (liquid) 

Skin: Water flush prompt (liquid) 

Breath: Resp support 

Swallow: Medical attention immed (liquid) 

E 

Ethylene chlorohydrin Formula: 

CH2ClCH2OH 

CAS#: 

107-07-3 

RTECS#: 

KK0875000 

IDLH: 

7 ppm 

Conversion: 1 ppm = 3.29 mg/m3 DOT: 1135 131 

Synonyms/Trade Names: 2-Chloroethanol, 2-Chloroethyl alcohol, Ethylene chlorhydrin 

Exposure Limits: 

NIOSH REL: C 1 ppm (3 mg/m3

) [skin] 

OSHA PEL†: TWA 5 ppm (16 mg/m3) [skin] 

Physical Description: Colorless liquid with a faint, ether-like odor. 

Measurement Methods 

(see Table 1): 

NIOSH 2513 

OSHA 7 

Chemical & Physical 

Properties: 

MW: 80.5 

BP: 262°F 

Sol: Miscible 

Fl.P: 140°F 

IP: 10.90 eV 

Sp.Gr: 1.20 

VP: 5 mmHg 

FRZ: -90°F 

UEL: 15.9% 

LEL: 4.9% 

Class IIIA Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

7 ppm: Sa*/ScbaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, strong caustics, water or steam 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit muc memb; nau, vomit; dizz, inco; numb; vis dist; head; thirst; 

delirium; low BP; collapse, shock, coma; liver, kidney damage 

TO: Resp sys, liver, kidneys, CNS, CVS, eyes 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

135
E 

Ethylenediamine Formula: 

NH2CH2CH2NH2

CAS#: 

107-15-3 

RTECS#: 

KH8575000 

IDLH: 

1000 ppm 

Conversion: 1 ppm = 2.46 mg/m3 DOT: 1604 132 

Synonyms/Trade Names: 1,2-Diaminoethane; 1,2-Ethanediamine; Ethylenediamine (anhydrous) 

Exposure Limits: 

NIOSH REL: TWA 10 ppm (25 mg/m3) 

OSHA PEL: TWA 10 ppm (25 mg/m3

) 

Physical Description: Colorless, viscous liquid with an ammonia-like odor. [fungicide] 

[Note: A solid below 47°F.] 

Measurement Methods 

(see Table 1): 

NIOSH 2540 

OSHA 60 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam/Daily 

Remove: When wet (flamm) 

Change: N.R. 

Provide: Eyewash (>5%) 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

250 ppm: Sa:Cf£/PaprS£ 

500 ppm: CcrFS/GmFS/PaprTS£/ 

 ScbaF/SaF 

1000 ppm: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFS/ScbaE 

Chemical & Physical 

Properties: 

MW: 60.1 

BP: 241°F 

Sol: Miscible 

Fl.P: 93°F 

IP: 8.60 eV 

Sp.Gr: 0.91 

VP: 11 mmHg 

FRZ: 47°F 

UEL(212°F): 12% 

LEL(212°F): 2.5% 

Class IC Flammable Liquid 

Incompatibilities and Reactivities: Strong acids & oxidizers, carbon tetrachloride 

& other chlorinated organic compounds, carbon disulfide 

[Note: Corrosive to metals.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit nose, resp sys; sens derm; asthma; liver, kidney damage 

TO: Skin, resp sys, liver, kidneys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

Ethylene dibromide Formula: 

BrCH2CH2Br 

CAS#: 

106-93-4 

RTECS#: 

KH9275000 

IDLH: 

Ca [100 ppm] 

Conversion: 1 ppm = 7.69 mg/m3 DOT: 1605 154 

Synonyms/Trade Names: 1,2-Dibromoethane; Ethylene bromide; Glycol dibromide 

Exposure Limits: 

NIOSH REL: Ca 

 TWA 0.045 ppm 

 C 0.13 ppm [15-minute] 

 See Appendix A 

OSHA PEL: TWA 20 ppm 

 C 30 ppm 

 50 ppm [5-minute maximum peak] 

Measurement Methods 

(see Table 1): 

NIOSH 1008 

OSHA 2 

Physical Description: Colorless liquid or solid (below 50°F) with a sweet odor. [fumigant] 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Chemical & Physical Properties: 

MW: 187.9 

BP: 268°F 

Sol: 0.4% 

Fl.P: NA 

IP: 9.45 eV 

Sp.Gr: 2.17 

VP: 12 mmHg 

FRZ: 50°F 

UEL: NA 

LEL: NA 

Noncombustible Liquid 

Incompatibilities and Reactivities: Chemically-active metals such as 

sodium, potassium, calcium, hot aluminum & magnesium; liquid ammonia; 

strong oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, resp sys; derm with vesic; liver, heart, spleen, 

kidney damage; repro effects; [carc] 

TO: Eyes, skin, resp sys, liver, kidneys, repro sys [in animals: skin & 

lung tumors] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

136
Ethylene dichloride Formula: 

ClCH2CH2Cl 

CAS#: 

107-06-2 

RTECS#: 

KI0525000 

IDLH: 

Ca [50 ppm] 

Conversion: 1 ppm = 4.05 mg/m3 DOT: 1184 131 

Synonyms/Trade Names: 1,2-Dichloroethane; Ethylene chloride; Glycol dichloride 

Exposure Limits: 

NIOSH REL: Ca 

 TWA 1 ppm (4 mg/m3

) 

 ST 2 ppm (8 mg/m3) 

 See Appendix A, 

 See Appendix C (Chloroethanes) 

OSHA PEL†: TWA 50 ppm 

 C 100 ppm 

 200 ppm [5-minute maximum peak in any 3 hours] 

Measurement Methods 

(see Table 1): 

NIOSH 1003 

OSHA 3 

Physical Description: Colorless liquid with a pleasant, chloroform-like odor. [Note: Decomposes slowly, 

becomes acidic & darkens in color.] 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Chemical & Physical Properties: 

MW: 99.0 

BP: 182°F 

Sol: 0.9% 

Fl.P: 56°F 

IP: 11.05 eV 

Sp.Gr: 1.24 

VP: 64 mmHg 

FRZ: -32°F 

UEL: 16% 

LEL: 6.2% 

Class IB Flammable Liquid 

Incompatibilities and Reactivities: Strong oxidizers & caustics; chemicallyactive metals such as magnesium or aluminum powder, sodium & potassium; 

liquid ammonia [Note: Decomposes to vinyl chloride & HCl above 1112°F.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Abs, Con 

SY: Irrit eyes, corn opac; CNS depres; nau, vomit; derm; liver, 

kidney, CVS damage; [carc] 

TO: Eyes, skin, kidneys, liver, CNS, CVS [in animals: 

forestomach, mammary gland & circulatory sys cancer] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 

E 

Ethylene glycol Formula: 

HOCH2CH2OH 

CAS#: 

107-21-1 

RTECS#: 

KW2975000 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: 1,2-Dihydroxyethane; 1,2-Ethanediol; Glycol; Glycol alcohol; Monoethylene glycol 

Exposure Limits: 

NIOSH REL: See Appendix D 

OSHA PEL†: none 

Physical Description: Clear, colorless, syrupy, odorless liquid. [antifreeze] 

[Note: A solid below 9°F.] 

Measurement Methods 

(see Table 1): 

NIOSH 5523 

OSHA PV2024 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Chemical & Physical Properties: 

MW: 62.1 

BP: 388°F 

Sol: Miscible 

Fl.P: 232°F 

IP: ? 

Sp.Gr: 1.11 

VP: 0.06 mmHg 

FRZ: 9°F 

UEL: 15.3% 

LEL: 3.2% 

Class IIIB Combustible Liquid 

Incompatibilities and Reactivities: Strong oxidizers, chromium trioxide, 

potassium permanganate, sodium peroxide 

[Note: Hygroscopic (i.e., absorbs moisture from the air).] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, nose, throat; nau, vomit, abdom pain, lass; dizz, 

stupor, convuls, CNS depres; skin sens 

TO: Eyes, skin, resp sys, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

137
E 

Ethylene glycol dinitrate Formula: 

O2NOCH2CH2ONO2

CAS#: 

628-96-6 

RTECS#: 

KW5600000 

IDLH: 

75 mg/m3

Conversion: 1 ppm = 6.22 mg/m3 DOT: 

Synonyms/Trade Names: EGDN; 1,2-Ethanediol dinitrate; Ethylene dinitrate; Ethylene nitrate; Glycol dinitrate; 

Nitroglycol 

Exposure Limits: 

NIOSH REL: ST 0.1 mg/m3

 [skin] 

OSHA PEL†: C 0.2 ppm (1 mg/m3) [skin] 

Physical Description: Colorless to yellow, oily, odorless liquid. [Note: An explosive 

ingredient (60-80%) in dynamite along with nitroglycerine (40-20%).] 

Measurement Methods 

(see Table 1): 

NIOSH 2507 

OSHA 43 

Chemical & Physical 

Properties: 

MW: 152.1 

BP: 387°F 

Sol: Insoluble 

Fl.P: 419°F 

IP: ? 

Sp.Gr: 1.49 

VP: 0.05 mmHg 

FRZ: -8°F 

UEL: ? 

LEL: ? 

Explosive Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: Daily 

Provide: Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

1 mg/m3

: Sa* 

2.5 mg/m3

: Sa:Cf* 

5 mg/m3

: SaT:Cf*/ScbaF/SaF 

75 mg/m3

: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Incompatibilities and Reactivities: Acids, alkalis 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Throb head; dizz; nau, vomit, abdom pain; hypotension, flush, 

palp, angina; methemo; delirium, CNS depres; irrit skin; in animals: 

anemia; liver, kidney damage 

TO: Skin, CVS, blood, liver, kidneys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

Ethyleneimine Formula: 

C2H5N 

CAS#: 

151-56-4 

RTECS#: 

KX5075000 

IDLH: 

Ca [100 ppm] 

Conversion: 1 ppm = 1.76 mg/m3 DOT: 1185 131P (inhibited) 

Synonyms/Trade Names: Aminoethylene, Azirane, Aziridine, Dimethyleneimine, Dimethylenimine, Ethylenimine, 

Ethylimine 

Exposure Limits: 

NIOSH REL: Ca 

 See Appendix A 

OSHA PEL: [1910.1012] See Appendix B 

Physical Description: Colorless liquid with an ammonia-like odor. 

[Note: Usually contains inhibitors to prevent polymerization.] 

Measurement Methods 

(see Table 1): 

NIOSH 3514 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam/Daily 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

See Appendix E (page 351) 

Chemical & Physical Properties: 

MW: 43.1 

BP: 133°F 

Sol: Miscible 

Fl.P: 12°F 

IP: 9.20 eV 

Sp.Gr: 0.83 

VP: 160 mmHg 

FRZ: -97°F 

UEL: 54.8% 

LEL: 3.3% 

Class IB Flammable Liquid 

Incompatibilities and Reactivities: Polymerizes explosively in presence of 

acids [Note: Explosive silver derivatives may be formed with silver alloys 

(e.g., silver solder).] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, nose, throat; nau, vomit; head, dizz; pulm edema; liver, 

kidney damage; eye burns; skin sens; [carc] 

TO: Eyes, skin, resp sys, liver, kidneys [in animals: lung & liver tumors] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

138
Ethylene oxide Formula: 

C2H4O 

CAS#: 

75-21-8 

RTECS#: 

KX2450000 

IDLH: 

Ca [800 ppm] 

Conversion: 1 ppm = 1.80 mg/m3 DOT: 1040 119P 

Synonyms/Trade Names: Dimethylene oxide; 1,2-Epoxy ethane; Oxirane 

Exposure Limits: 

NIOSH REL: Ca 

 TWA <0.1 ppm (0.18 mg/m3

) 

 C 5 ppm (9 mg/m3) [10-min/day] 

 See Appendix A 

OSHA PEL: [1910.1047] TWA 1 ppm 

 5 ppm [15-minute Excursion] 

Physical Description: Colorless gas or liquid (below 51°F) with an ether-like odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1614, 3800 

OSHA 30, 49, 50 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact (liquid) 

Eyes: Prevent eye contact (liquid) 

Wash skin: When contam (liquid) 

Remove: When wet (flamm) 

Change: N.R. 

Provide: Quick drench (liquid) 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

5 ppm: GmFS†/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFS†/ScbaE 

See Appendix E (page 351) 

Chemical & Physical Properties: 

MW: 44.1 

BP: 51°F 

Sol: Miscible 

Fl.P: NA (Gas) 

 -20°F (Liquid) 

IP: 10.56 eV 

RGasD: 1.49 

Sp.Gr: 0.82 (Liquid at 50°F) 

VP: 1.46 atm 

FRZ: -171°F 

UEL: 100% 

LEL: 3.0% 

Flammable Gas 

Incompatibilities and Reactivities: Strong acids, alkalis & oxidizers; 

chlorides of iron, aluminum & tin; oxides of iron & aluminum; water 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, (liquid), Con 

SY: Irrit eyes, skin, nose, throat; peculiar taste; head; nau, vomit, diarr; dysp, cyan, 

pulm edema; drow, lass, inco; EKG abnor; eye, skin burns (liq or high vap conc); 

liquid: frostbite; repro effects; [carc]; in animals: convuls; liver, kidney damage 

TO: Eyes, skin, resp sys, liver, CNS, blood, kidneys, repro sys [peritoneal cancer, 

leukemia] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention 

 immed (liquid) 

E 

Ethylene thiourea Formula: 

C3H6N2S 

CAS#: 

96-45-7 

RTECS#: 

NI9625000 

IDLH: 

Ca [N.D.] 

Conversion: DOT: 

Synonyms/Trade Names: 1,3-Ethylene-2-thiourea; N,N-Ethylenethiourea; ETU; 2-Imidazolidine-2-thione 

Exposure Limits: 

NIOSH REL: Ca OSHA PEL: none 

 Use encapsulated form. 

 See Appendix A 

Physical Description: White to pale-green, crystalline solid with a faint, amine odor. 

[Note: Used as an accelerator in the curing of polychloroprene & other elastomers.] 

Measurement Methods 

(see Table 1): 

NIOSH 5011 

OSHA 95 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam/Daily 

Remove: When wet or contam 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Chemical & Physical Properties: 

MW: 102.2 

BP: 446-595°F 

Sol(86°F): 2% 

Fl.P: 486°F 

IP: 8.15 eV 

Sp.Gr: ? 

VP: 16 mmHg 

MLT: 392°F 

UEL: ? 

LEL: ? 

Combustible Solid Incompatibilities and Reactivities: Acrolein 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes; in animals: thickening of the skin; goiter; terato effects; [carc] 

TO: Eyes, skin, thyroid, repro sys [in animals: liver, thyroid & lymphatic sys 

tumors] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

139
E 

Ethyl ether Formula: 

C2H5OC2H5

CAS#: 

60-29-7 

RTECS#: 

KI5775000 

IDLH: 

1900 ppm [10%LEL]

Conversion: 1 ppm = 3.03 mg/m3 DOT: 1155 127 

Synonyms/Trade Names: Diethyl ether, Diethyl oxide, Ethyl oxide, Ether, Solvent ether 

Exposure Limits: 

NIOSH REL: See Appendix D 

OSHA PEL†: TWA 400 ppm (1200 mg/m3

) 

Physical Description: Colorless liquid with a pungent, sweetish odor. 

[Note: A gas above 94°F.] 

Measurement Methods 

(see Table 1): 

NIOSH 1610 

OSHA 7 

Chemical & Physical 

Properties: 

MW: 74.1 

BP: 94°F 

Sol: 8% 

Fl.P: -49°F 

IP: 9.53 eV 

Sp.Gr: 0.71 

VP: 440 mmHg 

FRZ: -177°F 

UEL: 36.0% 

LEL: 1.9% 

Class IA Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: N.R. 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

OSHA 

1900 ppm: CcrOv*/GmFOv/PaprOv*/ 

 Sa*/ScbaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, halogens, sulfur, sulfur compounds 

[Note: Tends to form explosive peroxides under influence of air and light.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, upper resp sys; dizz, drow, head, excited, 

narco; nau, vomit 

TO: Eyes, skin, resp sys, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 

Ethyl formate Formula: 

CH3CH2OCHO 

CAS#: 

109-94-4 

RTECS#: 

LQ8400000 

IDLH: 

1500 ppm 

Conversion: 1 ppm = 3.03 mg/m3 DOT: 1190 129 

Synonyms/Trade Names: Ethyl ester of formic acid, Ethyl methanoate 

Exposure Limits: 

NIOSH REL: TWA 100 ppm (300 mg/m3

) 

OSHA PEL: TWA 100 ppm (300 mg/m3

) 

Physical Description: Colorless liquid with a fruity odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1452 

OSHA 7 

Chemical & Physical 

Properties: 

MW: 74.1 

BP: 130°F 

Sol(64°F): 9% 

Fl.P: -4°F 

IP: 10.61 eV 

Sp.Gr: 0.92 

VP: 200 mmHg 

FRZ: -113°F 

UEL: 16.0% 

LEL: 2.8% 

Class IB Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

1500 ppm: Sa:Cf£/PaprOv£/CcrFOv/ 

 GmFOv/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Nitrates; strong oxidizers, alkalis & acids 

[Note: Decomposes slowly in water to form ethyl alcohol and formic acid.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, upper resp sys; in animals: narco 

TO: Eyes, resp sys, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

140
Ethylidene norbornene Formula: 

C9H12

CAS#: 

16219-75-3 

RTECS#: 

RB9450000 

IDLH: 

N.D. 

Conversion: 1 ppm = 4.92 mg/m3 DOT: 

Synonyms/Trade Names: ENB, 5-Ethylidenebicyclo(2.2.1)hept-2-ene, 5-Ethylidene-2-norbornene 

[Note: Due to its reactivity, ENB may be stabilized with tert-butyl catechol.] 

Exposure Limits: 

NIOSH REL: C 5 ppm (25 mg/m3

) 

OSHA PEL†: none 

Physical Description: Colorless to white liquid with a turpentine-like odor. 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical Properties: 

MW: 120.2 

BP: 298°F 

Sol: ? 

Fl.P(oc): 101°F 

IP: ? 

Sp.Gr: 0.90 

VP: 4 mmHg 

FRZ: -112°F 

UEL: ? 

LEL: ? 

Class II Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: Daily 

Remove: When wet or contam 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Oxygen 

[Note: ENB should be stored in a nitrogen atmosphere since it reacts with oxygen.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, nose, throat; head; cough, dysp; nau, vomit; 

olfactory, taste changes; chemical pneu (aspir liquid); in animals: liver, 

kidney, urogenital inj; bone marrow effects 

TO: Eyes, skin, resp sys, CNS, liver, kidneys, urogenital system, bone 

marrow 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

E 

Ethyl mercaptan Formula: 

CH3CH2SH 

CAS#: 

75-08-1 

RTECS#: 

KI9625000 

IDLH: 

500 ppm 

Conversion: 1 ppm = 2.54 mg/m3 DOT: 2363 129 

Synonyms/Trade Names: Ethanethiol, Ethyl sulfhydrate, Mercaptoethane 

Exposure Limits: 

NIOSH REL: C 0.5 ppm (1.3 mg/m3

) [15-minute] 

OSHA PEL†: C 10 ppm (25 mg/m3

) 

Physical Description: Colorless liquid with a strong, skunk-like odor. 

[Note: A gas above 95°F.] 

Measurement Methods 

(see Table 1): 

NIOSH 2542 

Chemical & Physical 

Properties: 

MW: 62.1 

BP: 95°F 

Sol: 0.7% 

Fl.P: -55°F 

IP: 9.29 eV 

Sp.Gr: 0.84 

VP: 442 mmHg 

FRZ: -228°F 

UEL: 18.0% 

LEL: 2.8% 

Class IA Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

5 ppm: CcrOv/Sa 

12.5 ppm: Sa:Cf/PaprOv 

25 ppm: CcrFOv/GmFOv/SaT:Cf/PaprTOv/ 

 ScbaF/SaF 

500 ppm: Sa:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers [Note: Reacts violently with calcium hypochlorite.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit muc memb; head, nau; in animals: inco, lass; liver, 

kidney damage; cyan; narco 

TO: Eyes, resp sys, liver, kidneys, blood 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

141
E 

N-Ethylmorpholine Formula: 

C4H8ONCH2CH3

CAS#: 

100-74-3 

RTECS#: 

QE4025000 

IDLH: 

100 ppm 

Conversion: 1 ppm = 4.71 mg/m3 DOT: 

Synonyms/Trade Names: 4-Ethylmorpholine 

Exposure Limits: 

NIOSH REL: TWA 5 ppm (23 mg/m3) [skin] 

OSHA PEL†: TWA 20 ppm (94 mg/m3

) [skin] 

Physical Description: Colorless liquid with an ammonia-like odor. 

Measurement Methods 

(see Table 1): 

NIOSH S146 (II-3) 

Chemical & Physical 

Properties: 

MW: 115.2 

BP: 281°F 

Sol: Miscible 

Fl.P(oc): 90°F 

IP: ? 

Sp.Gr: 0.90 

VP: 6 mmHg 

FRZ: -81°F 

UEL: ? 

LEL: ? 

Class IC Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Provide: Eyewash (>15%) 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

50 ppm: CcrOv*/Sa* 

100 ppm: Sa:Cf*/PaprOv*/CcrFOv/ 

 GmFOv/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong acids, strong oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, nose, throat; vis dist: corn edema, blue-gray 

vision, colored haloes 

TO: Eyes, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush prompt 

Breath: Resp support 

Swallow: Medical attention immed 

Ethyl silicate Formula: 

(C2H5)4SiO4

CAS#: 

78-10-4 

RTECS#: 

VV9450000 

IDLH: 

700 ppm 

Conversion: 1 ppm = 8.52 mg/m3 DOT: 1292 129 

Synonyms/Trade Names: Ethyl orthosilicate, Ethyl silicate (condensed), Tetraethoxysilane, 

Tetraethyl orthosilicate, Tetraethyl silicate 

Exposure Limits: 

NIOSH REL: TWA 10 ppm (85 mg/m3

) 

OSHA PEL†: TWA 100 ppm (850 mg/m3

) 

Physical Description: Colorless liquid with a sharp, alcohol-like odor. 

Measurement Methods 

(see Table 1): 

NIOSH S264 (II-3) 

Chemical & Physical 

Properties: 

MW: 208.3 

BP: 336°F 

Sol: Reacts 

Fl.P: 99°F 

IP: 9.77 eV 

Sp.Gr: 0.93 

VP: 1 mmHg 

FRZ: -117°F 

UEL: ? 

LEL: ? 

Class IC Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

100 ppm: Sa* 

250 ppm: Sa:Cf* 

500 ppm: ScbaF/SaF 

700 ppm: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, water 

[Note: Reacts with water to form a silicone adhesive (a milky-white mass).] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, nose; in animals: lac; dysp, pulm edema; tremor, 

narco; liver, kidney damage; anemia 

TO: Eyes, resp sys, liver, kidneys, blood, skin 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 

142
Fenamiphos Formula: 

C13H22NO3PS 

CAS#: 

22224-92-6 

RTECS#: 

TB3675000 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: Ethyl 3-methyl-4-(methylthio)phenyl-(1-methylethyl)phosphoramidate, Nemacur®, 

Phenamiphos 

Exposure Limits: 

NIOSH REL: TWA 0.1 mg/m3

 [skin] 

OSHA PEL†: none 

Physical Description: Off-white to tan, waxy solid. [insecticide] 

[Note: Found commercially as a granular ingredient (5-15%) or in an emulsifiable 

concentrate (400 g/l).] 

Measurement Methods 

(see Table 1): 

NIOSH 5600 

Chemical & Physical Properties: 

MW: 303.4 

BP: ? 

Sol: 0.03% 

Fl.P: ? 

IP: ? 

Sp.Gr: 1.14 

VP: 0.00005 mmHg 

MLT: 121°F 

UEL: ? 

LEL: ? 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam/Daily 

Remove: When wet or contam 

Change: Daily 

Provide: Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: None reported [Note: May hydrolyze under alkaline conditions.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Nau, vomit, abdom cramps, diarr, salv; head, dizz, lass; rhin, 

chest tight; blurred vision, miosis; card irreg; musc fasc; dysp 

TO: Resp sys, CNS, CVS, blood chol 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

F 

Fensulfothion Formula: 

C11H17O4PS2

CAS#: 

115-90-2 

RTECS#: 

TF3850000 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: Dasanit®; O,O-Diethyl O-(p-methylsulfinyl)phenyl)phosphorothioate; Terracur P® 

Exposure Limits: 

NIOSH REL: TWA 0.1 mg/m3

OSHA PEL†: none 

Physical Description: Brown liquid or yellow oil. [pesticide] 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical Properties: 

MW: 308.4 

BP: ? 

Sol(77°F): 0.2% 

Fl.P: ? 

IP: ? 

Sp.Gr: 1.20 

VP: ? 

FRZ: ? 

UEL: ? 

LEL: ? 

Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Alkalis 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit skin; nau, vomit, abdom cramps, diarr, salv; head, dizz, lass; 

rhin, chest tight; blurred vision, miosis; card irreg; musc fasc; dys 

TO: Skin, resp sys, CNS, CVS, blood chol 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

143
F 

Fenthion Formula: 

C10H15O3PS 

CAS#: 

55-38-9 

RTECS#: 

TF9625000 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: Baytex; Entex; O,O-Dimethyl O-3-methyl-4-methylthiophenyl phosphorothioate 

Exposure Limits: 

NIOSH REL: See Appendix D 

OSHA PEL†: none 

Physical Description: Colorless to brown liquid with a slight, garlic-like odor. 

[insecticide] 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical Properties: 

MW: 278.3 

BP: ? 

Sol: 0.006% 

Fl.P: NA 

IP: ? 

Sp.Gr: 1.25 

VP: 0.0003 mmHg 

FRZ: 43°F 

UEL: NA 

LEL: NA 

Noncombustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Nau, vomit, abdom cramps, diarr, salv; head, dizz, lass; rhin, chest 

tight; blurred vision, miosis; card irregularities; musc fasc; dysp 

TO: Resp sys, CNS, CVS, plasma chol 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

Ferbam Formula: 

[(CH3)2NCS2]3Fe 

CAS#: 

14484-64-1 

RTECS#: 

NO8750000 

IDLH: 

800 mg/m3

Conversion: DOT: 

Synonyms/Trade Names: tris(Dimethyldithiocarbamato)iron, Ferric dimethyl dithiocarbamate 

Exposure Limits: 

NIOSH REL: TWA 10 mg/m3

OSHA PEL†: TWA 15 mg/m3

Physical Description: Dark brown to black, odorless solid. [fungicide] 

Measurement Methods 

(see Table 1): 

NIOSH 0500 

Chemical & Physical 

Properties: 

MW: 416.5 

BP: Decomposes 

Sol: 0.01% 

Fl.P: ? 

IP: 7.72 eV 

Sp.Gr: ? 

VP: 0 mmHg (approx) 

MLT: >356°F (Decomposes) 

UEL: ? 

LEL: ? 

MEC: 55 g/m3

Combustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

50 mg/m3: Qm 

100 mg/m3

: 95XQ*/Sa* 

250 mg/m3

: Sa:Cf*/PaprHie* 

500 mg/m3: 100F/SaT:Cf*/PaprTHie*/ 

 ScbaF/SaF 

800 mg/m3

: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, moisture 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, resp tract; derm; GI dist 

TO: Eyes, skin, resp sys, GI tract 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 

144
Ferrovanadium dust Formula: 

FeV 

CAS#: 

12604-58-9 

RTECS#: 

LK2900000 

IDLH: 

500 mg/m3

Conversion: DOT: 

Synonyms/Trade Names: Ferrovanadium 

Exposure Limits: 

NIOSH REL*: TWA 1 mg/m3 

 ST 3 mg/m3 

 [*Note: The REL also applies to Vanadium metal and Vanadium carbide.]

OSHA PEL†: TWA 1 mg/m3

Physical Description: Dark, odorless particulate dispersed in air. 

[Note: Ferrovanadium metal is an alloy usually containing 50-80% vanadium.] 

Measurement Methods 

(see Table 1): 

OSHA ID121, ID125G 

Chemical & Physical Properties: 

MW: 106.8 

BP: ? 

Sol: Insoluble 

Fl.P: NA 

IP: NA 

Sp.Gr: ? 

VP: 0 mmHg (approx) 

MLT: 2696-2768°F 

UEL: NA 

LEL: NA 

MEC: 1.3 g/m3

Metal: Noncombustible Solid, but 

dust may be an explosion hazard. 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

5 mg/m3

: Qm* 

10 mg/m3

: 95XQ*/Sa* 

25 mg/m3

: Sa:Cf*/PaprHie* 

50 mg/m3

: 100F/SaT:Cf*/PaprTHie*/ 

 ScbaF/SaF 

500 mg/m3

: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con 

SY: Irrit eyes, resp sys; in animals: bron, pneu 

TO: Eyes, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Breath: Resp support 

F 

Fibrous glass dust Formula: CAS#: RTECS#: 

LK3651000 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: Fiber glas®, Fiberglass, Glass fibers, Glass wool 

[Note: Usually produced from borosilicate & low alkali silicate glasses.] 

Exposure Limits: 

NIOSH REL: TWA 3 fibers/cm3

 (fibers ≤ 3.5 μm in diameter & ≥ 10 μm in length) 

 TWA 5 mg/m3

 (total) 

OSHA PEL: TWA 15 mg/m3 (total) 

 TWA 5 mg/m3

 (resp) 

Physical Description: Typically, glass filaments >3 μm in diameter or glass “wool” 

with diameters down to 0.05 μm & >1 μm in length. 

Measurement Methods 

(see Table 1): 

NIOSH 7400 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: Daily 

Remove: N.R. 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

5X REL: Qm 

10X REL: 95XQ/Sa 

25X REL: Sa:Cf/PaprHie 

50X REL: 100F/PaprTHie/ScbaF/SaF 

1000X REL: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Chemical & Physical 

Properties: 

MW: NA 

BP: NA 

Sol: Insoluble 

Fl.P: NA 

IP: NA 

Sp.Gr: 2.5 

VP: 0 mmHg (approx) 

MLT: ? 

UEL: NA 

LEL: NA 

Noncombustible Fibers Incompatibilities and Reactivities: None reported 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con 

SY: Irrit eyes, skin, nose, throat; dysp 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Breath: Fresh air 

145
F 

Fluorine Formula: 

F2

CAS#: 

7782-41-4 

RTECS#: 

LM6475000 

IDLH: 

25 ppm 

Conversion: 1 ppm = 1.55 mg/m3 DOT: 1045 124; 9192 167 (cryogenic liquid) 

Synonyms/Trade Names: Fluorine-19 

Exposure Limits: 

NIOSH REL: TWA 0.1 ppm (0.2 mg/m3) 

OSHA PEL: TWA 0.1 ppm (0.2 mg/m3

) 

Physical Description: Pale-yellow to greenish gas with a pungent, irritating odor. 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical 

Properties: 

MW: 38.0 

BP: -307°F 

Sol: Reacts 

Fl.P: NA 

IP: 15.70 eV 

RGasD: 1.31 

VP: >1 atm 

FRZ: -363°F 

UEL: NA 

LEL: NA 

Nonflammable Gas, but an 

extremely strong oxidizer. 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact (liquid) 

Eyes: Prevent eye contact (liquid) 

Wash skin: When contam (liquid) 

Remove: When wet or contam (liquid) 

Change: N.R. 

Provide: Eyewash (liquid) 

 Quick drench (liquid) 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

1 ppm: Sa* 

2.5 ppm: Sa:Cf* 

5 ppm: ScbaF/SaF 

25 ppm: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFS¿/ScbaE 

Incompatibilities and Reactivities: Water, nitric acid, oxidizers, organic compounds 

[Note: Reacts violently with all combustible materials, except the metal containers in which it is shipped. 

Reacts with H2O to form hydrofluoric acid.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con 

SY: Irrit eyes, nose, resp sys; lar spasm, wheez; pulm edema; 

eye, skin burns; in animals: liver, kidney damage 

TO: Eyes, skin, resp sys, liver, kidneys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Fluorotrichloromethane Formula: 

CCl3F 

CAS#: 

75-69-4 

RTECS#: 

PB6125000 

IDLH: 

2000 ppm 

Conversion: 1 ppm = 5.62 mg/m3 DOT: 

Synonyms/Trade Names: Freon® 11, Monofluorotrichloromethane, Refrigerant 11, Trichlorofluoromethane, 

Trichloromonofluoromethane 

Exposure Limits: 

NIOSH REL: C 1000 ppm (5600 mg/m3

) 

OSHA PEL†: TWA 1000 ppm (5600 mg/m3

) 

Measurement Methods 

(see Table 1): 

NIOSH 1006 

Physical Description: Colorless to water-white, nearly odorless liquid or gas (above 75°F). 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: N.R. 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

2000 ppm: Sa/ScbaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Chemical & Physical Properties: 

MW: 137.4 

BP: 75°F 

Sol(75°F): 0.1% 

Fl.P: NA 

IP: 11.77 eV 

RGasD: 4.74 

Sp.Gr: 1.47 (Liquid at 75°F) 

VP: 690 mmHg 

FRZ: -168°F 

UEL: NA 

LEL: NA 

Noncombustible Liquid 

Nonflammable Gas 

Incompatibilities and Reactivities: Chemically-active metals such as 

sodium, potassium, calcium, powdered aluminum, zinc, magnesium & lithium 

shavings; granular barium 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Inco, tremor; derm; card arrhy, card arrest; asphy; liquid: frostbite 

TO: Skin, resp sys, CVS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

146
Fluoroxene Formula: 

CF3CH2OCH=CH2

CAS#: 

406-90-6 

RTECS#: 

KO4250000 

IDLH: 

N.D. 

Conversion: 1 ppm = 5.16 mg/m3 DOT: 

Synonyms/Trade Names: 2,2,2-Trifluoroethoxyethene; 2,2,2-Trifluoroethyl vinyl ether 

Exposure Limits: 

NIOSH REL*: C 2 ppm (10.3 mg/m3) [60-minute] 

 [*Note: REL for exposure to waste anesthetic gas.] 

OSHA PEL: none 

Physical Description: Liquid. [inhalation anesthetic] [Note: A gas above 109°F.] 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical Properties: 

MW: 126.1 

BP: 109°F 

Sol: ? 

Fl.P: ? 

IP: ? 

Sp.Gr: 1.14 

VP: 286 mmHg 

FRZ: ? 

UEL: ? 

LEL: ? 

Combustible Liquid 

[Potentially EXPLOSIVE!] 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: Prevent eye contact 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: None reported 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes; CNS depres, analgesia, anes, convuls, resp depres 

TO: Eyes, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash 

Breath: Resp support 

Swallow: Medical attention immed 

F 

Fonofos Formula: 

C10H15OPS2

CAS#: 

944-22-9 

RTECS#: 

TA5950000 

IDLH: 

N.D. 

Conversion: 1 ppm = 10.07 mg/m3 DOT: 

Synonyms/Trade Names: Dyfonate®, Dyphonate, O-Ethyl-S-phenyl ethylphosphorothioate, Fonophos 

Exposure Limits: 

NIOSH REL: TWA 0.1 mg/m3

 [skin] 

OSHA PEL†: none 

Physical Description: Light-yellow liquid with an aromatic odor. [insecticide] 

Measurement Methods 

(see Table 1): 

NIOSH 5600 

OSHA PV2027 

Chemical & Physical Properties: 

MW: 246.3 

BP: ? 

Sol: 0.001% 

Fl.P: >201°F 

IP: ? 

Sp.Gr: 1.15 

VP(77°F): 0.0002 mmHg 

FRZ: ? 

UEL: ? 

LEL: ? 

Class IIIB Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: None reported 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Nau, vomit, abdom cramps, diarr, salv; head, dizz, lass; rhin, 

chest tight; blurred vision, miosis; card irreg; musc fasc; dysp 

TO: Resp sys, CNS, CVS, blood chol 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

147
F 

Formaldehyde Formula: 

HCHO 

CAS#: 

50-00-0 

RTECS#: 

LP8925000 

IDLH: 

Ca [20 ppm] 

Conversion: 1 ppm = 1.23 mg/m3 DOT: 

Synonyms/Trade Names: Methanal, Methyl aldehyde, Methylene oxide 

Exposure Limits: 

NIOSH REL: Ca 

 TWA 0.016 ppm 

 C 0.1 ppm [15-minute] 

 See Appendix A 

OSHA PEL: [1910.1048] TWA 0.75 ppm 

 ST 2 ppm 

Measurement Methods 

(see Table 1): 

NIOSH 2016, 2541, 3500, 3800 

OSHA ID205, 52 

Physical Description: Nearly colorless gas with a pungent, suffocating odor. [Note: Often used in an aqueous 

solution (see specific listing for Formalin).] 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: Prevent eye contact 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFS/ScbaE 

See Appendix E (page 351) 

Chemical & Physical Properties: 

MW: 30.0 

BP: -6°F 

Sol: Miscible 

Fl.P: NA (Gas) 

IP: 10.88 eV 

RGasD: 1.04 

VP: >1 atm 

FRZ: -134°F 

UEL: 73% 

LEL: 7.0% 

Flammable Gas 

Incompatibilities and Reactivities: Strong oxidizers, alkalis & acids; 

phenols; urea [Note: Pure formaldehyde has a tendency to polymerize. 

Reacts with HCl to form bis-Chloromethyl ether.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con 

SY: Irrit eyes, nose, throat, resp sys; lac; cough; wheez; [carc] 

TO: Eyes, resp sys [nasal cancer] 

First Aid (see Table 6): 

Eye: Irr immed 

Breath: Resp support 

Formalin (as formaldehyde) Formula: CAS#: RTECS#: IDLH: 

Ca [20 ppm] 

Conversion: DOT: 1198 132; 2209 132 

Synonyms/Trade Names: Formaldehyde solution 

[Note: Formalin is an aqueous solution that is 37% formaldehyde by weight; inhibited solutions usually contain 

6-12% methyl alcohol. Also see specific listings for Formaldehyde and Methyl alcohol.] 

Exposure Limits: 

NIOSH REL: Ca OSHA PEL: [1910.1048] TWA 0.75 ppm 

 TWA 0.016 ppm ST 2 ppm 

 C 0.1 ppm [15-minute] 

 See Appendix A 

Physical Description: Colorless liquid with a pungent odor. 

Measurement Methods 

(see Table 1): 

NIOSH 2016, 2541, 3500, 3800 

OSHA ID205, 52 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFS/ScbaE 

See Appendix E (page 351) 

Chemical & Physical 

Properties: 

MW: Varies 

BP: 214°F 

Sol: Miscible 

Fl.P: 185°F 

IP: ? 

Sp.Gr(77°F): 1.08 

VP: 1 mmHg 

FRZ: ? 

UEL: 73% 

LEL: 7% 

Class IIIA Combustible Liquid 

Incompatibilities and Reactivities: Strong oxidizers, alkalis & acids; phenols; 

urea; oxides; isocyanates; caustics; anhydrides 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, nose, throat, resp sys; lac; cough; wheez, derm; [carc] 

TO: Eyes, skin, resp sys [nasal cancer] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush prompt 

Breath: Resp support 

Swallow: Medical attention immed 

148
Formamide Formula: 

HCONH2

CAS#: 

75-12-7 

RTECS#: 

LQ0525000 

IDLH: 

N.D. 

Conversion: 1 ppm = 1.85 mg/m3 DOT: 

Synonyms/Trade Names: Carbamaldehyde, Methanamide 

Exposure Limits: 

NIOSH REL: TWA 10 ppm (15 mg/m3) [skin] 

OSHA PEL†: none 

Physical Description: Colorless, oily liquid. [Note: A solid below 37°F.] 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical Properties: 

MW: 45.1 

BP: 411°F (Decomposes) 

Sol: Miscible 

Fl.P(oc): 310°F 

IP: 10.20 eV 

Sp.Gr: 1.13 

VP(86°F): 0.1 mmHg 

FRZ: 37°F 

UEL: ? 

LEL: ? 

Class IIIB Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: Prevent eye contact 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Oxidizers, iodine, pyridine, sulfur trioxide, copper, brass, lead 

[Note: Hygroscopic (i.e., absorbs moisture from the air).] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, muc memb; drow, lass; nau; acidosis; skin 

eruptions; in animals: repro effects 

TO: Eyes, skin, resp sys, CNS, repro sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water wash 

Breath: Resp support 

Swallow: Medical attention immed 

F 

Formic acid Formula: 

HCOOH 

CAS#: 

64-18-6 

RTECS#: 

LQ4900000 

IDLH: 

30 ppm 

Conversion: 1 ppm = 1.88 mg/m3 DOT: 1779 153 

Synonyms/Trade Names: Formic acid (85-95% in aqueous solution); Hydrogen carboxylic acid; Methanoic acid 

Exposure Limits: 

NIOSH REL: TWA 5 ppm (9 mg/m3

) 

OSHA PEL: TWA 5 ppm (9 mg/m3

) 

Physical Description: Colorless liquid with a pungent, penetrating odor. 

[Note: Often used in an aqueous solution.] 

Measurement Methods 

(see Table 1): 

NIOSH 2011 

OSHA ID186SG 

Chemical & Physical Properties: 

MW: 46.0 

BP: 224°F (90% solution) 

Sol: Miscible 

Fl.P(oc): 122°F (90% solution) 

IP: 11.05 eV 

Sp.Gr: 1.22 (90% solution) 

VP: 35 mmHg 

FRZ: 20°F (90% solution) 

UEL: 57% (90% solution) 

LEL: 18% (90% solution) 

Class II Combustible Liquid (90% solution) 

Personal Protection/Sanitation

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

30 ppm: Sa*/ScbaF 

§: ScbaF:Pd,Pp/ 

 SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, strong caustics, concentrated sulfuric acid 

[Note: Corrosive to metals.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes; skin, throat; skin burns, derm; lac; rhin; cough, 

dysp; nau 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

149
F 

Furfural Formula: 

C5H4O2

CAS#: 

98-01-1 

RTECS#: 

LT7000000 

IDLH: 

100 ppm 

Conversion: 1 ppm = 3.93 mg/m3 DOT: 1199 132P 

Synonyms/Trade Names: Fural, 2-Furancarboxaldehyde, Furfuraldehyde, 2-Furfuraldehyde 

Exposure Limits: 

NIOSH REL: See Appendix D 

OSHA PEL†: TWA 5 ppm (20 mg/m3

) [skin] 

Physical Description: Colorless to amber liquid with an almond-like odor. 

[Note: Darkens in light and air.] 

Measurement Methods 

(see Table 1): 

NIOSH 2529 

OSHA 72 

Chemical & Physical 

Properties: 

MW: 96.1 

BP: 323°F 

Sol: 8% 

Fl.P: 140°F 

IP: 9.21 eV 

Sp.Gr: 1.16 

VP: 2 mmHg 

FRZ: -34°F 

UEL: 19.3% 

LEL: 2.1% 

Class IIIA Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

OSHA 

50 ppm: CcrOv*/Sa* 

100 ppm: Sa:Cf*/CcrFOv/PaprOv*/ 

 GmFOv/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong acids, oxidizers, strong alkalis 

[Note: May polymerize on contact with strong acids or strong alkalis.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, upper resp sys; head; derm 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush prompt 

Breath: Resp support 

Swallow: Medical attention immed 

Furfuryl alcohol Formula: 

C5H6O2

CAS#: 

98-00-0 

RTECS#: 

LU9100000 

IDLH: 

75 ppm 

Conversion: 1 ppm = 4.01 mg/m3 DOT: 2874 153 

Synonyms/Trade Names: 2-Furylmethanol, 2-Hydroxymethylfuran 

Exposure Limits: 

NIOSH REL: TWA 10 ppm (40 mg/m3

) [skin] 

 ST 15 ppm (60 mg/m3

) 

OSHA PEL†: TWA 50 ppm (200 mg/m3

) 

Physical Description: Colorless to amber liquid with a faint, burning odor. 

[Note: Darkens on exposure to light.] 

Measurement Methods 

(see Table 1): 

NIOSH 2505 

Chemical & Physical 

Properties: 

MW: 98.1 

BP: 338°F 

Sol: Miscible 

Fl.P: 149°F 

IP: ? 

Sp.Gr: 1.13 

VP(77°F): 0.6 mmHg 

FRZ: 6°F 

UEL: 16.3% 

LEL: 1.8% 

Class IIIA Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

75 ppm: CcrOv*/GmFOv/PaprOv*/ 

 Sa*/ScbaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers & acids 

[Note: Contact with organic acids may lead to polymerization.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, muc memb; dizz; nau, diarr; diuresis; resp, body 

temperature depres; vomit; derm 

TO: Eyes, skin, resp sys, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

150
Gasoline Formula: CAS#: 

8006-61-9 

RTECS#: 

LX3300000 

IDLH: 

Ca [N.D.] 

Conversion: 1 ppm = 4.5 mg/m3 (approx) DOT: 1203 128 

Synonyms/Trade Names: Motor fuel, Motor spirits, Natural gasoline, Petrol 

[Note: A complex mixture of volatile hydrocarbons (paraffins, cycloparaffins & aromatics).] 

Exposure Limits: 

NIOSH REL: Ca 

 See Appendix A 

OSHA PEL†: none 

Physical Description: Clear liquid with a characteristic odor. 

Measurement Methods 

(see Table 1): 

OSHA PV2028 

Chemical & Physical Properties: 

MW: 110 (approx) 

BP: 102°F 

Sol: Insoluble 

Fl.P: -45°F 

IP: ? 

Sp.Gr(60°F): 0.72-0.76 

VP: 38-300 mmHg 

FRZ: ? 

UEL: 7.6% 

LEL: 1.4% 

Class IB Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers such as peroxides, nitric acid & perchlorates 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, muc memb; derm; head, lass, blurred vision, 

dizz, slurred speech, conf, convuls; chemical pneu (aspir liquid); 

possible liver, kidney damage; [carc] 

TO: Eyes, skin, resp sys, CNS, liver, kidneys [in animals: liver & 

kidney cancer] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

G 

Germanium tetrahydride Formula: 

GeH4

CAS#: 

7782-65-2 

RTECS#: 

LY4900000 

IDLH: 

N.D. 

Conversion: 1 ppm = 3.13 mg/m3 DOT: 2192 119 

Synonyms/Trade Names: Germane, Germanium hydride, Germanomethane, Monogermane 

[Note: Used chiefly for the production of high purity germanium for use in semiconductors.] 

Exposure Limits: 

NIOSH REL: TWA 0.2 ppm (0.6 mg/m3

) 

OSHA PEL†: none 

Physical Description: Colorless gas with a pungent odor. 

[Note: Shipped as a compressed gas.] 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical Properties: 

MW: 76.6 

BP: -127°F 

Sol: Insoluble 

Fl.P: NA (Gas) 

IP: 11.34 eV 

RGasD: 2.65 

VP: >1 atm 

FRZ: -267°F 

UEL: ? 

LEL: ? 

Flammable Gas (may ignite 

SPONTANEOUSLY in air). 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Bromine 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh 

SY: Mal, head, dizz, fainting; dysp; nau, vomit; kidney inj; 

hemolytic effects 

TO: CNS, kidneys, blood 

First Aid (see Table 6): 

Breath: Resp support 

151
G 

Glutaraldehyde Formula: 

OCH(CH2)3CHO 

CAS#: 

111-30-8 

RTECS#: 

MA2450000 

IDLH: 

N.D. 

Conversion: 1 ppm = 4.09 mg/m3 DOT: 

Synonyms/Trade Names: Glutaric dialdehyde; 1,5-Pentanedial 

Exposure Limits: 

NIOSH REL: C 0.2 ppm (0.8 mg/m3) 

 See Appendix C (Aldehydes) 

OSHA PEL†: none 

Physical Description: Colorless liquid with a pungent odor. 

Measurement Methods 

(see Table 1): 

NIOSH 2532 

OSHA 64 

Chemical & Physical Properties: 

MW: 100.1 

BP: 212°F 

Sol: Miscible 

Fl.P: NA 

IP: ? 

Sp.Gr: 1.10 

VP: 17 mmHg 

FRZ: 7°F 

UEL: NA 

LEL: NA 

Noncombustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Strong oxidizers, strong bases [Note: Alkaline solutions of glutaraldehyde 

(i.e., activated glutaraldehyde) react with alcohol, ketones, amines, hydrazines & proteins.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, resp sys; derm, sens skin; cough, asthma; nau, vomit 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

Glycerin (mist) Formula: 

HOCH2CH(OH)CH2OH 

CAS#: 

56-81-5 

RTECS#: 

MA8050000 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: Glycerin (anhydrous); Glycerol; Glycyl alcohol; 1,2,3-Propanetriol; Trihydroxypropane 

Exposure Limits: 

NIOSH REL: See Appendix D 

OSHA PEL†: TWA 15 mg/m3

 (total) 

 TWA 5 mg/m3

 (resp) 

Measurement Methods 

(see Table 1): 

NIOSH 0500, 0600 

Physical Description: Clear, colorless, odorless, syrupy liquid or solid (below 64°F). 

[Note: The solid form melts above 64°F but the liquid form freezes at a much lower temperature.] 

Chemical & Physical Properties: 

MW: 92.1 

BP: 554°F (Decomposes) 

Sol: Miscible 

Fl.P: 320°F 

IP: ? 

Sp.Gr: 1.26 

VP(122°F): 0.003 mmHg 

MLT: 64°F 

UEL: ? 

LEL: ? 

Class IIIB Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Strong oxidizers (e.g., chromium trioxide, potassium chlorate, potassium 

permanganate) [Note: Hygroscopic (i.e., absorbs moisture from the air).] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con 

SY: Irrit eyes, skin, resp sys; head, nau, vomit; kidney inj 

TO: Eyes, skin, resp sys, kidneys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water wash 

Breath: Fresh air 

152
Glycidol Formula: 

C3H6O2

CAS#: 

556-52-5 

RTECS#: 

UB4375000 

IDLH: 

150 ppm 

Conversion: 1 ppm = 3.03 mg/m3 DOT: 

Synonyms/Trade Names: 2,3-Epoxy-1-propanol; Epoxypropyl alcohol; Glycide; Hydroxymethyl ethylene oxide; 

2-Hydroxymethyl oxiran; 3-Hydroxypropylene oxide 

Exposure Limits: 

NIOSH REL: TWA 25 ppm (75 mg/m3

) 

OSHA PEL†: TWA 50 ppm (150 mg/m3) 

Physical Description: Colorless liquid. 

Measurement Methods 

(see Table 1): 

NIOSH 1608 

OSHA 7 

Chemical & Physical 

Properties: 

MW: 74.1 

BP: 320°F (Decomposes) 

Sol: Miscible 

Fl.P: 162°F 

IP: ? 

Sp.Gr: 1.12 

VP(77°F): 0.9 mmHg 

FRZ: -49°F 

UEL: ? 

LEL: ? 

Class IIIA Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

150 ppm: Sa*/ScbaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, nitrates 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, nose, throat; narco 

TO: Eyes, skin, resp sys, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 

G 

Glycolonitrile Formula: 

HOCH2CN 

CAS#: 

107-16-4 

RTECS#: 

AM0350000 

IDLH: 

N.D. 

Conversion: 1 ppm = 2.34 mg/m3 DOT: 

Synonyms/Trade Names: Cyanomethanol, Formaldehyde cyanohydrin, Glycolic nitrile, Glyconitrile, 

Hydroxyacetonitrile 

Exposure Limits: 

NIOSH REL: C 2 ppm (5 mg/m3

) [15-minute] 

OSHA PEL: none 

Physical Description: Colorless, odorless, oily liquid. 

[Note: Forms cyanide in the body.] 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical 

Properties: 

MW: 57.1 

BP: 361°F (Decomposes) 

Sol: Soluble 

Fl.P: ? 

IP: ? 

Sp.Gr(66°F): 1.10 

VP(145°F): 1 mmHg 

FRZ: <-98°F 

UEL: ? 

LEL: ? 

Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

20 ppm: Sa 

50 ppm: Sa:Cf 

100 ppm: ScbaF/SaF 

250 ppm: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Traces of alkalis (promote violent polymerization) 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, resp sys; head, dizz, lass, conf, convuls; 

dysp; abdom pain, nau, vomit 

TO: Eyes, skin, resp sys, CNS, CVS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

153
G 

Grain dust (oat, wheat, barley) Formula: CAS#: RTECS#: 

MD7900000 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: None 

[Note: Grain dust consists of 60-75% organic materials (cereal grains) & 25-40% inorganic materials (soil), and 

includes fertilizers, pesticides & microorganisms.] 

Exposure Limits: 

NIOSH REL: TWA 4 mg/m3

OSHA PEL: TWA 10 mg/m3

Physical Description: Mixture of grain and all the other substances associated with 

its cultivation & harvesting. 

Measurement Methods 

(see Table 1): 

NIOSH 0500 

Chemical & Physical 

Properties: 

Properties depend upon the 

specific component of the grain 

dust. 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: None reported 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con 

SY: Irrit eyes, skin, upper resp sys; cough, dysp, wheez, asthma, bron, 

chronic obstructive pulm disease; conj, derm, rhinitis, grain fever 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Breath: Fresh air 

Graphite (natural) Formula: 

C 

CAS#: 

7782-42-5 

RTECS#: 

MD9659600 

IDLH: 

1250 mg/m3

Conversion: DOT: 

Synonyms/Trade Names: Black lead, Mineral carbon, Plumbago, Silver graphite, Stove black 

[Note: Also see specific listing for Graphite (synthetic).] 

Exposure Limits: 

NIOSH REL: TWA 2.5 mg/m3 (resp) 

OSHA PEL†: TWA 15 mppcf 

Physical Description: Steel gray to black, greasy feeling, odorless solid. 

Measurement Methods 

(see Table 1): 

NIOSH 0500, 0600 

Chemical & Physical 

Properties: 

MW: 12.0 

BP: Sublimes 

Sol: Insoluble 

Fl.P: NA 

IP: NA 

Sp.Gr: 2.0-2.25 

VP: 0 mmHg (approx) 

MLT: 6602°F (Sublimes) 

UEL: NA 

LEL: NA 

Combustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

12.5 mg/m3

: Qm 

25 mg/m3

: 95XQ/Sa 

62.5 mg/m3

: PaprHie/Sa:Cf 

125 mg/m3

: 100F/PaprTHie/SaT:Cf/ 

 ScbaF/SaF 

1250 mg/m3

: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Incompatibilities and Reactivities: Very strong oxidizers such as fluorine, chlorine trifluoride & potassium 

peroxide 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con 

SY: Cough, dysp, black sputum, decr pulm func, lung fib 

TO: Resp sys, CVS 

First Aid (see Table 6): 

Eye: Irr immed 

Breath: Fresh air 

154
Graphite (synthetic) Formula: 

C 

CAS#: 

7440-44-0 (synthetic) 

RTECS#: 

FF5250100 (synthetic) 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: Acheson graphite, Artificial graphite 

[Note: Also see specific listing for Graphite (natural).] 

Exposure Limits: 

NIOSH REL: See Appendix D 

OSHA PEL†: TWA 15 mg/m3

 (total) 

 TWA 5 mg/m3 (resp) 

Physical Description: Steel gray to black, greasy feeling, odorless solid. 

Measurement Methods 

(see Table 1): 

NIOSH 0500, 0600 

Chemical & Physical Properties: 

MW: 12.0 

BP: Sublimes 

Sol: Insoluble 

Fl.P: NA 

IP: NA 

Sp.Gr: 1.5-1.8 

VP: 0 mmHg (approx) 

MLT: 6602°F (Sublimes) 

UEL: NA 

LEL: NA 

Combustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Very strong oxidizers such as fluorine, chlorine trifluoride & potassium 

peroxide 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con 

SY: Cough, dysp, black sputum, decr pulm func, lung fib 

TO: Resp sys, CVS 

First Aid (see Table 6): 

Eye: Irr immed 

Breath: Fresh air 

G 

Gypsum Formula: 

CaSO4×2H2O 

CAS#: 

13397-24-5 

RTECS#: 

MG2360000 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: Calcium(II) sulfate dihydrate, Gypsum stone, Hydrated calcium sulfate, Mineral white 

[Note: Gypsum is the dihydrate form of calcium sulfate; Plaster of Paris is the hemihydrate form.] 

Exposure Limits: 

NIOSH REL: TWA 10 mg/m3

 (total) 

 TWA 5 mg/m3

 (resp) 

OSHA PEL: TWA 15 mg/m3

 (total) 

 TWA 5 mg/m3

 (resp) 

Physical Description: White or nearly white, odorless, crystalline solid. 

Measurement Methods 

(see Table 1): 

NIOSH 0500, 0600 

Chemical & Physical Properties: 

MW: 172.2 

BP: ? 

Sol(77°F): 0.2% 

Fl.P: NA 

IP: NA 

Sp.Gr: 2.32 

VP: 0 mmHg (approx) 

MLT: 262-325°F (Loses H2O) 

UEL: NA 

LEL: NA 

Noncombustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Aluminum (at high temperatures), diazomethane 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con 

SY: Irrit eyes, skin, muc memb, upper resp sys; cough, sneez, rhin 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Breath: Fresh air 

155
H 

Hafnium Formula: 

Hf 

CAS#: 

7440-58-6 

RTECS#: 

MG4600000 

IDLH: 

50 mg/m3

 (as Hf) 

Conversion: DOT: 1326 170 (powder, wet); 2545 135 (powder, dry) 

Synonyms/Trade Names: Celtium, Elemental hafnium, Hafnium metal 

Exposure Limits: 

NIOSH REL*: TWA 0.5 mg/m3 

OSHA PEL*: TWA 0.5 mg/m3

 

[*Note: The REL and PEL also apply to other hafnium compounds (as Hf).] 

Physical Description: Highly lustrous, ductile, grayish solid. 

Measurement Methods 

(see Table 1): 

NIOSH S194 (II-5) 

OSHA ID121 

Chemical & Physical Properties: 

MW: 178.5 

BP: 8316°F 

Sol: Insoluble 

Fl.P: NA 

IP: NA 

Sp.Gr: 13.31 

VP: 0 mmHg (approx) 

MLT: 4041°F 

UEL: NA 

LEL: NA 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam/Daily 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Explosive in powder form (either dry or with <25% water); finely divided 

powder can be ignited by static electricity or even SPONTANEOUSLY.

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

2.5 mg/m3

: Qm 

5 mg/m3

: 95XQ/Sa 

12.5 mg/m3

: Sa:Cf*/PaprHie* 

25 mg/m3

: 100F/SaT:Cf*/PaprTHie*/ 

 ScbaF/SaF 

50 mg/m3

: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, chlorine 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: In animals: irrit eyes, skin, muc memb; liver damage 

TO: Eyes, skin, muc memb, liver 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 

Halothane Formula: 

CF3CHBrCl 

CAS#: 

151-67-7 

RTECS#: 

KH6550000 

IDLH: 

N.D. 

Conversion: 1 ppm = 8.07 mg/m3 DOT: 

Synonyms/Trade Names: 1-Bromo-1-chloro-2,2,2-trifluoroethane; 2-Bromo-2-chloro-1,1,1-trifluoroethane; 

1,1,1-Trifluoro-2-bromo-2-chloroethane; 2,2,2-Trifluoro-1-bromo-1-chloroethane 

Exposure Limits: 

NIOSH REL*: C 2 ppm (16.2 mg/m3) [60-minute] 

 [*Note: REL for exposure to waste anesthetic gas.] 

OSHA PEL: none 

Measurement Methods 

(see Table 1): 

OSHA 29 

Physical Description: Clear, colorless liquid with a sweetish, pleasant odor. [inhalation anesthetic] 

Chemical & Physical Properties: 

MW: 197.4 

BP: 122°F 

Sol: 0.3% 

Fl.P: NA 

IP: ? 

Sp.Gr: 1.87 

VP: 243 mmHg 

FRZ: -180°F 

UEL: NA 

LEL: NA 

Noncombustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: May attack rubber & some plastics; sensitive to light. 

[Note: Light causes decomposition. May be stabilized with 0.01% thymol.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, resp sys; conf, drow, dizz, nau, analgesia, anes; card 

arrhy; liver, kidney damage; decr audio-visual performance; in animals: 

repro effects 

TO: Eyes, skin, resp sys, CVS, CNS, liver, kidneys, repro sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 

156
Formula: 

C10H5Cl7

CAS#: Heptachlor 

157

76-44-8 

RTECS#: 

PC0700000 

IDLH: 

Ca [35 mg/m3

] 

Conversion: DOT: 2761 151 (organochlorine pesticide, solid) 

Synonyms/Trade Names: 1,4,5,6,7,8,8-Heptachloro-3a,4,7,7a-tetrahydro-4,7-methanoindene 

Exposure Limits: 

NIOSH REL: Ca 

 TWA 0.5 mg/m3

 [skin] 

 See Appendix A 

OSHA PEL: TWA 0.5 mg/m3 [skin] 

Physical Description: White to light-tan crystals with a camphor-like odor. 

[insecticide] 

Measurement Methods 

(see Table 1): 

NIOSH S287 (II-5) 

OSHA PV2029 

Chemical & Physical 

Properties: 

MW: 373.4 

BP: 293°F (Decomposes) 

Sol: 0.0006% H 

Fl.P: NA 

IP: ? 

Sp.Gr: 1.66 

VP(77°F): 0.0003 mmHg 

MLT: 203°F 

UEL: NA 

LEL: NA 

Noncombustible Solid, but may 

be dissolved in flammable liquids. 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam/Daily 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Incompatibilities and Reactivities: Iron, rust 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

First Aid (see Table 6): 

SY: In animals: tremor, convuls; liver damage; [carc] 

TO: CNS,liver [in animals: liver cancer] 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

n-Heptane Formula: 

CH3[CH2]5CH3

CAS#: 

142-82-5 

RTECS#: 

MI7700000 

IDLH: 

750 ppm 

Conversion: 1 ppm = 4.10 mg/m3 DOT: 1206 128 

Synonyms/Trade Names: Heptane, normal-Heptane 

Exposure Limits: 

NIOSH REL: TWA 85 ppm (350 mg/m3

) 

 C 440 ppm (1800 mg/m3

) [15-minute] 

OSHA PEL†: TWA 500 ppm (2000 mg/m3

) 

Measurement Methods 

(see Table 1): 

NIOSH 1500 

Physical Description: Colorless liquid with a gasoline-like odor. 

OSHA 7 

Chemical & Physical 

Properties: 

MW: 100.2 

BP: 209°F 

Sol: 0.0003% 

Fl.P: 25°F 

IP: 9.90 eV 

Sp.Gr: 0.68 

VP(72°F): 40 mmHg 

FRZ: -131°F 

UEL: 6.7% 

LEL: 1.05% 

Class IB Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

750 ppm: CcrOv/GmFOv/PaprOv/ 

 Sa/ScbaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Dizz, stupor, inco; loss of appetite, nau; derm; chemical 

pneu (aspir liquid); uncon 

TO: Skin, resp sys, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 
H 

1-Heptanethiol Formula: 

CH3[CH2]6SH 

CAS#: 

1639-09-4 

RTECS#: 

MJ1400000 

IDLH: 

N.D. 

Conversion: 1 ppm = 5.41 mg/m3 DOT: 1228 131 

Synonyms/Trade Names: Heptyl mercaptan, n-Heptyl mercaptan 

Exposure Limits: 

NIOSH REL: C 0.5 ppm (2.7 mg/m3) [15-minute] 

OSHA PEL: none 

Physical Description: Colorless liquid with a strong odor. 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical 

Properties: 

MW: 132.3 

BP: 351°F 

Sol: Insoluble 

Fl.P: 115°F 

IP: ? 

Sp.Gr: 0.84 

VP: ? 

FRZ: -46°F 

UEL: ? 

LEL: ? 

Class II Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

5 ppm: CcrOv/Sa 

12.5 ppm: Sa:Cf/PaprOv 

25 ppm: CcrFOv/GmFOv/PaprTOv/ 

 ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Oxidizers, reducing agents, strong acids & bases, alkali metals 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, nose, throat; lass, cyan, incr respiration, nau, 

drow, head, vomit 

TO: Eyes, skin, resp sys, CNS, blood 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash 

Breath: Resp support 

Swallow: Medical attention immed 

Hexachlorobutadiene Formula: 

Cl2C=CClCCl=CCl2

CAS#: 

87-68-3 

RTECS#: 

EJ07000 

IDLH: 

Ca [N.D.] 

Conversion: 1 ppm = 10.66 mg/m3 DOT: 2279 151 

Synonyms/Trade Names: HCBD; Hexachloro-1,3-butadiene; 1,3-Hexachlorobutadiene; Perchlorobutadiene 

Exposure Limits: 

NIOSH REL: Ca 

 TWA 0.02 ppm (0.24 mg/m3

) [skin] 

 See Appendix A 

OSHA PEL†: none 

Physical Description: Clear, colorless liquid with a mild, turpentine-like odor. 

Measurement Methods 

(see Table 1): 

NIOSH 2543 

Chemical & Physical 

Properties: 

MW: 260.7 

BP: 419°F 

Sol: Insoluble 

Fl.P: ? 

IP: ? 

Sp.Gr: 1.55 

VP: 0.2 mmHg 

FRZ: -6°F 

UEL: ? 

LEL: ? 

Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: In animals: irrit eyes, skin, resp sys; kidney damage; [carc] 

TO: Eyes, skin, resp sys, kidneys [in animals: kidney tumors] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

158
Hexachlorocyclopentadiene Formula: 

C5Cl6

CAS#: 

77-47-4 

RTECS#: 

GY1225000 

IDLH: 

N.D. 

Conversion: 1 ppm = 11.16 mg/m3 DOT: 2646 151 

Synonyms/Trade Names: HCCPD; Hexachloro-1,3-cyclopentadiene; 1,2,3,4,5,5-Hexachloro-1,3-cyclopentadiene; 

Perchlorocyclopentadiene 

Exposure Limits: 

NIOSH REL: TWA 0.01 ppm (0.1 mg/m3

) 

OSHA PEL†: none 

Measurement Methods 

(see Table 1): 

NIOSH 2518 

Physical Description: Pale-yellow to amber-colored liquid with a pungent, unpleasant odor. 

[Note: A solid below 16°F.] 

Chemical & Physical Properties: 

MW: 272.8 

BP: 462°F 

Sol(77°F): 0.0002% (Reacts) 

Fl.P: NA 

IP: ? 

Sp.Gr: 1.71 

VP(77°F): 0.08 mmHg 

FRZ: 16°F 

UEL: NA 

LEL: NA 

Noncombustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Water, light 

[Note: Reacts slowly with water to form hydrochloric acid; will corrode iron & most metals in presence of moisture. 

Explosive hydrogen gas may collect in enclosed spaces in the presence of moisture.]

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, resp sys; eye, skin burns; lac; sneez, cough, dysp, 

salv, pulm edema; nau, vomit, diarr; in animals: liver, kidney inj 

TO: Eyes, skin, resp sys, liver, kidneys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

H 

Hexachloroethane Formula: 

Cl3CCCl3

CAS#: 

67-72-1 

RTECS#: 

KI4025000 

IDLH: 

Ca [300 ppm] 

Conversion: 1 ppm = 9.68 mg/m3 DOT: 

Synonyms/Trade Names: Carbon hexachloride, Ethane hexachloride, Perchloroethane 

Exposure Limits: 

NIOSH REL: Ca 

 TWA 1 ppm (10 mg/m3

) [skin] 

 See Appendix A 

 See Appendix C (Chloroethanes) 

OSHA PEL: TWA 1 ppm (10 mg/m3

) [skin] 

Physical Description: Colorless crystals with a camphor-like odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1003 

OSHA 7 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam/Daily 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Chemical & Physical 

Properties: 

MW: 236.7 

BP: Sublimes 

Sol(72°F): 0.005% 

Fl.P: NA 

IP: 11.22 eV 

Sp.Gr: 2.09 

VP: 0.2 mmHg 

MLT: 368°F (Sublimes) 

UEL: NA 

LEL: NA 

Noncombustible Solid 

Incompatibilities and Reactivities: Alkalis; metals such as zinc, cadmium, 

aluminum, hot iron & mercury 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, muc memb; in animals: kidney damage; [carc] 

TO: Eyes, skin, resp sys, kidneys [in animals: liver cancer] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

159
H 

Hexachloronaphthalene Formula: 

C10H2Cl6

CAS#: 

1335-87-1 

RTECS#: 

QJ7350000 

IDLH: 

2 mg/m3

Conversion: DOT: 

Synonyms/Trade Names: Halowax® 1014 

Exposure Limits: 

NIOSH REL: TWA 0.2 mg/m3 [skin] 

OSHA PEL: TWA 0.2 mg/m3

 [skin] 

Physical Description: White to light-yellow solid with an aromatic odor. 

Measurement Methods 

(see Table 1): 

NIOSH S100 (II-2) 

Chemical & Physical 

Properties: 

MW: 334.9 

BP: 650-730°F 

Sol: Insoluble 

Fl.P: NA 

IP: ? 

Sp.Gr: 1.78 

VP: <1 mmHg 

MLT: 279°F 

UEL: NA 

LEL: NA 

Noncombustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam/Daily 

Remove: When wet or contam 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

2 mg/m3

: Sa*/ScbaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Acne-form derm, nau, conf, jaun, coma 

TO: Skin, liver 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 

1-Hexadecanethiol Formula: 

CH3[CH2]15SH 

CAS#: 

2917-26-2 

RTECS#: IDLH: 

N.D. 

Conversion: 1 ppm = 10.59 mg/m3 DOT: 1228 131 (liquid) 

Synonyms/Trade Names: Cetyl mercaptan, Hexadecanethiol-1, n-Hexadecanethiol, Hexadecyl mercaptan 

Exposure Limits: 

NIOSH REL: C 0.5 ppm (5.3 mg/m3

) [15-minute] 

OSHA PEL: none 

Physical Description: Colorless liquid or solid (below 64-68°F) with a strong odor. 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical 

Properties: 

MW: 258.5 

BP: ? 

Sol: Insoluble 

Fl.P: 215°F 

IP: ? 

Sp.Gr: 0.85 

VP: 0.1 mmHg 

FRZ: 64-68°F 

UEL: ? 

LEL: ? 

Class IIIB Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

5 ppm: CcrOv/Sa 

12.5 ppm: Sa:Cf/PaprOv 

25 ppm: CcrFOv/GmFOv/PaprTOv/ 

 ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Oxidizers, strong acids & bases, alkali metals, reducing agents 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, resp sys; head, dizz, lass, cyan, nau, convuls

TO: Eyes, skin, resp sys, CNS, blood 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

160
Hexafluoroacetone Formula: 

(CF3)2CO 

CAS#: 

684-16-2 

RTECS#: 

UC2450000 

IDLH: 

N.D. 

Conversion: 1 ppm = 6.79 mg/m3 DOT: 2420 125 

Synonyms/Trade Names: Hexafluoro-2-propanone; 1,1,1,3,3,3-Hexafluoro-2-propanone; HFA; Perfluoroacetone 

Exposure Limits: 

NIOSH REL: TWA 0.1 ppm (0.7 mg/m3) [skin] 

OSHA PEL†: none 

Physical Description: Colorless gas with a musty odor. 

[Note: Shipped as a liquefied compressed gas.] 

Measurement Methods 

(see Table 1): 

None available 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact/Frostbite 

Eyes: Prevent eye contact/Frostbite 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Provide: Frostbite wash 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Chemical & Physical Properties: 

MW: 166.0 

BP: -18°F 

Sol: Reacts 

Fl.P: NA 

IP: 11.81 eV 

RGasD: 5.76 

VP: 5.8 atm 

FRZ: -188°F 

UEL: NA 

LEL: NA 

Nonflammable Gas, but highly reactive 

with water & other substances, 

releasing heat. 

Incompatibilities and Reactivities: Water, acids 

[Note: Hygroscopic (i.e., absorbs moisture from the air); reacts with 

moisture to form a highly acidic sesquihydrate.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Con 

SY: Irrit eyes, skin, muc memb, resp sys; pulm edema; liquid: 

frostbite; in animals: terato, repro effects; kidney inj 

TO: Eyes, skin, resp sys, kidneys, repro sys 

First Aid (see Table 6): 

Eye: Frostbite 

Skin: Frostbite 

Breath: Resp support 

H 

Hexamethylene diisocyanate Formula: 

OCN[CH2]6NCO 

CAS#: 

822-06-0 

RTECS#: 

MO1740000 

IDLH: 

N.D. 

Conversion: 1 ppm = 6.88 mg/m3 DOT: 2281 156 

Synonyms/Trade Names: 1,6-Diisocyanatohexane; HDI; Hexamethylene-1,6-diisocyanate; 

1,6-Hexamethylene diisocyanate; HMDI 

Exposure Limits: 

NIOSH REL: TWA 0.005 ppm (0.035 mg/m3

) 

 C 0.020 ppm (0.140 mg/m3

) [10-minute] 

OSHA PEL: none 

Measurement Methods 

(see Table 1): 

NIOSH 5521, 5522, 5525 

OSHA 42 

Physical Description: Clear, colorless to slightly yellow liquid with a sharp, pungent odor. 

Chemical & Physical 

Properties: 

MW: 168.2 

BP: 415°F 

Sol: Low (Reacts) 

Fl.P: 284°F 

IP:? 

Sp.Gr(77°F): 1.04 

VP(77°F): 0.05 mmHg 

FRZ: -89°F 

UEL: ? 

LEL: ? 

Class IIIB Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

0.05 ppm: Sa* 

0.125 ppm: Sa:Cf* 

0.25 ppm: ScbaF/SaF 

1 ppm: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Water, alcohols, strong bases, amines, carboxylic acids, organotin catalysts 

[Note: Reacts slowly with water to form carbon dioxide. Avoid heating above 392°F (polymerizes).] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, resp sys; cough, dysp, bron, wheez, pulm 

edema, asthma; corn damage, skin blisters 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

161
H 

Hexamethyl phosphoramide Formula: 

[(CH3)2N]3PO 

CAS#: 

680-31-9 

RTECS#: 

TD0875000 

IDLH: 

Ca [N.D.] 

Conversion: DOT: 

Synonyms/Trade Names: Hexamethylphosphoric triamide, Hexamethylphosphorotriamide, HMPA, 

Tris(dimethylamino)phosphine oxide 

Exposure Limits: 

NIOSH REL: Ca 

 See Appendix A 

OSHA PEL: none 

Physical Description: Clear, colorless liquid with an aromatic or mild, amine-like odor. 

[Note: A solid below 43°F.] 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical Properties: 

MW: 179.2 

BP: 451°F 

Sol: Miscible 

Fl.P: 220°F 

IP: ? 

Sp.Gr: 1.03 

VP: 0.03 mmHg 

FRZ: 43°F 

UEL: ? 

LEL: ? 

Class IIIB Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Oxidizers, strong acids, chemically-active metals (e.g., potassium, sodium, 

magnesium, zinc) 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, resp sys; dysp; abdom pain; [carc] 

TO: Eyes, skin, resp sys, CNS, GI tract [in animals: cancer of the 

nasal cavity] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

n-Hexane Formula: 

CH3[CH2]4CH3

CAS#: 

110-54-3 

RTECS#: 

MN9275000 

IDLH: 

1100 ppm [10%LEL]

Conversion: 1 ppm = 3.53 mg/m3 DOT: 1208 128 

Synonyms/Trade Names: Hexane, Hexyl hydride, normal-Hexane 

Exposure Limits: 

NIOSH REL: TWA 50 ppm (180 mg/m3

) 

OSHA PEL†: TWA 500 ppm (1800 mg/m3

) 

Physical Description: Colorless liquid with a gasoline-like odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1500, 3800 

OSHA 7 

Chemical & Physical 

Properties: 

MW: 86.2 

BP: 156°F 

Sol: 0.002% 

Fl.P: -7°F 

IP: 10.18 eV 

Sp.Gr: 0.66 

VP: 124 mmHg 

FRZ: -219°F 

UEL: 7.5% 

LEL: 1.1% 

Class IB Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

500 ppm: Sa* 

1100 ppm: Sa:Cf*/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, nose; nau, head; peri neur: numb extremities, 

musc weak; derm; dizz; chemical pneu (aspir liquid) 

TO: Eyes, skin, resp sys, CNS, PNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

162
Hexane isomers (excluding n-Hexane) Formula: 

C6H14

CAS#: RTECS#: IDLH: 

N.D. 

Conversion: 1 ppm = 3.53 mg/m3 DOT: 1208 128 

Synonyms/Trade Names: Diethylmethylmethane; Diisopropyl; 2,2-Dimethylbutane; 2,3-Dimethylbutane; 

Isohexane; 2-Methylpentane; 3-Methylpentane [Note: Also see specific listing for n-Hexane.] 

Exposure Limits: 

NIOSH REL: TWA 100 ppm (350 mg/m3

) 

 C 510 ppm (1800 mg/m3

) [15-minute] 

OSHA PEL†: none 

Physical Description: Clear liquids with mild, gasoline-like odors. 

[Note: Includes all the isomers of hexane except n-hexane.] 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical 

Properties: 

MW: 86.2 

BP: 122-145°F 

Sol: Insoluble 

Fl.P: -54 to 19°F 

IP: ? 

Sp.Gr: 0.65-0.66 

VP: ? 

FRZ: -245 to -148°F 

UEL: ? 

LEL: ? 

Class IB Flammable Liquids 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

1000 ppm: Sa* 

2500 ppm: Sa:Cf* 

5000 ppm: SaT:Cf*/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, resp sys; head, dizz; nau; chemical pneu 

(aspir liquid); derm 

TO: Eyes, skin, resp sys, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

H 

n-Hexanethiol Formula: 

CH3[CH2]5SH 

CAS#: 

111-31-9 

RTECS#: 

MO4550000 

IDLH: 

N.D. 

Conversion: 1 ppm = 4.83 mg/m3 DOT: 1228 131 

Synonyms/Trade Names: 1-Hexanethiol, Hexyl mercaptan, n-Hexyl mercaptan, n-Hexylthiol 

Exposure Limits: 

NIOSH REL: C 0.5 ppm (2.7 mg/m3

) [15-minute] 

OSHA PEL: none 

Physical Description: Colorless liquid with an unpleasant odor. 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical 

Properties: 

MW: 118.2 

BP: 304°F 

Sol: Insoluble 

Fl.P: 68°F 

IP: ? 

Sp.Gr: 0.84 

VP: ? 

FRZ: -113°F 

UEL: ? 

LEL: ? 

Class IB Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

5 ppm: CcrOv/Sa 

12.5 ppm: Sa:Cf/PaprOv 

25 ppm: CcrFOv/GmFOv/PaprTOv/ 

 ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Oxidizers, reducing agents, strong acids & bases, alkali metals 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, nose, throat; lass, cyan, incr respiration, nau, 

drow, head, vomit 

TO: Eyes, skin, resp sys, CNS, blood 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

163
H 

2-Hexanone Formula: 

CH3CO[CH2]3CH3

CAS#: 

591-78-6 

RTECS#: 

MP1400000 

IDLH: 

1600 ppm 

Conversion: 1 ppm = 4.10 mg/m3 DOT: 

Synonyms/Trade Names: Butyl methyl ketone, MBK, Methyl butyl ketone, Methyl n-butyl ketone 

Exposure Limits: 

NIOSH REL: TWA 1 ppm (4 mg/m3) 

OSHA PEL†: TWA 100 ppm (410 mg/m3

) 

Physical Description: Colorless liquid with an acetone-like odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1300, 2555 

OSHA PV2031 

Chemical & Physical 

Properties: 

MW: 100.2 

BP: 262°F 

Sol: 2% 

Fl.P: 77°F 

IP: 9.34 eV 

Sp.Gr: 0.81 

VP: 11 mmHg 

FRZ: -71°F 

UEL: 8% 

LEL: ? 

Class IC Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

10 ppm: Sa 

25 ppm: Sa:Cf 

50 ppm: SaT:Cf/ScbaF/SaF 

1600 ppm: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, nose; peri neur: lass, pares; derm; head, drow 

TO: Eyes, skin, resp sys, CNS, PNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

Hexone Formula: 

CH3COCH2CH(CH3)2

CAS#: 

108-10-1 

RTECS#: 

SA9275000 

IDLH: 

500 ppm 

Conversion: 1 ppm = 4.10 mg/m3 DOT: 1245 127 

Synonyms/Trade Names: Isobutyl methyl ketone, Methyl isobutyl ketone, 4-Methyl 2-pentanone, MIBK 

Exposure Limits: 

NIOSH REL: TWA 50 ppm (205 mg/m3

) 

 ST 75 ppm (300 mg/m3

) 

OSHA PEL†: TWA 100 ppm (410 mg/m3

) 

Physical Description: Colorless liquid with a pleasant odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1300, 2555 

OSHA 1004 

Chemical & Physical 

Properties: 

MW: 100.2 

BP: 242°F 

Sol: 2% 

Fl.P: 64°F 

IP: 9.30 eV 

Sp.Gr: 0.80 

VP: 16 mmHg 

FRZ: -120°F 

UEL(200°F): 8.0% 

LEL(200°F): 1.2% 

Class IB Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

500 ppm: CcrOv*/GmFOv/PaprTOv*/ 

 Sa*/ScbaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, potassium tert-butoxide 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, muc memb; head, narco, coma; derm; in 

animals: liver, kidney damage 

TO: Eyes, skin, resp sys, CNS, liver, kidneys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush prompt 

Breath: Resp support 

Swallow: Medical attention immed 

164
sec-Hexyl acetate Formula: 

C8H16O2

CAS#: 

108-84-9 

RTECS#: 

SA7525000 

IDLH: 

500 ppm 

Conversion: 1 ppm = 5.90 mg/m3 DOT: 1233 130 

Synonyms/Trade Names: 1,3-Dimethylbutyl acetate; Methylisoamyl acetate 

Exposure Limits: 

NIOSH REL: TWA 50 ppm (300 mg/m3) 

OSHA PEL: TWA 50 ppm (300 mg/m3

) 

Physical Description: Colorless liquid with a mild, pleasant, fruity odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1450 

OSHA 7 

Chemical & Physical 

Properties: 

MW: 144.2 

BP: 297°F 

Sol: 0.08% 

Fl.P: 113°F 

IP: ? 

Sp.Gr: 0.86 

VP: 3 mmHg 

FRZ: -83°F 

UEL: ? 

LEL: ? 

Class II Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

500 ppm: CcrOv*/GmFOv/PaprOv*/ 

 Sa*/ScbaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Nitrates; strong oxidizers, alkalis & acids 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, nose, throat; head; in animals: narco 

TO: Eyes, skin, resp sys, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush prompt 

Breath: Resp support 

Swallow: Medical attention immed 

H 

Hexylene glycol Formula: 

(CH3)2COHCH2CHOHCH3

CAS#: 

107-41-5 

RTECS#: 

SA0810000 

IDLH: 

N.D. 

Conversion: 1 ppm = 4.83 mg/m3 DOT: 

Synonyms/Trade Names: 2,4-Dihydroxy-2-methylpentane; 2-Methyl-2,4-pentanediol; 4-Methyl-2,4-pentanediol; 

2-Methylpentane-2,4-diol 

Exposure Limits: 

NIOSH REL: C 25 ppm (125 mg/m3

) 

OSHA PEL†: none 

Physical Description: Colorless liquid with a mild, sweetish odor. 

Measurement Methods 

(see Table 1): 

OSHA PV2101 

Chemical & Physical Properties: 

MW: 118.2 

BP: 388°F 

Sol: Miscible 

Fl.P: 209°F 

IP: ? 

Sp.Gr: 0.92 

VP: 0.05 mmHg 

FRZ: -58°F (Sets to glass) 

UEL(est): 7.4%

LEL(calc): 1.3%

Class IIIB Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Strong oxidizers, strong acids 

[Note: Hygroscopic (i.e., absorbs moisture from the air).] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, resp sys; head, dizz, nau, inco, CNS depres; 

derm, skin sens 

TO: Eyes, skin, resp sys, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

165
H 

Hydrazine Formula: 

H2NNH2

CAS#: 

302-01-2 

RTECS#: 

MU7175000 

IDLH: 

Ca [50 ppm] 

Conversion: 1 ppm = 1.31 mg/m3 DOT: 2029 132 (anhydrous); 3293 152 (≤ 37% solution); 

2030 153 (37-64% solution); 2029 132 (>64% solution) 

Synonyms/Trade Names: Diamine, Hydrazine (anhydrous), Hydrazine base 

Exposure Limits: 

NIOSH REL: Ca 

 C 0.03 ppm (0.04 mg/m3

) [2-hour] 

 See Appendix A 

OSHA PEL†: TWA 1 ppm (1.3 mg/m3

) [skin] 

Measurement Methods 

(see Table 1): 

NIOSH 3503 

OSHA 20, 108 

Physical Description: Colorless, fuming, oily liquid with an ammonia-like odor. [Note: A solid below 36°F.] 

Chemical & Physical Properties: 

MW: 32.1 

BP: 236°F 

Sol: Miscible 

Fl.P: 99°F 

IP: 8.93 eV 

Sp.Gr: 1.01 

VP: 10 mmHg 

FRZ: 36°F 

UEL: 98% 

LEL: 2.9% 

Class IC Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: ScbaE 

Incompatibilities and Reactivities: Oxidizers, hydrogen peroxide, nitric acid, metallic oxides, acids 

[Note: Can ignite SPONTANEOUSLY on contact with oxidizers or porous materials such as earth, wood & cloth.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, nose, throat; temporary blindness; dizz, nau; derm; 

eye, skin burns; in animals: bron, pulm edema; liver, kidney damage; 

convuls; [carc] 

TO: Eyes, skin, resp sys, CNS, liver, kidneys [in animals: tumors of the 

lungs, liver, blood vessels & intestine] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

Hydrogenated terphenyls Formula: 

(C6Hn)3

CAS#: 

61788-32-7 

RTECS#: 

WZ6535000 

IDLH: 

N.D. 

Conversion: 1 ppm = 12.19 mg/m3 (40% hydrogenated) DOT: 

Synonyms/Trade Names: Hydrogenated diphenylbenzenes, Hydrogenated phenylbiphenyls, 

Hydrogenated triphenyls [Note: Complex mixture of terphenyl isomers that are partially hydrogenated.] 

Exposure Limits: 

NIOSH REL: TWA 0.5 ppm (5 mg/m3) 

OSHA PEL†: none 

Measurement Methods 

(see Table 1): 

None available 

Physical Description: Clear, oily, pale-yellow liquids with a faint odor. [plasticizer/heat-transfer media] 

Chemical & Physical Properties: 

MW: 298 (40% hydrogenated) 

BP: 644°F (40% hydrogenated) 

Sol: Insoluble 

Fl.P: 315°F (40% hydrogenated) 

IP: ? 

Sp.Gr(77°F): 1.003-1.009 (40% hydrogenated) 

VP: ? 

FRZ: ? 

UEL: ? 

LEL: ? 

Class IIIB Combustible Liquids 

Personal Protection/Sanitation

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Respirator 

Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: None reported [Note: When heated, irritating vapors will be released.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, resp sys; liver, kidney, hemato damage 

TO: Eyes, skin, resp sys, liver, kidneys, hemato sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

166
Hydrogen bromide Formula: 

HBr 

CAS#: 

10035-10-6 

RTECS#: 

MW3850000 

IDLH: 

30 ppm 

Conversion: 1 ppm = 3.31 mg/m3 DOT: 1048 125 (anhydrous); 1788 154 (solution) 

Synonyms/Trade Names: Anhydrous hydrogen bromide; Aqueous hydrogen bromide (i.e., Hydrobromic acid) 

Exposure Limits: 

NIOSH REL: C 3 ppm (10 mg/m3) 

OSHA PEL†: TWA 3 ppm (10 mg/m3

) 

Physical Description: Colorless gas with a sharp, irritating odor. 

[Note: Shipped as a liquefied compressed gas. Often used in an aqueous solution.] 

Measurement Methods 

(see Table 1): 

NIOSH 7903 

OSHA ID165SG 

Chemical & Physical 

Properties: 

MW: 80.9 

BP: -88°F 

Sol: 49% 

Fl.P: NA 

IP: 11.62 eV 

RGasD: 2.81 

VP: 20 atm 

FRZ: -124°F 

UEL: NA 

LEL: NA 

Nonflammable Gas 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact (solution)/Frostbite 

Eyes: Prevent eye contact (solution)/Frostbite 

Wash skin: When contam (solution) 

Remove: When wet or contam (solution) 

Change: N.R. 

Provide: Eyewash (liquid) 

 Quick drench (solution) 

 Frostbite wash 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

30 ppm: Sa:Cf£/PaprAg£/GmFAg/ 

 ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFAg/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, strong caustics, moisture, copper, brass, zinc 

[Note: Hydrobromic acid is highly corrosive to most metals.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing (solution), Con 

SY: Irrit eyes, skin, nose, throat; solution: eye, skin burns; liquid: 

frostbite 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed (solution)/Frostbite 

Skin: Water flush immed (solution)/Frostbite 

Breath: Resp support 

Swallow: Medical attention immed (solution) 

H 

Hydrogen chloride Formula: 

HCl 

CAS#: 

7647-01-0 

RTECS#: 

MW4025000 

IDLH: 

50 ppm 

Conversion: 1 ppm = 1.49 mg/m3 DOT: 1050 125 (anhydrous); 1789 157 (solution) 

Synonyms/Trade Names: Anhydrous hydrogen chloride; 

Aqueous hydrogen chloride (i.e., Hydrochloric acid, Muriatic acid) [Note: Often used in an aqueous solution.] 

Exposure Limits: 

NIOSH REL: C 5 ppm (7 mg/m3

) 

OSHA PEL: C 5 ppm (7 mg/m3

) 

Physical Description: Colorless to slightly yellow gas with a pungent, irritating odor. 

[Note: Shipped as a liquefied compressed gas.] 

Measurement Methods 

(see Table 1): 

NIOSH 7903 

OSHA ID174SG 

Chemical & Physical 

Properties: 

MW: 36.5 

BP: -121°F 

Sol(86°F): 67% 

Fl.P: NA 

IP: 12.74 eV 

RGasD: 1.27 

VP: 40.5 atm 

FRZ: -174°F 

UEL: NA 

LEL: NA 

Nonflammable Gas 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact (solution)/Frostbite

Eyes: Prevent eye contact/Frostbite 

Wash skin: When contam (solution) 

Remove: When wet or contam (solution) 

Change: N.R. 

Provide: Eyewash (solution) 

 Quick drench (solution) 

 Frostbite wash 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

50 ppm: CcrS*/GmFS/PaprS*/ 

 Sa*/ScbaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFAg/ScbaE 

Incompatibilities and Reactivities: Hydroxides, amines, alkalis, copper, brass, zinc 

[Note: Hydrochloric acid is highly corrosive to most metals.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing (solution), Con 

SY: Irrit nose, throat, larynx; cough, choking; derm; solution: eye, 

skin burns; liquid: frostbite; in animals: lar spasm; pulm edema 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed (solution)/Frostbite 

Skin: Water flush immed (solution)/Frostbite 

Breath: Resp support 

Swallow: Medical attention immed (solution) 

167
H 

Hydrogen cyanide Formula: 

HCN 

CAS#: 

74-90-8 

RTECS#: 

MW6825000 

IDLH: 

50 ppm 

Conversion: 1 ppm = 1.10 mg/m3 DOT: 1051 117 (>20% solution); 1051 117 (anhydrous); 

1613 154 (20% solution) 

Synonyms/Trade Names: Formonitrile, Hydrocyanic acid, Prussic acid 

Exposure Limits: 

NIOSH REL: ST 4.7 ppm (5 mg/m3

) [skin] 

OSHA PEL†: TWA 10 ppm (11 mg/m3) [skin] 

Measurement Methods 

(see Table 1): 

NIOSH 6010, 6017 

Physical Description: Colorless or pale-blue liquid or gas (above 78°F) with a bitter, almond-like odor. 

[Note: Often used as a 96% solution in water.] 

Chemical & Physical Properties: 

MW: 27.0 

BP: 78°F (96%) 

Sol: Miscible 

Fl.P: 0°F (96%) 

IP: 13.60 eV 

Sp.Gr: 0.69 

VP: 630 mmHg 

FRZ: 7°F (96%) 

UEL: 40.0% 

LEL: 5.6% 

Class IA Flammable Liquid 

Flammable Gas 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

47 ppm: Sa 

50 ppm: Sa:Cf/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFS/ScbaE 

Incompatibilities and Reactivities: Amines, oxidizers, acids, sodium hydroxide, calcium hydroxide, sodium 

carbonate, caustics, ammonia [Note: Can polymerize at 122-140°F.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Asphy; lass, head, conf; nau, vomit; incr rate and depth of respiration 

or respiration slow and gasping; thyroid, blood changes 

TO: CNS, CVS, thyroid, blood 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

Hydrogen fluoride Formula: 

HF 

CAS#: 

7664-39-3 

RTECS#: 

MW7875000 

IDLH: 

30 ppm 

Conversion: 1 ppm = 0.82 mg/m3 DOT: 1052 125 (anhydrous); 1790 157 (solution) 

Synonyms/Trade Names: Anhydrous hydrogen fluoride; Aqueous hydrogen fluoride (i.e., Hydrofluoric acid); HF-A 

Exposure Limits: 

NIOSH REL: TWA 3 ppm (2.5 mg/m3

) 

 C 6 ppm (5 mg/m3

) [15-minute] 

OSHA PEL†: TWA 3 ppm 

Physical Description: Colorless gas or fuming liquid (below 67°F) with a strong, 

irritating odor. [Note: Shipped in cylinders.] 

Measurement Methods 

(see Table 1): 

NIOSH 3800, 7902, 7903, 

 7906 

OSHA ID110 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact (liquid) 

Eyes: Prevent eye contact (liquid) 

Wash skin: When contam (liquid) 

Remove: When wet or contam (liquid) 

Change: N.R. 

Provide: Eyewash (liquid) 

 Quick drench (liquid) 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

30 ppm: CcrS*/PaprS*/GmFS/ 

 Sa*/ScbaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFS/ScbaE 

Chemical & Physical 

Properties: 

MW: 20.0 

BP: 67°F 

Sol: Miscible 

Fl.P: NA 

IP: 15.98 eV 

RGasD: 0.69 

Sp.Gr: 1.00 (Liquid at 67°F) 

VP: 783 mmHg 

FRZ: -118°F 

UEL: NA 

LEL: NA 

Nonflammable Gas 

Incompatibilities and Reactivities: Metals, water or steam 

[Note: Corrosive to metals. Will attack glass and concrete.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs (liquid), Ing (solution), Con 

SY: Irrit eyes, skin, nose, throat; pulm edema; eye, skin burns; 

rhinitis; bron; bone changes 

TO: Eyes, skin, resp sys, bones 

First Aid (see Table 6): 

Eye: Irr immed (solution/liquid) 

Skin: Water flush immed (solution/liquid) 

Breath: Resp support 

Swallow: Medical attention immed (solution) 

168
Hydrogen peroxide Formula: 

H2O2

CAS#: 

7722-84-1 

RTECS#: 

MX0900000 

IDLH: 

75 ppm 

Conversion: 1 ppm = 1.39 mg/m3 DOT: 2984 140 (8-20% solution); 2014 140 (20-60% solution); 

2015 143 (>60% solution) 

Synonyms/Trade Names: High-strength hydrogen peroxide, Hydrogen dioxide, Hydrogen peroxide (aqueous), 

Hydroperoxide, Peroxide 

Exposure Limits: 

NIOSH REL: TWA 1 ppm (1.4 mg/m3) 

OSHA PEL: TWA 1 ppm (1.4 mg/m3

) 

Measurement Methods 

(see Table 1): 

OSHA ID126SG 

Physical Description: Colorless liquid with a slightly sharp odor. 

[Note: The pure compound is a crystalline solid below 12°F. Often used in an aqueous solution.] 

Chemical & Physical Properties: 

MW: 34.0 

BP: 286°F 

Sol: Miscible 

Fl.P: NA 

IP: 10.54 eV 

Sp.Gr: 1.39 

VP(86°F): 5 mmHg 

FRZ: 12°F 

UEL: NA 

LEL: NA 

Noncombustible Liquid, but a 

powerful oxidizer. 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

10 ppm: Sa* 

25 ppm: Sa:Cf* 

50 ppm: ScbaF/SaF 

75 ppm: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFS/ScbaE 

Incompatibilities and Reactivities: Oxidizable materials, iron, copper, brass, bronze, chromium, zinc, lead, silver, 

manganese [Note: Contact with combustible material may result in SPONTANEOUS combustion.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, nose, throat; corn ulcer; eryt, vesic skin; bleaching hair 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

H 

Hydrogen selenide Formula: 

H2Se 

CAS#: 

7783-07-5 

RTECS#: 

MX1050000 

IDLH: 

1 ppm 

Conversion: 1 ppm = 3.31 mg/m3 DOT: 2202 117 (anhydrous) 

Synonyms/Trade Names: Selenium dihydride, Selenium hydride 

Exposure Limits: 

NIOSH REL: TWA 0.05 ppm (0.2 mg/m3

) 

OSHA PEL: TWA 0.05 ppm (0.2 mg/m3

) 

Physical Description: Colorless gas with an odor resembling decayed horseradish. 

[Note: Shipped as a liquefied compressed gas.] 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical 

Properties: 

MW: 81.0 

BP: -42°F 

Sol(73°F): 0.9% 

Fl.P: NA (Gas) 

IP: 9.88 eV 

RGasD: 2.80 

VP(70°F): 9.5 atm 

FRZ: -87°F 

UEL: ? 

LEL: ? 

Flammable Gas 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Frostbite 

Eyes: Frostbite 

Wash skin: N.R. 

Remove: When wet (flamm) 

Change: N.R. 

Provide: Frostbite wash 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

0.5 ppm: Sa 

1 ppm: Sa:Cf*/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFS¿/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, acids, water, halogenated hydrocarbons 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con 

SY: Irrit eyes, nose, throat; nau, vomit, diarr; metallic taste, garlic 

breath; dizz, lass; liquid: frostbite; in animals: pneu; liver damage 

TO: Eyes, resp sys, liver 

First Aid (see Table 6): 

Eye: Frostbite 

Skin: Frostbite 

Breath: Resp support 

169
H 

Hydrogen sulfide Formula: 

H2S 

CAS#: 

7783-06-4 

RTECS#: 

MX1225000 

IDLH: 

100 ppm 

Conversion: 1 ppm = 1.40 mg/m3 DOT: 1053 117 

Synonyms/Trade Names: Hydrosulfuric acid, Sewer gas, Sulfuretted hydrogen 

Exposure Limits: 

NIOSH REL: C 10 ppm (15 mg/m3) [10-minute] 

OSHA PEL†: C 20 ppm 

 50 ppm [10-minute maximum peak] 

Physical Description: Colorless gas with a strong odor of rotten eggs. 

[Note: Sense of smell becomes rapidly fatigued & can NOT be relied upon to warn of 

the continuous presence of H2S. Shipped as a liquefied compressed gas.] 

Measurement Methods 

(see Table 1): 

NIOSH 6013 

OSHA ID141 

Chemical & Physical 

Properties: 

MW: 34.1 

BP: -77°F 

Sol: 0.4% 

Fl.P: NA (Gas) 

IP: 10.46 eV 

RGasD: 1.19 

VP: 17.6 atm 

FRZ: -122°F 

UEL: 44.0% 

LEL: 4.0% 

Flammable Gas 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Frostbite 

Eyes: Frostbite 

Wash skin: N.R. 

Remove: When wet (flamm) 

Change: N.R. 

Provide: Frostbite wash 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

100 ppm: PaprS/GmFS/Sa*/ScbaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFS/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, strong nitric acid, metals 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con 

SY: Irrit eyes, resp sys; apnea, coma, convuls; conj, eye pain, lac, 

photo, corn vesic; dizz, head, lass, irrity, insom; GI dist; liquid: frostbite 

TO: Eyes, resp sys, CNS 

First Aid (see Table 6): 

Eye: Frostbite 

Skin: Frostbite 

Breath: Resp support 

Hydroquinone Formula: 

C6H4(OH)2

CAS#: 

123-31-9 

RTECS#: 

MX3500000 

IDLH: 

50 mg/m3

Conversion: DOT: 2662 153 

Synonyms/Trade Names: p-Benzenediol; 1,4-Benzenediol; Dihydroxybenzene; 1,4-Dihydroxybenzene; Quinol 

Exposure Limits: 

NIOSH REL: C 2 mg/m3

 [15-minute] 

OSHA PEL: TWA 2 mg/m3

Physical Description: Light-tan, light-gray, or colorless crystals. 

Measurement Methods 

(see Table 1): 

NIOSH 5004 

OSHA PV2094 

Chemical & Physical Properties: 

MW: 110.1 

BP: 545°F 

Sol: 7% 

Fl.P: 329°F (Molten) 

IP: 7.95 eV 

Sp.Gr: 1.33 

VP: 0.00001 mmHg 

MLT: 338°F 

UEL: ? 

LEL: ? 

Combustible Solid; dust cloud may 

explode if ignited in an enclosed area. 

Personal Protection/Sanitation

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash (>7%) 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

50 mg/m3

: PaprHie£/100F/SaT:Cf£/ 

 ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, alkalis 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes; conj; kera; CNS excitement; colored urine, nau, dizz, 

suffocation, rapid breath; musc twitch, delirium; collapse; skin irrit, sens, derm

TO: Eyes, skin, resp sys, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush 

Breath: Resp support 

Swallow: Medical attention immed 

170
2-Hydroxypropyl acrylate Formula: 

CH2=CHCOOCH2CHOHCH3

CAS#: 

999-61-1 

RTECS#: 

AT1925000 

IDLH: 

N.D. 

Conversion: 1 ppm = 5.33 mg/m3 DOT: 

Synonyms/Trade Names: HPA, β-Hydroxypropyl acrylate, Propylene glycol monoacrylate 

Exposure Limits: 

NIOSH REL: TWA 0.5 ppm (3 mg/m3

) [skin] 

OSHA PEL†: none 

Physical Description: Clear to light-yellow liquid wiith a sweetish, solvent odor. 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical Properties: 

MW: 130.2 

BP: 376°F 

Sol: ? 

Fl.P: 149°F 

IP: ? 

Sp.Gr: 1.05 

VP: ? 

FRZ: ? 

UEL: ? 

LEL: 1.8% 

Class IIIA Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Water [Note: Can become unstable at high temperatures & pressures or may 

react with water with some release of energy, but not violently.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, resp sys; eye, skin burns; cough, dysp 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

I 

Indene Formula: 

C9H8

CAS#: 

95-13-6 

RTECS#: 

NK8225000 

IDLH: 

N.D. 

Conversion: 1 ppm = 4.75 mg/m3 DOT: 

Synonyms/Trade Names: Indonaphthene 

Exposure Limits: 

NIOSH REL: TWA 10 ppm (45 mg/m3) 

OSHA PEL†: none 

Physical Description: Colorless liquid. [Note: A solid below 29°F.] 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical Properties: 

MW: 116.2 

BP: 359°F 

Sol: Insoluble 

Fl.P: 173°F 

IP: 8.81 eV 

Sp.Gr: 0.997 

VP: ? 

FRZ: 29°F 

UEL: ? 

LEL: ? 

Class IIIA Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: Daily 

Remove: When wet or contam 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: None reported 

[Note: Polymerizes & oxidizes on standing. It has exploded during nitration with (H2SO4 + HNO3).] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: In animals: irrit eyes, skin, muc memb; derm, skin sens; 

chemical pneu (aspir liquid); liver, kidney, spleen inj 

TO: Eyes, skin, resp sys, liver, kidneys, spleen 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash 

Breath: Resp support 

Swallow: Medical attention immed 

171
I 

Indium Formula: 

In 

CAS#: 

7440-74-6 

RTECS#: 

NL1050000 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: Indium metal 

Exposure Limits: 

NIOSH REL*: TWA 0.1 mg/m3 

 [*Note: The REL also applies to other indium compounds (as In).] 

OSHA PEL†: none 

Physical Description: Ductile, shiny, silver-white metal that is softer than lead. 

Measurement Methods 

(see Table 1): 

NIOSH 7303, P&CAM173 (II-5) 

OSHA ID121 

Chemical & Physical Properties: 

MW: 114.8 

BP: 3767°F 

Sol: Insoluble 

Fl.P: NA 

IP: NA 

Sp.Gr: 7.31 

VP: 0 mmHg (approx) 

MLT: 314°F 

UEL: NA 

LEL: NA 

Noncombustible Solid in bulk form, but 

may ignite in powdered or dust form. 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: (Dinitrogen tetraoxide + acetonitrile), mercury(II) bromide (at 662°F), 

sulfur (mixtures ignite when heated) [Note: oxidizes readily at higher temperatures.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, resp sys; possible liver, kidney, heart, blood 

effects; pulm edema 

TO: Eyes, skin, resp sys, liver, kidneys, heart, blood 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash 

Breath: Resp support 

Swallow: Medical attention immed 

Iodine Formula: 

I2

CAS#: 

7553-56-2 

RTECS#: 

NN1575000 

IDLH: 

2 ppm 

Conversion: 1 ppm = 10.38 mg/m3 DOT: 

Synonyms/Trade Names: Iodine crystals, Molecular iodine 

Exposure Limits: 

NIOSH REL: C 0.1 ppm (1 mg/m3

) 

OSHA PEL: C 0.1 ppm (1 mg/m3

) 

Physical Description: Violet solid with a sharp, characteristic odor. 

Measurement Methods 

(see Table 1): 

NIOSH 6005 

OSHA ID212 

Chemical & Physical 

Properties: 

MW: 253.8 

BP: 365°F 

Sol: 0.01% 

Fl.P: NA 

IP: 9.31 eV 

Sp.Gr: 4.93 

VP(77°F): 0.3 mmHg 

MLT: 236°F 

UEL: NA 

LEL: NA 

Noncombustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash (>7%) 

 Quick drench (>7%) 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

1 ppm: Sa* 

2 ppm: Sa:Cf*/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFAg100/ScbaE 

Incompatibilities and Reactivities: Ammonia, acetylene, acetaldehyde, powdered aluminum, active metals, 

liquid chlorine 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, nose; lac; head; chest tight; skin burns, rash; 

cutaneous hypersensitivity 

TO: Eyes, skin, resp sys, CNS, CVS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

172
Iodoform Formula: 

CHI3

CAS#: 

75-47-8 

RTECS#: 

PB7000000 

IDLH: 

N.D. 

Conversion: 1 ppm = 16.10 mg/m3 DOT: 

Synonyms/Trade Names: Triiodomethane 

Exposure Limits: 

NIOSH REL: TWA 0.6 ppm (10 mg/m3) 

OSHA PEL†: none 

Physical Description: Yellow to greenish-yellow powder or crystalline solid with a 

pungent, disagreeable odor. [antiseptic for external use] 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical Properties: 

MW: 393.7 

BP: 410°F (Decomposes) 

Sol: 0.01% 

Fl.P: NA 

IP: ? 

Sp.Gr: 4.01 

VP: ? 

MLT: 246°F 

UEL: NA 

LEL: NA 

Noncombustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Strong oxidizers, lithium, metallic salts (e.g., mercuric oxide, silver nitrate), 

strong bases, calomel, tannin 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin; lass, dizz, nau, inco, CNS depres; dysp; liver, 

kidney, heart damage; vis dist 

TO: Eyes, skin, resp sys, liver, kidneys, heart 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

I 

Iron oxide dust and fume (as Fe) Formula: 

Fe2O3

CAS#: 

1309-37-1 

RTECS#: 

NO7400000 

NO7525000 (fume) 

IDLH: 

2500 mg/m3

 (as Fe) 

Conversion: DOT: 1376 135 (spent) 

Synonyms/Trade Names: Ferric oxide, Iron(III) oxide 

Exposure Limits: 

NIOSH REL: TWA 5 mg/m3

OSHA PEL: TWA 10 mg/m3

Physical Description: Reddish-brown solid. 

[Note: Exposure to fume may occur during the arc-welding of iron.] 

Measurement Methods 

(see Table 1): 

NIOSH 7300, 7301, 7303, 9102 

OSHA ID121, ID125G 

Chemical & Physical 

Properties: 

MW: 159.7 

BP: ? 

Sol: Insoluble 

Fl.P: NA 

IP: NA 

Sp.Gr: 5.24 

VP: 0 mmHg (approx) 

MLT: 2664°F 

UEL: NA 

LEL: NA 

Noncombustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

50 mg/m3

: 95XQ/Sa 

125 mg/m3

: Sa:Cf/PaprHie 

250 mg/m3: 100F/SaT:Cf/PaprTHie/ 

 ScbaF/SaF 

2500 mg/m3

: Sa:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Incompatibilities and Reactivities: Calcium hypochlorite 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh 

SY: Benign pneumoconiosis with X-ray shadows 

indistinguishable from fibrotic pneumoconiosis (siderosis) 

TO: Resp sys 

First Aid (see Table 6): 

Breath: Resp support 

173
I 

Iron pentacarbonyl (as Fe) Formula: 

Fe(CO)5

CAS#: 

13463-40-6 

RTECS#: 

NO4900000 

IDLH: 

N.D. 

Conversion: 1 ppm = 2.28 mg/m3 (as Fe) DOT: 1994 131 

Synonyms/Trade Names: Iron carbonyl, Pentacarbonyl iron 

Exposure Limits: 

NIOSH REL: TWA 0.1 ppm (0.23 mg/m3) 

 ST 0.2 ppm (0.45 mg/m3) 

OSHA PEL†: none 

Physical Description: Colorless to yellow to dark-red, oily liquid. 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical Properties: 

MW: 195.9 

BP(749 mmHg): 217°F 

Sol: Insoluble 

Fl.P: 5°F 

IP: ? 

Sp.Gr: 1.46-1.52 

VP(87°F): 40 mmHg 

FRZ: -6°F 

UEL: ? 

LEL: ? 

Class IB Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Provide: Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Oxidizers, nitrogen oxide, (zinc + cobalt halides) 

[Note: Pyrophoric (i.e., ignites spontaneously in air). Decomposed by light or air, releasing carbon monoxide.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, muc memb, resp sys; head, dizz, nau, vomit; fever, cyan, 

cough, dysp; liver, kidney, lung inj; degenerative changes in CNS 

TO: Eyes, resp sys, CNS, liver, kidneys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

Iron salts (soluble, as Fe) Formula: CAS#: RTECS#: IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: FeSO4: Ferrous sulfate, Iron(II) sulfate; FeCl2: Ferrous chloride, Iron(II) chloride; 

Fe(NO3)3: Ferric nitrate, Iron(III) nitrate; Fe(SO4)3: Ferric sulfate, Iron(III) sulfate; FeCl3: Ferric chloride, 

Iron (III) chloride 

Exposure Limits: 

NIOSH REL: TWA 1 mg/m3

OSHA PEL†: none 

Physical Description: Appearance and odor vary depending upon the specific 

soluble iron salt. 

Measurement Methods 

(see Table 1): 

NIOSH 7300, 7301, 7303, 9102 

OSHA ID121, ID125G 

Chemical & Physical Properties: 

Properties vary depending upon the 

specific soluble iron salt. 

Noncombustible Solids 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: Daily 

Remove: N.R. 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Varies 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, muc memb; abdom pain, diarr, vomit; 

possible liver damage 

TO: Eyes, skin, resp sys, liver, GI tract 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash 

Breath: Resp support 

Swallow: Medical attention immed 

174
Isoamyl acetate Formula: 

CH3COOCH2CH2CH(CH3)2

CAS#: 

123-92-2 

RTECS#: 

NS9800000 

IDLH: 

1000 ppm 

Conversion: 1 ppm = 5.33 mg/m3 DOT: 1104 129 

Synonyms/Trade Names: Banana oil, Isopentyl acetate, 3-Methyl-1-butanol acetate, 

3-Methylbutyl ester of acetic acid, 3-Methylbutyl ethanoate 

Exposure Limits: 

NIOSH REL: TWA 100 ppm (525 mg/m3

) 

OSHA PEL: TWA 100 ppm (525 mg/m3) 

Physical Description: Colorless liquid with a banana-like odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1450 

OSHA 7 

Chemical & Physical Properties: 

MW: 130.2 

BP: 288°F 

Sol: 0.3% 

Fl.P: 77°F 

IP: ? 

Sp.Gr: 0.87 

VP: 4 mmHg 

FRZ: -109°F 

UEL: 7.5% 

LEL(212°F): 1.0% 

Class IC Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

1000 ppm: CcrOv/PaprOv/GmFOv/ 

 Sa/ScbaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Nitrates; strong oxidizers, alkalis & acids 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, nose, throat; derm; in animals: narco 

TO: Eyes, skin, resp sys, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush prompt 

Breath: Resp support 

Swallow: Medical attention immed 

I 

Isoamyl alcohol (primary) Formula: 

(CH3)2CHCH2CH2OH 

CAS#: 

123-51-3 

RTECS#: 

EL5425000 

IDLH: 

500 ppm 

Conversion: 1 ppm = 3.61 mg/m3 DOT: 1105 129 

Synonyms/Trade Names: Fermentation amyl alcohol, Fusel oil, Isobutyl carbinol, Isopentyl alcohol, 

3-Methyl-1-butanol, Primary isoamyl alcohol 

Exposure Limits: 

NIOSH REL: TWA 100 ppm (360 mg/m3

) 

 ST 125 ppm (450 mg/m3

) 

OSHA PEL†: TWA 100 ppm (360 mg/m3

) 

Physical Description: Colorless liquid with a disagreeable odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1402, 1405 

Chemical & Physical 

Properties: 

MW: 88.2 

BP: 270°F 

Sol(57°F): 2% 

Fl.P: 109°F 

IP: ? 

Sp.Gr(57°F): 0.81 

VP: 28 mmHg 

FRZ: -179°F 

UEL(212°F): 9.0% 

LEL: 1.2% 

Class II Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

500 ppm: Sa:Cf£/CcrFOv/GmFOv/ 

 PaprOv£/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, nose, throat; head, dizz; cough, dysp, nau, 

vomit, diarr; skin cracking; in animals: narco 

TO: Eyes, skin, resp sys, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush prompt 

Breath: Resp support 

Swallow: Medical attention immed 

175
Isoamyl alcohol (secondary) Formula: 

(CH3)2CHCH(OH)CH3

CAS#: RTECS#: 

6032-29-7 SA4900000 

IDLH: 

500 ppm 

Conversion: 1 ppm = 3.61 mg/m3 DOT: 1105 129 

Synonyms/Trade Names: 3-Methyl-2-butanol, Secondary isoamyl alcohol 

Exposure Limits: 

176

I 

NIOSH REL: TWA 100 ppm (360 mg/m3) 

 ST 125 ppm (450 mg/m3) 

OSHA PEL†: TWA 100 ppm (360 mg/m3

) 

Measurement Methods 

(see Table 1): 

Physical Description: Colorless liquid with a disagreeable odor. 

NIOSH 1402 

Chemical & Physical 

Properties: 

MW: 88.2 

BP: 234°F 

Sol: ? 

Fl.P(oc): 95°F 

IP: ? 

Sp.Gr: 0.82 

VP: 1 mmHg 

FRZ: ? 

UEL: ? 

LEL: ? 

Class IC Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

500 ppm: Sa:Cf£/CcrFOv/GmFOv/ 

 PaprOv£/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, nose, throat; head, dizz; cough, dysp, nau, 

vomit, diarr; skin cracking; in animals: narco 

TO: Eyes, skin, resp sys, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush prompt 

Breath: Resp support 

Swallow: Medical attention immed 

Isobutane Formula: 

CH3CH(CH3)2

CAS#: 

75-28-5 

RTECS#: 

TZ4300000 

IDLH: 

N.D. 

Conversion: 1 ppm = 2.38 mg/m3 DOT: 1075 115; 1969 115 

Synonyms/Trade Names: 2-Methylpropane [Note: Also see specific listing for n-Butane.] 

Exposure Limits: 

NIOSH REL: TWA 800 ppm (1900 mg/m3

) 

OSHA PEL†: none 

Physical Description: Colorless gas with a gasoline-like or natural gas odor. 

[Note: Shipped as a liquefied compressed gas. A liquid below 11°F.] 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical Properties: 

MW: 58.1 

BP: 11°F 

Sol: Slight 

Fl.P: NA (Gas) 

IP: 10.74 eV 

RGasD: 2.06 

VP(70°F): 3.1 atm 

FRZ: -255°F 

UEL: 8.4% 

LEL: 1.6% 

Flammable Gas 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Frostbite 

Eyes: Frostbite 

Wash skin: N.R. 

Remove: When wet (flamm) 

Change: N.R. 

Provide: Frostbite wash 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Strong oxidizers (e.g., nitrates & perchlorates), chlorine, fluorine, 

(nickel carbonyl + oxygen) 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con (liquid) 

SY: Drow, narco, asphy; liquid: frostbite 

TO: CNS 

First Aid (see Table 6): 

Eye: Frostbite 

Skin: Frostbite 

Breath: Resp support 
Isobutyl acetate Formula: 

CH3COOCH2CH(CH3)2

CAS#: 

110-19-0 

RTECS#: 

AI4025000

IDLH: 

1300 ppm [10%LEL] 

Conversion: 1 ppm = 4.75 mg/m3 DOT: 1213 129 

Synonyms/Trade Names: Isobutyl ester of acetic acid, 2-Methylpropyl acetate, 2-Methylpropyl ester of acetic acid, 

β-Methylpropyl ethanoate 

Exposure Limits: 

NIOSH REL: TWA 150 ppm (700 mg/m3

) 

OSHA PEL: TWA 150 ppm (700 mg/m3

) 

Physical Description: Colorless liquid with a fruity, floral odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1450 

OSHA 7 

Chemical & Physical 

Properties: 

MW: 116.2 

BP: 243°F 

Sol(77°F): 0.6% 

Fl.P: 64°F 

IP: 9.97 eV 

Sp.Gr: 0.87 

VP: 13 mmHg 

FRZ: -145°F 

UEL: 10.5% 

LEL: 1.3% 

Class IB Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

1300 ppm: Sa:Cf£/CcrFOv/GmFOv/ 

 PaprOv£/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Nitrates; strong oxidizers, alkalis & acids 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, upper resp sys; head, drow, anes; in animals: narco

TO: Eyes, skin, resp sys, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush prompt 

Breath: Resp support 

Swallow: Medical attention immed 

I 

Isobutyl alcohol Formula: 

(CH3)2CHCH2OH 

CAS#: 

78-83-1 

RTECS#: 

NP9625000 

IDLH: 

1600 ppm 

Conversion: 1 ppm = 3.03 mg/m3 DOT: 1212 129 

Synonyms/Trade Names: IBA, Isobutanol, Isopropylcarbinol, 2-Methyl-1-propanol 

Exposure Limits: 

NIOSH REL: TWA 50 ppm (150 mg/m3

) 

OSHA PEL†: TWA 100 ppm (300 mg/m3) 

Physical Description: Colorless, oily liquid with a sweet, musty odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1401, 1405 

OSHA 7 

Chemical & Physical 

Properties: 

MW: 74.1 

BP: 227°F 

Sol: 10% 

Fl.P: 82°F 

IP: 10.12 eV 

Sp.Gr: 0.80 

VP: 9 mmHg 

FRZ: -162°F 

UEL(202°F): 10.6% 

LEL(123°F): 1.7% 

Class IC Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

500 ppm: CcrOv*/Sa* 

1250 ppm: Sa:Cf*/PaprOv* 

1600 ppm: CcrFOv/GmFOv/PaprTOv*/ 

 ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, throat; head, drow; skin cracking; in animals: narco 

TO: Eyes, skin, resp sys, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush prompt 

Breath: Resp support 

Swallow: Medical attention immed 

177
I 

Isobutyronitrile Formula: 

(CH3)2CHCN 

CAS#: 

78-82-0 

RTECS#: 

TZ4900000 

IDLH: 

N.D. 

Conversion: 1 ppm = 2.83 mg/m3 DOT: 2284 131 

Synonyms/Trade Names: Isopropyl cyanide, 2-Methylpropanenitrile, 2-Methylpropionitrile 

Exposure Limits: 

NIOSH REL: TWA 8 ppm (22 mg/m3) 

OSHA PEL: none 

Physical Description: Colorless liquid with an almond-like odor. 

[Note: Forms cyanide in the body.] 

Measurement Methods 

(see Table 1): 

NIOSH 1606 (adapt) 

Chemical & Physical 

Properties: 

MW: 69.1 

BP: 219°F 

Sol: Slight 

Fl.P: 47°F 

IP: ? 

Sp.Gr: 0.76 

VP(130°F): 100 mmHg 

FRZ: -97°F 

UEL: ? 

LEL: ? 

Class IB Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

80 ppm: CcrOv/Sa 

200 ppm: Sa:Cf/PaprOv 

400 ppm: CcrFOv/GmFOv/PaprTOv/ 

 ScbaF/SaF 

1000 ppm: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Oxidizers, reducing agents, strong acids & bases 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, nose, throat; head, dizz, lass, conf, convuls; 

dysp; abdom pain, nau, vomit 

TO: Eyes, skin, resp sys, CNS, CVS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

Isooctyl alcohol Formula: 

C7H15CH2OH 

CAS#: 

26952-21-6 

RTECS#: 

NS7700000 

IDLH: 

N.D. 

Conversion: 1 ppm = 5.33 mg/m3 DOT: 

Synonyms/Trade Names: Isooctanol, Oxooctyl alcohol [Note: A mixture of closely related isomeric, primary 

alcohols with branched chains such as 2-Ethylhexanol, CH3(CH2)3CH(CH2CH3)CH2OH.] 

Exposure Limits: 

NIOSH REL: TWA 50 ppm (270 mg/m3

) [skin] 

OSHA PEL†: none 

Physical Description: Clear, colorless liquid. 

Measurement Methods 

(see Table 1): 

OSHA PV2033 

Chemical & Physical Properties: 

MW: 130.3 

BP: 367°F 

Sol: Insoluble 

Fl.P(oc): 180°F 

IP: ? 

Sp.Gr: 0.83 

VP: 0.4 mmHg 

FRZ: <-105°F 

UEL(est.): 5.7% 

LEL(calc.): 0.9% 

Class IIIA Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam/Daily 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: None reported 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, nose, throat; eye, skin burns 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

178
179

I 

Isophorone Formula: 

C9H14O 

CAS#: 

78-59-1 

RTECS#: 

GW7700000 

IDLH: 

200 ppm 

Conversion: 1 ppm = 5.65 mg/m3 DOT: 1993 128 (combustible liquid, n.o.s.) 

Synonyms/Trade Names: Isoacetophorone; 3,5,5-Trimethyl-2-cyclohexenone; 

3,5,5-Trimethyl-2-cyclo-hexen-1-one 

Exposure Limits: 

NIOSH REL: TWA 4 ppm (23 mg/m3

) 

OSHA PEL†: TWA 25 ppm (140 mg/m3

) 

Physical Description: Colorless to white liquid with a peppermint-like odor. 

Measurement Methods 

(see Table 1): 

NIOSH 2508, 2556 

OSHA 7 

Chemical & Physical 

Properties: 

MW: 138.2 

BP: 419°F 

Sol: 1% 

Fl.P: 184°F 

IP: 9.07 eV 

Sp.Gr: 0.92 

VP: 0.3 mmHg 

FRZ: 17°F 

UEL: 3.8% 

LEL: 0.8% 

Class IIIA Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

40 ppm: CcrOv*/Sa* 

100 ppm: Sa:Cf*/PaprOv* 

200 ppm: CcrFOv/GmFOv/PaprTOv*/ 

 SaT:Cf*/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Oxidizers, strong alkalis, amines 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, nose, throat; head, nau, dizz, lass, mal, narco; 

derm; in animals: kidney, liver damage 

TO: Eyes, skin, resp sys, CNS, liver, kidneys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 

Isophorone diisocyanate Formula: 

C12H18N2O2

CAS#: 

4098-71-9 

RTECS#: 

NQ9370000 

IDLH: 

N.D. 

Conversion: 1 ppm = 9.09 mg/m3 DOT: 2290 156 

Synonyms/Trade Names: IPDI; 3-Isocyanatomethyl-3,5,5-trimethylcyclohexyl-isocyanate; 

Isophorone diamine diisocyanate 

Exposure Limits: 

NIOSH REL: TWA 0.005 ppm (0.045 mg/m3

) [skin] 

 ST 0.02 ppm (0.180 mg/m3

) 

OSHA PEL†: none 

Physical Description: Colorless to slightly yellow liquid with a pungent odor. 

Measurement Methods 

(see Table 1): 

NIOSH 5525 

OSHA PV2034 

Chemical & Physical 

Properties: 

MW: 222.3 

BP: ? 

Sol: Decomposes 

Fl.P: 311°F 

IP: ? 

Sp.Gr: 1.06 

VP: 0.0003 mmHg 

FRZ: -76°F 

UEL: ? 

LEL: ? 

Class IIIB Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Provide: Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

0.05 ppm: Sa* 

0.125 ppm: Sa:Cf* 

0.25 ppm: ScbaF/SaF 

1 ppm: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Water, alcohols, phenols, amines, mercaptans, amides, urethanes, ureas 

[Note: Reacts with water to form carbon dioxide.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, resp sys; chest tight, dysp, cough, sore 

throat; bron, wheez, pulm edema; possible resp sens, asthma 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 
180

I 

2-Isopropoxyethanol Formula: 

(CH3)2CHOCH2CH2OH 

CAS#: 

109-59-1 

RTECS#: 

KL5075000 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: Ethylene glycol isopropyl ether, β-Hydroxyethyl isopropyl ether, Isopropyl Cellosolve®, 

Isopropyl glycol 

Exposure Limits: 

NIOSH REL: See Appendix D 

OSHA PEL†: none 

Physical Description: Colorless liquid with a mild, ethereal odor. 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical Properties: 

MW: 104.2 

BP: 283°F 

Sol: Miscible 

Fl.P(oc): 92°F 

IP: ? 

Sp.Gr: 0.90 

VP: 3 mmHg 

FRZ: ? 

UEL: ? 

LEL: ? 

Class IC Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: In animals: irrit eyes, skin; hema, anemia, pulm edema 

TO: Eyes, skin, resp sys, blood 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

Isopropyl acetate Formula: 

CH3COOCH(CH3)2

CAS#: 

108-21-4 

RTECS#: 

AI4930000 

IDLH: 

1800 ppm 

Conversion: 1 ppm = 4.18 mg/m3 DOT: 1220 129 

Synonyms/Trade Names: Isopropyl ester of acetic acid, 1-Methylethyl ester of acetic acid, 2-Propyl acetate 

Exposure Limits: 

NIOSH REL: See Appendix D 

OSHA PEL†: TWA 250 ppm (950 mg/m3

) 

Physical Description: Colorless liquid with a fruity odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1454, 1460 

OSHA 7 

Chemical & Physical 

Properties: 

MW: 102.2 

BP: 194°F 

Sol: 3% 

Fl.P: 36°F 

IP: 9.95 eV 

Sp.Gr: 0.87 

VP: 42 mmHg 

FRZ: -92°F 

UEL: 8% 

LEL(100°F): 1.8% 

Class IB Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

OSHA 

1800 ppm: Sa:Cf£/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Nitrates; strong oxidizers, alkalis & acids 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, nose; derm; in animals: narco 

TO: Eyes, skin, resp sys, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush prompt 

Breath: Resp support 

Swallow: Medical attention immed 
181

I 

Isopropyl alcohol Formula: 

(CH3)2CHOH 

CAS#: 

67-63-0 

RTECS#: 

NT8050000 

IDLH: 

2000 ppm [10%LEL] 

Conversion: 1 ppm = 2.46 mg/m3 DOT: 1219 129 

Synonyms/Trade Names: Dimethyl carbinol, IPA, Isopropanol, 2-Propanol, sec-Propyl alcohol, Rubbing alcohol 

Exposure Limits: 

NIOSH REL: TWA 400 ppm (980 mg/m3

) 

 ST 500 ppm (1225 mg/m3

) 

OSHA PEL†: TWA 400 ppm (980 mg/m3

) 

Physical Description: Colorless liquid with the odor of rubbing alcohol. 

Measurement Methods 

(see Table 1): 

NIOSH 1400 

OSHA 109 

Chemical & Physical 

Properties: 

MW: 60.1 

BP: 181°F 

Sol: Miscible 

Fl.P: 53°F 

IP: 10.10 eV 

Sp.Gr: 0.79 

VP: 33 mmHg 

FRZ: -127°F 

UEL(200°F): 12.7% 

LEL: 2.0% 

Class IB Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

2000 ppm: Sa:Cf£/CcrFOv/GmFOv/ 

 PaprOv£/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, acetaldehyde, chlorine, ethylene oxide, acids, isocyanates 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, nose, throat; drow, dizz, head; dry cracking skin; 

in animals: narco 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush 

Breath: Resp support 

Swallow: Medical attention immed 

Isopropylamine Formula: 

(CH3)2CHNH2

CAS#: 

75-31-0 

RTECS#: 

NT8400000 

IDLH: 

750 ppm 

Conversion: 1 ppm = 2.42 mg/m3 DOT: 1221 132 

Synonyms/Trade Names: 2-Aminopropane, Monoisopropylamine, 2-Propylamine, sec-Propylamine 

Exposure Limits: 

NIOSH REL: See Appendix D 

OSHA PEL†: TWA 5 ppm (12 mg/m3

) 

Physical Description: Colorless liquid with an ammonia-like odor. 

[Note: A gas above 91°F.] 

Measurement Methods 

(see Table 1): 

NIOSH S147 (II-3) 

Chemical & Physical 

Properties: 

MW: 59.1 

BP: 91°F 

Sol: Miscible 

Fl.P(oc): -35°F 

IP: 8.72 eV 

Sp.Gr: 0.69 

VP: 460 mmHg 

FRZ: -150°F 

UEL: ? 

LEL: ? 

Class IA Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

OSHA 

125 ppm: Sa:Cf£/PaprS£ 

250 ppm: CcrFS/GmFS/PaprTS£/ 

 ScbaF/SaF 

750 ppm: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFS/ScbaE 

Incompatibilities and Reactivities: Strong acids, strong oxidizers, aldehydes, ketones, epoxides 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, nose, throat; pulm edema; vis dist; eye, skin burns; derm 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 
182

I 

N-Isopropylaniline Formula: 

C6H5NHCH(CH3)2

CAS#: 

768-52-5 

RTECS#: 

BY4190000 

IDLH: 

N.D. 

Conversion: 1 ppm = 5.53 mg/m3 DOT: 

Synonyms/Trade Names: N-IPA, Isopropylaniline, N-(1-Methylethyl)-benzenamine, N-Phenylisopropylamine 

Exposure Limits: 

NIOSH REL: TWA 2 ppm (10 mg/m3

) [skin] 

OSHA PEL†: none 

Physical Description: Clear, yellowish liquid with a sweet, aromatic odor. 

Measurement Methods 

(see Table 1): 

OSHA 78 

Chemical & Physical Properties: 

MW: 135.2 

BP: 397°F 

Sol: ? 

Fl.P(oc): 190°F 

IP: ? 

Sp.Gr(60°F): 0.93 

VP(77°F): 0.03 mmHg 

FRZ: -58°F 

UEL: ? 

LEL: ? 

Class IIIB Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: None reported 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin; head, lass, dizz; cyan; ataxia; dysp on effort; 

tacar; methemo 

TO: Eyes, skin, resp sys, blood, CVS, liver, kidneys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 

Isopropyl ether Formula: 

(CH3)2CHOCH(CH3)2

CAS#: 

108-20-3 

RTECS#: 

TZ5425000 

IDLH: 

1400 ppm [10%LEL]

Conversion: 1 ppm = 4.18 mg/m3 DOT: 1159 127 

Synonyms/Trade Names: Diisopropyl ether, Diisopropyl oxide, 2-Isopropoxy propane 

Exposure Limits: 

NIOSH REL: TWA 500 ppm (2100 mg/m3

) 

OSHA PEL: TWA 500 ppm (2100 mg/m3

) 

Physical Description: Colorless liquid with a sharp, sweet, ether-like odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1618 

OSHA 7 

Chemical & Physical 

Properties: 

MW: 102.2 

BP: 154°F 

Sol: 0.2% 

Fl.P: -18°F 

IP: 9.20 eV 

Sp.Gr: 0.73 

VP: 119 mmHg 

FRZ: -76°F 

UEL: 7.9% 

LEL: 1.4% 

Class IB Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

1400 ppm: CcrOv*/PaprOv*/GmFOv/ 

 Sa*/ScbaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, acids 

[Note: Unstable peroxides may form on long contact with air.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, nose; resp discomfort; derm; in animals: 

drow, dizz, uncon, narco 

TO: Eyes, skin, resp sys, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 
183

K 

Isopropyl glycidyl ether Formula: 

C6H12O2

CAS#: 

4016-14-2 

RTECS#: 

TZ3500000 

IDLH: 

400 ppm 

Conversion: 1 ppm = 4.75 mg/m3 DOT: 

Synonyms/Trade Names: 1,2-Epoxy-3-isopropoxypropane; IGE; Isopropoxymethyl oxirane 

Exposure Limits: 

NIOSH REL: C 50 ppm (240 mg/m3

) [15-minute] 

OSHA PEL†: TWA 50 ppm (240 mg/m3

) 

Physical Description: Colorless liquid. 

Measurement Methods 

(see Table 1): 

NIOSH 1620 

OSHA 7 

Chemical & Physical 

Properties: 

MW: 116.2 

BP: 279°F 

Sol: 19% 

Fl.P: 92°F 

IP: ? 

Sp.Gr: 0.92 

VP(77°F): 9 mmHg 

FRZ: ? 

UEL: ? 

LEL: ? 

Class IC Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

400 ppm: Sa:Cf£/ScbaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, strong caustics 

[Note: May form explosive peroxides upon exposure to air or light.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, upper resp sys; skin sens; possible hemato, 

repro effects 

TO: Eyes, skin, resp sys, blood, repro sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

Kaolin Formula: CAS#: 

1332-58-7 

RTECS#: 

GF1670500 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: China clay, Clay, Hydrated aluminum silicate, Hydrite, Porcelain clay 

[Note: Main constituent of Kaolin is Kaolinite (Al2Si2O5(OH)4).] 

Exposure Limits: 

NIOSH REL: TWA 10 mg/m3

 (total) 

 TWA 5 mg/m3

 (resp) 

OSHA PEL†: TWA 15 mg/m3

 (total) 

 TWA 5 mg/m3

 (resp) 

Physical Description: White to yellowish or grayish powder. 

[Note: When moistened, darkens & develops a clay-like odor.] 

Measurement Methods 

(see Table 1): 

NIOSH 0500, 0600 

Chemical & Physical Properties: 

MW: varies 

BP: ? 

Sol: Insoluble 

Fl.P: NA 

IP: NA 

Sp.Gr: 1.8-2.6 

VP: 0 mmHg (approx) 

MLT: ? 

UEL: NA 

LEL: NA 

Noncombustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: None reported 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con 

SY: Chronic pulm fib, stomach granuloma 

TO: Resp sys, stomach 

First Aid (see Table 6): 

Eye: Irr immed 

Breath: Fresh air 
184

K 

Kepone Formula: 

C10Cl10O 

CAS#: 

143-50-0 

RTECS#: 

PC8575000 

IDLH: 

Ca [N.D.] 

Conversion: DOT: 

Synonyms/Trade Names: Chlordecone; Decachlorooctahydro-1,3,4-metheno-2H-cyclobuta(cd)-pentalen-2-one; 

Decachlorooctahydro-kepone-2-one; Decachlorotetrahydro-4,7-methanoindeneone 

Exposure Limits: 

NIOSH REL: Ca 

 TWA 0.001 mg/m3

 

 See Appendix A 

OSHA PEL: none 

Physical Description: Tan to white, crystalline, odorless solid. [insecticide] 

Measurement Methods 

(see Table 1): 

NIOSH 5508 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam/Daily 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Chemical & Physical Properties: 

MW: 490.6 

BP: Sublimes 

Sol(212°F): 0.5% 

Fl.P: NA 

IP: ? 

Sp.Gr: ? 

VP(77°F): 3 x 10-7 mmHg 

MLT: 662°F (Sublimes) 

UEL: NA 

LEL: NA 

Noncombustible Solid Incompatibilities and Reactivities: Acids, acid fumes 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Head, anxi, tremor; liver, kidney damage; vis dist; ataxia, chest 

pain, skin eryt; testicular atrophy, low sperm count; [carc] 

TO: Eyes, skin, resp sys, CNS, liver, kidneys, repro sys [in animal: 

liver cancer] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

Kerosene Formula: CAS#: 

8008-20-6 

RTECS#: 

OA5500000 

IDLH: 

N.D. 

Conversion: DOT: 1223 128 

Synonyms/Trade Names: Fuel Oil No. 1, Range oil 

[Note: A refined petroleum solvent (predominantly C9-C16), which typically is 25% normal paraffins, 11% branched 

paraffins, 30% monocycloparaffins, 12% dicycloparaffins, 1% tricycloparaffins, 16% mononuclear aromatics, and 

5% dinuclear aromatics.] 

Exposure Limits: 

NIOSH REL: TWA 100 mg/m3

OSHA PEL: none 

Measurement Methods 

(see Table 1): 

NIOSH 1550 

Physical Description: Colorless to yellowish, oily liquid with a strong, characteristic odor. 

Chemical & Physical 

Properties: 

MW: 170 (approx) 

BP: 347-617°F 

Sol: Insoluble 

Fl.P: 100-162°F 

IP: ? 

Sp.Gr: 0.81 

VP(100°F): 5 mmHg 

FRZ: -50°F 

UEL: 5% 

LEL: 0.7% 

Class II Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

1000 mg/m3

: CcrOv/Sa 

2500 mg/m3

: Sa:Cf/PaprOv 

5000 mg/m3

: CcrFOv/GmFOv/ 

 PaprTOv/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, nose, throat; burning sensation in chest; head, nau, lass, 

restless, inco, conf, drow; vomit, diarr; derm; chemical pneu (aspir liquid) 

TO: Eyes, skin, resp sys, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap flush immed 

Breath: Resp support 

Swallow: Medical attention immed 
185

L 

Ketene Formula: 

CH2=CO 

CAS#: 

463-51-4 

RTECS#: 

OA7700000 

IDLH: 

5 ppm 

Conversion: 1 ppm = 1.72 mg/m3 DOT: 

Synonyms/Trade Names: Carbomethene, Ethenone, Keto-ethylene 

Exposure Limits: 

NIOSH REL: TWA 0.5 ppm (0.9 mg/m3

) 

 ST 1.5 ppm (3 mg/m3

) 

OSHA PEL†: TWA 0.5 ppm (0.9 mg/m3

) 

Physical Description: Colorless gas with a penetrating odor. 

Measurement Methods 

(see Table 1): 

NIOSH S92 (II-2) 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

5 ppm: Sa*/ScbaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Chemical & Physical 

Properties: 

MW: 42.0 

BP: -69°F 

Sol: Reacts 

Fl.P: NA (Gas) 

IP: 9.61 eV 

RGasD: 1.45 

VP: >1 atm 

FRZ: -238°F 

UEL: ? 

LEL: ? 

Flammable Gas 

Incompatibilities and Reactivities: Water, alcohols, ammonia 

[Note: Readily polymerizes. Reacts with water to form acetic acid.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con 

SY: Irrit eyes, skin, nose, throat, resp sys; pulm edema 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Breath: Resp support 

Lead Formula: 

Pb 

CAS#: 

7439-92-1 

RTECS#: 

OF7525000 

IDLH: 

100 mg/m3

 (as Pb) 

Conversion: DOT: 

Synonyms/Trade Names: Lead metal, Plumbum 

Exposure Limits: 

NIOSH REL*: TWA 0.050 mg/m3

 

 See Appendix C 

OSHA PEL*: [1910.1025] TWA 0.050 mg/m3

 

 See Appendix C 

[*Note: The REL and PEL also apply to other lead 

compounds (as Pb) -- see Appendix C.] 

Physical Description: A heavy, ductile, soft, gray solid. 

Measurement Methods 

(see Table 1): 

NIOSH 7082, 7105, 7300, 7301, 7303, 

 7700, 7701, 7702, 9102, 9105 

OSHA ID121, ID125G, ID206 

Chemical & Physical Properties: 

MW: 207.2 

BP: 3164°F 

Sol: Insoluble 

Fl.P: NA 

IP: NA 

Sp.Gr: 11.34 

VP: 0 mmHg (approx) 

MLT: 621°F 

UEL: NA 

LEL: NA 

Noncombustible Solid in bulk form. 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: Daily 

Remove: When wet or contam 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

0.5 mg/m3

: 100XQ/Sa 

1.25 mg/m3

: Sa:Cf/PaprHie 

2.5 mg/m3

: 100F/SaT:Cf/PaprTHie/ 

 ScbaF/SaF 

50 mg/m3

: Sa:Pd,Pp 

100 mg/m3

: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

See Appendix E (page 351) 

Incompatibilities and Reactivities: Strong oxidizers, hydrogen peroxide, acids 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Lass, insom; facial pallor; anor, low-wgt, malnut; constip, abdom 

pain, colic; anemia; gingival lead line; tremor; para wrist, ankles; 

encephalopathy; kidney disease; irrit eyes; hypotension 

TO: Eyes, GI tract, CNS, kidneys, blood, gingival tissue 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap flush prompt 

Breath: Resp support 

Swallow: Medical attention immed 
186

L 

Limestone Formula: 

CaCO3

CAS#: 

1317-65-3 

RTECS#: IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: Calcium carbonate, Natural calcium carbonate 

[Note: Calcite & aragonite are commercially important natural calcium carbonates.] 

Exposure Limits: 

NIOSH REL: TWA 10 mg/m3

 (total) 

 TWA 5 mg/m3

 (resp) 

OSHA PEL: TWA 15 mg/m3

 (total) 

 TWA 5 mg/m3

 (resp) 

Physical Description: Odorless, white to tan powder. 

Measurement Methods 

(see Table 1): 

NIOSH 0500, 0600 

Chemical & Physical Properties: 

MW: 100.1 

BP: Decomposes 

Sol: 0.001% 

Fl.P: NA 

IP: NA 

Sp.Gr: 2.7-2.9 

VP: 0 mmHg (approx) 

MLT: 1517-2442°F (Decomposes) 

UEL: NA 

LEL: NA 

Noncombustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Fluorine, magnesium, acids, alum, ammonium salts 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con 

SY: Irrit eyes, skin, muc memb; cough, sneez, rhin; lac 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash 

Breath: Fresh air 

Lindane Formula: 

C6H6Cl6

CAS#: 

58-89-9 

RTECS#: 

GV4900000 

IDLH: 

50 mg/m3

Conversion: DOT: 2761 151 

Synonyms/Trade Names: BHC; HCH; γ-Hexachlorocyclohexane; 

gamma isomer of 1,2,3,4,5,6-Hexachlorocyclohexane 

Exposure Limits: 

NIOSH REL: TWA 0.5 mg/m3

 [skin] 

OSHA PEL: TWA 0.5 mg/m3

 [skin] 

Physical Description: White to yellow, crystalline powder with a slight, musty odor. 

[pesticide] 

Measurement Methods 

(see Table 1): 

NIOSH 5502 

Chemical & Physical Properties: 

MW: 290.8 

BP: 614°F 

Sol: 0.001% 

Fl.P: NA 

IP: ? 

Sp.Gr: 1.85 

VP: 0.00001 mmHg 

MLT: 235°F 

UEL: NA 

LEL: NA 

Noncombustible Solid, but may be 

dissolved in flammable liquids. 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: N.R. 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Provide: Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

5 mg/m3

: CcrOv95/Sa 

12.5 mg/m3

: Sa:Cf*/PaprOvHie* 

25 mg/m3

: CcrFOv100/GmFOv100/ 

 PaprTOvHie*/ScbaF/SaF 

50 mg/m3

: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Incompatibilities and Reactivities: Corrosive to metals 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, nose, throat; head; nau; clonic convuls; resp difficulty; 

cyan; aplastic anemia; musc spasm; in animals: liver, kidney damage 

TO: Eyes, skin, resp sys, CNS, blood, liver, kidneys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 
187

L 

Lithium hydride Formula: 

LiH 

CAS#: 

7580-67-8 

RTECS#: 

OJ6300000 

IDLH: 

0.5 mg/m3

Conversion: DOT: 1414 138; 2805 138 (fused, solid) 

Synonyms/Trade Names: Lithium monohydride 

Exposure Limits: 

NIOSH REL: TWA 0.025 mg/m3

OSHA PEL: TWA 0.025 mg/m3

Physical Description: Odorless, off-white to gray, translucent, crystalline mass or 

white powder. 

Measurement Methods 

(see Table 1): 

OSHA ID121 

Chemical & Physical Properties: 

MW: 7.95 

BP: Decomposes 

Sol: Reacts 

Fl.P: NA 

IP: NA 

Sp.Gr: 0.78 

VP: 0 mmHg (approx) 

MLT: 1256°F 

UEL: NA 

LEL: NA 

Combustible Solid that can form 

airborne dust clouds which may 

explode on contact with flame, heat, 

or oxidizers. 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: Brush 

 (DO NOT WASH) 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench (>0.5 mg/m3

) 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

0.25 mg/m3

: 100XQ/Sa 

0.5 mg/m3

: Sa:Cf*/100F/PaprHie*/ 

 ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, halogenated hydrocarbons, acids, water 

[Note: May ignite SPONTANEOUSLY in air and may reignite after fire is extinguished. Reacts with water to form 

hydrogen & lithium hydroxide.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin; eye, skin burns; mouth, esophagus burns (if 

ingested); nau; musc twitches; mental conf; blurred vision 

TO: Eyes, skin, resp sys, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Brush (DO NOT WASH) 

Breath: Resp support 

Swallow: Medical attention immed 

L.P.G. Formula: 

C3H8/C3H6/C4H10/C4H8

CAS#: 

68476-85-7 

RTECS#: 

SE7545000 

IDLH: 

2000 ppm [10%LEL] 

Conversion: 1 ppm = 1.72-2.37 mg/m3 DOT: 1075 115 

Synonyms/Trade Names: Bottled gas, Compressed petroleum gas, Liquefied hydrocarbon gas, 

Liquefied petroleum gas, LPG [Note: A fuel mixture of propane, propylene, butanes & butylenes.] 

Exposure Limits: 

NIOSH REL: TWA 1000 ppm (1800 mg/m3

) 

OSHA PEL: TWA 1000 ppm (1800 mg/m3

) 

Measurement Methods 

(see Table 1): 

NIOSH S93 (II-2) 

Physical Description: Colorless, noncorrosive, odorless gas when pure. 

[Note: A foul-smelling odorant is usually added. Shipped as a liquefied compressed gas.] 

Chemical & Physical Properties: 

MW: 42-58 

BP: >-44°F 

Sol: Insoluble 

Fl.P: NA (Gas) 

IP: 10.95 eV 

RGasD: 1.45-2.00 

VP: >1 atm 

FRZ: ? 

UEL: 9.5% (Propane) 8.5% (Butane) 

LEL: 2.1% (Propane) 1.9% (Butane) 

Flammable Gas 

Personal Protection/Sanitation

(see Table 2): 

Skin: Frostbite 

Eyes: Frostbite 

Wash skin: N.R. 

Remove: When wet (flamm) 

Change: N.R. 

Provide: Frostbite wash 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

2000 ppm: Sa/ScbaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, chlorine dioxide 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con (liquid) 

SY: Dizz, drow, asphy; liquid: frostbite 

TO: Resp sys, CNS 

First Aid (see Table 6): 

Eye: Irr immed (liquid) 

Skin: Water flush immed (liquid) 

Breath: Resp support 
188

M 

Magnesite Formula: 

MgCO3

CAS#: 

546-93-0 

RTECS#: 

OM2470000 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: Carbonate magnesium, Hydromagnesite, Magnesium carbonate, 

Magnesium(II) carbonate [Note: Magnesite is a naturally-occurring form of magnesium carbonate.] 

Exposure Limits: 

NIOSH REL: TWA 10 mg/m3

 (total) 

 TWA 5 mg/m3

 (resp) 

OSHA PEL: TWA 15 mg/m3

 (total) 

 TWA 5 mg/m3

 (resp) 

Physical Description: White, odorless, crystalline powder. 

Measurement Methods 

(see Table 1): 

NIOSH 0500, 0600 

Chemical & Physical Properties: 

MW: 84.3 

BP: Decomposes 

Sol: 0.01% 

Fl.P: NA 

IP: NA 

Sp.Gr: 2.96 

VP: 0 mmHg (approx) 

MLT: 662°F (Decomposes) 

UEL: NA 

LEL: NA 

Noncombustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Acids, formaldehyde 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con 

SY: Irrit eyes, skin, resp sys; cough 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Breath: Fresh air 

Magnesium oxide fume Formula: 

MgO 

CAS#: 

1309-48-4 

RTECS#: 

OM3850000 

IDLH: 

750 mg/m3

Conversion: DOT: 

Synonyms/Trade Names: Magnesia fume 

Exposure Limits: 

NIOSH REL: See Appendix D 

OSHA PEL†: TWA 15 mg/m3

Physical Description: Finely divided white particulate dispersed in air. 

[Note: Exposure may occur when magnesium is burned, thermally cut, or 

welded upon.] 

Measurement Methods 

(see Table 1): 

NIOSH 7300, 7301, 7303 

OSHA ID121 

Chemical & Physical 

Properties: 

MW: 40.3 

BP: 6512°F 

Sol(86°F): 0.009% 

Fl.P: NA 

IP: NA 

Sp.Gr: 3.58 

VP: 0 mmHg (approx) 

MLT: 5072°F 

UEL: NA 

LEL: NA 

Noncombustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

OSHA 

150 mg/m3

: 95XQ/Sa 

375 mg/m3

: Sa:Cf/PaprHie 

750 mg/m3

: 100F/PaprTHie*/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Incompatibilities and Reactivities: Chlorine trifluoride, phosphorus pentachloride 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con 

SY: Irrit eyes, nose; metal fume fever: cough, chest pain, flu-like fever 

TO: Eyes, resp sys 

First Aid (see Table 6): 

Breath: Resp support 
189

M 

Malathion Formula: 

C10H19O6PS2

CAS#: 

121-75-5 

RTECS#: 

WM8400000 

IDLH: 

250 mg/m3

Conversion: DOT: 2783 152 

Synonyms/Trade Names: S-[1,2-bis(ethoxycarbonyl) ethyl]O,O-dimethyl-phosphorodithioate; 

Diethyl (dimethoxyphosphinothioylthio) succinate 

Exposure Limits: 

NIOSH REL: TWA 10 mg/m3

 [skin] 

OSHA PEL†: TWA 15 mg/m3

 [skin] 

Physical Description: Deep-brown to yellow liquid with a garlic-like odor. [insecticide] 

[Note: A solid below 37°F.] 

Measurement Methods 

(see Table 1): 

NIOSH 5600 

OSHA 62 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

100 mg/m3

: CcrOv95/Sa 

250 mg/m3

: Sa:Cf*/CcrFOv100/ 

 GmFOv100/PaprOvHie*/ 

 ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Chemical & Physical 

Properties: 

MW: 330.4 

BP: 140°F (Decomposes) 

Sol: 0.02% 

Fl.P(oc): >325°F 

IP: ? 

Sp.Gr: 1.21 

VP: 0.00004 mmHg 

FRZ: 37°F 

UEL: ? 

LEL: ? 

Class IIIB Combustible Liquid, 

but may be difficult to ignite. 

Incompatibilities and Reactivities: Strong oxidizers, magnesium, 

alkaline pesticides [Note: Corrosive to metals.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin; miosis, aching eyes, blurred vision, lac; salv; anor, 

nau, vomit, abdom cramps, diarr, dizz, conf, ataxia; rhin, head; chest 

tight, wheez, lar spasm 

TO: Eyes, skin, resp sys, liver, blood chol, CNS, CVS, GI tract 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 

Maleic anhydride Formula: 

C4H2O3

CAS#: 

108-31-6 

RTECS#: 

ON3675000 

IDLH: 

10 mg/m3

Conversion: 1 ppm = 4.01 mg/m3 DOT: 2215 156 

Synonyms/Trade Names: cis-Butenedioic anhydride; 2,5-Furanedione; Maleic acid anhydride; Toxilic anhydride 

Exposure Limits: 

NIOSH REL: TWA 1 mg/m3

 (0.25 ppm) 

OSHA PEL: TWA 1 mg/m3

 (0.25 ppm) 

Physical Description: Colorless needles, white lumps, or pellets with an irritating, 

choking odor. 

Measurement Methods 

(see Table 1): 

NIOSH 3512 

OSHA 25, 86 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

10 mg/m3

: Sa:Cf£/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Chemical & Physical Properties: 

MW: 98.1 

BP: 396°F 

Sol: Reacts 

Fl.P: 218°F 

IP: 9.90 eV 

Sp.Gr: 1.48 

VP: 0.2 mmHg 

MLT: 127°F 

UEL: 7.1% 

LEL: 1.4% 

Combustible Solid, but may be 

difficult to ignite. 

Incompatibilities and Reactivities: Strong oxidizers, water, alkalis, metals, 

caustics, and amines above 150°F 

[Note: Reacts slowly with water (hydrolyzes) to form maleic acid.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit nose, upper resp sys; conj; photo, double vision; 

bronchial asthma; derm 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 
190

M 

Malonaldehyde Formula: 

CHOCH2CHO 

CAS#: 

542-78-9 

RTECS#: 

TX6475000 

IDLH: 

Ca [N.D.] 

Conversion: DOT: 

Synonyms/Trade Names: Malonic aldehyde; Malonodialdehyde; Propanedial; 1,3-Propanedial 

[Note: Pure Malonaldehyde is unstable and may be used as its sodium salt.] 

Exposure Limits: 

NIOSH REL: Ca 

 See Appendix A 

 See Appendix C (Aldehydes) 

OSHA PEL: none 

Physical Description: Solid (needles). 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical 

Properties: 

MW: 72.1 

BP: ? 

Sol: ? 

Fl.P: ? 

IP: ? 

Sp.Gr: ? 

VP: ? 

MLT: 161°F 

UEL: ? 

LEL: ? 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam/Daily 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Proteins 

[Note: Pure compound is stable under neutral conditions, but not under acidic conditions.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, resp sys; CNS depres; [carc] 

TO: Eyes, skin, resp sys, CNS [in animals: thyroid gland tumors] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

Malononitrile Formula: 

NCCH2CN 

CAS#: 

109-77-3 

RTECS#: 

OO3150000 

IDLH: 

N.D. 

Conversion: 1 ppm = 2.70 mg/m3 DOT: 2647 153 

Synonyms/Trade Names: Cyanoacetonitrile, Dicyanomethane, Malonic dinitrile 

Exposure Limits: 

NIOSH REL: TWA 3 ppm (8 mg/m3

) 

OSHA PEL: none 

Physical Description: White powder or colorless crystals. 

[Note: Melts above 90°F. Forms cyanide in the body.] 

Measurement Methods 

(see Table 1): 

NIOSH Nitriles Criteria Document

Chemical & Physical 

Properties: 

MW: 66.1 

BP: 426°F 

Sol: 13% 

Fl.P(oc): 266°F 

IP: 12.88 eV 

Sp.Gr: 1.19 

VP: ? 

MLT: 90°F 

UEL: ? 

LEL: ? 

Combustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

80 mg/m3

: Sa 

200 mg/m3

: Sa:Cf 

400 mg/m3

: ScbaF/SaF 

667 mg/m3

: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong bases [Note: May polymerize violently on prolonged heating at 265°F, 

or in contact with strong bases at lower temperatures.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, nose, throat; head, dizz, lass, conf, convuls; 

dysp; abdom pain, nau, vomit 

TO: Eyes, skin, resp sys, CNS, CVS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water wash immed 

Breath: Resp support 

Swallow: Medical attention immed 
191

M 

Manganese compounds and fume 

(as Mn) 

Formula: 

Mn (metal) 

CAS#: 

7439-96-5 

(metal) 

RTECS#: 

OO9275000 

(metal) 

IDLH: 

500 mg/m3

 (as Mn) 

Conversion: DOT: 

Synonyms/Trade Names: Manganese metal: Colloidal manganese, Manganese-55 

Synonyms of other compounds vary depending upon the specific manganese compound. 

Exposure Limits: 

NIOSH REL*: TWA 1 mg/m3

 

 ST 3 mg/m3

 

[*Note: Also see specific listings for Manganese cyclopentadienyl tricarbonyl, Methyl 

cyclopentadienyl manganese tricarbonyl, and Manganese tetroxide.] 

OSHA PEL*: C 5 mg/m3

 

[*Note: Also see specific listings for Manganese cyclopentadienyl tricarbonyl and Methyl 

cyclopentadienyl manganese tricarbonyl.] 

Physical Description: A lustrous, brittle, silvery solid. 

Measurement 

Methods 

(see Table 1): 

NIOSH 7300, 7301, 

 7303, 9102 

OSHA ID121, ID125G 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

10 mg/m3

: 95XQ/Sa 

25 mg/m3

: Sa:Cf/PaprHie 

50 mg/m3

: 100F/SaT:Cf/PaprTHie/ 

 ScbaF/SaF 

500 mg/m3

: Sa:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Chemical & Physical Properties: 

MW: 54.9 

BP: 3564°F 

Sol: Insoluble 

Fl.P: NA 

IP: NA 

Sp.Gr: 7.20 (metal) 

VP: 0 mmHg (approx) 

MLT: 2271°F 

UEL: NA 

LEL: NA 

Metal: Combustible Solid Incompatibilities and Reactivities: Oxidizers 

[Note: Will react with water or steam to produce hydrogen.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing 

SY: Parkinson's; asthenia, insom, mental conf; metal fume fever: dry 

throat, cough, chest tight, dysp, rales, flu-like fever; low-back pain; vomit; 

mal; lass; kidney damage 

TO: Resp sys, CNS, blood, kidneys 

First Aid (see Table 6): 

Breath: Resp support 

Swallow: Medical attention immed 

Manganese cyclopentadienyl 

tricarbonyl (as Mn) 

Formula: 

C5H5Mn(CO)3

CAS#: 

12079-65-1 

RTECS#: 

OO9720000 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: Cyclopentadienylmanganese tricarbonyl, Cyclopentadienyl tricarbonyl manganese, MCT

Exposure Limits: 

NIOSH REL: TWA 0.1 mg/m3

 [skin] 

OSHA PEL†: C 5 mg/m3

Measurement Methods 

(see Table 1): 

None available 

Physical Description: Yellow, crystalline solid with a characteristic odor. 

[Note: An antiknock additive for gasoline. May be found in an oil & gaseous solution.] 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Chemical & Physical Properties: 

MW: 204.1 

BP: Sublimes 

Sol: Slight 

Fl.P: ? 

IP: ? 

Sp.Gr: ? 

VP: ? 

MLT: 167°F (Sublimes) 

UEL: ? 

LEL: ? 

Combustible Solid Incompatibilities and Reactivities: Oxygen 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: In animals: irrit skin; pulm edema; convuls; CNS, resp sys, 

kidney changes; decr resistance to infection 

TO: Skin, resp sys, CNS, kidneys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash 

Breath: Resp support 

Swallow: Medical attention immed 
192

M 

Manganese tetroxide (as Mn) Formula: 

Mn3O4

CAS#: 

1317-35-7 

RTECS#: 

OP0895000 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: Manganese oxide, Manganomanganic oxide, Trimanganese tetraoxide, 

Trimanganese tetroxide 

Exposure Limits: 

NIOSH REL: See Appendix D 

OSHA PEL†: C 5 mg/m3

Physical Description: Brownish-black powder. 

[Note: Fumes are generated whenever manganese oxides are heated strongly in air.] 

Measurement Methods 

(see Table 1): 

NIOSH 7300, 7301, 7303, 

 9102 

OSHA ID121, ID125G 

Chemical & Physical Properties: 

MW: 228.8 

BP: ? 

Sol: Insoluble 

Fl.P: NA 

IP: NA 

Sp.Gr: 4.88 

VP: 0 mmHg (approx) 

MLT: 2847°F 

UEL: NA 

LEL: NA 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Soluble in hydrochloric acid (liberates chlorine gas) 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Asthenia, insom, mental conf; low-back pain; vomit; mal, 

lass; kidney damage; pneu 

TO: Resp sys, CNS, blood, kidneys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash 

Breath: Resp support 

Swallow: Medical attention immed 

Marble Formula: 

CaCO3

CAS#: 

1317-65-3 

RTECS#: 

EV9580000 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: Calcium carbonate, Natural calcium carbonate 

[Note: Marble is a metamorphic form of calcium carbonate.] 

Exposure Limits: 

NIOSH REL: TWA 10 mg/m3

 (total) 

 TWA 5 mg/m3

 (resp) 

OSHA PEL: TWA 15 mg/m3

 (total) 

 TWA 5 mg/m3

 (resp) 

Physical Description: Odorless, white powder. 

Measurement Methods 

(see Table 1): 

NIOSH 0500, 0600 

Chemical & Physical Properties: 

MW: 100.1 

BP: Decomposes 

Sol: 0.001% 

Fl.P: NA 

IP: NA 

Sp.Gr: 2.7-2.9 

VP: 0 mmHg (approx) 

MLT: 1517-2442°F (Decomposes) 

UEL: NA 

LEL: NA 

Noncombustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Fluorine, magnesium, acids, alum, ammonium salts 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con 

SY: Irrit eyes, skin, muc memb, upper resp sys; cough, sneez, rhin; lac 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash 

Breath: Fresh air 
193

M 

Mercury compounds [except 

(organo) alkyls] (as Hg) 

Formula: 

Hg (metal) 

CAS#: 

7439-97-6 

(metal) 

RTECS#: 

OV4550000 

(metal) 

IDLH: 

10 mg/m3

 (as Hg) 

Conversion: DOT: 2809 172 (metal) 

Synonyms/Trade Names: Mercury metal: Colloidal mercury, Metallic mercury, Quicksilver 

Synonyms of “other” Hg compounds vary depending upon the specific compound. 

Exposure Limits: 

NIOSH REL: Hg Vapor: TWA 0.05 mg/m3

 [skin] OSHA PEL†: C 0.1 mg/m3

 Other: C 0.1 mg/m3 [skin] 

Measurement Methods 

(see Table 1): 

NIOSH 6009 OSHA ID140 

Physical Description: Metal: Silver-white, heavy, odorless liquid. 

[Note: “Other” Hg compounds include all inorganic & aryl Hg compounds except (organo) alkyls.] 

Chemical & Physical 

Properties: 

MW: 200.6 

BP: 674°F 

Sol: Insoluble 

Fl.P: NA 

IP: ? 

Sp.Gr: 13.6 (metal) 

VP: 0.0012 mmHg 

FRZ: -38°F 

UEL: NA 

LEL: NA 

Metal: Noncombustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: N.R. 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Incompatibilities and Reactivities: Acetylene, ammonia, 

chlorine dioxide, azides, calcium (amalgam formation), 

sodium carbide, lithium, rubidium, copper

Respirator Recommendations (see Tables

Mercury vapor: 3 and 4): 

NIOSH 

0.5 mg/m3

: CcrS†/Sa 

1.25 mg/m3

: Sa:Cf/PaprS†(canister) 

2.5 mg/m3

: CcrFS†/GmFS†/SaT:Cf/ 

 PaprTS(canister)/ScbaF/SaF 

10 mg/m3

: Sa:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFS/ScbaE 

Other mercury compounds: 

NIOSH/OSHA 

1 mg/m3

: CcrS†/Sa 

2.5 mg/m3

: Sa:Cf/PaprS†(canister) 

5 mg/m3

: CcrFS†/GmFS†/SaT:Cf/ 

 PaprTS(canister)/ScbaF/SaF 

10 mg/m3

: Sa:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFS/ScbaE 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin; cough, chest pain, dysp, bron, pneu; tremor, insom, 

irrity, indecision, head, lass; stomatitis, salv; GI dist, anor, low-wgt; prot

TO: Eyes, skin, resp sys, CNS, kidneys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 

Mercury (organo) alkyl compounds (as Hg) Formula: CAS#: RTECS#: IDLH: 

2 mg/m3

 (as Hg) 

Conversion: DOT: 

Synonyms/Trade Names: Synonyms vary depending upon the specific (organo) alkyl mercury compound. 

Exposure Limits: 

NIOSH REL: TWA 0.01 mg/m3

 OSHA PEL†: TWA 0.01 mg/m3 

 ST 0.03 mg/m3

 [skin] C 0.04 mg/m3

Measurement Methods 

(see Table 1): 

None available 

Physical Description: Appearance and odor vary depending upon the specific (organo) alkyl mercury compound. 

Chemical & Physical 

Properties: 

Properties vary depending 

upon the specific (organo) 

alkyl mercury compound. 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

0.1 mg/m3

: Sa 

0.25 mg/m3

: Sa:Cf 

0.5 mg/m3

: SaT:Cf/ScbaF/SaF 

2 mg/m3

: Sa:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: ScbaE 

Incompatibilities and Reactivities: Strong oxidizers such as chlorine 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Pares; ataxia, dysarthria; vision, hearing dist; spasticity, jerking 

limbs; dizz; salv; lac; nau, vomit, diarr, constip; skin burns; emotional 

dist; kidney inj; possible terato effects 

TO: Eyes, skin, CNS, PNS, kidneys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 
194

M 

Mesityl oxide Formula: 

(CH3)2C=CHCOCH3

CAS#: 

141-79-7 

RTECS#: 

SB4200000 

IDLH: 

1400 ppm [10%LEL]

Conversion: 1 ppm = 4.02 mg/m3 DOT: 1229 129 

Synonyms/Trade Names: Isobutenyl methyl ketone, Isopropylideneacetone, Methyl isobutenyl ketone, 

4-Methyl-3-penten-2-one 

Exposure Limits: 

NIOSH REL: TWA 10 ppm (40 mg/m3

) 

OSHA PEL†: TWA 25 ppm (100 mg/m3

) 

Physical Description: Oily, colorless to light-yellow liquid with a peppermint- or 

honey-like odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1301, 2553 

OSHA 7 

Chemical & Physical 

Properties: 

MW: 98.2 

BP: 266°F 

Sol: 3% 

Fl.P: 87°F 

IP: 9.08 eV 

Sp.Gr(59°F): 0.86 

VP: 9 mmHg 

FRZ: -52°F 

UEL: 7.2% 

LEL: 1.4% 

Class IC Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Provide: Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

250 ppm: Sa:Cf£/PaprOv£ 

500 ppm: CcrFOv/GmFOv/PaprTOv£/ 

 ScbaF/SaF 

1400 ppm: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Oxidizers, acids 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, muc memb; narco, coma; in animals: liver, 

kidney damage; CNS effects 

TO: Eyes, skin, resp sys, CNS, liver, kidneys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

Methacrylic acid Formula: 

CH2=C(CH3)COOH 

CAS#: 

79-41-4 

RTECS#: 

OZ2975000 

IDLH: 

N.D. 

Conversion: 1 ppm = 3.52 mg/m3 DOT: 2531 153P (inhibited) 

Synonyms/Trade Names: Methacrylic acid (glacial), Methacrylic acid (inhibited), α-Methacrylic acid, 

2-Methylacrylic acid, 2-Methylpropenoic acid 

Exposure Limits: 

NIOSH REL: TWA 20 ppm (70 mg/m3

) [skin] 

OSHA PEL†: none 

Physical Description: Colorless liquid or solid (below 61°F) with an acrid, 

repulsive odor. 

Measurement Methods 

(see Table 1): 

OSHA PV2005 

Chemical & Physical Properties: 

MW: 86.1 

BP: 325°F 

Sol(77°F): 9% 

Fl.P(oc): 171°F 

IP: ? 

Sp.Gr: 1.02 (Liquid) 

VP: 0.7 mmHg 

FRZ: 61°F 

UEL: ? 

LEL: ? 

Class IIIA Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Oxidizers, elevated temperatures, hydrochloric acid 

[Note: Typically contains 100 ppm of the monomethyl ether of hydroquinone to prevent polymerization.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, muc memb; eye, skin burns 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 
195

M 

Methomyl Formula: CAS#: 

16752-77-5 

RTECS#: 

AK2975000 

IDLH: 

CH3C(SCH3)NOC(O)NHCH3 N.D. 

Conversion: DOT: 2757 151 (carbamate pesticide, solid, toxic) 

Synonyms/Trade Names: Lannate®, Methyl N-((methylamino)carbonyl)oxy)ethanimidothioate, 

S-Methyl-N-(methylcarbamoyloxy)thioacetimidate 

Exposure Limits: 

NIOSH REL: TWA 2.5 mg/m3

OSHA PEL†: none 

Physical Description: White, crystalline solid with a slight, sulfur-like odor. 

[insecticide] 

Measurement Methods 

(see Table 1): 

NIOSH 5601 

Chemical & Physical Properties: 

MW: 162.2 

BP: ? 

Sol(77°F): 6% 

Fl.P: NA 

IP: ? 

Sp.Gr(75°F): 1.29 

VP(77°F): 0.00005 mmHg 

MLT: 172°F 

UEL: NA 

LEL: NA 

Noncombustible Solid, but may be 

dissolved in flammable liquids. 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Provide: Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Strong bases 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes; blurred vision, miosis; salv; abdom cramps, nau, 

vomit; dysp; lass, musc twitch; liver, kidney damage 

TO: Eyes, resp sys, CNS, CVS, liver, kidneys, blood chol 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

Methoxychlor Formula: 

(C6H4OCH3)2CHCCl3

CAS#: 

72-43-5 

RTECS#: 

KJ3675000 

IDLH: 

Ca [5000 mg/m3

] 

Conversion: DOT: 2761 151 (organochlorine pesticide, solid, toxic) 

Synonyms/Trade Names: p,p'-Dimethoxydiphenyltrichloroethane; DMDT; Methoxy-DDT; 

2,2-bis(p-Methoxyphenyl)-1,1,1-trichloroethane; 1,1,1-Trichloro-2,2-bis-(p-methoxyphenyl)ethane 

Exposure Limits: 

NIOSH REL: Ca 

 See Appendix A 

OSHA PEL†: TWA 15 mg/m3

Physical Description: Colorless to light-yellow crystals with a slight, fruity odor. 

[insecticide] 

Measurement Methods 

(see Table 1): 

NIOSH S371 (II-4) 

OSHA PV2038 

Chemical & Physical Properties: 

MW: 345.7 

BP: Decomposes 

Sol: 0.00001% 

Fl.P: ? 

IP: ? 

Sp.Gr: 1.41 

VP: Very low 

MLT: 171°F 

UEL: ? 

LEL: ? 

Combustible Solid, but difficult to burn. 

Personal Protection/Sanitation

(see Table 2): 

Skin: Prevent skin contact 

Eyes: N.R. 

Wash skin: When contam/Daily 

Remove: When wet or contam 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Incompatibilities and Reactivities: Oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing 

SY: In animals: fasc, trembling, convuls; kidney, liver damage; [carc] 

TO: CNS, liver, kidneys [in animals: liver & ovarian cancer] 

First Aid (see Table 6): 

Skin: Soap wash 

Breath: Fresh air 

Swallow: Medical attention immed 
196

M 

Methoxyflurane Formula: 

CHCl2CF2OCH3

CAS#: 

76-38-0 

RTECS#: 

KN7820000 

IDLH: 

N.D. 

Conversion: 1 ppm = 6.75 mg/m3 DOT: 

Synonyms/Trade Names: 2,2-Dichloro-1,1-difluoroethyl methyl ether; 2,2-Dichloro-1,1-difluoro-1-methoxyethane; 

Methoflurane; Methoxyfluorane; Penthrane 

Exposure Limits: 

NIOSH REL*: C 2 ppm (13.5 mg/m3

) [60-minute] 

 [*Note: REL for exposure to waste anesthetic gas.] 

OSHA PEL: none 

Physical Description: Colorless liquid with a fruity odor. [inhalation anesthetic] 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical Properties: 

MW: 165.0 

BP: 220°F 

Sol: Slight 

Fl.P: ? 

IP: ? 

Sp.Gr(77°F): 1.42 

VP: 23 mmHg 

FRZ: -31°F 

UEL: ? 

LEL(176°F): 7% 

Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: Prevent eye contact 

Wash skin: N.R. 

Remove: When wet or contam 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: None reported 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes; CNS depres, analgesia, anes, convuls, resp 

depres; liver, kidney inj; in animals: repro, terato effects 

TO: Eyes, CNS, liver, kidneys, repro sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash 

Breath: Resp support 

Swallow: Medical attention immed 

4-Methoxyphenol Formula: 

CH3OC6H4OH 

CAS#: 

150-76-5 

RTECS#: 

SL7700000 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: Hydroquinone monomethyl ether, p-Hydroxyanisole, Mequinol, p-Methoxyphenol, 

Monomethyl ether hydroquinone 

Exposure Limits: 

NIOSH REL: TWA 5 mg/m3

OSHA PEL†: none 

Physical Description: Colorless to white, waxy solid with an odor of 

caramel & phenol. 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical Properties: 

MW: 124.2 

BP: 469°F 

Sol(77°F): 4% 

Fl.P(oc): 270°F 

IP: 7.50 eV 

Sp.Gr: 1.55 

VP: <0.01 mmHg 

MLT: 135°F 

UEL: ? 

LEL: ? 

Combustible Solid; under certain 

conditions, a dust cloud can probably 

explode if ignited by a spark or flame. 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Strong oxidizers, strong bases, acid chlorides, acid anhydrides 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, nose, throat, upper resp sys; eye, skin burns; 

CNS depres 

TO: Eyes, skin, resp sys, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap flush immed 

Breath: Resp support 

Swallow: Medical attention immed 
197

M 

Methyl acetate Formula: 

CH3COOCH3

CAS#: 

79-20-9 

RTECS#: 

AI9100000 

IDLH: 

3100 ppm [10%LEL] 

Conversion: 1 ppm = 3.03 mg/m3 DOT: 1231 129 

Synonyms/Trade Names: Methyl ester of acetic acid, Methyl ethanoate 

Exposure Limits: 

NIOSH REL: TWA 200 ppm (610 mg/m3

) 

 ST 250 ppm (760 mg/m3

) 

OSHA PEL†: TWA 200 ppm (610 mg/m3

) 

Physical Description: Colorless liquid with a fragrant, fruity odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1458 

OSHA 7 

Chemical & Physical 

Properties: 

MW: 74.1 

BP: 135°F 

Sol: 25% 

Fl.P: 14°F 

IP: 10.27 eV 

Sp.Gr: 0.93 

VP: 173 mmHg 

FRZ: -145°F 

UEL: 16% 

LEL: 3.1% 

Class IB Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

2000 ppm: CcrOv*/Sa* 

3100 ppm: Sa:Cf*/CcrFOv/GmFOv/ 

 PaprOv*/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Nitrates; strong oxidizers, alkalis & acids; water 

[Note: Reacts slowly with water to form acetic acid & methanol.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, nose, throat; head, drow; optic nerve atrophy; 

chest tight; in animals: narco 

TO: Eyes, skin, resp sys, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush prompt 

Breath: Resp support 

Swallow: Medical attention immed 

Methyl acetylene Formula: 

CH3C≡CH 

CAS#: 

74-99-7 

RTECS#: 

UK4250000 

IDLH: 

1700 ppm [10%LEL] 

Conversion: 1 ppm = 1.64 mg/m3 DOT: 

Synonyms/Trade Names: Allylene, Propine, Propyne, 1-Propyne 

Exposure Limits: 

NIOSH REL: TWA 1000 ppm (1650 mg/m3

) 

OSHA PEL: TWA 1000 ppm (1650 mg/m3

) 

Physical Description: Colorless gas with a sweet odor. 

[Note: A fuel that is shipped as a liquefied compressed gas.] 

Measurement Methods 

(see Table 1): 

NIOSH S84 (II-5) 

Chemical & Physical Properties: 

MW: 40.1 

BP: -10°F 

Sol: Insoluble 

Fl.P: NA (Gas) 

IP: 10.36 eV 

RGasD: 1.41 

VP: 5.2 atm 

FRZ: -153°F 

UEL: ? 

LEL: 1.7% 

Flammable Gas 

Personal Protection/Sanitation

(see Table 2): 

Skin: Frostbite 

Eyes: Frostbite 

Wash skin: N.R. 

Remove: When wet (flamm) 

Change: N.R. 

Provide: Frostbite wash 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

1700 ppm: Sa/ScbaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers (such as chlorine), copper alloys 

[Note: Can decompose explosively at 4.5 to 5.6 atmospheres of pressure.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con (liquid) 

SY: Irrit resp sys; tremor, hyperexcitability, anes; liquid: frostbite 

TO: Resp sys, CNS 

First Aid (see Table 6): 

Eye: Frostbite 

Skin: Frostbite 

Breath: Resp support 
198

M 

Methyl acetylene-propadiene 

mixture 

Formula: 

CH3≡CH/CH2=C=CH2

CAS#: 

59355-75-8 

RTECS#: 

UK4920000 

IDLH: 

3400 ppm 

[10%LEL] 

Conversion: 1 ppm = 1.64 mg/m3 DOT: 1060 116P (stabilized) 

Synonyms/Trade Names: MAPP gas, Methyl acetylene-allene mixture, Propadiene-methyl acetylene, 

Methyl acetylene-propadiene mixture (stabilized), Propyne-allene mixture, Propyne-propadiene mixture 

Exposure Limits: 

NIOSH REL: TWA 1000 ppm (1800 mg/m3

) 

 ST 1250 ppm (2250 mg/m3

) 

OSHA PEL†: TWA 1000 ppm (1800 mg/m3

) 

Physical Description: Colorless gas with a strong, characteristic, foul odor. 

[Note: A fuel that is shipped as a liquefied compressed gas.] 

Measurement Methods 

(see Table 1): 

NIOSH S85 (II-6) 

OSHA 7 

Chemical & Physical 

Properties: 

MW: 40.1 

BP: -36 to -4°F 

Sol: Insoluble 

Fl.P: NA (Gas) 

IP: ? 

RGasD: 1.48 

VP: >1 atm 

FRZ: -213°F 

UEL: 10.8% 

LEL: 3.4% 

Flammable Gas 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Frostbite 

Eyes: Frostbite 

Wash skin: N.R. 

Remove: When wet (flamm) 

Change: N.R. 

Provide: Frostbite wash 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

3400 ppm: Sa/ScbaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFS/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, copper alloys 

[Note: Forms explosive compounds at high pressure in contact with alloys containing more than 67% copper.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con (liquid) 

SY: Irrit resp sys; excitement, conf, anes; liquid: frostbite 

TO: Resp sys, CNS 

First Aid (see Table 6): 

Eye: Frostbite 

Skin: Frostbite 

Breath: Resp support 

Methyl acrylate Formula: 

CH2=CHCOOCH3

CAS#: 

96-33-3 

RTECS#: 

AT2800000 

IDLH: 

250 ppm 

Conversion: 1 ppm = 3.52 mg/m3 DOT: 1919 129P (inhibited) 

Synonyms/Trade Names: Methoxycarbonylethylene, Methyl ester of acrylic acid, Methyl propenoate 

Exposure Limits: 

NIOSH REL: TWA 10 ppm (35 mg/m3

) [skin] 

OSHA PEL: TWA 10 ppm (35 mg/m3

) [skin] 

Physical Description: Colorless liquid with an acrid odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1459, 2552 

OSHA 92 

Chemical & Physical 

Properties: 

MW: 86.1 

BP: 176°F 

Sol: 6% 

Fl.P: 27°F 

IP: 9.90 eV 

Sp.Gr: 0.96 

VP: 65 mmHg 

FRZ: -106°F 

UEL: 25% 

LEL: 2.8% 

Class IB Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Provide: Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

100 ppm: Sa* 

250 ppm: Sa:Cf*/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Nitrates, oxidizers such as peroxides, strong alkalis 

[Note: Polymerizes easily; usually contains an inhibitor such as hydroquinone.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, upper resp sys 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 
199

M 

Methylacrylonitrile Formula: 

CH2=C(CH3)CN 

CAS#: 

126-98-7 

RTECS#: 

UD1400000 

IDLH: 

N.D. 

Conversion: 1 ppm = 2.74 mg/m3 DOT: 3079 131P (inhibited) 

Synonyms/Trade Names: 2-Cyanopropene-1, 2-Cyano-1-propene, Isoprene cyanide, Isopropenylnitrile, 

Methacrylonitrile, α-Methylacrylonitrile, 2-Methylpropenenitrile 

Exposure Limits: 

NIOSH REL: TWA 1 ppm (3 mg/m3

) [skin] 

OSHA PEL†: none 

Physical Description: Colorless liquid with an odor like bitter almonds. 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical Properties: 

MW: 67.1 

BP: 195°F 

Sol: 3% 

Fl.P: 34°F 

IP: ? 

Sp.Gr: 0.80 

VP(77°F): 71 mmHg 

FRZ: -32°F 

UEL: 6.8% 

LEL: 2% 

Class IB Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Strong acids, strong oxidizers, alkali, light 

[Note: Polymerization may occur due to elevated temperature, visible light, or contact with a concentrated alkali.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin; lac; in animals: convuls, loss of motor control in 

hind limbs 

TO: Eyes, skin, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

Methylal Formula: 

CH3OCH2OCH3

CAS#: 

109-87-5 

RTECS#: 

PA8750000 

IDLH: 

2200 ppm [10%LEL] 

Conversion: 1 ppm = 3.11 mg/m3 DOT: 1234 127 

Synonyms/Trade Names: Dimethoxymethane, Formal, Formaldehyde dimethylacetal, 

Methoxymethyl methyl ether, Methylene dimethyl ether 

Exposure Limits: 

NIOSH REL: TWA 1000 ppm (3100 mg/m3

) 

OSHA PEL: TWA 1000 ppm (3100 mg/m3

) 

Physical Description: Colorless liquid with a chloroform-like odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1611 

Chemical & Physical 

Properties: 

MW: 76.1 

BP: 111°F 

Sol: 33% 

Fl.P(oc): -26°F 

IP: 10.00 eV 

Sp.Gr: 0.86 

VP: 330 mmHg 

FRZ: -157°F 

UEL: 13.8% 

LEL: 2.2% 

Class IB Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

2200 ppm: Sa/ScbaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, acids 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, upper resp sys; anes 

TO: Eyes, skin, resp sys, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush prompt 

Breath: Resp support 

Swallow: Medical attention immed 
200

M 

Methyl alcohol Formula: 

CH3OH 

CAS#: 

67-56-1 

RTECS#: 

PC1400000 

IDLH: 

6000 ppm 

Conversion: 1 ppm = 1.31 mg/m3 DOT: 1230 131 

Synonyms/Trade Names: Carbinol, Columbian spirits, Methanol, Pyroligneous spirit, Wood alcohol, 

Wood naphtha, Wood spirit 

Exposure Limits: 

NIOSH REL: TWA 200 ppm (260 mg/m3

) 

 ST 250 ppm (325 mg/m3

) [skin] 

OSHA PEL†: TWA 200 ppm (260 mg/m3

) 

Physical Description: Colorless liquid with a characteristic pungent odor. 

Measurement Methods 

(see Table 1): 

NIOSH 2000, 3800 

OSHA 91 

Chemical & Physical Properties: 

MW: 32.1 

BP: 147°F 

Sol: Miscible 

Fl.P: 52°F 

IP: 10.84 eV 

Sp.Gr: 0.79 

VP: 96 mmHg 

FRZ: -144°F 

UEL: 36% 

LEL: 6.0% 

Class IB Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

2000 ppm: Sa 

5000 ppm: Sa:Cf 

6000 ppm: SaT:Cf/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: ScbaE 

Incompatibilities and Reactivities: Strong oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, upper resp sys; head, drow, dizz, nau, vomit; 

vis dist, optic nerve damage (blindness); derm 

TO: Eyes, skin, resp sys, CNS, GI tract 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush prompt 

Breath: Resp support 

Swallow: Medical attention immed 

Methylamine Formula: 

CH3NH2

CAS#: 

74-89-5 

RTECS#: 

PF6300000 

IDLH: 

100 ppm 

Conversion: 1 ppm = 1.27 mg/m3 DOT: 1061 118 (anhydrous); 1235 132 (aqueous) 

Synonyms/Trade Names: Aminomethane, Methylamine (anhydrous), Methylamine (aqueous), Monomethylamine 

Exposure Limits: 

NIOSH REL: TWA 10 ppm (12 mg/m3

) 

OSHA PEL: TWA 10 ppm (12 mg/m3

) 

Physical Description: Colorless gas with a fish- or ammonia-like odor. 

[Note: A liquid below 21°F. Shipped as a liquefied compressed gas.] 

Measurement Methods 

(see Table 1): 

OSHA 40 

Chemical & Physical 

Properties: 

MW: 31.1 

BP: 21°F 

Sol: Soluble 

Fl.P: NA (Gas) 

 14°F (Liquid) 

IP: 8.97 eV 

RGasD: 1.08 

Sp.Gr: 0.70 (Liquid at 13°F) 

VP: 3.0 atm 

FRZ: -136°F 

UEL: 20.7% 

LEL: 4.9% 

Flammable Gas 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact (solution) 

 Frostbite 

Eyes: Prevent eye contact (solution) 

 Frostbite 

Wash skin: When contam (solution) 

Remove: When wet (flamm) 

Change: N.R. 

Provide: Frostbite wash 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

100 ppm: CcrFS/GmFS/PaprS£/ 

 ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFS/ScbaE 

Incompatibilities and Reactivities: Mercury, strong oxidizers, nitromethane 

[Note: Corrosive to copper & zinc alloys, aluminum & galvanized surfaces.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs (solution), Ing (solution), Con (solution/liquid) 

SY: Irrit eyes, skin, resp sys; cough; skin, muc memb burns; 

derm; conj; liquid: frostbite 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed (solution)/Frostbite 

Skin: Water flush immed (solution)/Frostbite 

Breath: Resp support 

Swallow: Medical attention immed (solution) 
201

M 

Methyl (n-amyl) ketone Formula: 

CH3CO[CH2]4CH3

CAS#: 

110-43-0 

RTECS#: 

MJ5075000 

IDLH: 

800 ppm 

Conversion: 1 ppm = 4.67 mg/m3 DOT: 1110 127 

Synonyms/Trade Names: Amyl methyl ketone, n-Amyl methyl ketone, 2-Heptanone 

Exposure Limits: 

NIOSH REL: TWA 100 ppm (465 mg/m3

) 

OSHA PEL: TWA 100 ppm (465 mg/m3

) 

Physical Description: Colorless to white liquid with a banana-like, fruity odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1301, 2553 

Chemical & Physical 

Properties: 

MW: 114.2 

BP: 305°F 

Sol: 0.4% 

Fl.P: 102°F 

IP: 9.33 eV 

Sp.Gr: 0.81 

VP: 3 mmHg 

FRZ: -32°F 

UEL(250°F): 7.9% 

LEL(151°F): 1.1% 

Class II Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

800 ppm: CcrOv*/PaprOv*/GmFOv/ 

 Sa*/ScbaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong acids, alkalis & oxidizers [Note: Will attack some forms of plastic.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, muc memb; head; narco, coma; derm 

TO: Eyes, skin, resp sys, CNS, PNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash 

Breath: Fresh air 

Swallow: Medical attention immed 

Methyl bromide Formula: 

CH3Br 

CAS#: 

74-83-9 

RTECS#: 

PA4900000 

IDLH: 

Ca [250 ppm] 

Conversion: 1 ppm = 3.89 mg/m3 DOT: 1062 123 

Synonyms/Trade Names: Bromomethane, Monobromomethane 

Exposure Limits: 

NIOSH REL: Ca 

 See Appendix A 

OSHA PEL†: C 20 ppm (80 mg/m3

) [skin] 

Physical Description: Colorless gas with a chloroform-like odor at high 

concentrations. [Note: A liquid below 38°F. Shipped as a liquefied compressed gas.] 

Measurement Methods 

(see Table 1): 

NIOSH 2520 

OSHA PV2040 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact (liquid) 

Eyes: Prevent eye contact (liquid) 

Wash skin: When contam (liquid) 

Remove: When wet (flamm) 

Change: N.R. 

Provide: Quick drench (liquid) 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Chemical & Physical Properties: 

MW: 95.0 

BP: 38°F 

Sol: 2% 

Fl.P: NA (Gas) 

IP: 10.54 eV 

RGasD: 3.36 

Sp.Gr: 1.73 (Liquid at 32°F) 

VP: 1.9 atm 

FRZ: -137°F 

UEL: 16.0% 

LEL: 10% 

Flammable Gas, but only in 

presence of a high energy ignition 

source. 

Incompatibilities and Reactivities: Aluminum, magnesium, strong oxidizers 

[Note: Attacks aluminum to form aluminum trimethyl, which is 

SPONTANEOUSLY flammable.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs (liquid), Con (liquid) 

SY: Irrit eyes, skin, resp sys; musc weak, inco, vis dist, dizz; nau, vomit, head; 

mal; hand tremor; convuls; dysp; skin vesic; liquid: frostbite; [carc] 

TO: Eyes, skin, resp sys, CNS [in animals: lung, kidney & forestomach tumors] 

First Aid (see Table 6): 

Eye: Irr immed (liquid) 

Skin: Water flush immed (liquid) 

Breath: Resp support 
202

M 

Methyl Cellosolve® Formula: 

CH3OCH2CH2OH

CAS#: 

109-86-4 

RTECS#: 

KL5775000 

IDLH: 

200 ppm 

Conversion: 1 ppm = 3.11 mg/m3 DOT: 1188 127 

Synonyms/Trade Names: EGME, Ethylene glycol monomethyl ether, Glycol monomethyl ether, 2-Methoxyethanol 

Exposure Limits: 

NIOSH REL: TWA 0.1 ppm (0.3 mg/m3

) [skin] 

OSHA PEL: TWA 25 ppm (80 mg/m3

) [skin] 

Physical Description: Colorless liquid with a mild, ether-like odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1403 

OSHA 53, 79 

Chemical & Physical 

Properties: 

MW: 76.1 

BP: 256°F 

Sol: Miscible 

Fl.P: 102°F 

IP: 9.60 eV 

Sp.Gr: 0.96 

VP: 6 mmHg 

FRZ: -121°F 

UEL: 14% 

LEL: 1.8% 

Class II Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

1 ppm: Sa* 

2.5 ppm: Sa:Cf* 

5 ppm: ScbaF/SaF 

100 ppm: Sa:Pd,Pp* 

200 ppm: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, caustics 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, nose, throat; head, drow, lass; ataxia, tremor; 

anemic pallor; in animals: repro, terato effects 

TO: Eyes, resp sys, CNS, blood, kidneys, repro sys, hemato sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush prompt 

Breath: Resp support 

Swallow: Medical attention immed 

Methyl Cellosolve® acetate Formula: 

CH3COOCH2CH2OCH3

CAS#: 

110-49-6 

RTECS#: 

KL5950000 

IDLH: 

200 ppm 

Conversion: 1 ppm = 4.83 mg/m3 DOT: 1189 129 

Synonyms/Trade Names: EGMEA, Ethylene glycol monomethyl ether acetate, Glycol monomethyl ether acetate, 

2-Methoxyethyl acetate 

Exposure Limits: 

NIOSH REL: TWA 0.1 ppm (0.5 mg/m3

 [skin] 

OSHA PEL: TWA 25 ppm (120 mg/m3

) [skin] 

Physical Description: Colorless liquid with a mild, ether-like odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1451 

OSHA 53, 79 

Chemical & Physical 

Properties: 

MW: 118.1 

BP: 293°F 

Sol: Miscible 

Fl.P: 120°F 

IP: ? 

Sp.Gr: 1.01 

VP: 2 mmHg 

FRZ: -85°F 

UEL: 8.2% 

LEL: 1.7% 

Class II Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

1 ppm: Sa* 

2.5 ppm: Sa:Cf* 

5 ppm: ScbaF/SaF 

100 ppm: Sa:Pd,Pp* 

200 ppm: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Nitrates; strong oxidizers, alkalis & acids 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, nose, throat; kidney, brain damage; in animals: narco; 

repro, terato effects 

TO: Eyes, resp sys, kidneys, brain, CNS, PNS, repro sys, hemato sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush prompt 

Breath: Resp support 

Swallow: Medical attention immed 
203

M 

Methyl chloride Formula: 

CH3Cl 

CAS#: 

74-87-3 

RTECS#: 

PA6300000 

IDLH: 

Ca [2000 ppm] 

Conversion: 1 ppm = 2.07 mg/m3 DOT: 1063 115 

Synonyms/Trade Names: Chloromethane, Monochloromethane 

Exposure Limits: 

NIOSH REL: Ca 

 See Appendix A 

OSHA PEL†: TWA 100 ppm 

 C 200 ppm 

 300 ppm (5-minute maximum peak in any 3 hours) 

Measurement Methods 

(see Table 1): 

NIOSH 1001 

Physical Description: Colorless gas with a faint, sweet odor which is not noticeable at dangerous concentrations. 

[Note: Shipped as a liquefied compressed gas.] 

Chemical & Physical Properties: 

MW: 50.5 

BP: -12°F 

Sol: 0.5% 

Fl.P: NA (Gas) 

IP: 11.28 eV 

RGasD: 1.78 

VP: 5.0 atm 

FRZ: -144°F 

UEL: 17.4% 

LEL: 8.1% 

Flammable Gas 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Frostbite 

Eyes: Frostbite 

Wash skin: N.R. 

Remove: When wet (flamm) 

Change: N.R. 

Provide: Frostbite wash 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: ScbaE 

Incompatibilities and Reactivities: Chemically-active metals such as potassium, powdered aluminum, zinc, 

and magnesium; water [Note: Reacts with water (hydrolyzes) to form hydrochloric acid.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con (liquid) 

SY: Dizz, nau, vomit; vis dist, stagger, slurred speech, convuls, coma; 

liver, kidney damage; liquid: frostbite; repro, terato effects; [carc] 

TO: CNS, liver, kidneys, repro sys [in animals: lung, kidney & 

forestomach tumors] 

First Aid (see Table 6): 

Eye: Frostbite 

Skin: Frostbite 

Breath: Resp support 

Methyl chloroform Formula: 

CH3CCl3

CAS#: 

71-55-6 

RTECS#: 

KJ2975000 

IDLH: 

700 ppm 

Conversion: 1 ppm = 5.46 mg/m3 DOT: 2831 160 

Synonyms/Trade Names: Chlorothene; 1,1,1-Trichloroethane; 1,1,1-Trichloroethane (stabilized) 

Exposure Limits: 

NIOSH REL: C 350 ppm (1900 mg/m3

) [15-minute] 

 See Appendix C (Chloroethanes) 

OSHA PEL†: TWA 350 ppm (1900 mg/m3

) 

Physical Description: Colorless liquid with a mild, chloroform-like odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1003 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

700 ppm: Sa*/ScbaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Chemical & Physical Properties: 

MW: 133.4 

BP: 165°F 

Sol: 0.4% 

Fl.P: ? 

IP: 11.00 eV 

Sp.Gr: 1.34 

VP: 100 mmHg 

FRZ: -23°F 

UEL: 12.5% 

LEL: 7.5% 

Combustible Liquid, but burns with 

difficulty. 

Incompatibilities and Reactivities: Strong caustics; strong oxidizers; 

chemically-active metals such as zinc, aluminum, magnesium powders, 

sodium & potassium; water 

[Note: Reacts slowly with water to form hydrochloric acid.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin; head, lass, CNS depres, poor equi; derm; 

card arrhy; liver damage 

TO: Eyes, skin, CNS, CVS, liver 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 
204

M 

Methyl-2-cyanoacrylate Formula: 

CH2=C(CN)COOCH3

CAS#: 

137-05-3 

RTECS#: 

AS7000000 

IDLH: 

N.D. 

Conversion: 1 ppm = 4.54 mg/m3 DOT: 

Synonyms/Trade Names: Mecrylate, Methyl cyanoacrylate, Methyl α-cyanoacrylate, 

Methyl ester of 2-cyanoacrylic acid 

Exposure Limits: 

NIOSH REL: TWA 2 ppm (8 mg/m3

) 

 ST 4 ppm (16 mg/m3

) 

OSHA PEL†: none 

Physical Description: Colorless liquid with a characteristic odor. 

Measurement Methods 

(see Table 1): 

OSHA 55 

Chemical & Physical Properties: 

MW: 111.1 

BP: ? 

Sol: 30% 

Fl.P: 174°F 

IP: ? 

Sp.Gr(81°F): 1.10 

VP(77°F): 0.2 mmHg 

FRZ: ? 

UEL: ? 

LEL: ? 

Class IIIA Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: Daily 

Remove: N.R. 

Change: N.R. 

Provide: Eyewash 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Moisture [Note: Contact with moisture causes rapid polymerization.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, nose; blurred vision, lac; rhinitis 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water wash 

Breath: Resp support 

Swallow: Medical attention immed 

Methylcyclohexane Formula: 

CH3C6H11

CAS#: 

108-87-2 

RTECS#: 

GV6125000 

IDLH: 

1200 ppm [LEL] 

Conversion: 1 ppm = 4.02 mg/m3 DOT: 2296 128 

Synonyms/Trade Names: Cyclohexylmethane, Hexahydrotoluene 

Exposure Limits: 

NIOSH REL: TWA 400 ppm (1600 mg/m3

) 

OSHA PEL†: TWA 500 ppm (2000 mg/m3

) 

Physical Description: Colorless liquid with a faint, benzene-like odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1500 

OSHA 7 

Chemical & Physical 

Properties: 

MW: 98.2 

BP: 214°F 

Sol: Insoluble 

Fl.P: 25°F 

IP: 9.85 eV 

Sp.Gr: 0.77 

VP: 37 mmHg 

FRZ: -196°F 

UEL: 6.7% 

LEL: 1.2% 

Class IB Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

1200 ppm: Sa/ScbaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, nose, throat; dizz, drow; in animals: narco 

TO: Eyes, skin, resp sys, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 
205

M 

Methylcyclohexanol Formula: 

CH3C6H10OH 

CAS#: 

25639-42-3 

RTECS#: 

GW0175000 

IDLH: 

500 ppm 

Conversion: 1 ppm = 4.67 mg/m3 DOT: 2617 129 

Synonyms/Trade Names: Hexahydrocresol, Hexahydromethylphenol 

Exposure Limits: 

NIOSH REL: TWA 50 ppm (235 mg/m3

) 

OSHA PEL†: TWA 100 ppm (470 mg/m3

) 

Physical Description: Straw-colored liquid with a weak odor like coconut oil. 

Measurement Methods 

(see Table 1): 

NIOSH 1404 

Chemical & Physical 

Properties: 

MW: 114.2 

BP: 311-356°F 

Sol: 4% 

Fl.P: 149-158°F 

IP: 9.80 eV 

Sp.Gr: 0.92 

VP(86°F): 2 mmHg 

FRZ: -58°F 

UEL: ? 

LEL: ? 

Class IIIA Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

500 ppm: Sa*/ScbaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, upper resp sys; head; in animals: narco; liver, 

kidney damage 

TO: Eyes, skin, resp sys, CNS, kidneys, liver 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 

o-Methylcyclohexanone Formula: 

CH3C6H9O 

CAS#: 

583-60-8 

RTECS#: 

GW1750000 

IDLH: 

600 ppm 

Conversion: 1 ppm = 4.59 mg/m3 DOT: 2297 128 

Synonyms/Trade Names: 2-Methylcyclohexanone 

Exposure Limits: 

NIOSH REL: TWA 50 ppm (230 mg/m3

) [skin] 

 ST 75 ppm (345 mg/m3

) 

OSHA PEL†: TWA 100 ppm (460 mg/m3

) [skin] 

Physical Description: Colorless liquid with a weak, peppermint-like odor. 

Measurement Methods 

(see Table 1): 

NIOSH 2521 

Chemical & Physical 

Properties: 

MW: 112.2 

BP: 325°F 

Sol: Insoluble 

Fl.P: 118°F 

IP: ? 

Sp.Gr: 0.93 

VP: 1 mmHg 

FRZ: 7°F 

UEL: ? 

LEL: ? 

Class II Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

500 ppm: Sa* 

600 ppm: Sa:Cf*/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: In animals: irrit eyes, muc memb; narco; derm 

TO: Skin, resp sys, liver, kidneys, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 
206

M 

Methyl cyclopentadienyl 

manganese tricarbonyl (as Mn) 

Formula: 

CH3C5H4Mn(CO)3

CAS#: 

12108-13-3 

RTECS#: 

OP1450000 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: CI-2, Combustion Improver-2, Manganese tricarbonylmethylcyclopentadienyl, 

2-Methylcyclopentadienyl manganese tricarbonyl, MMT 

Exposure Limits: 

NIOSH REL: TWA 0.2 mg/m3

 [skin] 

OSHA PEL†: C 5 mg/m3

Physical Description: Yellow to dark-orange liquid with a faint, pleasant odor. 

[Note: A solid below 36°F.] 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical Properties: 

MW: 218.1 

BP: 449°F 

Sol: Insoluble 

Fl.P: 230°F 

IP: ? 

Sp.Gr: 1.39 

VP(212°F): 7 mmHg 

FRZ: 36°F 

UEL: ? 

LEL: ? 

Class IIIB Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Light (decomposes) 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes; dizz, nau, head; in animals: tremor, severe clonic 

spasms, lass, slow respiration; liver, kidney inj 

TO: Eyes, CNS, liver, kidneys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

Methyl demeton Formula: 

C6H15O3PS2

CAS#: 

8022-00-2 

RTECS#: 

TG1760000 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: Demeton methyl; O,O-Dimethyl 2-ethylmercaptoethyl thiophosphate; Metasystox®; 

Methyl mercaptophos; Methyl systox® 

Exposure Limits: 

NIOSH REL: TWA 0.5 mg/m3

 [skin] 

OSHA PEL†: none 

Physical Description: Oily, colorless to pale-yellow liquid with an unpleasant odor. 

[insecticide] [Note: Technical grade consists of 2 isomers: thiono & thiolo.] 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical Properties: 

MW: 230.3 

BP: Decomposes 

Sol: 0.03-0.3% 

Fl.P: ? 

IP: ? 

Sp.Gr: 1.20 

VP: 0.0004 mmHg 

FRZ: ? 

UEL: ? 

LEL: ? 

Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Strong oxidizers, alkalis, water 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin; ache eyes, rhin; nau, head, dizz, vomit 

TO: Eyes, skin, resp sys, CNS, CVS, blood chol 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 
207

M 

4,4'-Methylenebis(2-chloroaniline) Formula: 

CH2(C6H4ClNH2)2

CAS#: 

101-14-4 

RTECS#: 

CY1050000 

IDLH: 

Ca [N.D.] 

Conversion: DOT: 

Synonyms/Trade Names: DACPM; 3,3'-Dichloro-4,4'-diaminodiphenylmethane; MBOCA; 

4,4'-Methylenebis(o-chloro aniline); 4,4'-Methylenebis(2-chlorobenzenamine); MOCA 

Exposure Limits: 

NIOSH REL: Ca 

 TWA 0.003 mg/m3

 [skin] 

 See Appendix A 

OSHA PEL†: none 

Physical Description: Tan-colored pellets or flakes with a faint, amine-like odor. 

Measurement Methods 

(see Table 1): 

OSHA 24, 71 

Chemical & Physical 

Properties: 

MW: 267.2 

BP: ? 

Sol: Slight 

Fl.P: ? 

IP: ? 

Sp.Gr: 1.44 

VP(77°F): 0.00001 mmHg 

MLT: 230°F 

UEL: ? 

LEL: ? 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam/Daily 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Incompatibilities and Reactivities: Chemically-active metals (e.g., potassium, sodium, magnesium, zinc) 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Hema, cyan, nau, methemo, kidney irrit; [carc] 

TO: Liver, blood, kidneys [in animals: liver, lung & bladder tumors] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

Methylene bis(4-cyclohexylisocyanate) Formula: 

CH2[(C6H10)NCO]2

CAS#: 

5124-30-1 

RTECS#: 

NQ9250000 

IDLH: 

N.D. 

Conversion: 1 ppm = 10.73 mg/m3 DOT: 

Synonyms/Trade Names: Dicyclohexylmethane 4,4'-diisocyanate; DMDI; bis(4-Isocyanatocyclohexyl)methane; 

HMDI; Hydrogenated MDI; Reduced MDI; Saturated MDI 

Exposure Limits: 

NIOSH REL: C 0.01 ppm (0.11 mg/m3

) 

OSHA PEL†: none 

Physical Description: Clear, colorless to light-yellow liquid. 

Measurement Methods 

(see Table 1): 

NIOSH 5525 

OSHA PV2092 

Chemical & Physical 

Properties: 

MW: 262.4 

BP: ? 

Sol: Reacts 

Fl.P: >395°F 

IP: ? 

Sp.Gr(77°F): 1.07 

VP(77°F): 0.001 mmHg 

FRZ: <14°F 

UEL: ? 

LEL: ? 

Class IIIB Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

0.1 ppm: Sa* 

0.25 ppm: Sa:Cf* 

0.5 ppm: ScbaF/SaF 

1 ppm: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Water, ethanol, alcohols, amines, bases, acids, organotin catalysts 

[Note: May slowly polymerize if heated above 122°F.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, resp sys; skin, resp sens; chest tight, dysp, 

cough, dry throat, wheez, pulm edema; skin blisters 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 
208

M 

Methylene bisphenyl isocyanate Formula: 

CH2(C6H4NCO)2

CAS#: 

101-68-8 

RTECS#: 

NQ9350000 

IDLH: 

75 mg/m3

Conversion: 1 ppm = 10.24 mg/m3 DOT: 

Synonyms/Trade Names: 4,4'-Diphenylmethane diisocyanate; MDI; Methylene bis(4-phenyl isocyanate); 

Methylene di-p-phenylene ester of isocyanic acid 

Exposure Limits: 

NIOSH REL: TWA 0.05 mg/m3

 (0.005 ppm) 

 C 0.2 mg/m3

 (0.020 ppm) [10-minute] 

OSHA PEL: C 0.2 mg/m3

 (0.02 ppm) 

Measurement Methods 

(see Table 1): 

NIOSH 5521, 5522, 5525 

OSHA 18 

Physical Description: White to light-yellow, odorless flakes. [Note: A liquid above 99°F.] 

Chemical & Physical Properties: 

MW: 250.3 

BP: 597°F 

Sol: 0.2% 

Fl.P: 390°F 

IP: ? 

Sp.Gr: 1.23 (Solid at 77°F) 

 1.19 (Liquid at 122°F) 

VP(77°F): 0.000005 mmHg 

MLT: 99°F 

UEL: ? 

LEL: ? 

Combustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

0.5 mg/m3

: Sa* 

1.25 mg/m3

: Sa:Cf* 

2.5 mg/m3

: ScbaF/SaF 

75 mg/m3

: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Incompatibilities and Reactivities: Strong alkalis, acids, alcohol [Note: Polymerizes at 450°F.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, nose, throat; resp sens; cough, pulm secretions, 

chest pain, dysp; asthma 

TO: Eyes, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

Methylene chloride Formula: 

CH2Cl2

CAS#: 

75-09-2 

RTECS#: 

PA8050000 

IDLH: 

Ca [2300 ppm]

Conversion: 1 ppm = 3.47 mg/m3 DOT: 1593 160 

Synonyms/Trade Names: Dichloromethane, Methylene dichloride 

Exposure Limits: 

NIOSH REL: Ca 

 See Appendix A 

OSHA PEL: [1910.1052] TWA 25 ppm 

 ST 125 ppm 

Measurement Methods 

(see Table 1): 

NIOSH 1005, 3800 

OSHA 59, 80 

Physical Description: Colorless liquid with a chloroform-like odor. [Note: A gas above 104°F.] 

Chemical & Physical 

Properties: 

MW: 84.9 

BP: 104°F 

Sol: 2% 

Fl.P: ? 

IP: 11.32 eV 

Sp.Gr: 1.33 

VP: 350 mmHg 

FRZ: -139°F 

UEL: 23% 

LEL: 13% 

Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

See Appendix E (page 351) 

Incompatibilities and Reactivities: Strong oxidizers; caustics; chemically-active metals such as aluminum, 

magnesium powders, potassium & sodium; concentrated nitric acid 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin; lass, drow, dizz; numb, tingle limbs; nau; [carc] 

TO: Eyes, skin, CVS, CNS [in animals: lung, liver, salivary & mammary 

gland tumors] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 
209

M 

4,4'-Methylenedianiline Formula: 

CH2(C6H4NH2)2

CAS#: 

101-77-9 

RTECS#: 

BY5425000 

IDLH: 

Ca [N.D.] 

Conversion: DOT: 

Synonyms/Trade Names: 4,4'-Diaminodiphenylmethane; para, para'-Diaminodiphenyl-methane; 

Dianilinomethane; 4,4'-Diphenylmethanediamine; MDA 

Exposure Limits: 

NIOSH REL: Ca 

 See Appendix A 

OSHA PEL: [1910.1050] TWA 0.010 ppm 

 ST 0.100 ppm 

Physical Description: Pale-brown, crystalline solid with a faint, amine-like odor. 

Measurement Methods 

(see Table 1): 

NIOSH 5029 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam/Daily 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

See Appendix E (page 351) 

Chemical & Physical Properties: 

MW: 198.3 

BP: 748°F 

Sol: 0.1% 

Fl.P: 374°F 

IP: 10.70 eV 

Sp.Gr: 1.06 (Liquid at 212°F) 

VP(77°F): 0.0000002 mmHg 

MLT: 198°F 

UEL: ? 

LEL: ? 

Combustible Solid Incompatibilities and Reactivities: Strong oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes; jaun, hepatitis; myocardial damage; in animals: 

heart, liver, spleen damage; [carc] 

TO: Eyes, liver, CVS, spleen [in animals: bladder cancer] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

Methyl ethyl ketone peroxide Formula: 

C8H16O4

CAS#: 

1338-23-4 

RTECS#: 

EL9450000 

IDLH: 

N.D. 

Conversion: 1 ppm = 7.21 mg/m3 DOT: 

Synonyms/Trade Names: 2-Butanone peroxide, Ethyl methyl ketone peroxide, MEKP, MEK peroxide, 

Methyl ethyl ketone hydroperoxide 

Exposure Limits: 

NIOSH REL: C 0.2 ppm (1.5 mg/m3

) 

OSHA PEL†: none 

Physical Description: Colorless liquid with a characteristic odor. 

[Note: Explosive decomposition occurs at 230°F.] 

Measurement Methods 

(see Table 1): 

NIOSH 3508 

OSHA 77 

Chemical & Physical Properties: 

MW: 176.2 

BP: 244°F (Decomposes) 

Sol: Soluble 

Fl.P(oc): 125-200°F (60% MEKP) 

IP: ? 

Sp.Gr(59°F): 1.12 

VP: ? 

FRZ: ? 

UEL: ? 

LEL: ? 

Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Organic materials, heat, flames, sunlight, trace contaminants 

[Note: A strong oxidizing agent. Pure MEKP is shock sensitive. Commercial product is diluted with 40% dimethyl 

phthalate, cyclohexane peroxide, or diallyl phthalate to reduce sensitivity to shock.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, nose, throat; cough, dysp, pulm edema; 

blurred vision; blisters, scars skin; abdom pain, vomit, diarr; 

derm; in animals: liver, kidney damage 

TO: Eyes, skin, resp sys, liver, kidneys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water wash immed 

Breath: Resp support 

Swallow: Medical attention immed 
210

M 

Methyl formate Formula: 

HCOOCH3

CAS#: 

107-31-3 

RTECS#: 

LQ8925000 

IDLH: 

4500 ppm 

Conversion: 1 ppm = 2.46 mg/m3 DOT: 1243 129 

Synonyms/Trade Names: Methyl ester of formic acid, Methyl methanoate 

Exposure Limits: 

NIOSH REL: TWA 100 ppm (250 mg/m3

) 

 ST 150 ppm (375 mg/m3

) 

OSHA PEL†: TWA 100 ppm (250 mg/m3

) 

Physical Description: Colorless liquid with a pleasant odor. 

[Note: A gas above 89°F.] 

Measurement Methods 

(see Table 1): 

NIOSH S291 (II-5) 

OSHA PV2041 

Chemical & Physical 

Properties: 

MW: 60.1 

BP: 89°F 

Sol: 30% 

Fl.P: -2°F 

IP: 10.82 eV 

Sp.Gr: 0.98 

VP: 476 mmHg 

FRZ: -148°F 

UEL: 23% 

LEL: 4.5% 

Class IA Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

1000 ppm: Sa* 

2500 ppm: Sa:Cf* 

4500 ppm: ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers 

[Note: Reacts slowly with water to form methanol & formic acid.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, nose; chest tight, dysp; vis dist; CNS depres; in 

animals: pulm edema; narco 

TO: Eyes, resp sys, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

5-Methyl-3-heptanone Formula: 

C2H5COCH2CH(CH3)CH2CH3

CAS#: 

541-85-5 

RTECS#: 

MJ7350000 

IDLH: 

100 ppm 

Conversion: 1 ppm = 5.24 mg/m3 DOT: 2271 127 

Synonyms/Trade Names: Amyl ethyl ketone, Ethyl amyl ketone, 3-Methyl-5-heptanone 

Exposure Limits: 

NIOSH REL: TWA 25 ppm (130 mg/m3

) 

OSHA PEL: TWA 25 ppm (130 mg/m3

) 

Physical Description: Colorless liquid with a pungent odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1301, 2553 

Chemical & Physical 

Properties: 

MW: 128.2 

BP: 315°F 

Sol: Insoluble 

Fl.P: 138°F 

IP: ? 

Sp.Gr: 0.82 

VP: 2 mmHg 

FRZ: -70°F 

UEL: ? 

LEL: ? 

Class II Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

100 ppm: CcrOv*/PaprOv*/GmFOv/ 

 Sa*/ScbaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, muc memb; head; narco, coma; derm 

TO: Eyes, skin, resp sys, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush 

Breath: Resp support 

Swallow: Medical attention immed 
211

M 

Methyl hydrazine Formula: 

CH3NHNH2

CAS#: 

60-34-4 

RTECS#: 

MV5600000 

IDLH: 

Ca [20 ppm] 

Conversion: 1 ppm = 1.89 mg/m3 DOT: 1244 131 

Synonyms/Trade Names: MMH, Monomethylhydrazine 

Exposure Limits: 

NIOSH REL: Ca 

 C 0.04 ppm (0.08 mg/m3

) [2-hr] 

 See Appendix A 

OSHA PEL: C 0.2 ppm (0.35 mg/m3

) [skin] 

Physical Description: Fuming, colorless liquid with an ammonia-like odor. 

Measurement Methods 

(see Table 1): 

NIOSH 3510 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: ScbaE 

Chemical & Physical Properties: 

MW: 46.1 

BP: 190°F 

Sol: Miscible 

Fl.P: 17°F 

IP: 8.00 eV 

Sp.Gr(77°F): 0.87 

VP: 38 mmHg 

FRZ: -62°F 

UEL: 92% 

LEL: 2.5% 

Class IB Flammable Liquid 

Incompatibilities and Reactivities: Oxides of iron; copper; manganese; 

lead; copper alloys; porous materials such as earth, asbestos, wood & cloth; 

strong oxidizers such as fluorine & chlorine; nitric acid; hydrogen peroxide 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, resp sys; vomit, diarr, tremor, ataxia; anoxia, 

cyan; convuls; [carc] 

TO: Eyes, skin, resp sys, CNS, liver, blood, CVS [in animals: lung, 

liver, blood vessel & intestine tumors] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

Methyl iodide Formula: 

CH3I 

CAS#: 

74-88-4 

RTECS#: 

PA9450000 

IDLH: 

Ca [100 ppm] 

Conversion: 1 ppm = 5.80 mg/m3 DOT: 2644 151 

Synonyms/Trade Names: Iodomethane, Monoiodomethane 

Exposure Limits: 

NIOSH REL: Ca 

 TWA 2 ppm (10 mg/m3

) [skin] 

 See Appendix A 

OSHA PEL: TWA 5 ppm (28 mg/m3

) [skin] 

Physical Description: Colorless liquid with a pungent, ether-like odor. 

[Note: Turns yellow, red, or brown on exposure to light & moisture.] 

Measurement Methods 

(see Table 1): 

NIOSH 1014 

Chemical & Physical Properties: 

MW: 141.9 

BP: 109°F 

Sol: 1% 

Fl.P: NA 

IP: 9.54 eV 

Sp.Gr: 2.28 

VP: 400 mmHg 

FRZ: -88°F 

UEL: NA 

LEL: NA 

Noncombustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers [Note: Decomposes at 518°F.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, resp sys; nau, vomit; dizz, ataxia; slurred 

speech, drow; derm; [carc] 

TO: Eyes, skin, resp sys, CNS [in animals: lung, kidney & 

forestomach tumors] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap flush immed 

Breath: Resp support 

Swallow: Medical attention immed 
212

M 

Methyl isoamyl ketone Formula: 

CH3COCH2CH2CH(CH3)2

CAS#: 

110-12-3 

RTECS#: 

MP3850000 

IDLH: 

N.D. 

Conversion: 1 ppm = 4.67 mg/m3 DOT: 2302 127 

Synonyms/Trade Names: Isoamyl methyl ketone, Isopentyl methyl ketone, 2-Methyl-5-hexanone, 

5-Methyl-2-hexanone, MIAK 

Exposure Limits: 

NIOSH REL: TWA 50 ppm (240 mg/m3

) 

OSHA PEL†: TWA 100 ppm (475 mg/m3

) 

Physical Description: Colorless, clear liquid with a pleasant, fruity odor. 

Measurement Methods 

(see Table 1): 

OSHA PV2042 

Chemical & Physical 

Properties: 

MW: 114.2 

BP: 291°F 

Sol: 0.5% 

Fl.P: 97°F 

IP: 9.284 eV 

Sp.Gr: 0.81 

VP: 5 mmHg 

FRZ: -101°F 

UEL(200°F): 8.2% 

LEL(200°F): 1.0% 

Class IC Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

500 ppm: CcrOv*/Sa* 

1250 ppm: Sa:Cf*/PaprOv* 

2500 ppm: CcrFOv/GmFOv/PaprTOv*/ 

 SaT:Cf*/ScbaF/SaF 

5000 ppm: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, muc memb; head, narco, coma; derm; in 

animals: liver, kidney damage 

TO: Eyes, skin, resp sys, CNS, liver, kidneys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap flush prompt 

Breath: Resp support 

Swallow: Medical attention immed 

Methyl isobutyl carbinol Formula: 

(CH3)2CHCH2CH(OH)CH3

CAS#: 

108-11-2 

RTECS#: 

SA7350000 

IDLH: 

400 ppm 

Conversion: 1 ppm = 4.18 mg/m3 DOT: 2053 129 

Synonyms/Trade Names: Isobutylmethylcarbinol, Methyl amyl alcohol, 4-Methyl-2-pentanol, MIBC 

Exposure Limits: 

NIOSH REL: TWA 25 ppm (100 mg/m3

) 

 ST 40 ppm (165 mg/m3

) [skin] 

OSHA PEL†: TWA 25 ppm (100 mg/m3

) [skin] 

Physical Description: Colorless liquid with a mild odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1402, 1405 

OSHA 7 

Chemical & Physical 

Properties: 

MW: 102.2 

BP: 271°F 

Sol: 2% 

Fl.P: 106°F 

IP: ? 

Sp.Gr: 0.81 

VP: 3 mmHg 

FRZ: -130°F 

UEL: 5.5% 

LEL: 1.0% 

Class II Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

250 ppm: Sa* 

400 ppm: Sa:Cf*/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin; head, drow; derm; in animals: narco 

TO: Eyes, skin, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush prompt 

Breath: Resp support 

Swallow: Medical attention immed 
213

M 

Methyl isocyanate Formula: 

CH3NCO 

CAS#: 

624-83-9 

RTECS#: 

NQ9450000 

IDLH: 

3 ppm 

Conversion: 1 ppm = 2.34 mg/m3 DOT: 2480 155 

Synonyms/Trade Names: Methyl ester of isocyanic acid, MIC 

Exposure Limits: 

NIOSH REL: TWA 0.02 ppm (0.05 mg/m3

) [skin] 

OSHA PEL: TWA 0.02 ppm (0.05 mg/m3

) [skin] 

Physical Description: Colorless liquid with a sharp, pungent odor. 

Measurement Methods 

(see Table 1): 

OSHA 54 

Chemical & Physical 

Properties: 

MW: 57.1 

BP: 102-104°F 

Sol(59°F): 10% 

Fl.P: 19°F 

IP: 10.67 eV 

Sp.Gr: 0.96 

VP: 348 mmHg 

FRZ: -49°F 

UEL: 26% 

LEL: 5.3% 

Class IB Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

0.2 ppm: Sa* 

0.5 ppm: Sa:Cf* 

1 ppm: ScbaF/SaF 

3 ppm: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Water, oxidizers, acids, alkalis, amines, iron, tin, copper 

[Note: Usually contains inhibitors to prevent polymerization.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, nose, throat; resp sens, cough, pulm secretions, 

chest pain, dysp; asthma; eye, skin damage; in animals: pulm edema 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

Methyl isopropyl ketone Formula: 

CH3COCH(CH3)2

CAS#: 

563-80-4 

RTECS#: 

EL9100000 

IDLH: 

N.D. 

Conversion: 1 ppm = 3.53 mg/m3 DOT: 2397 127 

Synonyms/Trade Names: 2-Acetyl propane, Isopropyl methyl ketone, 3-Methyl-2-butanone, 

3-Methyl butan-2-one, MIPK 

Exposure Limits: 

NIOSH REL: TWA 200 ppm (705 mg/m3

) 

OSHA PEL†: none 

Physical Description: Colorless liquid with an acetone-like odor. 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical Properties: 

MW: 86.2 

BP: 199°F 

Sol: Very slight 

Fl.P: ? 

IP: 9.32 eV 

Sp.Gr: 0.81 

VP: 42 mmHg 

FRZ: -134°F 

UEL: ? 

LEL: ? 

Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, muc memb, resp sys; cough 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 
M 

Methyl mercaptan Formula: 

CH3SH 

CAS#: 

74-93-1 

RTECS#: 

PB4375000 

IDLH: 

150 ppm 

Conversion: 1 ppm = 1.97 mg/m3 DOT: 1064 117 

Synonyms/Trade Names: Mercaptomethane, Methanethiol, Methyl sulfhydrate 

Exposure Limits: 

NIOSH REL: C 0.5 ppm (1 mg/m3) [15-minute] 

OSHA PEL†: C 10 ppm (20 mg/m3

) 

Physical Description: Colorless gas with a disagreeable odor like garlic or rotten 

cabbage. [Note: A liquid below 43°F. Shipped as a liquefied compressed gas.] 

Measurement Methods 

(see Table 1): 

NIOSH 2542 

OSHA 26 

Chemical & Physical 

Properties: 

MW: 48.1 

BP: 43°F 

Sol: 2% 

Fl.P: NA (Gas) 

 (oc) 0°F (Liquid) 

IP: 9.44 eV 

RGasD: 1.66 

Sp.Gr: 0.90 (Liquid at 32°F) 

VP: 1.7 atm 

FRZ: -186°F 

UEL: 21.8% 

LEL: 3.9% 

Flammable Gas 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact (liquid) 

 Frostbite 

Eyes: Prevent eye contact (liquid) 

 Frostbite 

Wash skin: N.R. 

Remove: When wet (flamm) 

Change: N.R. 

Provide: Eyewash (liquid) 

 Quick drench (liquid) 

 Frostbite wash 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

5 ppm: CcrOv/Sa 

12.5 ppm: Sa:Cf/PaprOv 

25 ppm: CcrFOv/GmFOv/PaprTOv/ 

 SaT:Cf/ScbaF/SaF 

150 ppm: Sa:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, bleaches, copper, aluminum, nickel-copper alloys 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con (liquid) 

SY: Irrit eyes, skin, resp sys; narco; cyan; convuls; liquid: frostbite 

TO: Eyes, skin, resp sys, CNS, blood 

First Aid (see Table 6): 

Eye: Irr immed (liquid)/Frostbite 

Skin: Water flush immed (liquid)/Frostbite 

Breath: Resp support 

Methyl methacrylate Formula: 

CH2=C(CH3)COOCH3

CAS#: 

80-62-6 

RTECS#: 

OZ5075000 

IDLH: 

1000 ppm 

Conversion: 1 ppm = 4.09 mg/m3 DOT: 1247 129P (inhibited) 

Synonyms/Trade Names: Methacrylate monomer, Methyl ester of methacrylic acid, Methyl-2-methyl-2-propenoate 

Exposure Limits: 

NIOSH REL: TWA 100 ppm (410 mg/m3

) 

OSHA PEL: TWA 100 ppm (410 mg/m3

) 

Physical Description: Colorless liquid with an acrid, fruity odor. 

Measurement Methods 

(see Table 1): 

NIOSH 2537 

OSHA 94 

Chemical & Physical 

Properties: 

MW: 100.1 

BP: 214°F 

Sol: 1.5% 

Fl.P(oc): 50°F 

IP: 9.70 eV 

Sp.Gr: 0.94 

VP: 29 mmHg 

FRZ: -54°F 

UEL: 8.2% 

LEL: 1.7% 

Class IB Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

1000 ppm: Sa:Cf£/CcrFOv/GmFOv/ 

 PaprOv£/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Nitrates, oxidizers, peroxides, strong alkalis, moisture [Note: May polymerize 

if subjected to heat, oxidizers, or ultraviolet light. Usually contains an inhibitor such as hydroquinone.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, nose, throat; derm 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush prompt 

Breath: Resp support 

Swallow: Medical attention immed 

214
Methyl parathion Formula: 

(CH3O)2P(S)OC6H4NO2

CAS#: 

298-00-0 

RTECS#: 

TG0175000 

IDLH: 

N.D. 

Conversion: DOT: 2783 152 (solid); 3018 152 (liquid) 

Synonyms/Trade Names: Azophos®; O,O-Dimethyl-O-p-nitrophenylphosphorothioate; Parathion methyl 

Exposure Limits: 

NIOSH REL: TWA 0.2 mg/m3 [skin] 

OSHA PEL†: none 

Physical Description: White to tan, crystalline solid or powder with a pungent, garliclike odor. [pesticide] [Note: The commercial product in xylene is a tan liquid.] 

Measurement Methods 

(see Table 1): 

NIOSH 5600 

OSHA PV2112 

Chemical & Physical Properties: 

MW: 263.2 

BP: 289°F 

Sol(77°F): 0.006% 

Fl.P: ? 

IP: ? 

Sp.Gr: 1.36 

VP: 0.00001 mmHg 

MLT: 99°F 

UEL: ? 

LEL: ? 

Combustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam/Daily 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

2 mg/m3

: CcrOv95/Sa 

5 mg/m3

: Sa:Cf/PaprOvHie 

10 mg/m3

: CcrFOv100/GmFOv100/ 

 PaprTOvHie/SaT:Cf/ 

 ScbaF/SaF 

200 mg/m3

: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, water [Note: Explosive risk when heated above 122°F.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin; nau, vomit, abdom cramps, diarr, salv; head, dizz, 

lass; rhin, chest tight; blurred vision, miosis; card irreg; musc fasc; dysp

TO: Eyes, skin, resp sys, CNS, CVS, blood chol 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

M 

Methyl silicate Formula: 

(CH3O)4Si 

CAS#: 

681-84-5 

RTECS#: 

VV9800000 

IDLH: 

N.D. 

Conversion: 1 ppm = 6.23 mg/m3 DOT: 2606 155 

Synonyms/Trade Names: Methyl orthosilicate, Tetramethoxysilane, Tetramethyl ester of silicic acid, 

Tetramethyl silicate 

Exposure Limits: 

NIOSH REL: TWA 1 ppm (6 mg/m3

) 

OSHA PEL†: none 

Physical Description: Clear, colorless liquid. [Note: A solid below 28°F.] 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical Properties: 

MW: 152.3 

BP: 250°F 

Sol: Soluble 

Fl.P: 205°F 

IP: ? 

Sp.Gr: 1.02 

VP(77°F): 12 mmHg 

FRZ: 28°F 

UEL: ? 

LEL: ? 

Class IIIB Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: Daily 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Oxidizers; hexafluorides of rhenium, molybdenum & tungsten 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, corn damage (following even short-term exposure 

to the vapor); lung, kidney inj; pulm edema 

TO: Eyes, resp sys, kidneys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash 

Breath: Resp support 

Swallow: Medical attention immed 

215
M 

α-Methyl styrene Formula: 

C6H5C(CH3)=CH2

CAS#: 

98-83-9 

RTECS#: 

WL5075300 

IDLH: 

700 ppm 

Conversion: 1 ppm = 4.83 mg/m3 DOT: 

Synonyms/Trade Names: AMS, Isopropenyl benzene, 1-Methyl-1-phenylethylene, 2-Phenyl propylene 

Exposure Limits: 

NIOSH REL: TWA 50 ppm (240 mg/m3) 

 ST 100 ppm (485 mg/m3) 

OSHA PEL†: C 100 ppm (480 mg/m3

) 

Physical Description: Colorless liquid with a characteristic odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1501 

OSHA 7 

Chemical & Physical 

Properties: 

MW: 118.2 

BP: 330°F 

Sol: Insoluble 

Fl.P: 129°F 

IP: 8.35 eV 

Sp.Gr: 0.91 

VP: 2 mmHg 

FRZ: -10°F 

UEL: 6.1% 

LEL: 1.9% 

Class II Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

500 ppm: CcrOv*/Sa* 

700 ppm: Sa:Cf*/CcrFOv/GmFOv/ 

 PaprOv*/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Oxidizers, peroxides, halogens, catalysts for vinyl or ionic polymers; 

aluminum, iron chloride, copper [Note: Usually contains an inhibitor such as tert-butyl catechol.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, nose, throat; drow; derm 

TO: Eyes, skin, resp sys, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush prompt 

Breath: Resp support 

Swallow: Medical attention immed 

Metribuzin Formula: 

C8H14N4OS 

CAS#: 

21087-64-9 

RTECS#: 

XZ2990000 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: 4-Amino-6-(1,1-dimethylethyl)-3-(methylthio)-1,2,4-triazin-5(4H)-one 

Exposure Limits: 

NIOSH REL: TWA 5 mg/m3

OSHA PEL†: none 

Physical Description: Colorless, crystalline solid. [herbicide] 

Measurement Methods 

(see Table 1): 

OSHA PV2044 

Chemical & Physical Properties: 

MW: 214.3 

BP: ? 

Sol: 0.1% 

Fl.P: NA 

IP: ? 

Sp.Gr: 1.31 

VP: 0.0000004 mmHg 

MLT: 257°F 

UEL: NA 

LEL: NA 

Noncombustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam/Daily 

Remove: When wet or contam 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: None reported 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: In animals: CNS depres; thyroid, liver enzyme changes 

TO: CNS, thyroid, liver 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash 

Breath: Fresh air 

Swallow: Medical attention immed 

216
Mica (containing less than 1% quartz) Formula: CAS#: 

12001-26-2 

RTECS#: 

VV8760000 

IDLH: 

1500 mg/m3

Conversion: DOT: 

Synonyms/Trade Names: Biotite, Lepidolite, Margarite, Muscovite, Phlogopite, Roscoelite, Zimmwaldite 

Exposure Limits: 

NIOSH REL: TWA 3 mg/m3 (resp) 

OSHA PEL†: TWA 20 mppcf 

Physical Description: Colorless, odorless flakes or sheets of hydrous silicates. 

Measurement Methods 

(see Table 1): 

NIOSH 0600 

Chemical & Physical 

Properties: 

MW: 797 (approx) 

BP: ? 

Sol: Insoluble 

Fl.P: NA 

IP: NA 

Sp.Gr: 2.6-3.2 

VP: 0 mmHg (approx) 

MLT: ? 

UEL: NA 

LEL: NA 

Noncombustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

15 mg/m3

: Qm 

30 mg/m3: 95XQ/Sa 

75 mg/m3

: Sa:Cf/PaprHie 

150 mg/m3

: 100F/SaT:Cf/PaprTHie/ 

 ScbaF/SaF 

1500 mg/m3

: Sa:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Incompatibilities and Reactivities: None reported 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con 

SY: Irrit eyes; pneumoconiosis, cough, dysp; lass; low-wgt 

TO: Resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Breath: Fresh air M 

Mineral wool fiber Formula: CAS#: RTECS#: 

PY8070000 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: Manmade mineral fibers, Rock wool, Slag wool, Synthetic vitreous fibers 

[Note: Produced by blowing steam or air through molten rock (rock wool) or various furnace slags that are 

by-products of metal smelting or refining processes (slag wool).] 

Exposure Limits: 

NIOSH REL: TWA 3 fibers/cm3

 (fibers ≤ 3.5 μm diameter & ≥ 10 μm in length) 

 TWA 5 mg/m3

 (total) 

OSHA PEL: TWA 15 mg/m3

 (total) 

 TWA 5 mg/m3

 (resp) 

Measurement Methods 

(see Table 1): 

NIOSH 0500, 7400 

Physical Description: Typically, a mineral “wool” with diameters >0.5 μm & >1.5 μm in length. 

Chemical & Physical 

Properties: 

MW: varies 

BP: NA 

Sol: Insoluble 

Fl.P: NA 

IP: NA 

Sp.Gr: ? 

VP: 0 mmHg (approx) 

MLT: ? 

UEL: NA 

LEL: NA 

Noncombustible Fibers 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: Daily 

Remove: N.R. 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

5X REL: Qm 

10X REL: 95XQ/Sa 

25X REL: Sa:Cf/PaprHie 

50X REL: 100F/PaprTHie/ScbaF/SaF 

1000X REL: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Incompatibilities and Reactivities: None reported 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con 

SY: Irrit eyes, skin, resp sys; dysp 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Breath: Fresh air 

217
218

M 

Molybdenum Formula: 

Mo 

CAS#: 

7439-98-7 

RTECS#: 

QA4680000 

IDLH: 

5000 mg/m3

 (as Mo) 

Conversion: DOT: 

Synonyms/Trade Names: Molybdenum metal 

Exposure Limits: 

NIOSH REL*: See Appendix D 

OSHA PEL*†: TWA 15 mg/m3

 

[*Note: The REL and PEL also apply to other insoluble molybdenum 

compounds (as Mo).] 

Physical Description: Dark gray or black powder with a metallic luster. 

Measurement Methods 

(see Table 1): 

NIOSH 7300, 7301, 7303, 9102 

OSHA ID121, ID125G 

Chemical & Physical Properties: 

MW: 95.9 

BP: 8717°F 

Sol: Insoluble 

Fl.P: NA 

IP: NA 

Sp.Gr: 10.28 

VP: 0 mmHg (approx) 

MLT: 4752°F 

UEL: NA 

LEL: NA 

Combustible Solid in form of 

dust or powder. 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

OSHA 

75 mg/m3

: Qm 

150 mg/m3

: 95XQ/Sa 

375 mg/m3

: Sa:Cf/PaprHie 

750 mg/m3

: 100F/SaT:Cf/PaprTHie/ 

 ScbaF/SaF 

5000 mg/m3

: Sa:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: In animals: irrit eyes, nose, throat; anor, diarr, low-wgt; 

listlessness; liver, kidney damage 

TO: Eyes, resp sys, liver, kidneys 

First Aid (see Table 6): 

Eye: Irr immed 

Breath: Resp support 

Swallow: Medical attention immed 

Molybdenum (soluble compounds, as Mo) Formula: CAS#: RTECS#: IDLH: 

1000 mg/m3

 (as Mo) 

Conversion: DOT: 

Synonyms/Trade Names: Synonyms vary depending upon the specific soluble molybdenum compound. 

Exposure Limits: 

NIOSH REL: See Appendix D 

OSHA PEL: TWA 5 mg/m3

Physical Description: Appearance and odor vary depending upon the specific 

soluble molybdenum compound. 

Measurement Methods 

(see Table 1): 

NIOSH 7300, 7301, 7303, 9102 

OSHA ID121, ID125G 

Chemical & Physical 

Properties: 

Properties vary depending upon 

the specific soluble molybdenum 

compound. 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

OSHA 

25 mg/m3

: Qm* 

50 mg/m3

: 95XQ*/Sa* 

125 mg/m3

: Sa:Cf*/PaprHie* 

250 mg/m3

: 100F/SaT:Cf*/PaprTHie*/ 

 ScbaF/SaF 

1000 mg/m3

: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Incompatibilities and Reactivities: Varies 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: In animals: irrit eyes, nose, throat; anor; inco; dysp; anemia 

TO: Eyes, resp sys, kidneys, blood 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush 

Breath: Resp support 

Swallow: Medical attention immed 
219

M 

Monocrotophos Formula: 

C7H14NO5P 

CAS#: 

6923-22-4 

RTECS#: 

TC4375000 

IDLH: 

N.D. 

Conversion: DOT: 2783 152 (organophosphorus pesticide, solid) 

Synonyms/Trade Names: Azodrin®, 3-Hydroxy-N-methylcrotonamide dimethylphosphate, Monocron 

Exposure Limits: 

NIOSH REL: TWA 0.25 mg/m3

OSHA PEL†: none 

Physical Description: Colorless to reddish-brown solid with a mild, ester odor. 

[insecticide] 

Measurement Methods 

(see Table 1): 

NIOSH 5600 

OSHA PV2045 

Chemical & Physical Properties: 

MW: 223.2 

BP: 257°F 

Sol: Miscible 

Fl.P: >200°F 

IP: ? 

Sp.Gr: ? 

VP: 0.000007 mmHg 

MLT: 129°F 

UEL: ? 

LEL: ? 

Combustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Metals, low molecular weight alcohols & glycols 

[Note: Corrosive to black iron, drum steel, stainless steel 304 & brass. Should be stored at 70-80°F.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, miosis, blurred vision; dizz, convuls; dysp; salv, 

abdom cramps, nau, diarr, vomit; in animals: possible terato effects 

TO: Eyes, resp sys, CNS, CVS, blood chol, repro sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

Monomethyl aniline Formula: 

C6H5NHCH3

CAS#: 

100-61-8 

RTECS#: 

BY4550000 

IDLH: 

100 ppm 

Conversion: 1 ppm = 4.38 mg/m3 DOT: 2294 153 

Synonyms/Trade Names: MA, (Methylamino)benzene, N-Methyl aniline, Methylphenylamine, 

N-Phenylmethylamine 

Exposure Limits: 

NIOSH REL: TWA 0.5 ppm (2 mg/m3

) [skin] 

OSHA PEL†: TWA 2 ppm (9 mg/m3

) [skin] 

Physical Description: Yellow to light-brown liquid with a weak, ammonia-like odor. 

Measurement Methods 

(see Table 1): 

NIOSH 3511 

Chemical & Physical 

Properties: 

MW: 107.2 

BP: 384°F 

Sol: Insoluble 

Fl.P: 175°F 

IP: 7.32 eV 

Sp.Gr: 0.99 

VP: 0.3 mmHg 

FRZ: -71°F 

UEL: ? 

LEL: ? 

Class IIIA Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

5 ppm: Sa 

12.5 ppm: Sa:Cf 

25 ppm: SaT:Cf/ScbaF/SaF 

100 ppm: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFS/ScbaE 

Incompatibilities and Reactivities: Strong acids, strong oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Lass, dizz, head; dysp, cyan; methemo; pulm edema; liver, 

kidney damage 

TO: Resp sys, liver, kidneys, blood, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 
220

N 

Morpholine Formula: 

C4H9ON 

CAS#: 

110-91-8 

RTECS#: 

QD6475000 

IDLH: 

1400 ppm [10%LEL]

Conversion: 1 ppm = 3.56 mg/m3 DOT: 2054 132 

Synonyms/Trade Names: Diethylene imidoxide; Diethylene oximide; Tetrahydro-1,4-oxazine; 

Tetrahydro-p-oxazine 

Exposure Limits: 

NIOSH REL: TWA 20 ppm (70 mg/m3

) [skin] 

 ST 30 ppm (105 mg/m3

) 

OSHA PEL†: TWA 20 ppm (70 mg/m3

) [skin] 

Physical Description: Colorless liquid with a weak, ammonia- or fish-like odor. 

[Note: A solid below 23°F.] 

Measurement Methods 

(see Table 1): 

NIOSH S150 (II-3) 

Chemical & Physical 

Properties: 

MW: 87.1 

BP: 264°F 

Sol: Miscible 

Fl.P(oc): 98°F 

IP: 8.88 eV 

Sp.Gr: 1.007 

VP: 6 mmHg 

FRZ: 23°F 

UEL: 11.2% 

LEL: 1.4% 

Class IC Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Provide: Eyewash (>15%) 

 Quick drench (>25%) 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

500 ppm: Sa:Cf£/PaprOv£ 

1000 ppm: CcrFOv/GmFOv/PaprTOv£/ 

 ScbaF/SaF 

1400 ppm: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong acids, strong oxidizers, metals, nitro compounds 

[Note: Corrosive to metals.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, nose, resp sys; vis dist; cough; in animals: 

liver, kidney damage 

TO: Eyes, skin, resp sys, liver, kidneys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

Naphtha (coal tar) Formula: CAS#: 

8030-30-6 

RTECS#: 

DE3030000 

IDLH: 

1000 ppm [10%LEL]

Conversion: 1 ppm = 4.50 mg/m3 (approx) DOT: 

Synonyms/Trade Names: Crude solvent coal tar naphtha, High solvent naphtha, Naphtha 

Exposure Limits: 

NIOSH REL: TWA 100 ppm (400 mg/m3

) 

OSHA PEL: TWA 100 ppm (400 mg/m3

) 

Physical Description: Reddish-brown, mobile liquid with an aromatic odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1550 

Chemical & Physical 

Properties: 

MW: 110 (approx) 

BP: 320-428°F 

Sol: Insoluble 

Fl.P: 100-109°F 

IP: ? 

Sp.Gr: 0.89-0.97 

VP: <5 mmHg 

FRZ: ? 

UEL: ? 

LEL: ? 

Class II Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

1000 ppm: Sa:Cf£/CcrFOv/GmFOv/ 

 PaprOv£/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, nose; dizz, drow; derm; in animals: liver, 

kidney damage 

TO: Eyes, skin, resp sys, CNS, liver, kidneys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 
221

N 

Naphthalene Formula: 

C10H8

CAS#: 

91-20-3 

RTECS#: 

QJ0525000 

IDLH: 

250 ppm 

Conversion: 1 ppm = 5.24 mg/m3 DOT: 1334 133 (crude or refined); 2304 133 (molten) 

Synonyms/Trade Names: Naphthalin, Tar camphor, White tar 

Exposure Limits: 

NIOSH REL: TWA 10 ppm (50 mg/m3

) 

 ST 15 ppm (75 mg/m3

) 

OSHA PEL†: TWA 10 ppm (50 mg/m3

) 

Physical Description: Colorless to brown solid with an odor of mothballs. 

[Note: Shipped as a molten solid.] 

Measurement Methods 

(see Table 1): 

NIOSH 1501 

OSHA 35 

Chemical & Physical Properties: 

MW: 128.2 

BP: 424°F 

Sol: 0.003% 

Fl.P: 174°F 

IP: 8.12 eV 

Sp.Gr: 1.15 

VP: 0.08 mmHg 

MLT: 176°F 

UEL: 5.9% 

LEL: 0.9% 

Combustible Solid, but will take 

some effort to ignite. 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

100 ppm: CcrOv95*/Sa* 

250 ppm: Sa:Cf*/CcrFOv100/ 

 PaprOvHie*/ 

 ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, chromic anhydride 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes; head, conf, excitement, mal; nau, vomit, abdom 

pain; irrit bladder; profuse sweat; jaun; hema, renal shutdown; 

derm, optical neuritis, corn damage 

TO: Eyes, skin, blood, liver, kidneys, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Molten flush immed/sol-liq soap wash 

prompt 

Breath: Resp support 

Swallow: Medical attention immed 

Naphthalene diisocyanate Formula: 

C10H6(NCO)2

CAS#: 

3173-72-6 

RTECS#: 

NQ9600000 

IDLH: 

N.D. 

Conversion: 1 ppm = 8.60 mg/m3 DOT: 

Synonyms/Trade Names: 1,5-Diisocyanatonaphthalene; 1,5-Naphthalene diisocyanate; 

1,5-Naphthalene ester of isocyanic acid; NDI 

Exposure Limits: 

NIOSH REL: TWA 0.040 mg/m3

 (0.005 ppm) 

 C 0.170 mg/m3

 (0.020 ppm) [10-minute] 

OSHA PEL: none 

Physical Description: White to light-yellow, crystalline flakes. 

Measurement Methods 

(see Table 1): 

NIOSH 5525 

OSHA PV2046 

Chemical & Physical 

Properties: 

MW: 210.2 

BP: 505°F 

Sol: ? 

Fl.P(oc): 311°F 

IP: ? 

Sp.Gr: ? 

VP(75°F): 0.003 mmHg 

MLT: 261°F 

UEL: ? 

LEL: ? 

Combustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

0.05 ppm: Sa* 

0.125 ppm: Sa:Cf* 

0.25 ppm: ScbaF/SaF 

1 ppm: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: None reported 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, nose, throat; resp sens, cough, pulm secretions, 

chest pain, dysp; asthma 

TO: Eyes, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 
222

N 

α-Naphthylamine Formula: 

C10H7NH2

CAS#: 

134-32-7 

RTECS#: 

QM1400000 

IDLH: 

Ca [N.D.] 

Conversion: DOT: 2077 153 

Synonyms/Trade Names: 1-Aminonaphthalene, 1-Naphthylamine 

Exposure Limits: 

NIOSH REL: Ca 

 See Appendix A 

OSHA PEL: [1910.1004] See Appendix B 

Physical Description: Colorless crystals with an ammonia-like odor. 

[Note: Darkens in air to a reddish-purple color.] 

Measurement Methods 

(see Table 1): 

NIOSH 5518 

OSHA 93 

Chemical & Physical 

Properties: 

MW: 143.2 

BP: 573°F 

Sol: 0.002% 

Fl.P: 315°F 

IP: 7.30 eV 

Sp.Gr: 1.12 

VP(220°F): 1 mmHg 

MLT: 122°F 

UEL: ? 

LEL: ? 

Combustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam/Daily 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

See Appendix E (page 351) 

Incompatibilities and Reactivities: Oxidizes in air 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Derm; hemorrhagic cystitis; dysp, ataxia, methemo; hema; 

dysuria; [carc] 

TO: Bladder, skin [bladder cancer] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

β-Naphthylamine Formula: 

C10H7NH2

CAS#: 

91-59-8 

RTECS#: 

QM2100000 

IDLH: 

Ca [N.D.] 

Conversion: DOT: 1650 153 

Synonyms/Trade Names: 2-Aminonaphthalene, 2-Naphthylamine 

Exposure Limits: 

NIOSH REL: Ca 

 See Appendix A 

OSHA PEL: [1910.1009] See Appendix B 

Physical Description: Odorless, white to red crystals with a faint, aromatic odor. 

[Note: Darkens in air to a reddish-purple color.] 

Measurement Methods 

(see Table 1): 

NIOSH 5518 

OSHA 93 

Chemical & Physical 

Properties: 

MW: 143.2 

BP: 583°F 

Sol: Miscible in hot water 

Fl.P: 315°F 

IP: 9.71 eV 

Sp.Gr(208°F): 1.06 

VP(226°F): 1 mmHg 

MLT: 232°F 

UEL: ? 

LEL: ? 

Combustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam/Daily 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

See Appendix E (page 351) 

Incompatibilities and Reactivities: None reported 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Derm; hemorrhagic cystitis; dysp; ataxia; methemo, hema; 

dysuria; [carc] 

TO: Bladder, skin [bladder cancer] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 
223

N 

Niax® Catalyst ESN Formula: CAS#: 

62765-93-9 

RTECS#: 

QR3900000 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: None 

[Note: A mixture of 95% dimethylaminopropionitrile & 5% bis(2-dimethylamino)ethyl ether.] 

Exposure Limits: 

NIOSH REL: See Appendix C 

OSHA PEL: See Appendix C 

Measurement Methods 

(see Table 1): 

None available 

Physical Description: A liquid mixture. 

[Note: Used in the past as a catalyst in the manufacture of flexible polyurethane foams.] 

Chemical & Physical 

Properties: 

MW: mixture 

BP: ? 

Sol: ? 

Fl.P: ? 

IP: ? 

Sp.Gr: ? 

VP: ? 

FRZ: ? 

UEL: ? 

LEL: ? 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin; urinary dist; neurological disorders; pins & 

needles in hands & feet; musc weak, lass, nau, vomit; decr nerve 

conduction in lower legs 

TO: Eyes, skin, urinary tract, PNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

Nickel carbonyl Formula: 

Ni(CO)4

CAS#: 

13463-39-3 

RTECS#: 

QR6300000 

IDLH: 

Ca [2 ppm] 

Conversion: 1 ppm = 6.98 mg/m3 DOT: 1259 131 

Synonyms/Trade Names: Nickel tetracarbonyl, Tetracarbonyl nickel 

Exposure Limits: 

NIOSH REL: Ca 

 TWA 0.001 ppm (0.007 mg/m3

) 

 See Appendix A 

OSHA PEL: TWA 0.001 ppm (0.007 mg/m3

) 

Measurement Methods 

(see Table 1): 

NIOSH 6007 

Physical Description: Colorless to yellow liquid with a musty odor. [Note: A gas above 110°F.] 

Chemical & Physical 

Properties: 

MW: 170.7 

BP: 110°F 

Sol: 0.05% 

Fl.P: <-4°F 

IP: 8.28 eV 

Sp.Gr(63°F): 1.32 

VP: 315 mmHg 

FRZ: -13°F 

UEL: ? 

LEL: 2% 

Class IB Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFS/ScbaE 

Incompatibilities and Reactivities: Nitric acid, bromine, chlorine & other oxidizers; flammable materials 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Abs, Con 

SY: Head, dizz; nau, vomit, epigastric pain; substernal pain; cough, 

hyperpnea; cyan; lass; leucyt, pneu; delirium, convuls; [carc]; in animals: 

repro, terato effects 

TO: Lungs, paranasal sinus, CNS, repro sys [lung & nasal cancer] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 
224

N 

Nickel metal and other 

compounds (as Ni) 

Formula: 

Ni (metal) 

CAS#: 

7440-02-0 (metal) 

RTECS#: 

QR5950000 (metal) 

IDLH: Ca 

[10 mg/m3

 (as Ni)]

Conversion: DOT: 

Synonyms/Trade Names: Nickel metal: Elemental nickel, Nickel catalyst 

Synonyms of other nickel compounds vary depending upon the specific compound. 

Exposure Limits: 

NIOSH REL*: Ca 

 TWA 0.015 mg/m3

 

 See Appendix A 

OSHA PEL*†: TWA 1 mg/m3

 

[*Note: The REL and PEL do not apply to Nickel carbonyl.] 

Physical Description: Metal: Lustrous, silvery, odorless solid. 

Measurement Methods 

(see Table 1): 

NIOSH 7300, 7301, 7303, 9102 

OSHA ID121, ID125G 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: N.R. 

Wash skin: When contam/Daily 

Remove: When wet or contam 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Chemical & Physical Properties: 

MW: 58.7 

BP: 5139°F 

Sol: Insoluble 

Fl.P: NA 

IP: NA 

Sp.Gr: 8.90 (Metal) 

VP: 0 mmHg (approx) 

MLT: 2831°F 

UEL: NA 

LEL: NA 

Metal: Combustible Solid; nickel 

sponge catalyst may ignite 

SPONTANEOUSLY in air. 

Incompatibilities and Reactivities: Strong acids, sulfur, selenium, 

wood & other combustibles, nickel nitrate 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Sens derm, allergic asthma, pneu; [carc] 

TO: Nasal cavities, lungs, skin [lung and nasal cancer] 

First Aid (see Table 6): 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

Nicotine Formula: 

C5H4NC4H7NCH3

CAS#: 

54-11-5 

RTECS#: 

QS5250000 

IDLH: 

5 mg/m3

Conversion: DOT: 1654 151 

Synonyms/Trade Names: 3-(1-Methyl-2-pyrrolidyl)pyridine 

Exposure Limits: 

NIOSH REL: TWA 0.5 mg/m3

 [skin] 

OSHA PEL: TWA 0.5 mg/m3

 [skin] 

Physical Description: Pale-yellow to dark-brown liquid with a fish-like odor when 

warm. [insecticide] 

Measurement Methods 

(see Table 1): 

NIOSH 2544, 2551 

Chemical & Physical Properties: 

MW: 162.2 

BP: 482°F (Decomposes) 

Sol: Miscible 

Fl.P: 203°F 

IP: 8.01 eV 

Sp.Gr: 1.01 

VP: 0.08 mmHg 

FRZ: -110°F 

UEL: 4.0% 

LEL: 0.7% 

Class IIIB Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

5 mg/m3

: Sa/ScbaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, strong acids 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Nau, salv, abdom pain, vomit, diarr; head, dizz, hearing, vis dist; conf, 

lass, inco; card arrhy; convuls, dysp; in animals: terato effects 

TO: CNS, CVS, lungs, GI tract, repro sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 
225

N 

Nitric acid Formula: 

HNO3

CAS#: 

7697-37-2 

RTECS#: 

QU5775000 

IDLH: 

25 ppm 

Conversion: 1 ppm = 2.58 mg/m3 DOT: 2032 157 (fuming); 2031 157 (other than red fuming) 

Synonyms/Trade Names: Aqua fortis, Engravers acid, Hydrogen nitrate, Red fuming nitric acid (RFNA), 

White fuming nitric acid (WFNA) 

Exposure Limits: 

NIOSH REL: TWA 2 ppm (5 mg/m3

) 

 ST 4 ppm (10 mg/m3

) 

OSHA PEL†: TWA 2 ppm (5 mg/m3

) 

Measurement Methods 

(see Table 1): 

NIOSH 7903 

OSHA ID165SG 

Physical Description: Colorless, yellow, or red, fuming liquid with an acrid, suffocating odor. 

[Note: Often used in an aqueous solution. Fuming nitric acid is concentrated nitric acid that contains dissolved 

nitrogen dioxide.] 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash (pH<2.5) 

 Quick drench (pH<2.5) 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

25 ppm: Sa:Cf*/CcrFS¿/GmFS¿/ 

 ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFS¿/ScbaE 

Chemical & Physical Properties: 

MW: 63.0 

BP: 181°F 

Sol: Miscible 

Fl.P: NA 

IP: 11.95 eV 

Sp.Gr(77°F): 1.50 

VP: 48 mmHg 

FRZ: -44°F 

UEL: NA 

LEL: NA 

Noncombustible Liquid, but 

increases the flammability of 

combustible materials. 

Incompatibilities and Reactivities: Combustible materials, metallic 

powders, hydrogen sulfide, carbides, alcohols 

[Note: Reacts with water to produce heat. Corrosive to metals.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, muc memb; delayed pulm edema, pneu, 

bron; dental erosion 

TO: Eyes, skin, resp sys, teeth 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

Nitric oxide Formula: 

NO 

CAS#: 

10102-43-9 

RTECS#: 

QX0525000 

IDLH: 

100 ppm 

Conversion: 1 ppm = 1.23 mg/m3 DOT: 1660 124 

Synonyms/Trade Names: Mononitrogen monoxide, Nitrogen monoxide 

Exposure Limits: 

NIOSH REL: TWA 25 ppm (30 mg/m3

) 

OSHA PEL: TWA 25 ppm (30 mg/m3

) 

Physical Description: Colorless gas. 

[Note: Shipped as a nonliquefied compressed gas.] 

Measurement Methods 

(see Table 1): 

NIOSH 6014 

OSHA ID190 

Chemical & Physical Properties: 

MW: 30.0 

BP: -241°F 

Sol: 5% 

Fl.P: NA 

IP: 9.27 eV 

RGasD: 1.04 

VP: 34.2 atm 

FRZ: -263°F 

UEL: NA 

LEL: NA 

Nonflammable Gas, but will accelerate 

the burning of combustible materials. 

Personal Protection/Sanitation

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

100 ppm: Sa:Cf*/CcrFS¿/PaprS*¿/ 

 GmFS¿/Sa*/ScbaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFS¿/ScbaE 

Incompatibilities and Reactivities: Fluorine, combustible materials, ozone, NH3, chlorinated hydrocarbons, 

metals, carbon disulfide [Note: Reacts with water to form nitric acid. Rapidly converted in air to nitrogen dioxide.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh 

SY: Irrit eyes, wet skin, nose, throat; drow, uncon; methemo 

TO: Eyes, skin, resp sys, blood, CNS 

First Aid (see Table 6): 

Breath: Resp support 
226

N 

p-Nitroaniline Formula: 

NO2C6H4NH2

CAS#: 

100-01-6 

RTECS#: 

BY7000000 

IDLH: 

300 mg/m3

Conversion: DOT: 1661 153 

Synonyms/Trade Names: para-Aminonitrobenzene, 4-Nitroaniline, 4-Nitrobenzenamine, p-Nitrophenylamine, PNA 

Exposure Limits: 

NIOSH REL: TWA 3 mg/m3

 [skin] 

OSHA PEL†: TWA 6 mg/m3

 (1 ppm) [skin] 

Physical Description: Bright yellow, crystalline powder with a slight ammonia-like 

odor. 

Measurement Methods 

(see Table 1): 

NIOSH 5033 

Chemical & Physical 

Properties: 

MW: 138.1 

BP: 630°F 

Sol: 0.08% 

Fl.P: 390°F 

IP: 8.85 eV 

Sp.Gr: 1.42 

VP: 0.00002 mmHg 

MLT: 295°F 

UEL: ? 

LEL: ? 

Combustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam/Daily 

Remove: When wet or contam 

Change: Daily 

Provide: Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

30 mg/m3

: Sa* 

75 mg/m3

: Sa:Cf* 

150 mg/m3

: ScbaF/SaF 

300 mg/m3

: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, strong reducers 

[Note: May result in spontaneous heating of organic materials in the presence of moisture.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit nose, throat; cyan, ataxia; tacar, tachypnea; dysp; irrity; 

vomit, diarr; convuls; resp arrest; anemia; methemo; jaundice 

TO: Resp sys, blood, heart, liver 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

Nitrobenzene Formula: 

C6H5NO2

CAS#: 

98-95-3 

RTECS#: 

DA6475000 

IDLH: 

200 ppm 

Conversion: 1 ppm = 5.04 mg/m3 DOT: 1662 152 

Synonyms/Trade Names: Essence of mirbane, Nitrobenzol, Oil of mirbane 

Exposure Limits: 

NIOSH REL: TWA 1 ppm (5 mg/m3

) [skin] 

OSHA PEL: TWA 1 ppm (5 mg/m3

) [skin] 

Physical Description: Yellow, oily liquid with a pungent odor like paste shoe polish. 

[Note: A solid below 42°F.] 

Measurement Methods 

(see Table 1): 

NIOSH 2005, 2017 

Chemical & Physical 

Properties: 

MW: 123.1 

BP: 411°F 

Sol: 0.2% 

Fl.P: 190°F 

IP: 9.92 eV 

Sp.Gr: 1.20 

VP(77°F): 0.3 mmHg 

FRZ: 42°F 

UEL: ? 

LEL(200°F): 1.8% 

Class IIIA Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: N.R. 

Remove: When wet or contam 

Change: Daily 

Provide: Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

10 ppm: CcrOv*/Sa* 

25 ppm: Sa:Cf*/PaprOv* 

50 ppm: CcrFOv/GmFOv/PaprTOv*/ 

 ScbaF/SaF 

200 ppm: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Concentrated nitric acid, nitrogen tetroxide, caustics, 

phosphorus pentachloride, chemically-active metals such as tin or zinc 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin; anoxia; derm; anemia; methemo; in animals: 

liver, kidney damage; testicular effects 

TO: Eyes, skin, blood, liver, kidneys, CVS, repro sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 
227

N 

4-Nitrobiphenyl Formula: 

C6H5C6H4NO2

CAS#: 

92-93-3 

RTECS#: 

DV5600000 

IDLH: 

Ca [N.D.] 

Conversion: DOT: 

Synonyms/Trade Names: p-Nitrobiphenyl, p-Nitrodiphenyl, 4-Nitrodiphenyl, p-Phenylnitrobenzene, 

4-Phenylnitrobenzene, PNB 

Exposure Limits: 

NIOSH REL: Ca 

 See Appendix A 

OSHA PEL: [1910.1003] See Appendix B 

Measurement Methods 

(see Table 1): 

NIOSH P&CAM273 (II-4) 

OSHA PV2082 

Physical Description: White to yellow, needle-like, crystalline solid with a sweetish odor. 

Chemical & Physical Properties: 

MW: 199.2 

BP: 644°F 

Sol: Insoluble 

Fl.P: 290°F 

IP: ? 

Sp.Gr: ? 

VP: ? 

MLT: 237°F 

UEL: ? 

LEL: ? 

Combustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam/Daily 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

See Appendix E (page 351) 

Incompatibilities and Reactivities: Strong reducers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Head, drow, dizz; dysp; ataxia, lass; methemo; urinary 

burning; acute hemorrhagic cystitis; [carc] 

TO: Bladder, blood [in animals: bladder tumors] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

p-Nitrochlorobenzene Formula: 

ClC6H4NO2

CAS#: 

100-00-5 

RTECS#: 

CZ1050000 

IDLH: 

Ca [100 mg/m3

] 

Conversion: DOT: 1578 152 

Synonyms/Trade Names: p-Chloronitrobenzene, 4-Chloronitrobenzene, 1-Chloro-4-nitrobenzene, 

4-Nitrochlorobenzene, PCNB, PNCB 

Exposure Limits: 

NIOSH REL: Ca 

 See Appendix A [skin] 

OSHA PEL: TWA 1 mg/m3

 [skin] 

Physical Description: Yellow, crystalline solid with a sweet odor. 

Measurement Methods 

(see Table 1): 

NIOSH 2005 

Chemical & Physical Properties: 

MW: 157.6 

BP: 468°F 

Sol: Slight 

Fl.P: 261°F 

IP: 9.96 eV 

Sp.Gr: 1.52 

VP(86°F): 0.2 mmHg 

MLT: 182°F 

UEL: ? 

LEL: ? 

Solid that does not burn, or burns 

with difficulty. 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam/Daily 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, alkalis 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Anoxia; unpleasant taste; anemia; methemo; in animals: hema; 

spleen, kidney, bone marrow changes; repro effects; [carc] 

TO: Blood, liver, kidneys, CVS, spleen, bone marrow, repro sys 

[in animals: vascular & liver tumors] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 
228

N 

Nitroethane Formula: 

CH3CH2NO2

CAS#: 

79-24-3 

RTECS#: 

KI5600000 

IDLH: 

1000 ppm 

Conversion: 1 ppm = 3.07 mg/m3 DOT: 2842 129 

Synonyms/Trade Names: Nitroetan 

Exposure Limits: 

NIOSH REL: TWA 100 ppm (310 mg/m3

) 

OSHA PEL: TWA 100 ppm (310 mg/m3

) 

Physical Description: Colorless, oily liquid with a mild, fruity odor. 

Measurement Methods 

(see Table 1): 

NIOSH 2526 

Chemical & Physical Properties: 

MW: 75.1 

BP: 237°F 

Sol: 5% 

Fl.P: 82°F 

IP: 10.88 eV 

Sp.Gr: 1.05 

VP(77°F): 21 mmHg 

FRZ: -130°F 

UEL: ? 

LEL: 3.4% 

Class IC Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

1000 ppm: ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: ScbaE 

Incompatibilities and Reactivities: Amines; strong acids, alkalis & oxidizers; hydrocarbons; combustibles; 

metal oxides 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Derm; in animals: lac; dysp, pulm rales, edema; liver, kidney inj; narco

TO: Skin, resp sys, CNS, kidneys, liver 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 

Nitrogen dioxide Formula: 

NO2

CAS#: 

10102-44-0 

RTECS#: 

QW9800000 

IDLH: 

20 ppm 

Conversion: 1 ppm = 1.88 mg/m3 DOT: 1067 124 

Synonyms/Trade Names: Dinitrogen tetroxide (N2O4), Nitrogen peroxide 

Exposure Limits: 

NIOSH REL: ST 1 ppm (1.8 mg/m3

) 

OSHA PEL†: C 5 ppm (9 mg/m3

) 

Physical Description: Yellowish-brown liquid or reddish-brown gas (above 70°F) with 

a pungent, acrid odor. [Note: In solid form (below 15°F) it is found structurally as N2O4.]

Measurement Methods 

(see Table 1): 

NIOSH 6014 

OSHA ID182 

Chemical & Physical Properties: 

MW: 46.0 

BP: 70°F 

Sol: Reacts 

Fl.P: NA 

IP: 9.75 eV 

RGasD: 2.62 

Sp.Gr: 1.44 (Liquid at 68°F) 

VP: 720 mmHg 

FRZ: 15°F 

UEL: NA 

LEL: NA 

Noncombustible Liquid/Gas, but 

will accelerate the burning of 

combustible materials. 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

20 ppm: Sa:Cf£/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFS¿/ScbaE 

Incompatibilities and Reactivities: Combustible material, water, chlorinated hydrocarbons, carbon disulfide, 

ammonia [Note: Reacts with water to form nitric acid.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, nose, throat; cough, mucoid frothy sputum, decr pulm func, 

chronic bron, dysp; chest pain; pulm edema, cyan, tachypnea, tacar 

TO: Eyes, resp sys, CVS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 
229

N 

Nitrogen trifluoride Formula: 

NF3

CAS#: 

7783-54-2 

RTECS#: 

QX1925000 

IDLH: 

1000 ppm 

Conversion: 1 ppm = 2.90 mg/m3 DOT: 2451 122 

Synonyms/Trade Names: Nitrogen fluoride, Trifluoramine, Trifluorammonia 

Exposure Limits: 

NIOSH REL: TWA 10 ppm (29 mg/m3

) 

OSHA PEL: TWA 10 ppm (29 mg/m3

) 

Physical Description: Colorless gas with a moldy odor. 

[Note: Shipped as a nonliquefied compressed gas.] 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical Properties: 

MW: 71.0 

BP: -200°F 

Sol: Slight 

Fl.P: NA 

IP: 12.97 eV 

RGasD: 2.46 

VP: >1 atm 

FRZ: -340°F 

UEL: NA 

LEL: NA 

Nonflammable Gas 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

100 ppm: CcrS/Sa 

250 ppm: Sa:Cf/PaprS 

500 ppm: CcrFS/GmFS/PaprTS*/ 

 SaT:Cf*/ScbaF/SaF 

1000 ppm: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFS/ScbaE 

Incompatibilities and Reactivities: Water, oil, grease, oxidizable materials, ammonia, carbon monoxide, 

methane, hydrogen, hydrogen sulfide, activated charcoal, diborane 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh 

SY: In animals: anoxia, cyan; methemo; lass, dizz, head; liver, kidney inj 

TO: Blood, liver, kidneys 

First Aid (see Table 6): 

Breath: Resp support 

Nitroglycerine Formula: 

CH2NO3CHNO3CH2NO3

CAS#: 

55-63-0 

RTECS#: 

QX2100000 

IDLH: 

75 mg/m3

Conversion: 1 ppm = 9.29 mg/m3 DOT: 1204 127 (≤ 1% solution in alcohol); 

3064 127 (1-5% solution in alcohol) 

Synonyms/Trade Names: Glyceryl trinitrate; NG; 1,2,3-Propanetriol trinitrate; Trinitroglycerine 

Exposure Limits: 

NIOSH REL: ST 0.1 mg/m3

 [skin] 

OSHA PEL†: C 0.2 ppm (2 mg/m3

) [skin] 

Physical Description: Colorless to pale-yellow, viscous liquid or solid (below 56°F). 

[Note: An explosive ingredient in dynamite (20-40%) with ethylene glycol 

dinitrate (80-60%).] 

Measurement Methods 

(see Table 1): 

NIOSH 2507 

OSHA 43 

Chemical & Physical Properties: 

MW: 227.1 

BP: Begins to decompose at 122-140°F

Sol: 0.1% 

Fl.P: Explodes 

IP: ? 

Sp.Gr: 1.60 

VP: 0.0003 mmHg 

FRZ: 56°F 

UEL: ? 

LEL: ? 

Explosive Liquid 

Personal Protection/Sanitation

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: Daily 

Provide: Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

1 mg/m3

: Sa* 

2.5 mg/m3

: Sa:Cf* 

5 mg/m3

: SaT:Cf*/ScbaF/SaF 

75 mg/m3

: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Incompatibilities and Reactivities: Heat, ozone, shock, acids [Note: An OSHA Class A Explosive (1910.109).] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Throb head; dizz; nau, vomit, abdom pain; hypotension; flush; 

palp; methemo; delirium, CNS depres; angina; skin irrit 

TO: CVS, blood, skin, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 
230

N 

Nitromethane Formula: 

CH3NO2

CAS#: 

75-52-5 

RTECS#: 

PA9800000 

IDLH: 

750 ppm 

Conversion: 1 ppm = 2.50 mg/m3 DOT: 1261 129 

Synonyms/Trade Names: Nitrocarbol 

Exposure Limits: 

NIOSH REL: See Appendix D 

OSHA PEL: TWA 100 ppm (250 mg/m3

) 

Physical Description: Colorless, oily liquid with a disagreeable odor. 

Measurement Methods 

(see Table 1): 

NIOSH 2527 

Chemical & Physical Properties: 

MW: 61.0 

BP: 214°F 

Sol: 10% 

Fl.P: 95°F 

IP: 11.08 eV 

Sp.Gr: 1.14 

VP: 28 mmHg 

FRZ: -20°F 

UEL: ? 

LEL: 7.3% 

Class IC Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

OSHA 

750 ppm: Sa:Cf£/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: ScbaE 

Incompatibilities and Reactivities: Amines; strong acids, alkalis & oxidizers; hydrocarbons & other combustible 

materials; metallic oxides [Note: Slowly corrodes steel & copper when wet.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Derm; in animals: irrit eyes, resp sys; convuls, narco; liver damage 

TO: Eyes, skin, CNS, liver 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 

2-Nitronaphthalene Formula: 

C10H7NO2

CAS#: 

581-89-5 

RTECS#: 

QJ9760000 

IDLH: 

Ca [N.D.] 

Conversion: DOT: 2538 133 

Synonyms/Trade Names: β-Nitronaphthalene 

Exposure Limits: 

NIOSH REL: Ca* 

 See Appendix A 

 [*Note: Since metabolized to β-Naphthylamine.] 

OSHA PEL: none 

Physical Description: Colorless solid. 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical 

Properties: 

MW: 178.2 

BP: ? 

Sol: Insoluble 

Fl.P: ? 

IP: 8.67 eV 

Sp.Gr: ? 

VP: ? 

MLT: 174°F 

UEL: ? 

LEL: ? 

Combustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam/Daily 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Incompatibilities and Reactivities: For “Nitrates” in general: Aluminum, cyanides, esters, phosphorus, 

tin chlorides, thiocyanates, sodium hypophosphite 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit skin, resp sys; derm; [carc] 

TO: Skin, resp sys [bladder cancer] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 
231

N 

1-Nitropropane Formula: 

CH3CH2CH2NO2

CAS#: 

108-03-2 

RTECS#: 

TZ5075000 

IDLH: 

1000 ppm 

Conversion: 1 ppm = 3.64 mg/m3 DOT: 2608 129 

Synonyms/Trade Names: Nitropropane, 1-NP 

Exposure Limits: 

NIOSH REL: TWA 25 ppm (90 mg/m3

) 

OSHA PEL: TWA 25 ppm (90 mg/m3

) 

Physical Description: Colorless liquid with a somewhat disagreeable odor. 

Measurement Methods 

(see Table 1): 

OSHA 46 

Chemical & Physical Properties: 

MW: 89.1 

BP: 269°F 

Sol: 1% 

Fl.P: 96°F 

IP: 10.81 eV 

Sp.Gr: 1.00 

VP: 8 mmHg 

FRZ: -162°F 

UEL: ? 

LEL: 2.2% 

Class IC Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: Prevent eye contact 

Wash skin: N.R. 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

250 ppm: Sa* 

625 ppm: Sa:Cf* 

1000 ppm: ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: ScbaE 

Incompatibilities and Reactivities: Amines; strong acids, alkalis & oxidizers; 

hydrocarbons & other combustible materials; metal oxides 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes; head, nau, vomit, diarr; in animals: liver, kidney damage 

TO: Eyes, CNS, liver, kidneys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 

2-Nitropropane Formula: 

(CH3)2CH(NO2) 

CAS#: 

79-46-9 

RTECS#: 

TZ5250000 

IDLH: 

Ca [100 ppm] 

Conversion: 1 ppm = 3.64 mg/m3 DOT: 2608 129 

Synonyms/Trade Names: Dimethylnitromethane, iso-Nitropropane, 2-NP 

Exposure Limits: 

NIOSH REL: Ca 

 See Appendix A 

OSHA PEL†: TWA 25 ppm (90 mg/m3

) 

Physical Description: Colorless liquid with a pleasant, fruity odor. 

Measurement Methods 

(see Table 1): 

NIOSH 2528 

OSHA 15, 46 

Chemical & Physical 

Properties: 

MW: 89.1 

BP: 249°F 

Sol: 2% 

Fl.P: 75°F 

IP: 10.71 eV 

Sp.Gr: 0.99 

VP: 13 mmHg 

FRZ: -135°F 

UEL: 11.0% 

LEL: 2.6% 

Class IC Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: ScbaE 

Incompatibilities and Reactivities: Amines; strong acids, alkalis & oxidizers; metal oxides; combustible materials 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, nose, resp sys; head, anor, nau, vomit, diarr; 

kidney, liver damage; [carc] 

TO: Eyes, skin, resp sys, CNS, kidneys, liver [in animals: liver tumors] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 
N 

N-Nitrosodimethylamine Formula: 

(CH3)2N2O 

CAS#: 

62-75-9 

RTECS#: 

IQ0525000 

IDLH: 

Ca [N.D.] 

Conversion: DOT: 

Synonyms/Trade Names: Dimethylnitrosamine; N,N-Dimethylnitrosamine; DMNA; 

N-Methyl-N-nitroso-methanamine; NDMA; N-Nitroso-N,N-dimethylamine 

Exposure Limits: 

NIOSH REL: Ca 

 See Appendix A 

OSHA PEL: [1910.1016] See Appendix B 

Physical Description: Yellow, oily liquid with a faint, characteristic odor. 

Measurement Methods 

(see Table 1): 

NIOSH 2522 

OSHA 38 

Chemical & Physical 

Properties: 

MW: 74.1 

BP: 306°F 

Sol: Soluble 

Fl.P: ? 

IP: 8.69 eV 

Sp.Gr: 1.005 

VP: 3 mmHg 

FRZ: ? 

UEL: ? 

LEL: ? 

Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam/Daily 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

See Appendix E (page 351) 

Incompatibilities and Reactivities: Strong oxidizers [Note: Should be stored in dark bottles.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Nau, vomit, diarr, abdom cramps; head; fever; enlarged liver, 

jaun; decr liver, kidney, pulm func; [carc] 

TO: Liver, kidneys,lungs [in animals; lung, kidney, liver & nasal 

cavity tumors] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

m-Nitrotoluene Formula: 

NO2C6H4CH3

CAS#: 

99-08-1 

RTECS#: 

XT2975000 

IDLH: 

200 ppm 

Conversion: 1 ppm = 5.61 mg/m3 DOT: 1664 152 

Synonyms/Trade Names: m-Methylnitrobenzene, 3-Methylnitrobenzene, meta-Nitrotoluene, 3-Nitrotoluene 

Exposure Limits: 

NIOSH REL: TWA 2 ppm (11 mg/m3

) [skin] 

OSHA PEL†: TWA 5 ppm (30 mg/m3

) [skin] 

Physical Description: Yellow liquid with a weak, aromatic odor. 

[Note: A solid below 59°F.] 

Measurement Methods 

(see Table 1): 

NIOSH 2005 

Chemical & Physical 

Properties: 

MW: 137.1 

BP: 450°F 

Sol: 0.05% 

Fl.P: 223°F 

IP: 9.48 eV 

Sp.Gr: 1.16 

VP: 0.1 mmHg 

FRZ: 59°F 

UEL: ? 

LEL: 1.6% 

Class IIIB Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

20 ppm: Sa* 

50 ppm: Sa:Cf* 

100 ppm: SaT:Cf*/ScbaF/SaF 

200 ppm: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, sulfuric acid 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Anoxia, cyan; head, lass, dizz; ataxia; dysp; tacar; nau, vomit 

TO: Blood, CNS, CVS, skin, GI tract 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

232
o-Nitrotoluene Formula: 

NO2C6H4CH3

CAS#: 

88-72-2 

RTECS#: 

XT3150000 

IDLH: 

200 ppm 

Conversion: 1 ppm = 5.61 mg/m3 DOT: 1664 152 

Synonyms/Trade Names: o-Methylnitrobenzene, 2-Methylnitrobenzene, ortho-Nitrotoluene, 2-Nitrotoluene 

Exposure Limits: 

NIOSH REL: TWA 2 ppm (11 mg/m3) [skin] 

OSHA PEL†: TWA 5 ppm (30 mg/m3

) [skin] 

Physical Description: Yellow liquid with a weak, aromatic odor. 

[Note: A solid below 25°F.] 

Measurement Methods 

(see Table 1): 

NIOSH 2005 

Chemical & Physical Properties: 

MW: 137.1 

BP: 432°F 

Sol: 0.07% 

Fl.P: 223°F 

IP: 9.43 eV 

Sp.Gr: 1.16 

VP: 0.1 mmHg 

FRZ: 25°F 

UEL: ? 

LEL: 2.2% 

Class IIIB Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

20 ppm: Sa* 

50 ppm: Sa:Cf* 

100 ppm: SaT:Cf*/ScbaF/SaF 

200 ppm: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, sulfuric acid 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Anoxia, cyan; head, lass, dizz; ataxia; dysp; tacar; nau, vomit 

TO: Blood, CNS, CVS, skin, GI tract 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed N 

p-Nitrotoluene Formula: 

NO2C6H4CH3

CAS#: 

99-99-0 

RTECS#: 

XT3325000 

IDLH: 

200 ppm 

Conversion: 1 ppm = 5.61 mg/m3 DOT: 1664 152 

Synonyms/Trade Names: p-Methylnitrobenzene, 4-Methylnitrobenzene, para-Nitrotoluene, 4-Nitrotoluene 

Exposure Limits: 

NIOSH REL: TWA 2 ppm (11 mg/m3

) [skin] 

OSHA PEL†: TWA 5 ppm (30 mg/m3

) [skin] 

Physical Description: Crystalline solid with a weak, aromatic odor. 

Measurement Methods 

(see Table 1): 

NIOSH 2005 

Chemical & Physical 

Properties: 

MW: 137.1 

BP: 460°F 

Sol: 0.04% 

Fl.P: 223°F 

IP: 9.50 eV 

Sp.Gr: 1.12 

VP: 0.1 mmHg 

MLT: 126°F 

UEL: ? 

LEL: 1.6% 

Combustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

20 ppm: Sa* 

50 ppm: Sa:Cf* 

100 ppm: SaT:Cf*/ScbaF/SaF 

200 ppm: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, sulfuric acid 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Anoxia, cyan; head, lass, dizz; ataxia; dysp; tacar; nau, 

vomit 

TO: Blood, CNS, CVS, skin, GI tract 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

233
N 

Nitrous oxide Formula: 

N2O 

CAS#: 

10024-97-2 

RTECS#: 

QX1350000 

IDLH: 

N.D. 

Conversion: 1 ppm = 1.80 mg/m3 DOT: 1070 122; 2201 122 (refrigerated liquid) 

Synonyms/Trade Names: Dinitrogen monoxide, Hyponitrous acid anhydride, Laughing gas 

Exposure Limits: 

NIOSH REL*: TWA 25 ppm (46 mg/m3) (TWA over the time exposed) 

 [*Note: REL for exposure to waste anesthetic gas.] 

OSHA PEL: none 

Physical Description: Colorless gas with a slightly sweet odor. [inhalation anesthetic] 

[Note: Shipped as a liquefied compressed gas.] 

Measurement Methods 

(see Table 1): 

NIOSH 3800, 6600 

OSHA ID166 

Chemical & Physical Properties: 

MW: 44.0 

BP: -127°F 

Sol(77°F): 0.1% 

Fl.P: NA 

IP: 12.89 eV 

RGasD: 1.53 

VP: 51.3 atm 

FRZ: -132°F 

UEL: NA 

LEL: NA 

Nonflammable Gas, but supports 

combustion at elevated temperatures. 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Frostbite 

Eyes: Frostbite 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Provide: Frostbite wash 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Aluminum, boron, hydrazine, lithium hydride, phosphine, sodium 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con (liquid) 

SY: Dysp; drow, head; asphy; repro effects; liquid: frostbite 

TO: Resp sys, CNS, repro sys 

First Aid (see Table 6): 

Eye: Frostbite 

Skin: Frostbite 

Breath: Fresh air 

Nonane Formula: 

CH3(CH2)7CH3

CAS#: 

111-84-2 

RTECS#: 

RA6115000 

IDLH: 

N.D. 

Conversion: 1 ppm = 5.25 mg/m3 DOT: 1920 128 

Synonyms/Trade Names: n-Nonane, Nonyl hydride 

Exposure Limits: 

NIOSH REL: TWA 200 ppm (1050 mg/m3

) 

OSHA PEL†: none 

Physical Description: Colorless liquid with a gasoline-like odor. 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical Properties: 

MW: 128.3 

BP: 303°F 

Sol: Insoluble 

Fl.P: 88°F 

IP: 10.21 eV 

Sp.Gr: 0.72 

VP: 3 mmHg 

FRZ: -60°F 

UEL: 2.9% 

LEL: 0.8% 

Class IC Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: Prevent eye contact 

Wash skin: Daily 

Remove: When wet (flamm) 

Change: N.R. 

Provide: Eyewash 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Strong oxidizers (e.g., peroxides, nitrates, perchlorates) 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, nose, throat; head, drow, dizz, conf, nau, 

tremor, inco; chemical pneu (aspir liquid) 

TO: Eyes, skin, resp sys, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

234
1-Nonanethiol Formula: 

CH3(CH2)8SH 

CAS#: 

1455-21-6 

RTECS#: IDLH: 

N.D. 

Conversion: 1 ppm = 6.56 mg/m3 DOT: 1228 131 

Synonyms/Trade Names: 1-Mercaptononane, n-Nonyl mercaptan, Nonylthiol 

Exposure Limits: 

NIOSH REL: C 0.5 ppm (3.3 mg/m3) [15-minute] 

OSHA PEL: none 

Physical Description: Liquid. 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical 

Properties: 

MW: 160.3 

BP: ? 

Sol: Insoluble 

Fl.P: ? 

IP: ? 

Sp.Gr: ? 

VP: ? 

FRZ: ? 

UEL: ? 

LEL: ? 

Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

5 ppm: CcrOv/Sa 

12.5 ppm: Sa:Cf/PaprOv 

25 ppm: CcrFOv/GmFOv/PaprTOv/ 

 ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Oxidizers, reducing agents, strong acids & bases, alkali metals 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, nose, throat; lass, cyan, incr respiration, nau, 

drow, head, vomit 

TO: Eyes, skin, resp sys, blood, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash 

Breath: Resp support 

Swallow: Medical attention immed 

O 

Octachloronaphthalene Formula: 

C10Cl8

CAS#: 

2234-13-1 

RTECS#: 

QK0250000 

IDLH: 

See Appendix F 

Conversion: DOT: 

Synonyms/Trade Names: Halowax® 1051; 1,2,3,4,5,6,7,8-Octachloronaphthalene; Perchloronaphthalene 

Exposure Limits: 

NIOSH REL: TWA 0.1 mg/m3

 

 ST 0.3 mg/m3

 [skin] 

OSHA PEL†: TWA 0.1 mg/m3

 [skin] 

Physical Description: Waxy, pale-yellow solid with an aromatic odor. 

Measurement Methods 

(see Table 1): 

NIOSH S97 (II-2) 

Chemical & Physical 

Properties: 

MW: 403.7 

BP: 770°F 

Sol: Insoluble 

Fl.P: NA 

IP: ? 

Sp.Gr: 2.00 

VP: <1 mmHg 

MLT: 365°F 

UEL: NA 

LEL: NA 

Noncombustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam/Daily 

Remove: When wet or contam 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

1 mg/m3

: Sa/ScbaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

See Appendix F 

Incompatibilities and Reactivities: Strong oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Acne-form derm; liver damage, jaun 

TO: Skin, liver 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

235
236

O 

1-Octadecanethiol Formula: 

CH3(CH2)17SH 

CAS#: 

2885-00-9 

RTECS#: IDLH: 

N.D. 

Conversion: 1 ppm = 11.72 mg/m3 DOT: 1228 131 (liquid) 

Synonyms/Trade Names: 1-Mercaptooctadecane, Octadecyl mercaptan, Stearyl mercaptan 

Exposure Limits: 

NIOSH REL: C 0.5 ppm (5.9 mg/m3

) [15-minute] 

OSHA PEL: none 

Physical Description: Solid or liquid (above 77°F). 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical 

Properties: 

MW: 286.6 

BP: ? 

Sol: Insoluble 

Fl.P: ? 

IP: ? 

Sp.Gr: 0.85 

VP: ? 

MLT: 77°F 

UEL: ? 

LEL: ? 

Combustible Solid 

Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

5 ppm: CcrOv/Sa 

12.5 ppm: Sa:Cf/PaprOv 

25 ppm: CcrFOv/GmFOv/PaprTOv/ 

 ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Oxidizers, reducing agents, strong acids & bases, alkali metals 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, resp sys; head, dizz, lass, cyan, nau, convuls

TO: Eyes, skin, resp sys, CNS, blood 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

Octane Formula: 

CH3[CH2]6CH3

CAS#: 

111-65-9 

RTECS#: 

RG8400000 

IDLH: 

1000 ppm [10%LEL]

Conversion: 1 ppm = 4.67 mg/m3 DOT: 1262 128 

Synonyms/Trade Names: n-Octane, normal-Octane 

Exposure Limits: 

NIOSH REL: TWA 75 ppm (350 mg/m3

) 

 C 385 ppm (1800 mg/m3

) [15-minute] 

OSHA PEL†: TWA 500 ppm (2350 mg/m3

) 

Physical Description: Colorless liquid with a gasoline-like odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1500 

OSHA 7 

Chemical & Physical 

Properties: 

MW: 114.2 

BP: 258°F 

Sol(77°F): 0.00007% 

Fl.P: 56°F 

IP: 9.82 eV 

Sp.Gr: 0.70 

VP: 10 mmHg 

FRZ: -70°F 

UEL: 6.5% 

LEL: 1.0% 

Class IB Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

750 ppm: Sa* 

1000 ppm: Sa:Cf*/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, nose; drow; derm; chemical pneu (aspir liquid); 

in animals: narco 

TO: Eyes, skin, resp sys, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 
237

O 

1-Octanethiol Formula: 

CH3(CH2)7SH 

CAS#: 

111-88-6 

RTECS#: IDLH: 

N.D. 

Conversion: 1 ppm = 5.98 mg/m3 DOT: 1228 131 

Synonyms/Trade Names: 1-Mercaptooctane, n-Octyl mercaptan, Octylthiol, 1-Octylthiol 

Exposure Limits: 

NIOSH REL: C 0.5 ppm (3.0 mg/m3

) [15-minute] 

OSHA PEL: none 

Physical Description: Water-white liquid with a mild odor. 

Measurement Methods 

(see Table 1): 

NIOSH 2510 

Chemical & Physical 

Properties: 

MW: 146.3 

BP: 390°F 

Sol: Insoluble 

Fl.P(oc): 115°F 

IP: ? 

Sp.Gr: 0.84 

VP(212°F): 3 mmHg 

FRZ: -57°F 

UEL: ? 

LEL: ? 

Class II Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

5 ppm: CcrOv/Sa 

12.5 ppm: Sa:Cf/PaprOv 

25 ppm: CcrFOv/GmFOv/PaprTOv/ 

 ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Oxidizers, reducing agents, strong acids & bases, alkali metals 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, nose, throat; lass, cyan, incr respiration, nau, 

drow, head, vomit 

TO: Eyes, skin, resp sys, blood, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

Oil mist (mineral) Formula: CAS#: 

8012-95-1 

RTECS#: 

PY8030000 

IDLH: 

2500 mg/m3

Conversion: DOT: 

Synonyms/Trade Names: Heavy mineral oil mist, Paraffin oil mist, White mineral oil mist 

Exposure Limits: 

NIOSH REL: TWA 5 mg/m3

 

 ST 10 mg/m3

OSHA PEL: TWA 5 mg/m3

Physical Description: Colorless, oily liquid aerosol dispersed in air. 

[Note: Has an odor like burned lubricating oil.] 

Measurement Methods 

(see Table 1): 

NIOSH 5026, 5524 

Chemical & Physical 

Properties: 

MW: Varies 

BP: 680°F 

Sol: Insoluble 

Fl.P(oc): 380°F 

IP: ? 

Sp.Gr: 0.90 

VP: <0.5 mmHg 

FRZ: 0°F 

UEL: ? 

LEL: ? 

Class IIIB Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: N.R. 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

50 mg/m3

: 100XQ/Sa 

125 mg/m3

: Sa:Cf/PaprHie 

250 mg/m3

: 100F/SaT:Cf/PaprTHie/ 

 ScbaF/SaF 

2500 mg/m3

: Sa:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Incompatibilities and Reactivities: None reported 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con 

SY: Irrit eyes, skin, resp sys 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Skin: Soap wash 

Breath: Fresh air 
238

O 

Osmium tetroxide Formula: 

OsO4

CAS#: 

20816-12-0 

RTECS#: 

RN1140000 

IDLH: 

1 mg/m3

Conversion: 1 ppm = 10.40 mg/m3 DOT: 2471 154 

Synonyms/Trade Names: Osmic acid anhydride, Osmium oxide 

Exposure Limits: 

NIOSH REL: TWA 0.002 mg/m3

 (0.0002 ppm) 

 ST 0.006 mg/m3

 (0.0006 ppm) 

OSHA PEL†: TWA 0.002 mg/m3

Physical Description: Colorless, crystalline solid or pale-yellow mass with an 

unpleasant, acrid, chlorine-like odor. [Note: A liquid above 105°F.] 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical Properties: 

MW: 254.2 

BP: 266°F 

Sol(77°F): 6% 

Fl.P: NA 

IP: 12.60 eV 

Sp.Gr: 5.10 

VP: 7 mmHg 

MLT: 105°F 

UEL: NA 

LEL: NA 

Noncombustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

0.1 mg/m3

: CcrFS100/GmFS100/ 

 ScbaF/SaF 

1 mg/m3

: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFS100/ScbaE 

Incompatibilities and Reactivities: Hydrochloric acid, easily oxidized organic materials 

[Note: Begins to sublime below BP. Contact with other materials may cause fire.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, resp sys; lac, vis dist; conj; head; cough, dysp; derm 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

Oxalic acid Formula: 

HOOCCOOH×2H2O 

CAS#: 

144-62-7 

RTECS#: 

RO2450000 

IDLH: 

500 mg/m3

Conversion: DOT: 

Synonyms/Trade Names: Ethanedioic acid, Oxalic acid (aqueous), Oxalic acid dihydrate 

Exposure Limits: 

NIOSH REL: TWA 1 mg/m3

 

 ST 2 mg/m3

OSHA PEL†: TWA 1 mg/m3

Physical Description: Colorless, odorless powder or granular solid. 

[Note: The anhydrous form (COOH)2 is an odorless, white solid.] 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical Properties: 

MW: 126.1 

BP: Sublimes 

Sol: 14% 

Fl.P: ? 

IP: ? 

Sp.Gr: 1.90 

VP: <0.001 mmHg 

MLT: 215°F (Sublimes) 

UEL: ? 

LEL: ? 

Combustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

25 mg/m3

: Sa:Cf£/PaprHie£ 

50 mg/m3

: 100F/ScbaF/SaF 

500 mg/m3

: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, silver compounds, strong alkalis, chlorites 

[Note: Gives off water of crystallization at 215°F and begins to sublime.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, muc memb; eye burns; local pain, cyan; 

shock, collapse, convuls; kidney damage 

TO: Eyes, skin, resp sys, kidneys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush prompt 

Breath: Resp support 

Swallow: Medical attention immed 
239

O 

Oxygen difluoride Formula: 

OF2

CAS#: 

7783-41-7 

RTECS#: 

RS2100000 

IDLH: 

0.5 ppm 

Conversion: 1 ppm = 2.21 mg/m3 DOT: 2190 124 

Synonyms/Trade Names: Difluorine monoxide, Fluorine monoxide, Oxygen fluoride 

Exposure Limits: 

NIOSH REL: C 0.05 ppm (0.1 mg/m3

) 

OSHA PEL†: TWA 0.05 ppm (0.1 mg/m3

) 

Physical Description: Colorless gas with a peculiar, foul odor. 

[Note: Shipped as a nonliquefied compressed gas.] 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical Properties: 

MW: 54.0 

BP: -230°F 

Sol: 0.02% 

Fl.P: NA 

IP: 13.11 eV 

RGasD: 1.88 

VP: >1 atm 

FRZ: -371°F 

UEL: NA 

LEL: NA 

Nonflammable Gas, but a strong 

oxidizer. 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

0.5 ppm: Sa/ScbaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFS¿/ScbaE 

Incompatibilities and Reactivities: Combustible materials, chlorine, bromine, iodine, platinum, metal oxides, 

moist air, hydrogen sulfide, hydrocarbons, water [Note: Reacts very slowly with water to form hydrofluoric acid.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con 

SY: Irrit eyes, skin, resp sys; head; pulm edema; eye, skin burns 

(from contact with the gas under pressure) 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Ozone Formula: 

O3

CAS#: 

10028-15-6 

RTECS#: 

RS8225000 

IDLH: 

5 ppm 

Conversion: 1 ppm = 1.96 mg/m3 DOT: 

Synonyms/Trade Names: Triatomic oxygen 

Exposure Limits: 

NIOSH REL: C 0.1 ppm (0.2 mg/m3

) 

OSHA PEL†: TWA 0.1 ppm (0.2 mg/m3

) 

Physical Description: Colorless to blue gas with a very pungent odor. 

Measurement Methods 

(see Table 1): 

OSHA ID214 

Chemical & Physical Properties: 

MW: 48.0 

BP: -169°F 

Sol(32°F): 0.001% 

Fl.P: NA 

IP: 12.52 eV 

RGasD: 1.66 

VP: >1 atm 

FRZ: -315°F 

UEL: NA 

LEL: NA 

Nonflammable Gas, but a powerful 

oxidizer. 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

1 ppm: CcrS¿/Sa 

2.5 ppm: Sa:Cf/PaprS¿ 

5 ppm: CcrFS¿/GmFS¿/SaT:Cf/ 

 ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFS¿/ScbaE 

Incompatibilities and Reactivities: All oxidizable materials (both organic & inorganic) 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con 

SY: Irrit eyes, muc memb; pulm edema; chronic resp disease 

TO: Eyes, resp sys 

First Aid (see Table 6): 

Eye: Medical attention 

Breath: Fresh air; 100% O2
240

P 

Paraffin wax fume Formula: 

CnH2n+2

CAS#: 

8002-74-2 

RTECS#: 

RV0350000 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: Paraffin fume, Paraffin scale fume 

Exposure Limits: 

NIOSH REL: TWA 2 mg/m3

OSHA PEL†: none 

Physical Description: Paraffin wax is a white to slightly yellowish, odorless solid. 

[Note: Consists of a mixture of high molecular weight hydrocarbons (e.g., C36H74).] 

Measurement Methods 

(see Table 1): 

OSHA PV2047 

Chemical & Physical Properties: 

MW: 350-420 

BP: ? 

Sol: Insoluble 

Fl.P: 390°F 

IP: ? 

Sp.Gr: 0.88-0.92 

VP: ? 

MLT: 115-154°F 

UEL: ? 

LEL: ? 

Combustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: Prevent eye contact 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: None reported 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con 

SY: Irrit eyes, skin, resp sys; discomfort, nau 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Breath: Resp support 

Paraquat (Paraquat dichloride) Formula: 

CH3(C5H4N)2CH3×2Cl 

CAS#: 

1910-42-5 

RTECS#: 

DW2275000 

IDLH: 

1 mg/m3

Conversion: DOT: 

Synonyms/Trade Names: 1,1'-Dimethyl-4,4'-bipyridinium dichloride; N,N'-Dimethyl-4,4'-bipyridinium dichloride; 

Paraquat chloride; Paraquat dichloride 

[Note: Paraquat is a cation (C12H14N2

++; 1,1-Dimethyl-4,4-bipyridinium ion); the commercial product is the 

dichloride salt of paraquat.] 

Exposure Limits: 

NIOSH REL: TWA 0.1 mg/m3

 (resp) [skin] 

OSHA PEL†: TWA 0.5 mg/m3

 (resp) [skin] 

Measurement Methods 

(see Table 1): 

NIOSH 5003 

Physical Description: Yellow solid with a faint, ammonia-like odor. [herbicide] 

[Note: Paraquat may also be found commercially as a methyl sulfate salt C12H14N2×2CH3SO4.] 

Chemical & Physical Properties: 

MW: 257.2 

BP: Decomposes 

Sol: Miscible 

Fl.P: NA 

IP: ? 

Sp.Gr: 1.24 

VP: <0.0000001 mmHg 

MLT: 572°F (Decomposes) 

UEL: NA 

LEL: NA 

Noncombustible Solid 

Personal Protection/Sanitation

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

1 mg/m3

: CcrOv95*/PaprOvHie*/ 

 Sa*/ScbaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, alkylaryl-sulfonate wetting agents 

[Note: Corrosive to metals. Decomposes in presence of ultraviolet light.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, nose, throat, resp sys; epis; derm; fingernail 

damage; irrit GI tract; heart, liver, kidney damage 

TO: Eyes, skin, resp sys, heart, liver, kidneys, GI tract 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 
241

P 

Parathion Formula: 

(C2H5O)2P(S)OC6H4NO2

CAS#: 

56-38-2 

RTECS#: 

TF4550000 

IDLH: 

10 mg/m3

Conversion: DOT: 2783 152 

Synonyms/Trade Names: O,O-Diethyl-O(p-nitrophenyl) phosphorothioate; Diethyl parathion; Ethyl parathion; 

Parathion-ethyl 

Exposure Limits: 

NIOSH REL: TWA 0.05 mg/m3

 [skin] 

OSHA PEL: TWA 0.1 mg/m3

 [skin] 

Physical Description: Pale-yellow to dark-brown liquid with a garlic-like odor. 

[Note: A solid below 43°F. Pesticide that may be absorbed on a dry carrier.] 

Measurement Methods 

(see Table 1): 

NIOSH 5600 

OSHA 62 

Chemical & Physical 

Properties: 

MW: 291.3 

BP: 707°F 

Sol: 0.001% 

Fl.P(oc): 392°F 

IP: ? 

Sp.Gr: 1.27 

VP: 0.00004 mmHg 

FRZ: 43°F 

UEL: ? 

LEL: ? 

Class IIIB Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

0.5 mg/m3

: CcrOv95/Sa 

1.25 mg/m3

: Sa:Cf/PaprOvHie 

2.5 mg/m3

: CcrFOv100/SaT:Cf/ 

 PaprTOvHie/ScbaF/SaF 

10 mg/m3

: Sa:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, alkaline materials 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, resp sys; miosis; rhin; head; chest tight, wheez, lar 

spasm, salv, cyan; anor, nau, vomit, abdom cramps, diarr; sweat; musc 

fasc, lass, para; dizz, conf, ataxia; convuls, coma; low BP; card irreg 

TO: Eyes, skin, resp sys, CNS, CVS, blood chol 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

Particulates not otherwise regulated Formula: CAS#: RTECS#: IDLH: 

N.D.

Conversion: DOT: 

Synonyms/Trade Names: ”Inert” dusts, Nuisance dusts, PNOR 

[Note: Includes all inert or nuisance dusts, whether mineral, inorganic, not listed specifically in 1910.1000.] 

Exposure Limits: 

NIOSH REL: See Appendix D 

OSHA PEL: TWA 15 mg/m3

 (total) 

 TWA 5 mg/m3

 (resp) 

Physical Description: Dusts from solid substances without specific occupational 

exposure standards. 

Measurement Methods 

(see Table 1): 

NIOSH 0500, 0600 

Chemical & Physical Properties: 

Properties vary depending upon the 

specific solid. 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Varies 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con 

SY: Irrit eyes, skin, throat, upper resp sys 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Breath: Fresh air 
242

P 

Pentaborane Formula: 

B5H9

CAS#: 

19624-22-7 

RTECS#: 

RY8925000 

IDLH: 

1 ppm 

Conversion: 1 ppm = 2.58 mg/m3 DOT: 1380 135 

Synonyms/Trade Names: Pentaboron nonahydride 

Exposure Limits: 

NIOSH REL: TWA 0.005 ppm (0.01 mg/m3

) 

 ST 0.015 ppm (0.03 mg/m3

) 

OSHA PEL†: TWA 0.005 ppm (0.01 mg/m3

) 

Physical Description: Colorless liquid with a pungent odor like sour milk. 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical 

Properties: 

MW: 63.1 

BP: 140°F 

Sol: Reacts 

Fl.P: 86°F 

IP: 9.90 eV 

Sp.Gr: 0.62 

VP: 171 mmHg 

FRZ: -52°F 

UEL: ? 

LEL: 0.42% 

Class IC Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

0.05 ppm: Sa 

0.125 ppm: Sa:Cf 

0.25 ppm: SaT:Cf/ScbaF/SaF 

1 ppm: Sa:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFS/ScbaE 

Incompatibilities and Reactivities: Oxidizers, halogens, water, halogenated hydrocarbons 

[Note: May ignite SPONTANEOUSLY in moist air. Corrosive to natural rubber. Hydrolyzes slowly with heat 

in water to form boric acid.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin; dizz, head, drow, inco, tremor, convuls, 

behavioral changes; tonic spasm face, neck, abdom, limbs 

TO: Eyes, skin, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

Pentachloroethane Formula: 

CHCl2CCl3

CAS#: 

76-01-7 

RTECS#: 

KI6300000 

IDLH: 

N.D. 

Conversion: DOT: 1669 151 

Synonyms/Trade Names: Ethane pentachloride, Pentalin 

Exposure Limits: 

NIOSH REL: Handle with care in the workplace. 

 See Appendix C (Chloroethanes) 

OSHA PEL: none 

Physical Description: Colorless liquid with a sweetish, chloroform-like odor. 

Measurement Methods 

(see Table 1): 

NIOSH 2517 

Chemical & Physical Properties: 

MW: 202.3 

BP: 322°F 

Sol: 0.05% 

Fl.P: ? 

IP: 11.28 eV 

Sp.Gr: 1.68 

VP: 3 mmHg 

FRZ: -20°F 

UEL: ? 

LEL: ? 

Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: (Sodium-potassium alloy + bromoform), alkalis, metals, water 

[Note: Hydrolysis produces dichloroacetic acid. Reaction with alkalis & metals produces spontaneously 

explosive chloroacetylenes.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: In animals: irrit eyes, skin; lass, restless, irreg respiration, 

musc inco; liver, kidney, lung changes 

TO: Eyes, skin, resp sys, CNS, liver, kidneys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash 

Breath: Resp support 

Swallow: Medical attention immed 
243

P 

Pentachloronaphthalene Formula: 

C10H3Cl5

CAS#: 

1321-64-8 

RTECS#: 

QK0300000 

IDLH: 

See Appendix F 

Conversion: DOT: 

Synonyms/Trade Names: Halowax® 1013; 1,2,3,4,5-Pentachloronaphthalene 

Exposure Limits: 

NIOSH REL: TWA 0.5 mg/m3

 [skin] 

OSHA PEL: TWA 0.5 mg/m3

 [skin] 

Physical Description: Pale-yellow or white solid or powder with an aromatic odor. 

Measurement Methods 

(see Table 1): 

NIOSH S96 (II-2) 

Chemical & Physical 

Properties: 

MW: 300.4 

BP: 636°F 

Sol: Insoluble 

Fl.P: NA 

IP: ? 

Sp.Gr: 1.67 

VP: <1 mmHg 

MLT: 248°F 

UEL: NA 

LEL: NA 

Noncombustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

5 mg/m3

: Sa*/ScbaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

See Appendix F 

Incompatibilities and Reactivities: Strong oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Head, lass, dizz, anor; pruritus, acne-form skin eruptions; 

jaun, liver nec 

TO: Skin, liver, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap prompt/molten flush immed 

Breath: Resp support 

Swallow: Medical Attention immed 

Pentachlorophenol Formula: 

C6Cl5OH 

CAS#: 

87-86-5 

RTECS#: 

SM6300000 

IDLH: 

2.5 mg/m3

Conversion: DOT: 3155 154 

Synonyms/Trade Names: PCP; Penta; 2,3,4,5,6-Pentachlorophenol 

Exposure Limits: 

NIOSH REL: TWA 0.5 mg/m3

 [skin] 

OSHA PEL: TWA 0.5 mg/m3

 [skin] 

Physical Description: Colorless to white, crystalline solid with a benzene-like odor. 

[fungicide] 

Measurement Methods 

(see Table 1): 

NIOSH 5512 

Chemical & Physical 

Properties: 

MW: 266.4 

BP: 588°F (Decomposes) 

Sol: 0.001% 

Fl.P: NA 

IP: NA 

Sp.Gr: 1.98 

VP(77°F): 0.0001 mmHg 

MLT: 374°F 

UEL: NA 

LEL: NA 

Noncombustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

2.5 mg/m3

: CcrOv95*/PaprOvHie*/ 

 Sa*/ScbaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, acids, alkalis 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, nose, throat; sneez, cough; lass, anor, low-wgt; 

sweat; head, dizz; nau, vomit; dysp, chest pain; high fever; derm 

TO: Eyes, skin, resp sys, CVS, liver, kidneys, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 
244

P 

Pentaerythritol Formula: 

C(CH2OH)4

CAS#: 

115-77-5 

RTECS#: 

RZ2490000 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: 2,2-bis(Hydroxymethyl)-1,3-propanediol; Methane tetramethylol; Monopentaerythritol; 

PE; Tetrahydroxymethylolmethane; Tetramethylolmethane 

Exposure Limits: 

NIOSH REL: TWA 10 mg/m3

 (total) 

 TWA 5 mg/m3

 (resp) 

OSHA PEL†: TWA 15 mg/m3

 (total) 

 TWA 5 mg/m3

 (resp) 

Physical Description: Colorless to white, crystalline, odorless powder. 

[Note: Technical grade is 88% monopentaerythritol & 12% dipentaerythritol.] 

Measurement Methods 

(see Table 1): 

NIOSH 0500, 0600 

Chemical & Physical Properties: 

MW: 136.2 

BP: Sublimes 

Sol(59°F): 6% 

Fl.P: ? 

IP: ? 

Sp.Gr: 1.38 

VP: 0.00000008 mmHg 

MLT: 500°F (Sublimes) 

UEL: ? 

LEL: ? 

Combustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Organic acids, oxidizers 

[Note: Explosive compound is formed when a mixture of PE & thiophosphoryl chloride is heated.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, resp sys 

TO: Eyes, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water wash 

Breath: Fresh air 

Swallow: Medical attention immed 

n-Pentane Formula: 

CH3[CH2]3CH3

CAS#: 

109-66-0 

RTECS#: 

RZ9450000 

IDLH: 

1500 ppm [10%LEL]

Conversion: 1 ppm = 2.95 mg/m3 DOT: 1265 128 

Synonyms/Trade Names: Pentane, normal-Pentane 

Exposure Limits: 

NIOSH REL: TWA 120 ppm (350 mg/m3

) 

 C 610 ppm (1800 mg/m3

) [15-minute] 

OSHA PEL†: TWA 1000 ppm (2950 mg/m3

) 

Physical Description: Colorless liquid with a gasoline-like odor. 

[Note: A gas above 97°F. May be utilized as a fuel.] 

Measurement Methods 

(see Table 1): 

NIOSH 1500 

OSHA 7 

Chemical & Physical Properties: 

MW: 72.2 

BP: 97°F 

Sol: 0.04% 

Fl.P: -57°F 

IP: 10.34 eV 

Sp.Gr: 0.63 

VP: 420 mmHg 

FRZ: -202°F 

UEL: 7.8% 

LEL: 1.5% 

Class IA Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

1200 ppm: Sa 

1500 ppm: Sa:Cf/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, nose; derm; chemical pneu (aspir liquid); 

drow; in animals: narco 

TO: Eyes, skin, resp sys, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 
245

P 

1-Pentanethiol Formula: 

CH3(CH2)4SH 

CAS#: 

110-66-7 

RTECS#: 

SA3150000 

IDLH: 

N.D. 

Conversion: 1 ppm = 4.26 mg/m3 DOT: 1111 130 

Synonyms/Trade Names: Amyl hydrosulfide, Amyl mercaptan, Amyl sulfhydrate, Pentyl mercaptan 

Exposure Limits: 

NIOSH REL: C 0.5 ppm (2.1 mg/m3

) [15-minute] 

OSHA PEL: none 

Physical Description: Water-white to yellowish liquid with a strong, garlic-like odor. 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical 

Properties: 

MW: 104.2 

BP: 260°F 

Sol: Insoluble 

Fl.P(oc): 65°F 

IP: ? 

Sp.Gr: 0.84 

VP(77°F): 14 mmHg 

FRZ: -104°F 

UEL: ? 

LEL: ? 

Class IB Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

5 ppm: CcrOv/Sa 

12.5 ppm: Sa:Cf/PaprOv 

25 ppm: CcrFOv/GmFOv/PaprTOv/ 

 ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Oxidizers, reducing agents, alkali metals, calcium hypochlorite, 

concentrated nitric acid 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, nose, throat, resp sys; head, nau, dizz; vomit, 

diarr; derm, skin sens 

TO: Eyes, skin, resp sys, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

2-Pentanone Formula: 

CH3COCH2CH2CH3

CAS#: 

107-87-9 

RTECS#: 

SA7875000 

IDLH: 

1500 ppm 

Conversion: 1 ppm = 3.52 mg/m3 DOT: 1249 127 

Synonyms/Trade Names: Ethyl acetone, Methyl propyl ketone, MPK 

Exposure Limits: 

NIOSH REL: TWA 150 ppm (530 mg/m3

) 

OSHA PEL†: TWA 200 ppm (700 mg/m3

) 

Physical Description: Colorless to water-white liquid with a characteristic 

acetone-like odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1300, 2555 

Chemical & Physical 

Properties: 

MW: 86.1 

BP: 215°F 

Sol: 6% 

Fl.P: 45°F 

IP: 9.39 eV 

Sp.Gr: 0.81 

VP: 27 mmHg 

FRZ: -108°F 

UEL: 8.2% 

LEL: 1.5% 

Class IB Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

1500 ppm: CcrOv*/PaprOv*/GmFOv/ 

 Sa*/ScbaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Oxidizers, bromine trifluoride 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, muc memb; head; derm; narco, coma 

TO: Eyes, skin, resp sys, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush 

Breath: Resp support 

Swallow: Medical attention immed 
246

P 

Perchloromethyl mercaptan Formula: 

Cl3CSCl 

CAS#: 

594-42-3 

RTECS#: 

PB0370000 

IDLH: 

10 ppm 

Conversion: 1 ppm = 7.60 mg/m3 DOT: 1670 157 

Synonyms/Trade Names: PCM, PMM, Trichloromethane sulfenyl chloride, Trichloromethyl sulfur chloride 

Exposure Limits: 

NIOSH REL: TWA 0.1 ppm (0.8 mg/m3

) 

OSHA PEL: TWA 0.1 ppm (0.8 mg/m3

) 

Physical Description: Pale-yellow, oily liquid with an unbearable, acrid odor. 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical Properties: 

MW: 185.9 

BP: 297°F (Decomposes) 

Sol: Insoluble 

Fl.P: NA 

IP: ? 

Sp.Gr: 1.69 

VP: 3 mmHg 

FRZ: ? 

UEL: NA 

LEL: NA 

Noncombustible Liquid, but will 

support combustion. 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

1 ppm: CcrOv*/Sa* 

2.5 ppm: Sa:Cf*/PaprOv* 

5 ppm: CcrFOv/GmFOv/PaprTOv*/ 

 SaT:Cf*/ScbaF/SaF 

10 ppm: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Alkalis, amines, hot iron, water 

[Note: Corrosive to most metals. Forms HCl, sulfur & CO2 on contact with water.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, nose, throat; lac; cough, dysp, deep breath pain, 

coarse rales; vomit; pallor, tacar; acidosis; anuria; liver, kidney damage 

TO: Eyes, skin, resp sys, liver, kidneys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

Perchloryl fluoride Formula: 

ClO3F 

CAS#: 

7616-94-6 

RTECS#: 

SD1925000 

IDLH: 

100 ppm 

Conversion: 1 ppm = 4.19 mg/m3 DOT: 3083 124 

Synonyms/Trade Names: Chlorine fluoride oxide, Chlorine oxyfluoride, Trioxychlorofluoride 

Exposure Limits: 

NIOSH REL: TWA 3 ppm (14 mg/m3

) 

 ST 6 ppm (28 mg/m3

) 

OSHA PEL†: TWA 3 ppm (13.5 mg/m3

) 

Physical Description: Colorless gas with a characteristic, sweet odor. 

[Note: Shipped as a liquefied compressed gas.] 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical Properties: 

MW: 102.5 

BP: -52°F 

Sol: 0.06% 

Fl.P: NA 

IP: 13.60 eV 

RGasD: 3.64 

VP: 10.5 atm 

FRZ: -234°F 

UEL: NA 

LEL: NA 

Nonflammable Gas, but will support 

combustion. 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Frostbite 

Eyes: Frostbite 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Provide: Frostbite wash 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

30 ppm: Sa 

75 ppm: Sa:Cf* 

100 ppm: ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFS¿/ScbaE 

Incompatibilities and Reactivities: Combustibles, strong bases, amines, finely divided metals, reducing agents, 

alcohols 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con (liquid) 

SY: Irrit resp sys; liquid: frostbite; in animals: methemo; cyan; 

lass, dizz, head; pulm edema; pneu; anoxia 

TO: Skin, resp sys, blood 

First Aid (see Table 6): 

Eye: Frostbite 

Skin: Frostbite 

Breath: Resp support 
247

P 

Perlite Formula: CAS#: 

93763-70-3 

RTECS#: 

SD5254000 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: Expanded perlite 

[Note: An amorphous material consisting of fused sodium potassium aluminum silicate.] 

Exposure Limits: 

NIOSH REL: TWA 10 mg/m3

 (total) 

 TWA 5 mg/m3

 (resp) 

OSHA PEL: TWA 15 mg/m3

 (total) 

 TWA 5 mg/m3

 (resp) 

Physical Description: Odorless, light-gray to glassy-black solid. 

[Note: Expanded perlite is a fluffy, white particulate.] 

Measurement Methods 

(see Table 1): 

NIOSH 0500, 0600 

Chemical & Physical Properties: 

MW: varies 

BP: ? 

Sol: <1% 

Fl.P: NA 

IP: NA 

Sp.Gr: 2.2 - 2.4 (crude) 

 0.05 - 0.3 (expanded) 

VP: 0 mmHg (approx) 

MLT: >2000°F 

UEL: NA 

LEL: NA 

Noncombustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: None reported 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con 

SY: Irrit eyes, skin, throat, upper resp sys 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Breath: Fresh air 

Petroleum distillates (naphtha) Formula: CAS#: 

8002-05-9 

RTECS#: 

SE7449000 

IDLH: 

1100 ppm [10%LEL] 

Conversion: 1 ppm = 4.05 mg/m3 DOT: 

Synonyms/Trade Names: Aliphatic petroleum naphtha, Petroleum naphtha, Rubber solvent 

Exposure Limits: 

NIOSH REL: TWA 350 mg/m3

 

 C 1800 mg/m3

 [15-minute] 

OSHA PEL†: TWA 500 ppm (2000 mg/m3

) 

Measurement Methods 

(see Table 1): 

NIOSH 1550 

Physical Description: Colorless liquid with a gasoline- or kerosene-like odor. 

[Note: A mixture of paraffins (C5 to C13) that may contain a small amount of aromatic hydrocarbons.] 

Chemical & Physical 

Properties: 

MW: 99 (approx) 

BP: 86-460°F 

Sol: Insoluble 

Fl.P: -40 to -86°F 

IP: ? 

Sp.Gr: 0.63-0.66 

VP: 40 mmHg (approx) 

FRZ: -99°F 

UEL: 5.9% 

LEL: 1.1% 

Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

850 ppm: Sa 

1100 ppm: Sa:Cf*/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, nose, throat; dizz, drow, head, nau; dry cracked 

skin; chemical pneu (aspir liquid) 

TO: Eyes, skin, resp sys, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 
248

P 

Phenol Formula: 

C6H5OH 

CAS#: 

108-95-2 

RTECS#: 

SJ3325000 

IDLH: 

250 ppm 

Conversion: 1 ppm = 3.85 mg/m3 DOT: 1671 153 (solid); 2312 153 (molten); 2821 153 (solution) 

Synonyms/Trade Names: Carbolic acid, Hydroxybenzene, Monohydroxybenzene, Phenyl alcohol, 

Phenyl hydroxide 

Exposure Limits: 

NIOSH REL: TWA 5 ppm (19 mg/m3

) [skin] 

 C 15.6 ppm (60 mg/m3

) [15-minute] 

OSHA PEL: TWA 5 ppm (19 mg/m3

) [skin] 

Physical Description: Colorless to light-pink, crystalline solid with a sweet, acrid odor. 

[Note: Phenol liquefies by mixing with about 8% water.] 

Measurement Methods 

(see Table 1): 

NIOSH 2546 

OSHA 32 

Chemical & Physical 

Properties: 

MW: 94.1 

BP: 359°F 

Sol(77°F): 9% 

Fl.P: 175°F 

IP: 8.50 eV 

Sp.Gr: 1.06 

VP: 0.4 mmHg 

MLT: 109°F 

UEL: 8.6% 

LEL: 1.8% 

Combustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

50 ppm: CcrOv95/Sa 

125 ppm: Sa:Cf/PaprOvHie 

250 ppm: CcrFOv100/GmFOv100/ 

 PaprTOvHie/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, calcium hypochlorite, aluminum chloride, acids 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, nose, throat; anor, low-wgt; lass, musc ache, pain; 

dark urine; cyan; liver, kidney damage; skin burns; derm; 

ochronosis; tremor, convuls, twitch 

TO: Eyes, skin, resp sys, liver, kidneys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

Phenothiazine Formula: 

S(C6H4)2NH 

CAS#: 

92-84-2 

RTECS#: 

SN5075000 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: Dibenzothiazine, Fenothiazine, Thiodiphenylamine 

Exposure Limits: 

NIOSH REL: TWA 5 mg/m3

 [skin] 

OSHA PEL†: none 

Physical Description: Grayish-green to greenish-yellow solid. [insecticide] 

Measurement Methods 

(see Table 1): 

OSHA PV2048 

Chemical & Physical Properties: 

MW: 199.3 

BP: 700°F 

Sol: Insoluble 

Fl.P: ? 

IP: ? 

Sp.Gr: ? 

VP: 0 mmHg (approx) 

MLT: 365°F 

UEL: ? 

LEL: ? 

Combustible Solid, but not a high fire risk. 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: N.R. 

Wash skin: When contam/Daily 

Remove: When wet or contam 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: None reported 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Itching, irrit, reddening skin; hepatitis, hemolytic anemia, 

abdom cramps, tacar; kidney damage; skin photo sens 

TO: Skin, CVS, liver, kidneys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 
249

P 

p-Phenylene diamine Formula: 

C6H4(NH2)2

CAS#: 

106-50-3 

RTECS#: 

SS8050000 

IDLH: 

25 mg/m3

Conversion: DOT: 1673 153 

Synonyms/Trade Names: 4-Aminoaniline; 1,4-Benzenediamine; p-Diaminobenzene; 1,4-Diaminobenzene; 

1,4-Phenylene diamine 

Exposure Limits: 

NIOSH REL: TWA 0.1 mg/m3

 [skin] 

OSHA PEL: TWA 0.1 mg/m3

 [skin] 

Physical Description: White to slightly red, crystalline solid. 

Measurement Methods 

(see Table 1): 

OSHA 87 

Chemical & Physical 

Properties: 

MW: 108.2 

BP: 513°F 

Sol(75°F): 4% 

Fl.P: 312°F 

IP: 6.89 eV 

Sp.Gr: ? 

VP: <1 mmHg 

MLT: 295°F 

UEL: ? 

LEL: ? 

Combustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam/Daily 

Remove: When wet or contam 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

2.5 mg/m3

: Sa:Cf£ 

5 mg/m3

: ScbaF/SaF 

25 mg/m3

: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFS100/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit pharynx, larynx; bronchial asthma; sens derm 

TO: Resp sys, skin 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 

Phenyl ether (vapor) Formula: 

C6H5OC6H5

CAS#: 

101-84-8 

RTECS#: 

KN8970000 

IDLH: 

100 ppm 

Conversion: 1 ppm = 6.96 mg/m3 DOT: 

Synonyms/Trade Names: Diphenyl ether, Diphenyl oxide, Phenoxy benzene, Phenyl oxide 

Exposure Limits: 

NIOSH REL: TWA 1 ppm (7 mg/m3

) 

OSHA PEL: TWA 1 ppm (7 mg/m3

) 

Physical Description: Colorless, crystalline solid or liquid (above 82°F) with a 

geranium-like odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1617 

OSHA PV2022 

Chemical & Physical 

Properties: 

MW: 170.2 

BP: 498°F 

Sol: Insoluble 

Fl.P: 239°F 

IP: 8.09 eV 

Sp.Gr: 1.08 

VP(77°F): 0.02 mmHg 

MLT: 82°F 

UEL: 6.0% 

LEL: 0.7% 

Combustible Solid 

Class IIIB Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

25 ppm: Sa:Cf£/PaprOvHie£ 

50 ppm: CcrFOv100/GmFOv100/ 

 ScbaF/SaF 

100 ppm: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con 

SY: Irrit eyes, nose, skin; nau 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 
250

P 

Phenyl ether-biphenyl mixture (vapor) Formula: 

C6H5OC6H5/C6H5C6H5

CAS#: 

8004-13-5 

RTECS#: 

DV1500000 

IDLH: 

10 ppm 

Conversion: 1 ppm = 6.79 mg/m3 (approx) DOT: 

Synonyms/Trade Names: Diphenyl oxide-diphenyl mixture, Dowtherm® A 

Exposure Limits: 

NIOSH REL: TWA 1 ppm (7 mg/m3

) 

OSHA PEL: TWA 1 ppm (7 mg/m3

) 

Physical Description: Colorless to straw-colored liquid or solid (below 54°F) with a 

disagreeable, aromatic odor. 

[Note: A mixture typically contains 75% phenyl ether & 25% biphenyl.] 

Measurement Methods 

(see Table 1): 

NIOSH 2013 

Chemical & Physical 

Properties: 

MW: 166 (approx) 

BP: 495°F 

Sol: Insoluble 

Fl.P: 239°F 

IP: ? 

Sp.Gr(77°F): 1.06 

VP(77°F): 0.08 mmHg 

FRZ: 54°F 

UEL: ? 

LEL: ? 

Class IIIB Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

10 ppm: Sa:Cf£/CcrFOv100/GmFOv100/ 

 PaprOvHie£/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con 

SY: Irrit eyes, nose, skin; nau 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Phenyl glycidyl ether Formula: 

C9H10O2

CAS#: 

122-60-1 

RTECS#: 

TZ3675000 

IDLH: 

Ca [100 ppm] 

Conversion: 1 ppm = 6.14 mg/m3 DOT: 

Synonyms/Trade Names: 1,2-Epoxy-3-phenoxy propane; Glycidyl phenyl ether; PGE; 

Phenyl 2,3-epoxypropyl ether 

Exposure Limits: 

NIOSH REL: Ca 

 C 1 ppm (6 mg/m3

) [15-minute] 

 See Appendix A 

OSHA PEL†: TWA 10 ppm (60 mg/m3

) 

Physical Description: Colorless liquid. [Note: A solid below 38°F.] 

Measurement Methods 

(see Table 1): 

NIOSH 1619 

OSHA 7 

Chemical & Physical 

Properties: 

MW: 150.1 

BP: 473°F 

Sol: 0.2% 

Fl.P: 248°F 

IP: ? 

Sp.Gr: 1.11 

VP: 0.01 mmHg 

FRZ: 38°F 

UEL: ? 

LEL: ? 

Class IIIB Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, amines, strong acids, strong bases 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin; upper resp sys; skin sens; narco; possible hemato, 

repro effects; [carc] 

TO: Eyes, skin, CNS, hemato sys, repro sys [in animals: nasal cancer] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 
251

P 

Phenylhydrazine Formula: 

C6H5NHNH2

CAS#: 

100-63-0 

RTECS#: 

MV8925000 

IDLH: 

Ca [15 ppm] 

Conversion: 1 ppm = 4.42 mg/m3 DOT: 2572 153 

Synonyms/Trade Names: Hydrazinobenzene, Monophenylhydrazine 

Exposure Limits: 

NIOSH REL: Ca 

 C 0.14 ppm (0.6 mg/m3

) [2-hr] [skin] 

 See Appendix A 

OSHA PEL†: TWA 5 ppm (22 mg/m3

) [skin] 

Measurement Methods 

(see Table 1): 

NIOSH 3518 

Physical Description: Colorless to pale-yellow liquid or solid (below 67°F) with a faint, aromatic odor. 

Chemical & Physical Properties: 

MW: 108.1 

BP: 470°F (Decomposes) 

Sol: Slight 

Fl.P: 190°F 

IP: 7.64 eV 

Sp.Gr: 1.10 

VP(77°F): 0.04 mmHg 

FRZ: 67°F 

UEL: ? 

LEL: ? 

Class IIIA Combustible Liquid 

Combustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam/Daily 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, lead dioxide 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Skin sens, hemolytic anemia, dysp, cyan; jaun; kidney damage; 

vascular thrombosis; [carc] 

TO: Blood, resp sys, liver, kidneys, skin [in animals: tumors of the lungs, 

liver, blood vessels & intestine] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

N-Phenyl-β-naphthylamine Formula: 

C10H7NHC6H5

CAS#: 

135-88-6 

RTECS#: 

QM4550000 

IDLH: 

Ca [N.D.] 

Conversion: DOT: 

Synonyms/Trade Names: 2-Anilinonaphthalene, β-Naphthylphenylamine, PBNA, 2-Phenylaminonaphthalene, 

Phenyl-β-naphthylamine 

Exposure Limits: 

NIOSH REL: Ca* 

 See Appendix A 

 [*Note: Since metabolized to β-Naphthylamine.] 

OSHA PEL: none 

Physical Description: White to yellow crystals or gray to tan flakes or powder. 

[Note: Commercial product may contain 20-30 ppm of β-Naphthylamine.] 

Measurement Methods 

(see Table 1): 

OSHA 96 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam/Daily 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Chemical & Physical Properties: 

MW: 219.3 

BP: 743°F 

Sol: Insoluble 

Fl.P: ? 

IP: ? 

Sp.Gr: 1.24 

VP: ? 

MLT: 226°F 

UEL: ? 

LEL: ? 

Combustible Solid Incompatibilities and Reactivities: Oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irritation; leucoplakia; acne, hypersensitivity to sunlight; [carc] 

TO: Eyes, skin, bladder [bladder cancer] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 
252

P 

Phenylphosphine Formula: 

C6H5PH2

CAS#: 

638-21-1 

RTECS#: 

SZ2100000 

IDLH: 

N.D. 

Conversion: 1 ppm = 4.50 mg/m3 DOT: 

Synonyms/Trade Names: Fenylfosfin, PF, Phosphaniline 

Exposure Limits: 

NIOSH REL: C 0.05 ppm (0.25 mg/m3

) 

OSHA PEL†: none 

Physical Description: Clear, colorless liquid with a foul odor. 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical Properties: 

MW: 110.1 

BP: 320°F 

Sol: Insoluble 

Fl.P: ? 

IP: ? 

Sp.Gr(59°F): 1.001 

VP: ? 

FRZ: ? 

UEL: ? 

LEL: ? 

Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: Daily 

Remove: When wet or contam 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: None reported [Note: Spontaneously combustible in high concentrations 

in air. Potential exposure to gaseous PF when polyphosphinates are heated above 392°F.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: In animals: blood changes, anemia, testicular degeneration; 

loss of appetite, diarr, lac, hind leg tremor; derm 

TO: Blood, CNS, skin, repro sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash 

Breath: Resp support 

Swallow: Medical attention immed 

Phorate Formula: 

(C2H5O)2P(S)SCH2SC2H5

CAS#: 

298-02-2 

RTECS#: 

TD9450000 

IDLH: 

N.D. 

Conversion: DOT: 3018 152 (organophosphorus pesticide, liquid, toxic) 

Synonyms/Trade Names: O,O-Diethyl S-(ethylthio)methylphosphorodithioate; 

O,O-Diethyl S-ethylthiomethylthiothionophosphate; Thimet; Timet 

Exposure Limits: 

NIOSH REL: TWA 0.05 mg/m3

 

 ST 0.2 mg/m3

 [skin] 

OSHA PEL†: none 

Physical Description: Clear liquid with a skunk-like odor. [insecticide] 

Measurement Methods 

(see Table 1): 

NIOSH 5600 

Chemical & Physical Properties: 

MW: 260.4 

BP: ? 

Sol: 0.005% 

Fl.P(oc): 320°F 

IP: ? 

Sp.Gr(77°F): 1.16 

VP: 0.0008 mmHg 

FRZ: -45°F 

UEL: ? 

LEL: ? 

Class IIIB Combustible Liquid, but does 

not readily ignite. 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Water, alkalis [Note: Hydrolyzed in the presence of moisture and by alkalis.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, resp sys; miosis; rhin; head; chest tight, wheez, lar 

spasm, salv, cyan; anor, nau, vomit, abdom cramps, diarr; sweat; musc fasc, 

lass, para; dizz, conf, ataxia; convuls, coma; low BP; card irreg 

TO: Eyes, skin, resp sys, CNS, CVS, blood chol 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap flush immed 

Breath: Resp support 

Swallow: Medical attention immed 
253

P 

Phosdrin Formula: 

C7H13PO6

CAS#: 

7786-34-7 

RTECS#: 

GQ5250000 

IDLH: 

4 ppm 

Conversion: 1 ppm = 9.17 mg/m3 DOT: 2783 152 

Synonyms/Trade Names: 2-Carbomethoxy-1-methylvinyl dimethyl phosphate, Mevinphos 

[Note: Commercial product is a mixture of the cis- & trans-isomers.] 

Exposure Limits: 

NIOSH REL: TWA 0.01 ppm (0.1 mg/m3

) [skin] 

 ST 0.03 ppm (0.3 mg/m3

) 

OSHA PEL†: TWA 0.1 mg/m3

 [skin] 

Physical Description: Pale-yellow to orange liquid with a weak odor. 

[Note: Insecticide that may be absorbed on a dry carrier.] 

Measurement Methods 

(see Table 1): 

NIOSH 5600 

Chemical & Physical Properties: 

MW: 224.2 

BP: Decomposes 

Sol: Miscible 

Fl.P(oc): 347°F 

IP: ? 

Sp.Gr: 1.25 

VP: 0.003 mmHg 

FRZ: 44°F (trans-) 

 70°F (cis-) 

UEL: ? 

LEL: ? 

Class IIIB Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

0.1 ppm: Sa 

0.25 ppm: Sa:Cf 

0.5 ppm: SaT:Cf/ScbaF/SaF 

4 ppm: Sa:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers [Note: Corrosive to cast iron, some stainless steels & brass.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, resp sys; miosis; rhin; head; chest tight, wheez, lar 

spasm, salv, cyan; anor, nau, vomit, abdom cramps, diarr; para; ataxia, 

convuls; low BP, card irreg 

TO: Eyes, skin, resp sys, CNS, CVS, blood chol 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

Phosgene Formula: 

COCl2

CAS#: 

75-44-5 

RTECS#: 

SY5600000 

IDLH: 

2 ppm 

Conversion: 1 ppm = 4.05 mg/m3 DOT: 1076 125 

Synonyms/Trade Names: Carbon oxychloride, Carbonyl chloride, Carbonyl dichloride, Chloroformyl chloride 

Exposure Limits: 

NIOSH REL: TWA 0.1 ppm (0.4 mg/m3

) 

 C 0.2 ppm (0.8 mg/m3

) [15-minute] 

OSHA PEL: TWA 0.1 ppm (0.4 mg/m3

) 

Physical Description: Colorless gas with a suffocating odor like musty hay. 

[Note: A fuming liquid below 47°F. Shipped as a liquefied compressed gas.] 

Measurement Methods 

(see Table 1): 

OSHA 61 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact (liquid) 

Eyes: Prevent eye contact (liquid) 

Wash skin: When contam (liquid) 

Remove: When wet or contam 

(liquid) 

Change: N.R. 

Provide: Quick drench (liquid) 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

1 ppm: Sa* 

2 ppm: ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFS/ScbaE 

Chemical & Physical Properties: 

MW: 98.9 

BP: 47°F 

Sol: Slight 

Fl.P: NA 

IP: 11.55 eV 

RGasD: 3.48 

Sp.Gr: 1.43 (Liquid at 32°F) 

VP: 1.6 atm 

FRZ: -198°F 

UEL: NA 

LEL: NA 

Nonflammable Gas 

Incompatibilities and Reactivities: Moisture, alkalis, ammonia, alcohols, 

copper 

[Note: Reacts slowly in water to form hydrochloric acid & carbon dioxide.]

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con (liquid) 

SY: Irrit eyes; dry burning throat; vomit; cough, foamy sputum, 

dysp, chest pain, cyan; liquid: frostbite 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed (liquid) 

Skin: Water flush immed (liquid) 

Breath: Resp support 
254

P 

Phosphine Formula: 

PH3

CAS#: 

7803-51-2 

RTECS#: 

SY7525000 

IDLH: 

50 ppm 

Conversion: 1 ppm = 1.39 mg/m3 DOT: 2199 119 

Synonyms/Trade Names: Hydrogen phosphide, Phosphorated hydrogen, Phosphorus hydride, 

Phosphorus trihydride 

Exposure Limits: 

NIOSH REL: TWA 0.3 ppm (0.4 mg/m3

) 

 ST 1 ppm (1 mg/m3

) 

OSHA PEL†: TWA 0.3 ppm (0.4 mg/m3

) 

Physical Description: Colorless gas with a fish- or garlic-like odor. [pesticide] 

[Note: Shipped as a liquefied compressed gas. Pure compound is odorless.] 

Measurement Methods 

(see Table 1): 

OSHA 1003, ID180 

Chemical & Physical Properties: 

MW: 34.0 

BP: -126°F 

Sol: Slight 

Fl.P: NA (Gas) 

IP: 9.96 eV 

RGasD: 1.18 

VP: 41.3 atm 

FRZ: -209°F 

UEL: ? 

LEL: 1.79% 

Flammable Gas 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Frostbite 

Eyes: Frostbite 

Wash skin: N.R. 

Remove: When wet (flamm) 

Change: N.R. 

Provide: Frostbite wash 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

3 ppm: Sa 

7.5 ppm: Sa:Cf 

15 ppm: GmFS/ScbaF/SaF 

50 ppm: Sa:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFS/ScbaE 

Incompatibilities and Reactivities: Air, oxidizers, chlorine, acids, moisture, halogenated hydrocarbons, copper 

[Note: May ignite SPONTANEOUSLY on contact with air.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con (liquid) 

SY: Nau, vomit, abdom pain, diarr; thirst; chest tight, dysp; musc 

pain, chills; stupor or syncope; pulm edema; liquid: frostbite 

TO: Resp sys 

First Aid (see Table 6): 

Eye: Frostbite 

Skin: Frostbite 

Breath: Resp support 

Phosphoric acid Formula: 

H3PO4

CAS#: 

7664-38-2 

RTECS#: 

TB6300000 

IDLH: 

1000 mg/m3

Conversion: DOT: 1805 154 (liquid or solution); 3453 154 (solid) 

Synonyms/Trade Names: Orthophosphoric acid, Phosphoric acid (aqueous), White phosphoric acid 

Exposure Limits: 

NIOSH REL: TWA 1 mg/m3

 

 ST 3 mg/m3

OSHA PEL†: TWA 1 mg/m3

Measurement Methods 

(see Table 1): 

NIOSH 7903 

OSHA ID165SG 

Physical Description: Thick, colorless, odorless, crystalline solid. [Note: Often used in an aqueous solution.] 

Chemical & Physical Properties: 

MW: 98.0 

BP: 415°F 

Sol: Miscible 

Fl.P: NA 

IP: ? 

Sp.Gr(77°F): 1.87 (pure) 

 1.33 (50% solution) 

VP: 0.03 mmHg 

MLT: 108°F 

UEL: NA 

LEL: NA 

Noncombustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash (>1.6%) 

 Quick drench (>1.6%) 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

25 mg/m3

: Sa:Cf* 

50 mg/m3

: 100F/ScbaF/SaF 

1000 mg/m3

: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Incompatibilities and Reactivities: Strong caustics, most metals [Note: Readily reacts with metals to form 

flammable hydrogen gas. DO NOT MIX WITH SOLUTIONS CONTAINING BLEACH OR AMMONIA.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, upper resp sys; eye, skin, burns; derm 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush Immed 

Breath: Resp support 

Swallow: Medical attention immed 
255

P 

Phosphorus (yellow) Formula: 

P4

CAS#: 

7723-14-0 

RTECS#: 

TH3500000 

IDLH: 

5 mg/m3

Conversion: DOT: 1381 136 

Synonyms/Trade Names: Elemental phosphorus, White phosphorus 

Exposure Limits: 

NIOSH REL: TWA 0.1 mg/m3

OSHA PEL: TWA 0.1 mg/m3

Physical Description: White to yellow, soft, waxy solid with acrid fumes in air. 

[Note: Usually shipped or stored in water.] 

Measurement Methods 

(see Table 1): 

NIOSH 7905 

Chemical & Physical 

Properties: 

MW: 124.0 

BP: 536°F 

Sol: 0.0003% 

Fl.P: ? 

IP: ? 

Sp.Gr: 1.82 

VP: 0.03 mmHg 

MLT: 111°F 

UEL: ? 

LEL: ? 

Flammable Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact* 

 [*Note: Flame retardant personal 

 protective equipment should be 

 provided.] 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

1 mg/m3

: Sa 

2.5 mg/m3

: Sa:Cf£ 

5 mg/m3

: ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: ScbaE 

Incompatibilities and Reactivities: Air, oxidizers (including elemental sulfur & strong caustics), halogens 

[Note: Ignites SPONTANEOUSLY in moist air.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, resp tract; eye, skin burns; abdom pain, nau, jaun; 

anemia; cachexia; dental pain, salv, jaw pain, swell 

TO: Eyes, skin, resp sys, liver, kidneys, jaw, teeth, blood 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

Phosphorus oxychloride Formula: 

POCl3

CAS#: 

10025-87-3 

RTECS#: 

TH4897000 

IDLH: 

N.D. 

Conversion: 1 ppm = 6.27 mg/m3 DOT: 1810 137 

Synonyms/Trade Names: Phosphorus chloride, Phosphorus oxytrichloride, Phosphoryl chloride 

Exposure Limits: 

NIOSH REL: TWA 0.1 ppm (0.6 mg/m3

) 

 ST 0.5 ppm (3 mg/m3

) 

OSHA PEL†: none 

Measurement Methods 

(see Table 1): 

None available 

Physical Description: Clear, colorless to yellow, oily liquid with a pungent & musty odor. 

[Note: A solid below 34°F.] 

Chemical & Physical Properties: 

MW: 153.3 

BP: 222°F 

Sol: Decomposes 

Fl.P: NA 

IP: ? 

Sp.Gr(77°F): 1.65 

VP(81°F): 40 mmHg 

FRZ: 34°F 

UEL: NA 

LEL: NA 

Noncombustible Liquid, but may set fire 

to combustible materials. 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Water, combustible materials, carbon disulfide, dimethyl-formamide, metals 

(except nickel & lead) [Note: Decomposes in water to hydrochloric & phosphoric acids.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, resp sys; eye, skin burns; dysp, cough, pulm 

edema; dizz, head, lass; abdom pain, nau, vomit; neph 

TO: Eyes, skin, resp sys, CNS, kidneys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 
256

P 

Phosphorus pentachloride Formula: 

PCl5

CAS#: 

10026-13-8 

RTECS#: 

TB6125000 

IDLH: 

70 mg/m3

Conversion: DOT: 1806 137 

Synonyms/Trade Names: Pentachlorophosphorus, Phosphoric chloride, Phosphorus perchloride 

Exposure Limits: 

NIOSH REL: TWA 1 mg/m3

OSHA PEL: TWA 1 mg/m3

Physical Description: White to pale-yellow, crystalline solid with a pungent, 

unpleasant odor. 

Measurement Methods 

(see Table 1): 

NIOSH S257 (II-5) 

Chemical & Physical Properties: 

MW: 208.3 

BP: Sublimes 

Sol: Reacts 

Fl.P: NA 

IP: ? 

Sp.Gr: 3.60 

VP(132°F): 1 mmHg 

MLT: 324°F (Sublimes) 

UEL: NA 

LEL: NA 

Noncombustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

10 mg/m3

: Sa* 

25 mg/m3

: Sa:Cf* 

50 mg/m3

: ScbaF/SaF 

70 mg/m3

: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Incompatibilities and Reactivities: Water, magnesium oxide, chemically-active metals such as sodium and 

potassium, alkalis, amines 

[Note: Hydrolyzes in water (even in humid air) to form hydrochloric acid & phosphoric acid. Corrosive to metals.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, resp sys; bron; derm 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

Phosphorus pentasulfide Formula: 

P2S5/P4S10

CAS#: 

1314-80-3 

RTECS#: 

TH4375000 

IDLH: 

250 mg/m3

Conversion: DOT: 1340 139 

Synonyms/Trade Names: Phosphorus persulfide, Phosphorus sulfide, Sulfur phosphide 

Exposure Limits: 

NIOSH REL: TWA 1 mg/m3

 

 ST 3 mg/m3

OSHA PEL†: TWA 1 mg/m3

Measurement Methods 

(see Table 1): 

None available 

Physical Description: Greenish-gray to yellow, crystalline solid with an odor of rotten eggs. 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

10 mg/m3

: Sa* 

25 mg/m3

: Sa:Cf* 

50 mg/m3

: ScbaF/SaF 

250 mg/m3

: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFS100/ScbaE 

Chemical & Physical Properties: 

MW: 222.3 (P2S5) 

 444.6 (P4S10) 

BP: 957°F 

Sol: Reacts 

Fl.P: ? 

IP: ? 

Sp.Gr: 2.09 

VP(572°F): 1 mmHg 

MLT: 550°F 

UEL: ? 

LEL: ? 

Flammable Solid, which may 

SPONTANEOUSLY ignite in 

presence of moisture. 

Incompatibilities and Reactivities: Water, alcohols, strong oxidizers, acids, 

alkalis [Note: Reacts with water to form hydrogen sulfide, sulfur dioxide, and 

phosphoric acid.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, resp sys; apnea, coma, convuls; conj pain, lac, photo, 

kerato-conj, corn vesic; dizz; head; lass; irrity, insom; GI dist 

TO: Eyes, skin, resp sys, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Dust off solid; water flush 

Breath: Resp support 

Swallow: Medical attention immed 
257

P 

Phosphorus trichloride Formula: 

PCl3

CAS#: 

7719-12-2 

RTECS#: 

TH3675000 

IDLH: 

25 ppm 

Conversion: 1 ppm = 5.62 mg/m3 DOT: 1809 137 

Synonyms/Trade Names: Phosphorus chloride 

Exposure Limits: 

NIOSH REL: TWA 0.2 ppm (1.5 mg/m3

) 

 ST 0.5 ppm (3 mg/m3

) 

OSHA PEL†: TWA 0.5 ppm (3 mg/m3

) 

Physical Description: Colorless to yellow, fuming liquid with an odor like 

hydrochloric acid. 

Measurement Methods 

(see Table 1): 

NIOSH 6402 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

10 ppm: ScbaF/SaF 

25 ppm: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFS¿/ScbaE 

Chemical & Physical Properties: 

MW: 137.4 

BP: 169°F 

Sol: Reacts 

Fl.P: NA 

IP: 9.91 eV 

Sp.Gr: 1.58 

VP: 100 mmHg 

FRZ: -170°F 

UEL: NA 

LEL: NA 

Noncombustible Liquid; however, a 

strong oxidizer that may ignite 

combustibles upon contact. 

Incompatibilities and Reactivities: Water, chemically-active metals such as 

sodium & potassium, aluminum, strong nitric acid, acetic acid, organic matter 

[Note: Hydrolyzes in water to form hydrochloric acid and phosphoric acid.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, nose, throat; pulm edema; eye, skin burns 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

Phthalic anhydride Formula: 

C6H4(CO)2O 

CAS#: 

85-44-9 

RTECS#: 

TI3150000 

IDLH: 

60 mg/m3

Conversion: 1 ppm = 6.06 mg/m3 DOT: 2214 156 

Synonyms/Trade Names: 1,2-Benzenedicarboxylic anhydride; PAN; Phthalic acid anhydride 

Exposure Limits: 

NIOSH REL: TWA 6 mg/m3

 (1 ppm) 

OSHA PEL†: TWA 12 mg/m3

 (2 ppm) 

Physical Description: White solid (flake) or a clear, colorless, mobile liquid (molten) 

with a characteristic, acrid odor. 

Measurement Methods 

(see Table 1): 

NIOSH S179 (II-3) 

OSHA 90 

Chemical & Physical Properties: 

MW: 148.1 

BP: 563°F 

Sol: 0.6% 

Fl.P: 305°F 

IP: 10.00 eV 

Sp.Gr: 1.53 (Flake) 

 1.20 (Molten) 

VP: 0.0015 mmHg 

MLT: 267°F 

UEL: 10.5% 

LEL: 1.7% 

Combustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

30 mg/m3

: Qm* 

60 mg/m3

: 95XQ*/95F/PaprHie*/ 

 Sa*/ScbaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, water [Note: Converted to phthalic acid in hot water.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, upper resp sys; conj; nasal ulcer bleeding; 

bron, bronchial asthma; derm; in animals: liver, kidney damage 

TO: Eyes, skin, resp sys, liver, kidneys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 
258

P 

m-Phthalodinitrile Formula: 

C6H4(CN)2

CAS#: 

626-17-5 

RTECS#: 

CZ1900000 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: 1,3-Benzenedicarbonitrile; m-Dicyanobenzene; 1,3-Dicyanobenzene; 

Isophthalodinitrile; m-PDN 

Exposure Limits: 

NIOSH REL: TWA 5 mg/m3

OSHA PEL†: none 

Physical Description: Needle-like, colorless to white, crystalline, flaky solid with an 

almond-like odor. 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical Properties: 

MW: 128.1 

BP: Sublimes 

Sol: Slight 

Fl.P: ? 

IP: ? 

Sp.Gr: 4.42 

VP: 0.01 mmHg 

MLT: 324°F (Sublimes) 

UEL: ? 

LEL: ? 

Combustible Solid and a severe 

explosion hazard. 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: Daily 

Remove: When wet or contam 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Strong oxidizers (e.g., chlorine, bromine, fluorine) 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Head, nau, conf; in animals: irrit eyes, skin 

TO: Eyes, skin, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

Picloram Formula: 

C6H3Cl3O2N2

CAS#: 

1918-02-1 

RTECS#: 

TJ7525000 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: 4-Amino-3,5,6-trichloropicolinic acid; 4-Amino-3,5,6-trichloro-2-picolinic acid; 

ATCP; Tordon® 

Exposure Limits: 

NIOSH REL: See Appendix D 

OSHA PEL†: TWA 15 mg/m3

 (total) TWA 5 mg/m3 (resp) 

Physical Description: Colorless to white crystals with a chlorine-like odor. [herbicide] 

Measurement Methods 

(see Table 1): 

NIOSH 0500, 0600 

Chemical & Physical Properties: 

MW: 241.5 

BP: Decomposes 

Sol: 0.04% 

Fl.P: ? 

IP: ? 

Sp.Gr: ? 

VP(95°F): 0.0000006 mmHg 

MLT: 424°F (Decomposes) 

UEL: ? 

LEL: ? 

Combustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: N.R. 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Hot concentrated alkali (hydrolyzes) 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, resp sys; nau; in animals: liver, kidney changes 

TO: Eyes, skin, resp sys, liver, kidneys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash 

Breath: Fresh air 

Swallow: Medical attention immed 
259

P 

Picric acid Formula: 

(NO2)3C6H2OH 

CAS#: 

88-89-1 

RTECS#: 

TJ7875000 

IDLH: 

75 mg/m3

Conversion: 1 ppm = 9.37 mg/m3 DOT: 1344 113 (wet, ≥ 10% water); 

3364 113 (wetted, ≥ 10% water) 

Synonyms/Trade Names: Phenol trinitrate; 2,4,6-Trinitrophenol [Note: An OSHA Class A Explosive (1910.109).] 

Exposure Limits: 

NIOSH REL: TWA 0.1 mg/m3

 

 ST 0.3 mg/m3

 [skin] 

OSHA PEL: TWA 0.1 mg/m3

 [skin] 

Physical Description: Yellow, odorless solid. [Note: Usually used as an aqueous 

solution.] 

Measurement Methods 

(see Table 1): 

NIOSH S228 (II-4) 

Chemical & Physical Properties: 

MW: 229.1 

BP: Explodes above 572°F 

Sol: 1% 

Fl.P: 302°F 

IP: ? 

Sp.Gr: 1.76 

VP(383°F): 1 mmHg 

MLT: 252°F 

UEL: ? 

LEL: ? 

Combustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam/Daily 

Remove: When wet or contam 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

0.5 mg/m3

: Qm 

1 mg/m3

: 95XQ/Sa 

2.5 mg/m3

: Sa:Cf/PaprHie 

5 mg/m3

: 100F/SaT:Cf/PaprTHie/ 

 ScbaF/SaF 

75 mg/m3

: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Incompatibilities and Reactivities: Copper, lead, zinc & other metals; salts; plaster; concrete; ammonia 

[Note: Corrosive to metals. An explosive mixture results when the aqueous solution crystallizes.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin; sens derm; yellow-stained hair, skin; lass, myalgia, 

anuria, polyuria; bitter taste, GI dist; hepatitis, hema, album, neph 

TO: Eyes, skin, kidneys, liver, blood 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 

Pindone Formula: 

C9H5O2C(O)C(CH3)3

CAS#: 

83-26-1 

RTECS#: 

NK6300000 

IDLH: 

100 mg/m3

Conversion: DOT: 

Synonyms/Trade Names: tert-Butyl valone; 1,3-Dioxo-2-pivaloy-lindane; Pival®; Pivalyl; 2-Pivalyl-1,3-indandione 

Exposure Limits: 

NIOSH REL: TWA 0.1 mg/m3

OSHA PEL: TWA 0.1 mg/m3

Physical Description: Bright-yellow powder with almost no odor. [rodenticide] 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical Properties: 

MW: 230.3 

BP: Decomposes 

Sol(77°F): 0.002% 

Fl.P: ? 

IP: ? 

Sp.Gr: 1.06 

VP: Very low 

MLT: 230°F 

UEL: ? 

LEL: ? 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

0.5 mg/m3

: Qm 

1 mg/m3

: 95XQ/Sa 

2.5 mg/m3

: Sa:Cf/PaprHie 

5 mg/m3

: 100F/SaT:Cf/PaprTHie/ 

 ScbaF/SaF 

100 mg/m3

: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Incompatibilities and Reactivities: None reported 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing 

SY: Epis, excess bleeding from minor cuts, bruises; smoky urine, black 

tarry stools; abdom, back pain 

TO: Blood prothrombin 

First Aid (see Table 6): 

Eye: Irr immed 

Breath: Resp support 

Swallow: Medical attention immed 
260

P 

Piperazine dihydrochloride Formula: 

C4H10N2×2HCl 

CAS#: 

142-64-3 

RTECS#: 

TL4025000 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: Piperazine hydrochloride 

[Note: The monochloride, C4H10N2×HCl is also commercially available.] 

Exposure Limits: 

NIOSH REL: TWA 5 mg/m3

OSHA PEL†: none 

Physical Description: White to cream-colored needles or powder. 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical Properties: 

MW: 159.1 

BP: ? 

Sol: 41% 

Fl.P: ? 

IP: ? 

Sp.Gr: ? 

VP: ? 

MLT: 635°F 

UEL: ? 

LEL: ? 

Combustible Solid, but does not 

ignite easily. 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Water [Note: Slightly hygroscopic (i.e., absorbs moisture from the air).] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, resp sys; skin burns, sens; asthma; GI upset, 

head, nau, vomit, inco, musc weak 

TO: Eyes, skin, resp sys, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

Plaster of Paris Formula: 

CaSO4•0.5H2O 

CAS#: 

26499-65-0 

RTECS#: 

TP0700000 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: Calcium sulfate hemihydrate, Dried calcium sulfate, Gypsum hemihydrate, 

Hemihydrate gypsum 

[Note: Plaster of Paris is the hemihydrate form of Calcium Sulfate & Gypsum is the dihydrate form.] 

Exposure Limits: 

NIOSH REL: TWA 10 mg/m3

 (total) 

 TWA 5 mg/m3

 (resp) 

OSHA PEL: TWA 15 mg/m3

 (total) 

 TWA 5 mg/m3

 (resp) 

Physical Description: White or yellowish, finely divided, odorless powder. 

Measurement Methods 

(see Table 1): 

NIOSH 0500, 0600 

Chemical & Physical Properties: 

MW: 145.2 

BP: ? 

Sol(77°F): 0.3% 

Fl.P: NA 

IP: NA 

Sp.Gr: 2.5 

VP: 0 mmHg (approx) 

MLT: 325°F (Loses H2O) 

UEL: NA 

LEL: NA 

Noncombustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Moisture, water 

[Note: Hygroscopic (i.e., absorbs moisture from the air). Reacts with water to form Gypsum.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, muc memb, resp sys; cough 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Breath: Resp support 

Swallow: Medical attention immed 
261

P 

Platinum Formula: 

Pt 

CAS#: 

7440-06-4 

RTECS#: 

TP2160000 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: Platinum black, Platinum metal, Platinum sponge 

Exposure Limits: 

NIOSH REL: TWA 1 mg/m3

OSHA PEL†: none 

Physical Description: Silvery, whitish-gray, malleable, ductile metal. 

Measurement Methods 

(see Table 1): 

NIOSH 7300, 7303 

OSHA ID121, ID130SG 

Chemical & Physical Properties: 

MW: 195.1 

BP: 6921°F 

Sol: Insoluble 

Fl.P: NA 

IP: NA 

Sp.Gr: 21.45 

VP: 0 mmHg (approx) 

MLT: 3222°F 

UEL: NA 

LEL: NA 

Noncombustible Solid in bulk form, but finely 

divided powder can be dangerous to handle. 

Personal Protection/Sanitation

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Aluminum, acetone, arsenic, ethane, hydrazine, hydrogen peroxide, lithium, 

phosphorus, selenium, tellurium, various fluorides 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit skin, resp sys; derm 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash 

Breath: Resp support 

Swallow: Medical attention immed 

Platinum (soluble salts, as Pt) Formula: CAS#: RTECS#: IDLH: 

4 mg/m3

 (as Pt) 

Conversion: DOT: 

Synonyms/Trade Names: Synonyms vary depending upon the specific soluble platinum salt. 

Exposure Limits: 

NIOSH REL: TWA 0.002 mg/m3

OSHA PEL: TWA 0.002 mg/m3

Physical Description: Appearance and odor vary depending upon the specific 

soluble platinum salt. 

Measurement Methods 

(see Table 1): 

NIOSH 7300, 7303, S191 (II-7) 

Chemical & Physical 

Properties: 

Properties vary depending upon 

the specific soluble platinum salt. 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

0.05 mg/m3

: Sa:Cf£ 

0.1 mg/m3

: 100F/ScbaF/SaF 

4 mg/m3

: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Incompatibilities and Reactivities: Varies 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, nose; cough, dysp, wheez, cyan; derm, sens skin; 

lymphocytosis 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 
262

P 

Portland cement Formula: CAS#: 

65997-15-1 

RTECS#: 

VV8770000 

IDLH: 

5000 mg/m3

Conversion: DOT: 

Synonyms/Trade Names: Cement, Hydraulic cement, Portland cement silicate [Note: A class of hydraulic 

cements containing tri- and dicalcium silicate in addition to alumina, tricalcium aluminate, and iron oxide.] 

Exposure Limits: 

NIOSH REL: TWA 10 mg/m3

 (total) 

 TWA 5 mg/m3

 (resp) 

OSHA PEL†: TWA 50 mppcf 

Physical Description: Gray, odorless powder. 

Measurement Methods 

(see Table 1): 

NIOSH 0500 

OSHA ID207 

Chemical & Physical Properties: 

MW: ? 

BP: NA 

Sol: Insoluble 

Fl.P: NA 

IP: NA 

Sp.Gr: ? 

VP: 0 mmHg (approx) 

MLT: NA 

UEL: NA 

LEL: NA 

Noncombustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

50 mg/m3

: Qm 

100 mg/m3

: 95XQ/Sa 

250 mg/m3

: Sa:Cf/PaprHie 

500 mg/m3

: 100F/SaT:Cf/PaprTHie/ 

 ScbaF/SaF 

5000 mg/m3

: Sa:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Incompatibilities and Reactivities: None reported 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, nose; cough, expectoration; exertional dysp, 

wheez, chronic bron; derm 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Fresh air 

Swallow: Medical attention immed 

Potassium cyanide (as CN) Formula: 

KCN 

CAS#: 

151-50-8 

RTECS#: 

TS8750000 

IDLH: 

25 mg/m3

 (as CN)

Conversion: DOT: 1680 157 (solid); 3413 157 (solution) 

Synonyms/Trade Names: Potassium salt of hydrocyanic acid 

Exposure Limits: 

NIOSH REL*: C 5 mg/m3

 (4.7 ppm) [10-minute] 

OSHA PEL*: TWA 5 mg/m3

 

[*Note: The REL and PEL also apply to other cyanides (as CN) except Hydrogen 

cyanide.] 

Measurement Methods 

(see Table 1): 

NIOSH 6010, 7904 

Physical Description: White, granular or crystalline solid with a faint, almond-like odor. 

Chemical & Physical Properties: 

MW: 65.1 

BP: 2957°F 

Sol(77°F): 72% 

Fl.P: NA 

IP: NA 

Sp.Gr: 1.55 

VP: 0 mmHg (approx) 

MLT: 1173°F 

UEL: NA 

LEL: NA 

Noncombustible Solid, but contact 

with acids releases highly flammable 

hydrogen cyanide. 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

25 mg/m3

: Sa/ScbaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFS100/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers (such as acids, acid salts, chlorates & nitrates) 

[Note: Absorbs moisture from the air forming a syrup.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, upper resp sys; asphy; lass, head, conf; nau, vomit; 

incr resp rate, slow gasping respiration; thyroid, blood changes 

TO: Eyes, skin, resp sys, CVS, CNS, thyroid, blood 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 
263

P 

Potassium hydroxide Formula: 

KOH 

CAS#: 

1310-58-3 

RTECS#: 

TT2100000 

IDLH: 

N.D. 

Conversion: DOT: 1813 154 (dry, solid); 1814 154 (solution) 

Synonyms/Trade Names: Caustic potash, Lye, Potassium hydrate 

Exposure Limits: 

NIOSH REL: C 2 mg/m3

OSHA PEL†: none 

Physical Description: Odorless, white or slightly yellow lumps, rods, flakes, sticks, or 

pellets. [Note: May be used as an aqueous solution.] 

Measurement Methods 

(see Table 1): 

NIOSH 7401 

Chemical & Physical Properties: 

MW: 56.1 

BP: 2415°F 

Sol(59°F): 107% 

Fl.P: NA 

IP: ? 

Sp.Gr: 2.04 

VP(1317°F): 1 mmHg 

MLT: 716°F 

UEL: NA 

LEL: NA 

Noncombustible Solid; however, may 

react with H2O & other substances 

and generate sufficient heat to ignite 

combustible materials. 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Acids, water, metals (when wet), halogenated hydrocarbons, maleic anhydride 

[Note: Heat is generated if KOH comes in contact with H2O & CO2 from the air.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, resp sys; cough, sneez; eye, skin burns; 

vomit, diarr 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

Propane Formula: 

CH3CH2CH3

CAS#: 

74-98-6 

RTECS#: 

TX2275000 

IDLH: 

2100 ppm [10%LEL] 

Conversion: 1 ppm = 1.80 mg/m3 DOT: 1075 115; 1978 115 

Synonyms/Trade Names: Bottled gas, Dimethyl methane, n-Propane, Propyl hydride 

Exposure Limits: 

NIOSH REL: TWA 1000 ppm (1800 mg/m3

) 

OSHA PEL: TWA 1000 ppm (1800 mg/m3

) 

Physical Description: Colorless, odorless gas. [Note: A foul-smelling odorant is 

often added when used for fuel purposes. Shipped as a liquefied compressed gas.] 

Measurement Methods 

(see Table 1): 

NIOSH S87 (II-2) 

OSHA PV2077 

Chemical & Physical Properties: 

MW: 44.1 

BP: -44°F 

Sol: 0.01% 

Fl.P: NA (Gas) 

IP: 11.07 eV 

RGasD: 1.55 

VP(70°F): 8.4 atm 

FRZ: -306°F 

UEL: 9.5% 

LEL: 2.1% 

Flammable Gas 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Frostbite 

Eyes: Frostbite 

Wash skin: N.R. 

Remove: When wet (flamm) 

Change: N.R. 

Provide: Frostbite wash 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

2100 ppm: Sa/ScbaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: ScbaE 

Incompatibilities and Reactivities: Strong oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con (liquid) 

SY: Dizz, conf, excitation, asphy; liquid: frostbite 

TO: CNS 

First Aid (see Table 6): 

Eye: Frostbite 

Skin: Frostbite 

Breath: Resp support 
264

P 

Propane sultone Formula: 

C3H6O3S 

CAS#: 

1120-71-4 

RTECS#: 

RP5425000 

IDLH: 

Ca [N.D.] 

Conversion: DOT: 

Synonyms/Trade Names: 3-Hydroxy-1-propanesulphonic acid sultone; 1,3-Propane sultone 

Exposure Limits: 

NIOSH REL: Ca 

 See Appendix A 

OSHA PEL: none 

Physical Description: White, crystalline solid or a colorless liquid (above 86°F). 

[Note: Releases a foul odor as it melts.] 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical 

Properties: 

MW: 122.2 

BP: ? 

Sol: 10% 

Fl.P: >235°F 

IP: ? 

Sp.Gr: 1.39 

VP: ? 

MLT: 86°F 

UEL: ? 

LEL: ? 

Combustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam/Daily 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Incompatibilities and Reactivities: None reported 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, resp sys; [carc] 

TO: Eyes, skin, resp sys [in animals: skin tumors, leukemia, gliomas] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

1-Propanethiol Formula: 

CH3CH2CH2SH 

CAS#: 

107-03-9 

RTECS#: 

TZ7300000 

IDLH: 

N.D. 

Conversion: 1 ppm = 3.12 mg/m3 DOT: 2402 130 

Synonyms/Trade Names: 3-Mercaptopropane, Propane-1-thiol, Propyl mercaptan, n-Propyl mercaptan 

Exposure Limits: 

NIOSH REL: C 0.5 ppm (1.6 mg/m3

) [15-minute] 

OSHA PEL: none 

Physical Description: Colorless liquid with an offensive, cabbage-like odor. 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical Properties: 

MW: 76.2 

BP: 153°F 

Sol: Slight 

Fl.P: -5°F 

IP: 9.195 eV 

Sp.Gr: 0.84 

VP(77°F): 155 mmHg 

FRZ: -172°F 

UEL: ? 

LEL: ? 

Class IB Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: Prevent eye contact 

Wash skin: N.R. 

Remove: When wet (flamm) 

Change: N.R. 

Provide: Eyewash 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

5 ppm: CcrOv/Sa 

12.5 ppm: Sa:Cf/PaprOv 

25 ppm: CcrFOv/GmFOv/PaprTOv/ 

 ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Oxidizers, reducing agents, strong acids & bases, alkali metals, 

calcium hypochlorite 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, nose, throat, resp sys; head, nau, dizz, cyan; 

in animals: liver, kidney damage 

TO: Eyes, skin, resp sys, CNS, blood, liver, kidneys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash 

Breath: Resp support 

Swallow: Medical attention immed 
265

P 

Propargyl alcohol Formula: 

C3H3OH 

CAS#: 

107-19-7 

RTECS#: 

UK5075000 

IDLH: 

N.D. 

Conversion: 1 ppm = 2.29 mg/m3 DOT: 1986 131 

Synonyms/Trade Names: 1-Propyn-3-ol; 2-Propyn-1-ol; 2-Propynyl alcohol 

Exposure Limits: 

NIOSH REL: TWA 1 ppm (2 mg/m3

) [skin] 

OSHA PEL†: none 

Physical Description: Colorless to straw-colored liquid with a mild, geranium odor. 

Measurement Methods 

(see Table 1): 

OSHA 97 

Chemical & Physical Properties: 

MW: 56.1 

BP: 237°F 

Sol: Miscible 

Fl.P(oc): 97°F 

IP: 10.51 eV 

Sp.Gr: 0.97 

VP: 12 mmHg 

FRZ: -62°F 

UEL: ? 

LEL: ? 

Class IC Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Phosphorus pentoxide, oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit skin, muc memb; CNS depres; in animals: liver, kidney damage 

TO: Skin, resp sys, CNS, liver, kidneys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush prompt 

Breath: Resp support 

Swallow: Medical attention immed 

β-Propiolactone Formula: 

C3H4O2

CAS#: 

57-57-8 

RTECS#: 

RQ7350000 

IDLH: 

Ca [N.D] 

Conversion: DOT: 

Synonyms/Trade Names: BPL; Hydroacrylic acid, β-lactone; 3-Hydroxy-β-lactone; 3-Hydroxy-propionic acid; 

β-Lactone; 2-Oxetanone; 3-Propiolactone 

Exposure Limits: 

NIOSH REL: Ca 

 See Appendix A 

OSHA PEL: [1910.1013] 

 See Appendix B 

Physical Description: Colorless liquid with a slightly sweet odor. 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical Properties: 

MW: 72.1 

BP: 323°F (Decomposes) 

Sol: 37% 

Fl.P: 165°F 

IP: ? 

Sp.Gr: 1.15 

VP(77°F): 3 mmHg 

FRZ: -28°F 

UEL: ? 

LEL: 2.9% 

Class IIIA Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam/Daily 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

See Appendix E (page 351) 

Incompatibilities and Reactivities: Acetates, halogens, thiocyanates, thiosulfates 

[Note: May polymerize upon storage.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Skin irrit, blistering, burns; corn opac; frequent urination; 

dysuria; hema; [carc] 

TO: Kidneys, skin, lungs, eyes [in animals: tumors of the liver, 

skin & stomach] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 
266

P 

Propionic acid Formula: 

CH3CH2COOH 

CAS#: 

79-09-4 

RTECS#: 

UE5950000 

IDLH: 

N.D. 

Conversion: 1 ppm = 3.03 mg/m3 DOT: 1848 132 

Synonyms/Trade Names: Carboxyethane, Ethanecarboxylic acid, Ethylformic acid, Metacetonic acid, 

Methyl acetic acid, Propanoic acid 

Exposure Limits: 

NIOSH REL: TWA 10 ppm (30 mg/m3

) 

 ST 15 ppm (45 mg/m3

) 

OSHA PEL†: none 

Physical Description: Colorless, oily liquid with a pungent, disagreeable, rancid odor. 

[Note: A solid below 5°F.] 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical Properties: 

MW: 74.1 

BP: 286°F 

Sol: Miscible 

Fl.P: 126°F 

IP: 10.24 eV 

Sp.Gr: 0.99 

VP: 3 mmHg 

FRZ: 5°F 

UEL: 12.1% 

LEL: 2.9% 

Class II Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Alkalis, strong oxidizers (e.g., chromium trioxide) [Note: Corrosive to steel.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, nose, throat; blurred vision, corn burns; skin 

burns; abdom pain, nau, vomit 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

Propionitrile Formula: 

CH3CH2CN 

CAS#: 

107-12-0 

RTECS#: 

UF9625000 

IDLH: 

N.D. 

Conversion: 1 ppm = 2.25 mg/m3 DOT: 2404 131 

Synonyms/Trade Names: Cyanoethane, Ethyl cyanide, Propanenitrile, Propionic nitrile, Propiononitrile 

Exposure Limits: 

NIOSH REL: TWA 6 ppm (14 mg/m3

) 

OSHA PEL: none 

Physical Description: Colorless liquid with a pleasant, sweetish, ethereal odor. 

[Note: Forms cyanide in the body.] 

Measurement Methods 

(see Table 1): 

NIOSH 1606 (adapt) 

Chemical & Physical 

Properties: 

MW: 55.1 

BP: 207°F 

Sol: 11.9% 

Fl.P: 36°F 

IP: 11.84 eV 

Sp.Gr: 0.78 

VP: 35 mmHg 

FRZ: -133°F 

UEL: ? 

LEL: 3.1% 

Class IB Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

60 ppm: CcrOv/Sa 

150 ppm: Sa:Cf/PaprOv 

300 ppm: CcrFOv/GmFOv/PaprTOv/ 

 ScbaF/SaF 

1000 ppm: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers & reducing agents, strong acids & bases 

[Note: Hydrogen cyanide is produced when propionitrile is heated to decomposition.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, resp sys; nau, vomit; chest pain; lass; stupor, 

convuls; in animals: liver, kidney damage 

TO: Eyes, skin, resp sys, CVS, CNS, liver, kidneys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 
267

P 

Propoxur Formula: 

CH3NHCOOC6H4OCH(CH3)2

CAS#: 

114-26-1 

RTECS#: 

FC3150000 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: Aprocarb®, o-Isopropoxyphenyl-N-methylcarbamate, 

N-Methyl-2-isopropoxyphenyl-carbamate 

Exposure Limits: 

NIOSH REL: TWA 0.5 mg/m3

OSHA PEL†: none 

Physical Description: White to tan, crystalline powder with a faint, characteristic odor. 

[insecticide] 

Measurement Methods 

(see Table 1): 

NIOSH 5601 

OSHA PV2007 

Chemical & Physical Properties: 

MW: 209.3 

BP: Decomposes 

Sol: 0.2% 

Fl.P: >300°F 

IP: ? 

Sp.Gr: ? 

VP: 0.000007 mmHg 

MLT: 187-197°F 

UEL: ? 

LEL: ? 

Class IIIB Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: Daily 

Remove: When wet or contam 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Strong oxidizers, alkalis 

[Note: Emits highly toxic methyl isocyanate fumes when heated to decomposition.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Miosis, blurred vision; sweat, salv; abdom cramps, nau, 

diarr, vomit; head, lass, musc twitch 

TO: CNS, liver, kidneys, GI tract, blood chol 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

n-Propyl acetate Formula: 

CH3COOCH2CH2CH3

CAS#: 

109-60-4 

RTECS#: 

AJ3675000 

IDLH: 

1700 ppm 

Conversion: 1 ppm = 4.18 mg/m3 DOT: 1276 129 

Synonyms/Trade Names: Propylacetate, n-Propyl ester of acetic acid 

Exposure Limits: 

NIOSH REL: TWA 200 ppm (840 mg/m3

) 

 ST 250 ppm (1050 mg/m3

) 

OSHA PEL†: TWA 200 ppm (840 mg/m3

) 

Physical Description: Colorless liquid with a mild, fruity odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1450 

OSHA 7 

Chemical & Physical 

Properties: 

MW: 102.2 

BP: 215°F 

Sol: 2% 

Fl.P: 55°F 

IP: 10.04 eV 

Sp.Gr: 0.84 

VP: 25 mmHg 

FRZ: -134°F 

UEL: 8% 

LEL(100°F): 1.7% 

Class IB Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

1700 ppm: Sa:Cf£/CcrFOv/GmFOv/ 

 PaprOv£/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Nitrates; strong oxidizers, alkalis & acids 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: In animals: irrit eyes, nose, throat; narco; derm 

TO: Eyes, skin, resp sys, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush prompt 

Breath: Resp support 

Swallow: Medical attention immed 
268

P 

n-Propyl alcohol Formula: 

CH3CH2CH2OH 

CAS#: 

71-23-8 

RTECS#: 

UH8225000 

IDLH: 

800 ppm 

Conversion: 1 ppm = 2.46 mg/m3 DOT: 1274 129 

Synonyms/Trade Names: Ethyl carbinol, 1-Propanol, n-Propanol, Propyl alcohol 

Exposure Limits: 

NIOSH REL: TWA 200 ppm (500 mg/m3

) [skin] 

 ST 250 ppm (625 mg/m3

) 

OSHA PEL†: TWA 200 ppm (500 mg/m3

) 

Physical Description: Colorless liquid with a mild, alcohol-like odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1401, 1405 

OSHA 7 

Chemical & Physical 

Properties: 

MW: 60.1 

BP: 207°F 

Sol: Miscible 

Fl.P: 72°F 

IP: 10.15 eV 

Sp.Gr: 0.81 

VP: 15 mmHg 

FRZ: -196°F 

UEL: 13.7% 

LEL: 2.2% 

Class IB Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

800 ppm: CcrOv*/PaprOv*/GmFOv/ 

 Sa*/ScbaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, nose, throat; dry cracking skin; drow, head; ataxia, 

GI pain; abdom cramps, nau, vomit, diarr; in animals: narco 

TO: Eyes, skin, resp sys, GI tract, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush 

Breath: Resp support 

Swallow: Medical attention immed 

Propylene dichloride Formula: 

CH3CHClCH2Cl 

CAS#: 

78-87-5 

RTECS#: 

TX9625000 

IDLH: 

Ca [400 ppm] 

Conversion: 1 ppm = 4.62 mg/m3 DOT: 1279 130 

Synonyms/Trade Names: Dichloro-1,2-propane; 1,2-Dichloropropane 

Exposure Limits: 

NIOSH REL: Ca 

 See Appendix A 

OSHA PEL†: TWA 75 ppm (350 mg/m3

) 

Physical Description: Colorless liquid with a chloroform-like odor. [pesticide] 

Measurement Methods 

(see Table 1): 

NIOSH 1013 

OSHA 7 

Chemical & Physical Properties: 

MW: 113.0 

BP: 206°F 

Sol: 0.3% 

Fl.P: 60°F 

IP: 10.87 eV 

Sp.Gr: 1.16 

VP: 40 mmHg 

FRZ: -149°F 

UEL: 14.5% 

LEL: 3.4% 

Class IB Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, strong acids, active metals 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, resp sys; drow, dizz; liver, kidney damage; in animals: 

CNS depres; [carc] 

TO: Eyes, skin, resp sys, liver, kidneys, CNS [in animals: liver & mammary 

gland tumors] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 
269

P 

Propylene glycol dinitrate Formula: 

CH3CNO2OHCHNO2OH 

CAS#: 

6423-43-4 

RTECS#: 

TY6300000 

IDLH: 

N.D. 

Conversion: 1 ppm = 6.79 mg/m3 DOT: 

Synonyms/Trade Names: PGDN; Propylene glycol-1,2-dinitrate; 1,2-Propylene glycol dinitrate 

Exposure Limits: 

NIOSH REL: TWA 0.05 ppm (0.3 mg/m3

) [skin] 

OSHA PEL†: none 

Physical Description: Colorless liquid with a disagreeable odor. 

[Note: A solid below 18°F.] 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical Properties: 

MW: 166.1 

BP: ? 

Sol: 0.1% 

Fl.P: ? 

IP: ? 

Sp.Gr(77°F): 1.23 

VP(72°F): 0.07 mmHg 

FRZ: 18°F 

UEL: ? 

LEL: ? 

Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Ammonia compounds, amines, oxidizers, reducing agents, combustible 

materials [Note: Similar to Ethylene glycol dinitrate in explosion potential.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes; conj; methemo; head, impaired balance, vis dist; in 

animals: liver, kidney damage 

TO: Eyes, CNS, blood, liver, kidneys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash 

Breath: Resp support 

Swallow: Medical attention immed 

Propylene glycol monomethyl ether Formula: 

CH3OCH2CHOHCH3

CAS#: 

107-98-2 

RTECS#: 

UB7700000 

IDLH: 

N.D. 

Conversion: 1 ppm = 3.69 mg/m3 DOT: 

Synonyms/Trade Names: Dowtherm® 209, 1-Methoxy-2-hydroxypropane, 1-Methoxy-2-propanol, 

2-Methoxy-1-methylethanol, Propylene glycol methyl ether 

Exposure Limits: 

NIOSH REL: TWA 100 ppm (360 mg/m3

) 

 ST 150 ppm (540 mg/m3

) 

OSHA PEL†: none 

Physical Description: Clear, colorless liquid with a mild, ethereal odor. 

Measurement Methods 

(see Table 1): 

NIOSH 2554 

OSHA 99 

Chemical & Physical Properties: 

MW: 90.1 

BP: 248°F 

Sol: Miscible 

Fl.P: 97°F 

IP: ? 

Sp.Gr: 0.96 

VP(77°F): 12 mmHg 

FRZ: -139°F (Sets to glass) 

UEL(calc): 13.8% 

LEL(calc.): 1.6% 

Class IC Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: Prevent eye contact 

Wash skin: N.R. 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Oxidizers, strong acids [Note: Hygroscopic (i.e., absorbs moisture from air). 

May slowly form reactive peroxides during prolonged storage.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, nose, throat; head, nau, dizz, drow, inco; 

vomit, diarr 

TO: Eyes, skin, resp sys, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water wash 

Breath: Resp support 

Swallow: Medical attention immed 
270

P 

Propylene imine Formula: 

C3H7N 

CAS#: 

75-55-8 

RTECS#: 

CM8050000 

IDLH: 

Ca [100 ppm] 

Conversion: 1 ppm = 2.34 mg/m3 DOT: 1921 131P (inhibited) 

Synonyms/Trade Names: 2-Methylaziridine, 2-Methylethyleneimine, Propyleneimine, Propylene imine (inhibited), 

Propylenimine 

Exposure Limits: 

NIOSH REL: Ca 

 TWA 2 ppm (5 mg/m3

) [skin] 

 See Appendix A 

OSHA PEL: TWA 2 ppm (5 mg/m3

) [skin] 

Physical Description: Colorless, oily liquid with an ammonia-like odor. 

Measurement Methods 

(see Table 1): 

None available 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFS/ScbaE 

Chemical & Physical Properties: 

MW: 57.1 

BP: 152°F 

Sol: Miscible 

Fl.P: 25°F 

IP: 9.00 eV 

Sp.Gr: 0.80 

VP: 112 mmHg 

FRZ: -85°F 

UEL: ? 

LEL: ? 

Class IB Flammable Liquid 

Incompatibilities and Reactivities: Acids, strong oxidizers, water, carbonyl 

compounds, quinones, sulfonyl halides 

[Note: Subject to violent polymerization in contact with acids. Hydrolyzes in 

water to form methylethanolamine.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Eye, skin burns; [carc] 

TO: Eyes, skin [in animals: nasal tumors] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

Propylene oxide Formula: 

C3H6O 

CAS#: 

75-56-9 

RTECS#: 

TZ2975000 

IDLH: 

Ca [400 ppm] 

Conversion: 1 ppm = 2.38 mg/m3 DOT: 1280 127P 

Synonyms/Trade Names: 1,2-Epoxy propane; Methyl ethylene oxide; Methyloxirane; Propene oxide; 

1,2-Propylene oxide 

Exposure Limits: 

NIOSH REL: Ca 

 See Appendix A 

OSHA PEL†: TWA 100 ppm (240 mg/m3

) 

Measurement Methods 

(see Table 1): 

NIOSH 1612 

OSHA 88 

Physical Description: Colorless liquid with a benzene-like odor. [Note: A gas above 94°F.] 

Chemical & Physical Properties: 

MW: 58.1 

BP: 94°F 

Sol: 41% 

Fl.P: -35°F 

IP: 9.81 eV 

Sp.Gr: 0.83 

VP: 445 mmHg 

FRZ: -170°F 

UEL: 36% 

LEL: 2.3% 

Class IA Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Provide: Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFS/ScbaE 

Incompatibilities and Reactivities: Anhydrous chlorides of iron, tin, and aluminum; peroxides of iron and 

aluminum; alkali metal hydroxides; iron; strong acids, caustics & peroxides [Note: Polymerization may occur due to 

high temperatures or contamination with alkalis, aqueous acids, amines & acidic alcohols.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, resp sys; skin blisters, burns; [carc] 

TO: Eyes, skin, resp sys [in animals: nasal tumors] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 
271

P 

n-Propyl nitrate Formula: 

CH3CH2CH2ONO2

CAS#: 

627-13-4 

RTECS#: 

UK0350000 

IDLH: 

500 ppm 

Conversion: 1 ppm = 4.30 mg/m3 DOT: 1865 131 

Synonyms/Trade Names: Propyl ester of nitric acid 

Exposure Limits: 

NIOSH REL: TWA 25 ppm (105 mg/m3

) 

 ST 40 ppm (170 mg/m3

) 

OSHA PEL†: TWA 25 ppm (110 mg/m3

) 

Physical Description: Colorless to straw-colored liquid with an ether-like odor. 

Measurement Methods 

(see Table 1): 

NIOSH S227 (II-3) 

OSHA 7 

Chemical & Physical Properties: 

MW: 105.1 

BP: 231°F 

Sol: Slight 

Fl.P: 68°F 

IP: 11.07 eV 

Sp.Gr: 1.07 

VP: 18 mmHg 

FRZ: -148°F 

UEL: 100% 

LEL: 2% 

Class IB Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

250 ppm: Sa 

500 ppm: Sa:Cf/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFS¿/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, combustible materials 

[Note: Forms explosive mixtures with combustible materials.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: In animals: irrit eyes, skin; methemo, anoxia, cyan; dysp, 

lass, dizz, head 

TO: Eyes, skin, blood 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 

Pyrethrum 

Formula: 

C20H28O3/C21H28O5/C21H30O3/ 

C22H30O5/C21H28O3/C22H28O5

CAS#: 

8003-34-7 

RTECS#: 

UR4200000 

IDLH: 

5000 mg/m3

Conversion: DOT: 

Synonyms/Trade Names: Cinerin I or II, Jasmolin I or II, Pyrethrin I or II, Pyrethrum I or II 

[Note: Pyrethrum is a variable mixture of Cinerin, Jasmolin, and Pyrethrin.] 

Exposure Limits: 

NIOSH REL: TWA 5 mg/m3

OSHA PEL: TWA 5 mg/m3

Physical Description: Brown, viscous oil or solid. [insecticide] 

Measurement Methods 

(see Table 1): 

NIOSH 5008 

OSHA 70 

Chemical & Physical 

Properties: 

MW: 316-374 

BP: ? 

Sol: Insoluble 

Fl.P: 180-190°F 

IP: ? 

Sp.Gr: 1 (approx) 

VP: Low 

MLT: ? 

UEL: ? 

LEL: ? 

Class IIIA Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

50 mg/m3

: CcrOv95*/Sa* 

125 mg/m3

: Sa:Cf*/PaprOvHie* 

250 mg/m3

: CcrFOv100/PaprTOvHie*/ 

 ScbaF/SaF 

5000 mg/m3

: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Erythema, derm, papules, pruritus, rhin; sneez; asthma 

TO: Resp sys, skin, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 
272

Q 

Pyridine Formula: 

C5H5N 

CAS#: 

110-86-1 

RTECS#: 

UR8400000 

IDLH: 

1000 ppm 

Conversion: 1 ppm = 3.24 mg/m3 DOT: 1282 129 

Synonyms/Trade Names: Azabenzene, Azine 

Exposure Limits: 

NIOSH REL: TWA 5 ppm (15 mg/m3

) 

OSHA PEL: TWA 5 ppm (15 mg/m3

) 

Physical Description: Colorless to yellow liquid with a nauseating, fish-like odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1613 

OSHA 7 

Chemical & Physical 

Properties: 

MW: 79.1 

BP: 240°F 

Sol: Miscible 

Fl.P: 68°F 

IP: 9.27 eV 

Sp.Gr: 0.98 

VP: 16 mmHg 

FRZ: -44°F 

UEL: 12.4% 

LEL: 1.8% 

Class IB Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

125 ppm: Sa:Cf£/PaprOv£ 

50 ppm: CcrFOv/GmFOv/PaprTOv£/ 

 ScbaF/SaF 

1000 ppm: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, strong acids 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes; head, anxi, dizz, insom; nau, anor; derm; liver, 

kidney damage 

TO: Eyes, skin, CNS, liver, kidneys, GI tract, 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

Quinone Formula: 

OC6H4O 

CAS#: 

106-51-4 

RTECS#: 

DK2625000 

IDLH: 

100 mg/m3

Conversion: 1 ppm = 4.42 mg/m3 DOT: 2587 153 

Synonyms/Trade Names: 1,4-Benzoquinone; p-Benzoquinone; 1,4-Cyclohexadiene dioxide; p-Quinone 

Exposure Limits: 

NIOSH REL: TWA 0.4 mg/m3

 (0.1 ppm) 

OSHA PEL: TWA 0.4 mg/m3

 (0.1 ppm) 

Physical Description: Pale-yellow solid with an acrid, chlorine-like odor. 

Measurement Methods 

(see Table 1): 

NIOSH S181 (II-4) 

Chemical & Physical 

Properties: 

MW: 108.1 

BP: Sublimes 

Sol: Slight 

Fl.P: 100-200°F 

IP: 9.68 eV 

Sp.Gr: 1.32 

VP(77°F): 0.1 mmHg 

MLT: 240°F 

UEL: ? 

LEL: ? 

Combustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

10 mg/m3

: Sa:Cf£ 

20 mg/m3

: ScbaF/SaF 

100 mg/m3

: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Eye irrit, conj; kera; skin irrit 

TO: Eyes, skin 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 
273

R 

Resorcinol Formula: 

C6H4(OH)2

CAS#: 

108-46-3 

RTECS#: 

VG9625000 

IDLH: 

N.D. 

Conversion: 1 ppm = 4.50 mg/m3 DOT: 2876 153 

Synonyms/Trade Names: 1,3-Benzenediol; m-Benzenediol; 1,3-Dihydroxybenzene; m-Dihydroxybenzene; 

3-Hydroxyphenol; m-Hydroxyphenol 

Exposure Limits: 

NIOSH REL: TWA 10 ppm (45 mg/m3

) 

 ST 20 ppm (90 mg/m3

) 

OSHA PEL†: none 

Physical Description: White needles, plates, crystals, flakes, or powder with a faint odor. 

[Note: Turns pink on exposure to air or light, or contact with iron.] 

Measurement 

Methods (see Table 1):

NIOSH 5701 

OSHA PV2053 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Chemical & Physical Properties: 

MW: 110.1 

BP: 531°F 

Sol: 110% 

Fl.P: 261°F 

IP: 8.63 eV 

Sp.Gr: 1.27 

VP(77°F): 0.0002 mmHg 

MLT: 228°F 

UEL: ? 

LEL(392°F): 1.4% 

Class IIIB Combustible Liquid, but 

may be difficult to ignite. 

Incompatibilities and Reactivities: Acetanilide, albumin, alkalis, 

antipyrine, camphor, ferric salts, menthol, spirit nitrous ether, strong 

oxidizers & bases 

[Note: Hygroscopic (i.e., absorbs moisture from the air).] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, nose, throat, upper resp sys; methemo; cyan, convuls; 

restless, bluish skin, incr heart rate, dysp; dizz, drow, hypothermia, hema; 

spleen, kidney, liver changes; derm 

TO: Eyes, skin, resp sys, CVS, CNS, blood, spleen, liver, kidneys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

Rhodium (metal fume and 

insoluble compounds, as Rh) 

Formula: 

Rh (metal) 

CAS#: 

7440-16-6 (metal) 

RTECS#: 

VI9069000

IDLH: 

100 mg/m3

 (as Rh) 

Conversion: DOT: 

Synonyms/Trade Names: Rhodium metal: Elemental rhodium 

Synonyms of other insoluble rhodium compounds vary depending upon the specific compound. 

Exposure Limits: 

NIOSH REL: TWA 0.1 mg/m3

OSHA PEL: TWA 0.1 mg/m3

Measurement Methods 

(see Table 1): 

NIOSH S188 (II-3) 

Physical Description: Metal: White, hard, ductile, malleable solid with a bluish-gray luster. 

Chemical & Physical Properties: 

MW: 102.9 

BP: 6741°F 

Sol: Insoluble 

Fl.P: NA 

IP: NA 

Sp.Gr: 12.41 (metal) 

VP: 0 mmHg (approx) 

MLT: 3571°F 

UEL: NA 

LEL: NA 

Metal: Noncombustible Solid in bulk 

form, but flammable as dust or powder. 

Personal Protection/Sanitation

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

0.5 mg/m3

: Qm 

1 mg/m3

: 95XQ/Sa 

2.5 mg/m3

: Sa:Cf/PaprHie 

5 mg/m3

: 100F/SaT:Cf/PaprTHie/ 

 ScbaF/SaF 

100 mg/m3

: Sa:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Incompatibilities and Reactivities: Chlorine trifluoride, oxygen difluoride 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh 

SY: Possible resp sens 

TO: Resp sys 

First Aid (see Table 6): 

Breath: Resp support 

Swallow: Medical attention immed 
274

R 

Rhodium (soluble compounds, as Rh) Formula: CAS#: RTECS#: IDLH: 

2 mg/m3

 (as Rh) 

Conversion: DOT: 

Synonyms/Trade Names: Synonyms vary depending upon the specific soluble rhodium compound. 

Exposure Limits: 

NIOSH REL: TWA 0.001 mg/m3

OSHA PEL: TWA 0.001 mg/m3

Physical Description: Appearance and odor vary depending upon the specific soluble 

rhodium compound. 

Measurement Methods 

(see Table 1): 

NIOSH S189 (II-3) 

Chemical & Physical 

Properties: 

Properties vary depending 

upon the specific soluble 

rhodium compound. 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

0.01 mg/m3

: 100XQ*/Sa* 

0.025 mg/m3

: Sa:Cf*/PaprHie* 

0.05 mg/m3

: 100F/PaprTHie*/ScbaF/SaF 

2 mg/m3

: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Incompatibilities and Reactivities: Varies 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: In animals: irrit eyes; CNS damage 

TO: Eyes, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush 

Breath: Resp support 

Swallow: Medical attention immed 

Ronnel Formula: 

(CH3O)2P(S)OC6H2Cl3

CAS#: 

299-84-3 

RTECS#: 

TG0525000 

IDLH: 

300 mg/m3

Conversion: DOT: 

Synonyms/Trade Names: O,O-Dimethyl O-(2,4,5-trichlorophenyl) phosphorothioate; Fenchlorophos 

Exposure Limits: 

NIOSH REL: TWA 10 mg/m3

OSHA PEL†: TWA 15 mg/m3

Physical Description: White to light-tan, crystalline solid. [insecticide] 

[Note: A liquid above 106°F.] 

Measurement Methods 

(see Table 1): 

NIOSH 5600 

OSHA PV2054 

Chemical & Physical 

Properties: 

MW: 321.6 

BP: Decomposes 

Sol(77°F): 0.004% 

Fl.P: NA 

IP: ? 

Sp.Gr(77°F): 1.49 

VP(77°F): 0.0008 mmHg 

MLT: 106°F 

UEL: NA 

LEL: NA 

Noncombustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

100 mg/m3

: CcrOv95/Sa 

250 mg/m3

: Sa:Cf/PaprOvHie 

300 mg/m3

: CcrFOv100/GmFOv100/ 

 PaprTOvHie*/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: In animals: irrit eyes; chol inhibition; liver, kidney damage 

TO: Eyes, liver, kidneys, blood plasma 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 
275

R 

Rosin core solder, pyrolysis 

products (as formaldehyde) 

Formula: CAS#: RTECS#: IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: Rosin flux pyrolysis products, Rosin core soldering flux pyrolysis products 

Exposure Limits: 

NIOSH REL*: TWA 0.1 mg/m3

 

 [*Note: ”Ca” in the presence of formaldehyde, acetaldehyde, or 

 malonaldehyde. See Appendices A & C (Aldehydes).] 

OSHA PEL†: none 

Measurement Methods 

(see Table 1): 

NIOSH 2541, 3500 

Physical Description: Pyrolysis products of rosin core solder include acetone, aliphatic aldehydes, methyl alcohol, 

methane, ethane, various abietic acids (the major components of rosin), CO & CO2. 

Chemical & Physical 

Properties: 

Properties vary depending 

upon the specific rosin core 

solder being used. 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

In the presence of Formaldeyde, 

Acetaldehyde, or Malonaldehyde: 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Incompatibilities and Reactivities: Varies 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh 

SY: Irrit eyes, nose, throat, upper resp sys [carc (in the presence of 

Formaldehyde, Acetaldehyde, or Malonaldehyde)] 

TO: Eyes, resp sys [nasal cancer; thyroid gland tumors in animals (in the 

presence of Formaldehyde, Acetaldehyde, or Malonaldehyde)] 

First Aid (see Table 6): 

Eye: Irr immed 

Breath: Resp support 

Rotenone Formula: 

C23H22O6

CAS#: 

83-79-4 

RTECS#: 

DJ2800000 

IDLH: 

2500 mg/m3

Conversion: DOT: 

Synonyms/Trade Names: 

1,2,12,12a-Tetrahydro-8,9-dimethoxy-2-(1-methylethenyl)-[1]benzopyrano[3,4-b]furo[2,3-h][1]benzopyran-6(6aH)-one 

Exposure Limits: 

NIOSH REL: TWA 5 mg/m3

OSHA PEL: TWA 5 mg/m3

Physical Description: Colorless to red, odorless, crystalline solid. [insecticide] 

Measurement Methods 

(see Table 1): 

NIOSH 5007 

Chemical & Physical 

Properties: 

MW: 394.4 

BP: Decomposes 

Sol: Insoluble 

Fl.P: ? 

IP: ? 

Sp.Gr: 1.27 

VP: <0.00004 mmHg 

MLT: 330°F 

UEL: ? 

LEL: ? 

Combustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

5 mg/m3

: CcrOv95/Sa 

125 mg/m3

: Sa:Cf/PaprOvHie 

250 mg/m3

: CcrFOv100/GmFOv100/ 

 PaprTOvHie/SaT:Cf/ 

 ScbaF/SaF 

2500 mg/m3

: Sa:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, alkalis 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, resp sys; numb muc memb; nau, vomit, 

abdom pain; musc tremor, inco, clonic convuls, stupor 

TO: Eyes, skin, resp sys, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 
276

S 

Rouge Formula: 

Fe2O3

CAS#: 

1309-37-1 

RTECS#: 

NO7400000 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: Iron(III)oxide, Iron oxide red, Red iron oxide, Red oxide 

Exposure Limits: 

NIOSH REL: See Appendix D 

OSHA PEL†: TWA 15 mg/m3

 (total) 

 TWA 5 mg/m3

 (resp) 

Physical Description: A fine, red powder of ferric oxide. 

[Note: Usually used in cake form or impregnated in paper or cloth.] 

Measurement Methods 

(see Table 1): 

NIOSH 0500, 0600 

Chemical & Physical Properties: 

MW: 159.7 

BP: ? 

Sol: Insoluble 

Fl.P: NA 

IP: NA 

Sp.Gr: 5.24 

VP: 0 mmHg (approx) 

MLT: 2849°F 

UEL: NA 

LEL: NA 

Noncombustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Calcium hypochlorite, carbon monoxide, hydrogen peroxide 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con 

SY: Irrit eyes, skin, resp sys 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Breath: Fresh air 

Selenium Formula: 

Se 

CAS#: 

7782-49-2 

RTECS#: 

VS7700000 

IDLH: 

1 mg/m3

 (as Se) 

Conversion: DOT: 2658 152 (powder) 

Synonyms/Trade Names: Elemental selenium, Selenium alloy 

Exposure Limits: 

NIOSH REL*: TWA 0.2 mg/m3

 

OSHA PEL*: TWA 0.2 mg/m3

 

[*Note: The REL and PEL also apply to other selenium 

compounds (as Se) except Selenium hexafluoride.] 

Physical Description: Amorphous or crystalline, red to gray solid. 

[Note: Occurs as an impurity in most sulfide ores.] 

Measurement Methods 

(see Table 1): 

NIOSH 7300, 7301, 7303, 

 9102, S190 (II-7) 

OSHA ID121 

Chemical & Physical 

Properties: 

MW: 79.0 

BP: 1265°F 

Sol: Insoluble 

Fl.P: NA 

IP: NA 

Sp.Gr: 4.28 

VP: 0 mmHg (approx) 

MLT: 392°F 

UEL: NA 

LEL: NA 

Combustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: N.R. 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

1 mg/m3

: Qm*/95XQ*/100F/PaprHie*/ 

 PaprHie*/Sa*/ScbaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Incompatibilities and Reactivities: Acids, strong oxidizers, chromium trioxide, potassium bromate, cadmium 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, nose, throat; vis dist; head; chills, fever; dysp, bron; 

metallic taste, garlic breath, GI dist; derm; eye, skin burns; in animals: 

anemia; liver nec, cirr; kidney, spleen damage 

TO: Eyes, skin, resp sys, liver, kidneys, blood, spleen 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 
277

S 

Selenium hexafluoride Formula: 

SeF6

CAS#: 

7783-79-1 

RTECS#: 

VS9450000 

IDLH: 

2 ppm 

Conversion: 1 ppm = 7.89 mg/m3 DOT: 2194 125 

Synonyms/Trade Names: Selenium fluoride 

Exposure Limits: 

NIOSH REL: TWA 0.05 ppm 

OSHA PEL: TWA 0.05 ppm (0.4 mg/m3

) 

Physical Description: Colorless gas. 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical 

Properties: 

MW: 193.0 

BP: -30°F 

Sol: Insoluble 

Fl.P: NA 

IP: ? 

RGasD: 6.66 

VP: >1 atm 

FRZ: -59°F 

UEL: NA 

LEL: NA 

Nonflammable Gas 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

0.5 ppm: Sa 

1.25 ppm: Sa:Cf 

2 ppm: SaT:Cf/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFS/ScbaE 

Incompatibilities and Reactivities: Water [Note: Hydrolyzes very slowly in cold water.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh 

SY: In animals: pulm irrit, edema 

TO: Resp sys 

First Aid (see Table 6): 

Breath: Resp support 

Silica, amorphous Formula: 

SiO2

CAS#: 

7631-86-9 

RTECS#: 

VV7310000 

IDLH: 

3000 mg/m3

Conversion: DOT: 

Synonyms/Trade Names: Diatomaceous earth, Diatomaceous silica, Diatomite, Precipitated amorphous silica, 

Silica gel, Silicon dioxide (amorphous) 

Exposure Limits: 

NIOSH REL: TWA 6 mg/m3

OSHA PEL†: TWA 20 mppcf [(80 mg/m3)/%SiO2] 

Physical Description: Transparent to gray, odorless powder. 

[Note: Amorphous silica is the non-crystalline form of SiO2.] 

Measurement Methods 

(see Table 1): 

NIOSH 7501 

Chemical & Physical 

Properties: 

MW: 60.1 

BP: 4046°F 

Sol: Insoluble 

Fl.P: NA 

IP: NA 

Sp.Gr: 2.20 

VP: 0 mmHg (approx) 

MLT: 3110°F 

UEL: NA 

LEL: NA 

Noncombustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

30 mg/m3

: Qm 

60 mg/m3

: 95XQ/Sa 

150 mg/m3

: Sa:Cf/PaprHie 

300 mg/m3

: 100F/SaT:Cf/PaprTHie/ 

 ScbaF/SaF 

3000 mg/m3

: Sa:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Incompatibilities and Reactivities: Fluorine, oxygen difluoride, chlorine trifluoride 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con 

SY: Irrit eyes, pneumoconiosis 

TO: Eyes, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Breath: Fresh air 
278

S 

Silica, crystalline 

(as respirable dust)

Formula: 

SiO2

CAS#: 

14808-60-7 

RTECS#: 

VV7330000 

IDLH: Ca 

[25 mg/m3

 (cristobalite, tridymite); 

50 mg/m3

 (quartz, tripoli)] 

Conversion: DOT: 

Synonyms/Trade Names: Cristobalite, Quartz, Tridymite, Tripoli 

Exposure Limits: 

NIOSH REL: Ca 

 TWA 0.05 mg/m3

 

 See Appendix A 

OSHA PEL†: See Appendix C (Mineral Dusts) 

Measurement Methods 

(see Table 1): 

NIOSH 7500, 7601, 7602 

OSHA ID142 

Physical Description: Colorless, odorless solid. [Note: A component of many mineral dusts.] 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

0.5 mg/m3

: 95XQ 

1.25 mg/m3

: PaprHie/Sa:Cf 

2.5 mg/m3

: 100F/PaprTHie 

25 mg/m3

: Sa:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Chemical & Physical Properties: 

MW: 60.1 

BP: 4046°F 

Sol: Insoluble 

Fl.P: NA 

IP: NA 

Sp.Gr: 2.66 

VP: 0 mmHg (approx) 

MLT: 3110°F 

UEL: NA 

LEL: NA 

Noncombustible Solid 

Incompatibilities and Reactivities: Powerful oxidizers: fluorine, chlorine 

trifluoride, manganese trioxide, oxygen difluoride, hydrogen peroxide, etc.; 

acetylene; ammonia 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con 

SY: Cough, dysp, wheez; decr pulm func, progressive resp 

symptoms (silicosis); irrit eyes; [carc] 

TO: Eyes, resp sys [in animals: lung cancer] 

First Aid (see Table 6): 

Eye: Irr immed 

Breath: Fresh air 

Silicon Formula: 

Si 

CAS#: 

7440-21-3 

RTECS#: 

VW0400000 

IDLH: 

N.D. 

Conversion: DOT: 1346 170 (amorphous powder) 

Synonyms/Trade Names: Elemental silicon 

[Note: Does not occur free in nature, but is found in silicon dioxide (silica) & in various silicates.] 

Exposure Limits: 

NIOSH REL: TWA 10 mg/m3

 (total) 

 TWA 5 mg/m3

 (resp) 

OSHA PEL†: TWA 15 mg/m3

 (total) 

 TWA 5 mg/m3

 (resp) 

Physical Description: Black to gray, lustrous, needle-like crystals. 

[Note: The amorphous form is a dark-brown powder.] 

Measurement Methods 

(see Table 1): 

NIOSH 0500, 0600 

Chemical & Physical Properties: 

MW: 28.1 

BP: 4271°F 

Sol: Insoluble 

Fl.P: NA 

IP: NA 

Sp.Gr(77°F): 2.33 

VP: 0 mmHg (approx) 

MLT: 2570°F 

UEL: NA 

LEL: NA 

MEC: 160 g/m3

Combustible Solid in powder form. 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: Prevent eye contact 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Chlorine, fluorine, oxidizers, calcium, cesium carbide, alkaline carbonates 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, upper resp sys; cough 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Breath: Fresh air 

Swallow: Medical attention immed 
279

S 

Silicon carbide Formula: 

SiC 

CAS#: 

409-21-2 

RTECS#: 

VW0450000 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: Carbon silicide, Carborundum®, Silicon monocarbide 

Exposure Limits: 

NIOSH REL: TWA 10 mg/m3

 (total) 

 TWA 5 mg/m3

 (resp) 

OSHA PEL†: TWA 15 mg/m3

 (total) 

 TWA 5 mg/m3

 (resp) 

Physical Description: Yellow to green to bluish-black, iridescent crystals. 

Measurement Methods 

(see Table 1): 

NIOSH 0500, 0600 

Chemical & Physical Properties: 

MW: 40.1 

BP: Sublimes 

Sol: Insoluble 

Fl.P: NA 

IP: 9.30 eV 

Sp.Gr: 3.23 

VP: 0 mmHg (approx) 

MLT: 4892°F (Sublimes) 

UEL: NA 

LEL: NA 

Noncombustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: None reported [Note: Sublimes with decomposition at 4892°F.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, upper resp sys; cough 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Breath: Fresh air 

Swallow: Medical attention immed 

Silicon tetrahydride Formula: 

SiH4

CAS#: 

7803-62-5 

RTECS#: 

VV1400000 

IDLH: 

N.D. 

Conversion: 1 ppm = 1.31 mg/m3 DOT: 2203 116 

Synonyms/Trade Names: Monosilane, Silane, Silicane 

Exposure Limits: 

NIOSH REL: TWA 5 ppm (7 mg/m3

) 

OSHA PEL†: none 

Physical Description: Colorless gas with a repulsive odor. 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical Properties: 

MW: 32.1 

BP: -169°F 

Sol: Decomposes 

Fl.P: NA (Gas) 

IP: ? 

RGasD: 1.11 

VP: >1 atm 

FRZ: -301°F 

UEL: ? 

LEL: ? 

Flammable Gas (may ignite 

SPONTANEOUSLY in air). 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Halogens (bromine, chlorine, carbonyl chloride, antimony pentachloride, 

tin(IV) chloride), water 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh 

SY: Irrit eyes, skin, muc memb; nau, head 

TO: Eyes, skin, resp sys, CNS 

First Aid (see Table 6): 

Breath: Resp support 
280

S 

Silver (metal dust and soluble 

compounds, as Ag) 

Formula: 

Ag (metal) 

CAS#: 

7440-22-4 

(metal) 

RTECS#: 

VW3500000 

(metal) 

IDLH: 

10 mg/m3

 (as Ag)

Conversion: DOT: 

Synonyms/Trade Names: Silver metal: Argentum 

Synonyms of soluble silver compounds such as Silver nitrate (AgNO3) vary depending upon the specific compound. 

Exposure Limits: 

NIOSH REL: TWA 0.01 mg/m3

OSHA PEL: TWA 0.01 mg/m3

Physical Description: Metal: White, lustrous solid. 

Measurement Methods 

(see Table 1): 

NIOSH 7300, 7301, 9102 

OSHA ID121 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam (AgNO3) 

Change: Daily 

Provide: Eyewash 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

0.25 mg/m3

: Sa:Cf£/PaprHie£ 

0.5 mg/m3

: 100F/ScbaF/SaF 

10 mg/m3

: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Chemical & Physical 

Properties: 

MW: 107.9 

BP: 3632°F 

Sol: Insoluble 

Fl.P: NA 

IP: NA 

Sp.Gr: 10.49 (metal) 

VP: 0 mmHg (approx) 

MLT: 1761°F 

UEL: NA 

LEL: NA 

Metal: Noncombustible Solid, but 

flammable in form of dust or 

powder. 

Incompatibilities and Reactivities: Acetylene, ammonia, hydrogen peroxide, 

bromoazide, chlorine trifluoride, ethyleneimine, oxalic acid, tartaric acid 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Blue-gray eyes, nasal septum, throat, skin; irrit, ulceration skin; 

GI dist 

TO: Nasal septum, skin, eyes 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush 

Breath: Resp support 

Swallow: Medical attention immed 

Soapstone (containing less 

than 1% quartz) 

Formula: 

3MgO-4SiO2-H2O 

CAS#: RTECS#: 

VV8780000 

IDLH: 

3000 mg/m3

Conversion: DOT: 

Synonyms/Trade Names: Massive talc, Soapstone silicate, Steatite 

Exposure Limits: 

NIOSH REL: TWA 6 mg/m3

 (total) 

 TWA 3 mg/m3

 (resp) 

OSHA PEL†: TWA 20 mppcf 

Physical Description: Odorless, white-gray powder. 

Measurement Methods 

(see Table 1): 

NIOSH 0500 

Chemical & Physical 

Properties: 

MW: 379.3 

BP: ? 

Sol: Insoluble 

Fl.P: NA 

IP: NA 

Sp.Gr: 2.7-2.8 

VP: 0 mmHg (approx) 

MLT: ? 

UEL: NA 

LEL: NA 

Noncombustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

30 mg/m3

: Qm 

60 mg/m3

: 95XQ/Sa 

150 mg/m3

: PaprHie 

300 mg/m3

: 100F/SaT:Cf*/PaprTHie*/ 

 ScbaF/SaF 

3000 mg/m3

: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Incompatibilities and Reactivities: None reported 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con 

SY: Pneumoconiosis: cough, dysp; digital clubbing; cyan; basal 

crackles, cor pulmonale 

TO: Resp sys, CVS 

First Aid (see Table 6): 

Eye: Irr immed 

Breath: Resp support 
281

S 

Sodium aluminum fluoride (as F) Formula: 

Na3AlF6

CAS#: 

15096-52-3 

RTECS#: 

WA9625000 

IDLH: 

250 mg/m3

 (as F) 

Conversion: DOT: 

Synonyms/Trade Names: Cryocide, Cryodust, Cryolite, Sodium hexafluoroaluminate 

Exposure Limits: 

NIOSH REL*: TWA 2.5 mg/m3

 

OSHA PEL*: TWA 2.5 mg/m3

 

[*Note: The REL and PEL also apply to other inorganic, solid fluorides (as F).] 

Physical Description: Colorless to dark odorless solid. [pesticide] 

[Note: Loses color on heating.] 

Measurement Methods 

(see Table 1): 

NIOSH 7902 

OSHA ID110 

Chemical & Physical 

Properties: 

MW: 209.9 

BP: Decomposes 

Sol: 0.04% 

Fl.P: NA 

IP: NA 

Sp.Gr: 2.90 

VP: 0 mmHg (approx) 

MLT: 1832°F 

UEL: NA 

LEL: NA 

Noncombustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

12.5 mg/m3

: Qm 

25 mg/m3

: 95XQ*/Sa* 

62.5 mg/m3

: Sa:Cf*/PaprHie*+

125 mg/m3

: 100F+/ScbaF/SaF 

250 mg/m3

: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F+/ScbaE 

+Note: May need acid gas sorbent 

Incompatibilities and Reactivities: Strong oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, resp sys; nau, abdom pain, diarr; salv, thirst, 

sweat; stiff spine; derm; calcification of ligaments of ribs, pelvis 

TO: Eyes, skin, resp sys, CNS, skeleton, kidneys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Fresh air 

Swallow: Medical attention immed 

Sodium azide Formula: 

NaN3

CAS#: 

26628-22-8 

RTECS#: 

VY8050000 

IDLH: 

N.D. 

Conversion: DOT: 1687 153 

Synonyms/Trade Names: Azide, Azium, Sodium salt of hydrazoic acid 

Exposure Limits: 

NIOSH REL: C 0.1 ppm (as HN3) [skin] 

 C 0.3 mg/m3

 (as NaN3) [skin] 

OSHA PEL†: none 

Physical Description: Colorless to white, odorless, crystalline solid. [pesticide] 

[Note: Forms hydrazoic acid (HN3) in water.] 

Measurement Methods 

(see Table 1): 

OSHA ID121, ID211 

Chemical & Physical Properties: 

MW: 65.0 

BP: Decomposes 

Sol(63°F): 42% 

Fl.P: ? 

IP: 11.70 eV 

Sp.Gr: 1.85 

VP: ? 

MLT: 527°F (Decomposes) 

UEL: ? 

LEL: ? 

Combustible Solid (if heated above 572°F). 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Acids, metals, water 

[Note: Over a period of time, sodium azide may react with copper, lead, brass, or solder in plumbing systems to 

form an accumulation of the HIGHLY EXPLOSIVE compounds of lead azide & copper azide.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin; head, dizz, lass, blurred vision; low BP, 

bradycardia; kidney changes 

TO: Eyes, skin, CNS, CVS, kidneys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 
282

S 

Sodium bisulfite Formula: 

NaHSO3

CAS#: 

7631-90-5 

RTECS#: 

VZ2000000 

IDLH: 

N.D. 

Conversion: DOT: 2693 154 (solution) 

Synonyms/Trade Names: Monosodium salt of sulfurous acid, Sodium acid bisulfite, Sodium bisulphite, 

Sodium hydrogen sulfite 

Exposure Limits: 

NIOSH REL: TWA 5 mg/m3

OSHA PEL†: none 

Physical Description: White crystals or powder with a slight odor of sulfur dioxide. 

Measurement Methods 

(see Table 1): 

NIOSH 0500 

Chemical & Physical Properties: 

MW: 104.1 

BP: Decomposes 

Sol: 29% 

Fl.P: NA 

IP: NA 

Sp.Gr: 1.48 

VP: ? 

MLT: Decomposes 

UEL: NA 

LEL: NA 

Noncombustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Heat (decomposes) [Note: Slowly oxidized to the sulfate on exposure to air.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, muc memb 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Breath: Fresh air 

Swallow: Medical attention immed 

Sodium cyanide (as CN) Formula: 

NaCN 

CAS#: 

143-33-9 

RTECS#: 

VZ7525000 

IDLH: 

25 mg/m3

 (as CN)

Conversion: DOT: 1689 157 (solid); 3414 157 (solution) 

Synonyms/Trade Names: Sodium salt of hydrocyanic acid 

Exposure Limits: 

NIOSH REL*: C 5 mg/m3

 (4.7 ppm) [10-minute] 

OSHA PEL*: TWA 5 mg/m3

 

[*Note: The REL and PEL also apply to other cyanides (as CN) except 

Hydrogen cyanide.] 

Measurement Methods 

(see Table 1): 

NIOSH 6010, 7904 

Physical Description: White, granular or crystalline solid with a faint, almond-like odor. 

Chemical & Physical Properties: 

MW: 49.0 

BP: 2725°F 

Sol(77°F): 58% 

Fl.P: NA 

IP: NA 

Sp.Gr: 1.60 

VP: 0 mmHg (approx) 

MLT: 1047°F 

UEL: NA 

LEL: NA 

Noncombustible Solid, but contact 

with acids releases highly flammable 

hydrogen cyanide. 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

25 mg/m3

: Sa/ScbaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFS100/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers (such as acids, acid salts, chlorates & nitrates) 

[Note: Absorbs moisture from the air forming a syrup.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin; asphy; lass, head, conf; nau, vomit; incr resp 

rate; slow gasping respiration; thyroid, blood changes 

TO: Eyes, skin, CVS, CNS, thyroid, blood 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 
283

S 

Sodium fluoride (as F) Formula: 

NaF 

CAS#: 

7681-49-4 

RTECS#: 

WB0350000 

IDLH: 

250 mg/m3

 (as F) 

Conversion: DOT: 1690 154 

Synonyms/Trade Names: Floridine, Sodium monofluoride 

Exposure Limits: 

NIOSH REL*: TWA 2.5 mg/m3

 

OSHA PEL*: TWA 2.5 mg/m3

 

[*Note: The REL and PEL also apply to other inorganic, solid fluorides (as F).] 

Physical Description: Odorless, white powder or colorless crystals. 

[Note: Pesticide grade is often dyed blue.] 

Measurement Methods 

(see Table 1): 

NIOSH 7902, 7906 

OSHA ID110 

Chemical & Physical Properties: 

MW: 42.0 

BP: 3099°F 

Sol: 4% 

Fl.P: NA 

IP: NA 

Sp.Gr: 2.78 

VP: 0 mmHg (approx) 

MLT: 1819°F 

UEL: NA 

LEL: NA 

Noncombustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

12.5 mg/m3

: Qm 

25 mg/m3

: 95XQ*/Sa* 

62.5 mg/m3

: Sa:Cf*/PaprHie*+

125 mg/m3

: 100F+/ScbaF/SaF 

250 mg/m3

: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F+/ScbaE 

+Note: May need acid gas sorbent 

Incompatibilities and Reactivities: Strong oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, resp sys; nau, abdom pain, diarr; salv, thirst, 

sweat; stiff spine; derm; calcification of ligaments of ribs, pelvis 

TO: Eyes, skin, resp sys, CNS, skeleton, kidneys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Fresh air 

Swallow: Medical attention immed 

Sodium fluoroacetate Formula: 

FCH2COONa 

CAS#: 

62-74-8 

RTECS#: 

AH9100000 

IDLH: 

2.5 mg/m3

Conversion: DOT: 2629 151 

Synonyms/Trade Names: SFA, Sodium monofluoroacetate 

Exposure Limits: 

NIOSH REL: TWA 0.05 mg/m3

 

 ST 0.15 mg/m3

 [skin] 

OSHA PEL†: TWA 0.05 mg/m3

 [skin] 

Physical Description: Fluffy, colorless to white (sometimes dyed black), odorless 

powder. [Note: A liquid above 95°F.] [rodenticide] 

Measurement Methods 

(see Table 1): 

NIOSH S301 (II-5) 

Chemical & Physical Properties: 

MW: 100.0 

BP: Decomposes 

Sol: Miscible 

Fl.P: NA 

IP: ? 

Sp.Gr: ? 

VP: Low 

MLT: 392°F 

UEL: NA 

LEL: NA 

Noncombustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Provide: Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

0.25 mg/m3

: Qm 

0.5 mg/m3

: 95XQ/Sa 

1.25 mg/m3

: Sa:Cf/PaprHie 

2.5 mg/m3

: 100F/SaT:Cf/PaprTHie/ 

 ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Incompatibilities and Reactivities: None reported 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Vomit; anxi, auditory halu; facial pares; twitch face musc; pulsus 

altenans, ectopic heartbeat, tacar, card arrhy; pulm edema; nystagmus; 

convuls; liver, kidney damage 

TO: Resp sys, CVS, liver, kidneys, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 
284

S 

Sodium hydroxide Formula: 

NaOH 

CAS#: 

1310-73-2 

RTECS#: 

WB4900000 

IDLH: 

10 mg/m3

Conversion: DOT: 1823 154 (dry, solid); 1824 154 (solution) 

Synonyms/Trade Names: Caustic soda, Lye, Soda lye, Sodium hydrate 

Exposure Limits: 

NIOSH REL: C 2 mg/m3

OSHA PEL†: TWA 2 mg/m3

Physical Description: Colorless to white, odorless solid (flakes, beads, granular 

form). 

Measurement Methods 

(see Table 1): 

NIOSH 7401 

Chemical & Physical Properties: 

MW: 40.0 

BP: 2534°F 

Sol: 111% 

Fl.P: NA 

IP: NA 

Sp.Gr: 2.13 

VP: 0 mmHg (approx) 

MLT: 605°F 

UEL: NA 

LEL: NA 

Noncombustible Solid, but when in 

contact with water may generate 

sufficient heat to ignite combustible 

materials. 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

10 mg/m3

: Sa:Cf£/100F/PaprHie£/ 

 ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Incompatibilities and Reactivities: Water; acids; flammable liquids; organic halogens; metals such as aluminum, 

tin & zinc; nitromethane [Note: Corrosive to metals.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, muc memb; pneu; eye, skin burns; temporary 

loss of hair 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

Sodium metabisulfite Formula: 

Na2S2O5

CAS#: 

7681-57-4 

RTECS#: 

UX8225000 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: Disodium pyrosulfite, Sodium metabisulphite, Sodium pyrosulfite 

Exposure Limits: 

NIOSH REL: TWA 5 mg/m3

OSHA PEL†: none 

Measurement Methods 

(see Table 1): 

NIOSH 0500 

Physical Description: White to yellowish crystals or powder with an odor of sulfur dioxide. 

Chemical & Physical Properties: 

MW: 190.1 

BP: Decomposes 

Sol: 54% 

Fl.P: NA 

IP: NA 

Sp.Gr: 1.4 

VP: ? 

MLT: >302°F (Decomposes) 

UEL: NA 

LEL: NA 

Noncombustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Heat (decomposes) 

[Note: Slowly oxidized to the sulfate on exposure to air & moisture.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, muc memb 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Breath: Fresh air 

Swallow: Medical attention immed 
285

S 

Starch Formula: 

(C6H10O5)n 

CAS#: 

9005-25-8 

RTECS#: 

GM5090000 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: Corn starch, Rice starch, Sorghum gum, α-Starch, Starch gum, Tapioca starch 

Exposure Limits: 

NIOSH REL: TWA 10 mg/m3

 (total) 

 TWA 5 mg/m3

 (resp) 

OSHA PEL: TWA 15 mg/m3

 (total) 

 TWA 5 mg/m3

 (resp) 

Physical Description: Fine, white, odorless powder. 

[Note: A carbohydrate polymer composed of 25% amylose & 75% amylpectin.] 

Measurement Methods 

(see Table 1): 

NIOSH 0500, 0600 

Chemical & Physical Properties: 

MW: varies 

BP: Decomposes 

Sol: Insoluble 

Fl.P: NA 

IP: NA 

Sp.Gr: 1.45 

VP: 0 mmHg (approx) 

MLT: Decomposes 

UEL: NA 

LEL: NA 

MEC: 50 g/m3

Noncombustible Solid, but may form 

explosive mixture with air. 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: Daily 

Remove: When wet or contam 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Oxidizers, acids, iodine, alkalis 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, muc memb; cough, chest pain; derm; rhin 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash 

Breath: Fresh air 

Swallow: Medical attention immed 

Stibine Formula: 

SbH3

CAS#: 

7803-52-3 

RTECS#: 

WJ0700000 

IDLH: 

5 ppm 

Conversion: 1 ppm = 5.10 mg/m3 DOT: 2676 119 

Synonyms/Trade Names: Antimony hydride, Antimony trihydride, Hydrogen antimonide 

Exposure Limits: 

NIOSH REL: TWA 0.1 ppm (0.5 mg/m3

) 

OSHA PEL: TWA 0.1 ppm (0.5 mg/m3

) 

Physical Description: Colorless gas with a disagreeable odor like hydrogen sulfide. 

Measurement Methods 

(see Table 1): 

NIOSH 6008 

Chemical & Physical Properties: 

MW: 124.8 

BP: -1°F 

Sol: Slight 

Fl.P: NA (Gas) 

IP: 9.51 eV 

RGasD: 4.31 

VP: >1 atm 

FRZ: -126°F 

UEL: ? 

LEL: ? 

Flammable Gas 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

1 ppm: Sa 

2.5 ppm: Sa:Cf 

5 ppm: SaT:Cf/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFS/ScbaE 

Incompatibilities and Reactivities: Acids, halogenated hydrocarbons, oxidizers, moisture, chlorine, ozone, 

ammonia 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh 

SY: Head, lass; nau, abdom pain; lumbar pain, hema, hemolytic anemia; 

jaun; pulm irrit 

TO: Blood, liver, kidneys, resp sys 

First Aid (see Table 6): 

Breath: Resp support 
286

S 

Stoddard solvent Formula: CAS#: 

8052-41-3 

RTECS#: 

WJ8925000 

IDLH: 

20,000 mg/m3

Conversion: DOT: 1268 128 (petroleum distillates, n.o.s.) 

Synonyms/Trade Names: Dry cleaning safety solvent, Mineral spirits, Petroleum solvent, Spotting naphtha 

[Note: A refined petroleum solvent with a flash point of 102-110°F, boiling point of 309-396°F, and 

containing >65% C10 or higher hydrocarbons.] 

Exposure Limits: 

NIOSH REL: TWA 350 mg/m3

 

 C 1800 mg/m3

 [15-minute] 

OSHA PEL†: TWA 500 ppm (2900 mg/m3

) 

Physical Description: Colorless liquid with a kerosene-like odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1550 

Chemical & Physical 

Properties: 

MW: Varies 

BP: 309-396°F 

Sol: Insoluble 

Fl.P: 102-110°F 

IP: ? 

Sp.Gr: 0.78 

VP: ? 

FRZ: ? 

UEL: ? 

LEL: ? 

Class II Combustible Liquid 

Personal Protection/Sanitation

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

3500 mg/m3

: CcrOv*/Sa* 

8750 mg/m3

: Sa:Cf*/PaprOv* 

17,500 mg/m3

: CcrFOv/GmFOv/PaprTOv*/ 

 ScbaF/SaF 

20,000 mg/m3

: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, nose, throat; dizz; derm; chemical pneu (aspir 

liquid); in animals: kidney damage 

TO: Eyes, skin, resp sys, CNS, kidneys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 

Strychnine Formula: 

C21H22N2O2

CAS#: 

57-24-9 

RTECS#: 

WL2275000 

IDLH: 

3 mg/m3

Conversion: DOT: 1692 151 

Synonyms/Trade Names: Nux vomica, Strynchnos 

Exposure Limits: 

NIOSH REL: TWA 0.15 mg/m3

OSHA PEL: TWA 0.15 mg/m3

Physical Description: Colorless to white, odorless, crystalline solid. [pesticide] 

Measurement Methods 

(see Table 1): 

NIOSH 5016 

Chemical & Physical Properties: 

MW: 334.4 

BP: Decomposes 

Sol: 0.02% 

Fl.P: ? 

IP: ? 

Sp.Gr: 1.36 

VP: Low 

MLT: 514°F 

UEL: ? 

LEL: ? 

Combustible Solid, but difficult to ignite. 

Personal Protection/Sanitation

(see Table 2): 

Skin: Prevent skin contact 

Eyes: N.R. 

Wash skin: When contam 

Remove: N.R. 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

0.75 mg/m3

: Qm 

1.5 mg/m3

: 95XQ/Sa 

3 mg/m3

: Sa:Cf/PaprHie/100F/ 

 ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Stiff neck, facial musc; restless, anxi, incr acuity of perception; incr 

reflex excitability; cyan; tetanic convuls with opisthotonos 

TO: CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 
287

S 

Styrene Formula: 

C6H5CH=CH2

CAS#: 

100-42-5 

RTECS#: 

WL3675000 

IDLH: 

700 ppm 

Conversion: 1 ppm = 4.26 mg/m3 DOT: 2055 128P (inhibited) 

Synonyms/Trade Names: Ethenyl benzene, Phenylethylene, Styrene monomer, Styrol, Vinyl benzene 

Exposure Limits: 

NIOSH REL: TWA 50 ppm (215 mg/m3

) 

 ST 100 ppm (425 mg/m3

) 

OSHA PEL†: TWA 100 ppm 

 C 200 ppm 

 600 ppm (5-minute maximum peak in any 3 hours) 

Physical Description: Colorless to yellow, oily liquid with a sweet, floral odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1501, 3800 

OSHA 9, 89 

Chemical & Physical Properties: 

MW: 104.2 

BP: 293°F 

Sol: 0.03% 

Fl.P: 88°F 

IP: 8.40 eV 

Sp.Gr: 0.91 

VP: 5 mmHg 

FRZ: -23°F 

UEL: 6.8% 

LEL: 0.9% 

Class IC Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

500 ppm: CcrOv*/Sa* 

700 ppm: Sa:Cf*/CcrFOv/GmFOv/ 

 PaprOv*/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Oxidizers, catalysts for vinyl polymers, peroxides, strong acids, 

aluminum chloride [Note: May polymerize if contaminated or subjected to heat. Usually contains an inhibitor 

such as tert-butylcatechol.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, nose, resp sys; head, lass, dizz, conf, mal, drow, unsteady 

gait; narco; defatting derm; possible liver inj; repro effects 

TO: Eyes, skin, resp sys, CNS, liver, repro sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush 

Breath: Resp support 

Swallow: Medical attention immed 

Subtilisins Formula: CAS#: 

1395-21-7 (BPN) 

9014-01-1 (Carlsburg) 

RTECS#: 

CO9450000 (BPN) 

CO9550000 (Carlsburg) 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: Bacillus subtilis, Bacillus subtilis BPN, Bacillus subtilis Carlsburg, Proteolytic enzymes, 

Subtilisin BPN, Subtilisin Carlsburg [Note: Commercial proteolytic enzymes are used in laundry detergents.] 

Exposure Limits: 

NIOSH REL: ST 0.00006 mg/m3

 [60-minute] 

OSHA PEL†: none 

Physical Description: Light-colored, free-flowing powders. 

[Note: A protein containing numerous amino acids.] 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical Properties: 

MW: 28,000 (approx) 

BP: ? 

Sol: ? 

Fl.P: NA 

IP: NA 

Sp.Gr: ? 

VP: 0 mmHg (approx) 

MLT: ? 

UEL: NA 

LEL: NA 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: None reported 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, resp sys; resp sens (enzyme asthma): sweat, head, 

chest pain, flu-like symptoms, cough, breathlessness, wheez 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash 

Breath: Resp support 

Swallow: Medical attention immed 
288

S 

Succinonitrile Formula: 

NCCH2CH2CN 

CAS#: 

110-61-2 

RTECS#: 

WN3850000 

IDLH: 

N.D. 

Conversion: 1 ppm = 3.28 mg/m3 DOT: 

Synonyms/Trade Names: Butanedinitrile; 1,2-Dicyanoethane; Dinile; Ethylene cyanide; Ethylene dicyanide; 

Succinic dinitrile 

Exposure Limits: 

NIOSH REL: TWA 6 ppm (20 mg/m3

) 

OSHA PEL: none 

Physical Description: Colorless, odorless, waxy solid. 

[Note: Forms cyanide in the body.] 

Measurement Methods 

(see Table 1): 

NIOSH Nitriles Criteria Document

Chemical & Physical Properties: 

MW: 80.1 

BP: 509°F 

Sol: 13% 

Fl.P: 270°F 

IP: ? 

Sp.Gr: 0.99 

VP(212°F): 2 mmHg 

MLT: 134°F 

UEL: ? 

LEL: ? 

Combustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

60 ppm: Sa 

150 ppm: Sa:Cf 

250 ppm: ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, resp sys; head, dizz, lass, conf, convuls; 

blurred vision; dysp; abdom pain, nau, vomit 

TO: Eyes, skin, resp sys, CNS, CVS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

Sucrose Formula: 

C12H22O11

CAS#: 

57-50-1 

RTECS#: 

WN6500000 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: Beet sugar, Cane sugar, Confectioner's sugar, Granulated sugar, Rock candy, 

Saccarose, Sugar, Table sugar 

Exposure Limits: 

NIOSH REL: TWA 10 mg/m3

 (total) 

 TWA 5 mg/m3

 (resp) 

OSHA PEL: TWA 15 mg/m3

 (total) 

 TWA 5 mg/m3

 (resp) 

Physical Description: Hard, white, odorless crystals, lumps, or powder. 

[Note: May have a characteristic, caramel odor when heated.] 

Measurement Methods 

(see Table 1): 

NIOSH 0500, 0600 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Chemical & Physical Properties: 

MW: 342.3 

BP: Decomposes 

Sol: 200% 

Fl.P: NA 

IP: NA 

Sp.Gr: 1.59 

VP: 0 mmHg (approx) 

MLT: 320-367°F (Decomposes) 

UEL: NA 

LEL: NA 

MEC: 45 g/m3

Noncombustible Solid, but fine airborne 

dust may explode. Incompatibilities and Reactivities: Oxidizers, sulfuric acid, nitric acid 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con 

SY: Irrit eyes, skin, upper resp sys; cough 

TO: Eyes, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Breath: Fresh air 
289

S 

Sulfur dioxide Formula: 

SO2

CAS#: 

7446-09-5 

RTECS#: 

WS4550000 

IDLH: 

100 ppm 

Conversion: 1 ppm = 2.62 mg/m3 DOT: 1079 125 

Synonyms/Trade Names: Sulfurous acid anhydride, Sulfurous oxide, Sulfur oxide 

Exposure Limits: 

NIOSH REL: TWA 2 ppm (5 mg/m3

) 

 ST 5 ppm (13 mg/m3

) 

OSHA PEL†: TWA 5 ppm (13 mg/m3

) 

Physical Description: Colorless gas with a characteristic, irritating, pungent odor. 

[Note: A liquid below 14°F. Shipped as a liquefied compressed gas.] 

Measurement Methods 

(see Table 1): 

NIOSH 3800, 6004 

OSHA ID104, ID200 

Chemical & Physical Properties: 

MW: 64.1 

BP: 14°F 

Sol: 10% 

Fl.P: NA 

IP: 12.30 eV 

RGasD: 2.26 

VP: 3.2 atm 

FRZ: -104°F 

UEL: NA 

LEL: NA 

Nonflammable Gas 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Frostbite 

Eyes: Frostbite 

Wash skin: N.R. 

Remove: When wet or contam 

(liquid) 

Change: N.R. 

Provide: Frostbite wash 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

20 ppm: CcrS*/Sa* 

50 ppm: Sa:Cf*/PaprS* 

100 ppm: CcrFS/GmFS/PaprTS*/ 

 SaT:Cf*/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFS/ScbaE 

Incompatibilities and Reactivities: Powdered alkali metals (such as sodium & potassium), water, ammonia, zinc, 

aluminum, brass, copper [Note: Reacts with water to form sulfurous acid (H2SO3).] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con 

SY: Irrit eyes, nose, throat; rhin; choking, cough; reflex 

bronchoconstriction; liquid: frostbite 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Frostbite 

Skin: Frostbite 

Breath: Resp support 

Sulfur hexafluoride Formula: 

SF6

CAS#: 

2551-62-4 

RTECS#: 

WS4900000 

IDLH: 

N.D. 

Conversion: 1 ppm = 5.98 mg/m3 DOT: 1080 126 

Synonyms/Trade Names: Sulfur fluoride [Note: May contain highly toxic sulfur pentafluoride as an impurity.] 

Exposure Limits: 

NIOSH REL: TWA 1000 ppm (6000 mg/m3

) 

OSHA PEL: TWA 1000 ppm (6000 mg/m3

) 

Physical Description: Colorless, odorless gas. [Note: Shipped as a liquefied 

compressed gas. Condenses directly to a solid upon cooling.] 

Measurement Methods 

(see Table 1): 

NIOSH 6602 

Chemical & Physical Properties: 

MW: 146.1 

BP: Sublimes 

Sol(77°F): 0.003% 

Fl.P: NA 

IP: 19.30 eV 

RGasD: 5.11 

VP: 21.5 atm 

FRZ: -83°F (Sublimes) 

UEL: NA 

LEL: NA 

Nonflammable Gas 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Frostbite 

Eyes: Frostbite 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Provide: Frostbite wash 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Disilane 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh 

SY: Asphy: incr breath rate, pulse rate; slight musc inco, 

emotional upset; lass, nau, vomit, convuls; liquid: frostbite 

TO: Resp sys 

First Aid (see Table 6): 

Eye: Frostbite 

Skin: Frostbite 

Breath: Resp support 
290

S 

Sulfuric acid Formula: 

H2SO4

CAS#: 

7664-93-9 

RTECS#: 

WS5600000 

IDLH: 

15 mg/m3

Conversion: DOT: 1830 137; 1831 137 (fuming); 1832 137 (spent) 

Synonyms/Trade Names: Battery acid, Hydrogen sulfate, Oil of vitriol, Sulfuric acid (aqueous) 

Exposure Limits: 

NIOSH REL: TWA 1 mg/m3

OSHA PEL: TWA 1 mg/m3

Physical Description: Colorless to dark-brown, oily, odorless liquid. 

[Note: Pure compound is a solid below 51°F. Often used in an aqueous solution.] 

Measurement Methods 

(see Table 1): 

NIOSH 7903 

OSHA ID113, ID165SG 

Chemical & Physical Properties: 

MW: 98.1 

BP: 554°F 

Sol: Miscible 

Fl.P: NA 

IP: ? 

Sp.Gr: 1.84 (96-98% acid) 

VP: 0.001 mmHg 

FRZ: 51°F 

UEL: NA 

LEL: NA 

Noncombustible Liquid, but capable 

of igniting finely divided combustible 

materials. 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash (>1%) 

 Quick drench (>1%) 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

15 mg/m3

: Sa:Cf£/PaprAgHie£/ 

 CcrFAg100/GmFAg100/ 

 ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFAg100/ScbaE 

Incompatibilities and Reactivities: Organic materials, chlorates, carbides, fulminates, water, powdered metals 

[Note: Reacts violently with water with evolution of heat. Corrosive to metals.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, nose, throat; pulm edema, bron; emphy; conj; 

stomatis; dental erosion; eye, skin burns; derm 

TO: Eyes, skin, resp sys, teeth 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

Sulfur monochloride Formula: 

S2Cl2

CAS#: 

10025-67-9 

RTECS#: 

WS4300000 

IDLH: 

5 ppm 

Conversion: 1 ppm = 5.52 mg/m3 DOT: 1828 137 

Synonyms/Trade Names: Sulfur chloride, Sulfur subchloride, Thiosulfurous dichloride 

Exposure Limits: 

NIOSH REL: C 1 ppm (6 mg/m3

) 

OSHA PEL†: TWA 1 ppm (6 mg/m3

) 

Physical Description: Light-amber to yellow-red, oily liquid with a pungent, 

nauseating, irritating odor. 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical Properties: 

MW: 135.0 

BP: 280°F 

Sol: Decomposes 

Fl.P: 245°F 

IP: 9.40 eV 

Sp.Gr: 1.68 

VP: 7 mmHg 

FRZ: -107°F 

UEL: ? 

LEL: ? 

Class IIIB Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

5 ppm: CcrFS/GmFS/PaprS£/ 

 ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFS/ScbaE 

Incompatibilities and Reactivities: Peroxides, oxides of phosphorous, organics, water 

[Note: Decomposes violently in water to form hydrochloric acid, sulfur dioxide, sulfur, sulfite, thiosulfate, 

and hydrogen sulfide. Corrosive to metals.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, muc memb; lac; cough; eye, skin burns; pulm edema 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 
291

S 

Sulfur pentafluoride Formula: 

S2F10

CAS#: 

5714-22-7 

RTECS#: 

WS4480000 

IDLH: 

1 ppm 

Conversion: 1 ppm = 10.39 mg/m3 DOT: 

Synonyms/Trade Names: Disulfur decafluoride, Sulfur decafluoride 

Exposure Limits: 

NIOSH REL: C 0.01 ppm (0.1 mg/m3

) 

OSHA PEL†: TWA 0.025 ppm (0.25 mg/m3

) 

Measurement Methods 

(see Table 1): 

None available 

Physical Description: Colorless liquid or gas (above 84°F) with an odor like sulfur dioxide. 

Chemical & Physical Properties: 

MW: 254.1 

BP: 84°F 

Sol: Insoluble 

Fl.P: NA 

IP: ? 

RGasD: 8.77 

Sp.Gr(32°F): 2.08 

VP: 561 mmHg 

FRZ: -134°F 

UEL: NA 

LEL: NA 

Noncombustible Liquid 

Nonflammable Gas 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: N.R. 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

0.1 ppm: Sa 

0.25 ppm: Sa:Cf 

0.5 ppm: SaT:Cf/ScbaF/SaF 

1 ppm: Sa:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFAg/ScbaE 

Incompatibilities and Reactivities: None reported 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, resp sys; in animals: pulm edema, hemorr 

TO: Eyes, skin, resp sys, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

Sulfur tetrafluoride Formula: 

SF4

CAS#: 

7783-60-0 

RTECS#: 

WT4800000 

IDLH: 

N.D. 

Conversion: 1 ppm = 4.42 mg/m3 DOT: 2418 125 

Synonyms/Trade Names: Tetrafluorosulfurane 

Exposure Limits: 

NIOSH REL: C 0.1 ppm (0.4 mg/m3

) 

OSHA PEL†: none 

Physical Description: Colorless gas with an odor like sulfur dioxide. 

[Note: Shipped as a liquefied compressed gas.] 

Measurement Methods 

(see Table 1): 

OSHA ID110 

Chemical & Physical Properties: 

MW: 108.1 

BP: -41°F 

Sol: Reacts 

Fl.P: NA 

IP: 12.63 eV 

RGasD: 3.78 

VP(70°F): 10.5 atm 

FRZ: -185°F 

UEL: NA 

LEL: NA 

Nonflammable Gas 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Frostbite 

Eyes: Frostbite 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Provide: Frostbite wash 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Moisture, concentrated sulfuric acid, dioxygen difluoride 

[Note: Readily hydrolyzed by moisture, forming hydrofluoric acid & thionyl fluoride.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con 

SY: Irrit eyes, skin, muc memb; eye, skin burns (from SF4 releasing hydrofluoric 

acid on exposure to moisture); liquid: frostbite; in animals: dysp, lass, rhin 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Frostbite 

Skin: Frostbite 

Breath: Resp support 
292

S 

Sulfuryl fluoride Formula: 

SO2F2

CAS#: 

2699-79-8 

RTECS#: 

WT5075000 

IDLH: 

200 ppm 

Conversion: 1 ppm = 4.18 mg/m3 DOT: 2191 123 

Synonyms/Trade Names: Sulfur difluoride dioxide, Vikane® 

Exposure Limits: 

NIOSH REL: TWA 5 ppm (20 mg/m3

) 

 ST 10 ppm (40 mg/m3

) 

OSHA PEL†: TWA 5 ppm (20 mg/m3

) 

Physical Description: Colorless, odorless gas. [insecticide/fumigant] 

[Note: Shipped as a liquefied compressed gas.] 

Measurement Methods 

(see Table 1): 

NIOSH 6012 

Chemical & Physical 

Properties: 

MW: 102.1 

BP: -68°F 

Sol(32°F): 0.2% 

Fl.P: NA 

IP: 13.04 eV 

RGasD: 3.72 

VP(70°F): 15.8 atm 

FRZ: -212°F 

UEL: NA 

LEL: NA 

Nonflammable Gas 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Frostbite 

Eyes: Frostbite 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Provide: Frostbite wash 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

50 ppm: Sa* 

125 ppm: Sa:Cf* 

200 ppm: ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFS/ScbaE 

Incompatibilities and Reactivities: None reported 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con (liquid) 

SY: Conj, rhinitis, pharyngitis, pares; liquid: frostbite: in animals: narco, 

tremor, convuls; pulm edema; kidney inj 

TO: Eyes, skin, resp sys, CNS, kidneys 

First Aid (see Table 6): 

Eye: Frostbite 

Skin: Frostbite 

Breath: Resp support 

Sulprofos Formula: 

C12H19O2PS3

CAS#: 

35400-43-2 

RTECS#: 

TE4165000 

IDLH: 

N.D. 

Conversion: 1 ppm = 13.19 mg/m3 DOT: 

Synonyms/Trade Names: Bolstar®, O-Ethyl O-(4-methylthio)phenyl S-propylphosphorodithioate 

Exposure Limits: 

NIOSH REL: TWA 1 mg/m3

OSHA PEL†: none 

Physical Description: Tan-colored liquid with a sulfide-like odor. 

Measurement Methods 

(see Table 1): 

NIOSH 5600 

OSHA PV2037 

Chemical & Physical Properties: 

MW: 322.5 

BP: ? 

Sol: Low 

Fl.P: ? 

IP: ? 

Sp.Gr: 1.20 

VP: <8 mmHg 

FRZ: ? 

UEL: ? 

LEL: ? 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: N.R. 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: None reported 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing 

SY: Nau, vomit, abdom cramps, diarr, salv; head, dizz, lass; rhin, 

chest tight; blurred vision, miosis; card irreg; musc fasc; dysp 

TO: Resp sys, CNS, CVS, blood chol 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 
293

T 

2,4,5-T Formula: 

Cl3C6H2OCH2COOH 

CAS#: 

93-76-5 

RTECS#: 

AJ8400000 

IDLH: 

250 mg/m3

Conversion: DOT: 2765 152 

Synonyms/Trade Names: 2,4,5-Trichlorophenoxyacetic acid 

Exposure Limits: 

NIOSH REL: TWA 10 mg/m3

OSHA PEL: TWA 10 mg/m3

Physical Description: Colorless to tan, odorless, crystalline solid. [herbicide] 

Measurement Methods 

(see Table 1): 

NIOSH 5001 

Chemical & Physical Properties: 

MW: 255.5 

BP: Decomposes 

Sol(77°F): 0.03% 

Fl.P: ? 

IP: ? 

Sp.Gr: 1.80 

VP: 1 x 10-7 mmHg 

MLT: 307°F 

UEL: ? 

LEL: ? 

Combustible Solid, but burns 

with difficulty. 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

50 mg/m3

: Qm 

100 mg/m3

: 95XQ/Sa 

250 mg/m3

: Sa:Cf/100F/PaprHie/ 

 ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Incompatibilities and Reactivities: None reported 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: In animals: ataxia; skin irrit, acne-like rash; liver damage 

TO: Skin, liver, GI tract 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash 

Breath: Resp support 

Swallow: Medical attention immed 

Talc (containing no asbestos and 

less than 1% quartz) 

Formula: 

Mg3Si4O10(OH)2

CAS#: 

14807-96-6 

RTECS#: 

WW2710000 

IDLH: 

1000 mg/m3

Conversion: DOT: 

Synonyms/Trade Names: Hydrous magnesium silicate, Steatite talc 

Exposure Limits: 

NIOSH REL: TWA 2 mg/m3

 (resp) 

OSHA PEL†: TWA 20 mppcf 

Physical Description: Odorless, white powder. 

Measurement Methods 

(see Table 1): 

NIOSH P&CAM355 (III) 

Chemical & Physical Properties: 

MW: Varies 

BP: ? 

Sol: Insoluble 

Fl.P: NA 

IP: NA 

Sp.Gr: 2.70-2.80 

VP: 0 mmHg (approx) 

MLT: 1652°F to 1832°F 

UEL: NA 

LEL: NA 

Noncombustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

10 mg/m3

: Qm 

20 mg/m3

: 95XQ/Sa 

50 mg/m3

: PaprHie/Sa:Cf 

100 mg/m3

: 100F/SaT:Cf/PaprTHie/ 

 ScbaF/SaF 

1000 mg/m3

: Sa:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Incompatibilities and Reactivities: None reported 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con 

SY: Fibrotic pneumoconiosis, irrit eyes 

TO: Eyes, resp sys, CVS 

First Aid (see Table 6): 

Eye: Irr immed 

Breath: Fresh air 
294

T 

Tantalum (metal and oxide 

dust, as Ta) 

Formula: 

Ta (metal) 

CAS#:

7440-25-7 (metal) 

RTECS#: 

WW5505000 (metal)

IDLH: 

2500 mg/m3

 (as Ta) 

Conversion: DOT: 

Synonyms/Trade Names: Tantalum metal: Tantalum-181 

Synonyms of other tantalum dusts (including oxide dusts) vary depending upon the specific compound. 

Exposure Limits: 

NIOSH REL: TWA 5 mg/m3

 

 ST 10 mg/m3

OSHA PEL: TWA 5 mg/m3

Physical Description: Metal: Steel-blue to gray solid or black, odorless powder. 

Measurement Methods 

(see Table 1): 

NIOSH 0500 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

25 mg/m3

: Qm 

50 mg/m3

: 95XQ/Sa 

125 mg/m3

: Sa:Cf/PaprHie 

250 mg/m3

: 100F/SaT:Cf/PaprTHie/ 

 ScbaF/SaF 

2500 mg/m3

: Sa:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: HieF/ScbaE 

Chemical & Physical Properties: 

MW: 180.9 

BP: 9797°F 

Sol: Insoluble 

Fl.P: NA 

IP: NA 

Sp.Gr: 16.65 (metal) 

 14.40 (powder) 

VP: 0 mmHg (approx) 

MLT: 5425°F 

UEL: NA 

LEL: NA 

MEC: <200 g/m3

Metal: Combustible Solid; powder 

ignites SPONTANEOUSLY in air. Incompatibilities and Reactivities: Strong oxidizers, bromine trifluoride, 

fluorine 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con

SY: Irrit eyes, skin; in animals: pulm irrit 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Breath: Resp support 

TEDP Formula: 

[(CH3CH2O)2PS]2O 

CAS#: 

3689-24-5 

RTECS#: 

XN4375000 

IDLH: 

10 mg/m3

Conversion: 1 ppm = 13.18 mg/m3 DOT: 1704 153 

Synonyms/Trade Names: Bladafum®, Dithion®, Sulfotep, Tetraethyl dithionopyrophosphate, 

Tetraethyl dithiopyrophosphate, Thiotepp® 

Exposure Limits: 

NIOSH REL: TWA 0.2 mg/m3

 [skin] 

OSHA PEL: TWA 0.2 mg/m3

 [skin] 

Physical Description: Pale-yellow liquid with a garlic-like odor. [Note: A pesticide 

that may be absorbed on a solid carrier or mixed in a more flammable liquid.] 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical Properties: 

MW: 322.3 

BP: Decomposes 

Sol: 0.0007% 

Fl.P: ? 

IP: ? 

Sp.Gr(77°F): 1.20 

VP: 0.0002 mmHg 

FRZ: ? 

UEL: ? 

LEL: ? 

Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

2 mg/m3

: Sa 

5 mg/m3

: Sa:Cf 

10 mg/m3

: ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, iron [Note: Corrosive to iron.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin; eye pain, blurred vision, lac; rhin; head; cyan; anor, 

nau, vomit, diarr; local sweat, lass, twitch, para, Cheyne-Stokes 

respiration, convuls, low BP, card irreg 

TO: Eyes, skin, resp sys, CNS, CVS, blood chol 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 
295

T 

Tellurium Formula: 

Te 

CAS#: 

13494-80-9 

RTECS#: 

WY2625000 

IDLH: 

25 mg/m3

 (as Te) 

Conversion: DOT: 

Synonyms/Trade Names: Aurum paradoxum, Metallum problematum 

Exposure Limits: 

NIOSH REL*: TWA 0.1 mg/m3

 

OSHA PEL*: TWA 0.1 mg/m3

 

[*Note: The REL and PEL also apply to other tellurium compounds (as Te) 

except Tellurium hexafluoride and Bismuth telluride.] 

Measurement Methods 

(see Table 1): 

NIOSH 7300, 7301, 7303, 9102 

OSHA ID121 

Physical Description: Odorless, dark-gray to brown, amorphous powder or grayish-white, brittle solid. 

Chemical & Physical 

Properties: 

MW: 127.6 

BP: 1814°F 

Sol: Insoluble 

Fl.P: NA 

IP: NA 

Sp.Gr: 6.24 

VP: 0 mmHg (approx) 

MLT: 842°F 

UEL: NA 

LEL: NA 

Combustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

0.5 mg/m3

: Qm 

1 mg/m3

: 95XQ/Sa 

2.5 mg/m3

: Sa:Cf/PaprHie 

5 mg/m3

: 100F/SaT:Cf/PaprTHie/ScbaF/SaF 

25 mg/m3

: Sa:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Incompatibilities and Reactivities: Oxidizers, chlorine, cadmium 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Garlic breath, sweat; dry mouth, metallic taste; drow; anor, 

nau, no sweat; derm; in animals: CNS, red blood cell changes 

TO: Skin, CNS, blood 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 

Tellurium hexafluoride Formula: 

TeF6

CAS#: 

7783-80-4 

RTECS#: 

WY2800000 

IDLH: 

1 ppm 

Conversion: 1 ppm = 9.88 mg/m3 DOT: 2195 125 

Synonyms/Trade Names: Tellurium fluoride 

Exposure Limits: 

NIOSH REL: TWA 0.02 ppm (0.2 mg/m3

) 

OSHA PEL: TWA 0.02 ppm (0.2 mg/m3

) 

Physical Description: Colorless gas with a repulsive odor. 

Measurement Methods 

(see Table 1): 

NIOSH S187 (II-3) 

Chemical & Physical Properties: 

MW: 241.6

BP: Sublimes 

Sol: Decomposes 

Fl.P: NA 

IP: ? 

RGasD: 8.34 

VP: >1 atm 

FRZ: -36°F (Sublimes) 

UEL: NA 

LEL: NA 

Nonflammable Gas 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

0.2 ppm: Sa 

0.5 ppm: Sa:Cf 

1 ppm: SaT:Cf/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFS/ScbaE 

Incompatibilities and Reactivities: Water [Note: Hydrolyzes slowly in water to telluric acid.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh 

SY: Head; dysp; garlic breath; in animals: pulm edema 

TO: Resp sys 

First Aid (see Table 6): 

Breath: Resp support 
296

T 

Temephos Formula: 

S[C6H4OP(S)(OCH3)2]2

CAS#: 

3383-96-8 

RTECS#: 

TF6890000 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: Abate®; Temefos; O,O,O'O'-Tetramethyl O,O'-thiodi-p-phenylene phosphorothioate 

Exposure Limits: 

NIOSH REL: TWA 10 mg/m3

 (total) 

 TWA 5 mg/m3

 (resp) 

OSHA PEL†: TWA 15 mg/m3

 (total) 

 TWA 5 mg/m3

 (resp) 

Physical Description: White, crystalline solid or liquid (above 87°F). [insecticide] 

[Note: Technical grade is a viscous, brown liquid.] 

Measurement Methods 

(see Table 1): 

NIOSH 0500, 0600 

OSHA PV2056 

Chemical & Physical Properties: 

MW: 466.5 

BP: 248-257°F (Decomposes) 

Sol: Insoluble 

Fl.P: ? 

IP: ? 

Sp.Gr: 1.32 

VP(77°F): 0.00000007 mmHg 

MLT: 87°F 

UEL: ? 

LEL: ? 

Combustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: None reported 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, blurred vision; dizz; dysp; salv; abdom cramps, 

nau, diarr, vomit 

TO: Eyes, resp sys, CNS, CVS, blood chol 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

TEPP Formula: 

[(CH3CH2O)2PO]2O 

CAS#: 

107-49-3 

RTECS#: 

UX6825000 

IDLH: 

5 mg/m3

Conversion: 1 ppm = 11.87 mg/m3 DOT: 2783 152 (solid); 3018 152 (liquid) 

Synonyms/Trade Names: Ethyl pyrophosphate, Tetraethyl pyrophosphate, Tetron® 

Exposure Limits: 

NIOSH REL: TWA 0.05 mg/m3

 [skin] 

OSHA PEL: TWA 0.05 mg/m3

 [skin] 

Physical Description: Colorless to amber liquid with a faint, fruity odor. [insecticide] 

[Note: A solid below 32°F.] 

Measurement Methods 

(see Table 1): 

NIOSH 2504 

Chemical & Physical Properties: 

MW: 290.2 

BP: Decomposes 

Sol: Miscible 

Fl.P: NA 

IP: ? 

Sp.Gr: 1.19 

VP: 0.0002 mmHg 

FRZ: 32°F 

UEL: NA 

LEL: NA 

Noncombustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

0.5 mg/m3

: Sa 

1.25 mg/m3

: Sa:Cf 

2.5 mg/m3

: SaT:Cf/ScbaF/SaF 

5 mg/m3

: Sa:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, alkalis, water 

[Note: Hydrolyzes quickly in water to form pyrophosphoric acid.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Eye pain, blurred vision, lac; rhin; head, chest tight, cyan; 

anor, nau, vomit, diarr; lass, twitch, para, Cheyne-Stokes 

respiration, convuls; low BP, card irreg; sweat 

TO: Eyes, resp sys, CNS, CVS, GI tract, blood chol 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 
297

T 

m-Terphenyl Formula: 

C6H5C6H4C6H5

CAS#: 

92-06-8 

RTECS#: 

WZ6470000 

IDLH: 

500 mg/m3

Conversion: 1 ppm = 9.57 mg/m3 DOT: 

Synonyms/Trade Names: m-Diphenylbenzene; 1,3-Diphenylbenzene; Isodiphenylbenzene; 3-Phenylbiphenyl; 

1,3-Terphenyl; meta-Terphenyl; m-Triphenyl 

Exposure Limits: 

NIOSH REL: C 5 mg/m3

 (0.5 ppm) 

OSHA PEL†: C 9 mg/m3

 (1 ppm) 

Physical Description: Yellow solid (needles). 

Measurement Methods 

(see Table 1): 

NIOSH 5021 

Chemical & Physical 

Properties: 

MW: 230.3 

BP: 689°F 

Sol: Insoluble 

Fl.P(oc): 375°F 

IP: 8.01 

Sp.Gr: 1.23 

VP(200°F): 0.01 mmHg 

MLT: 192°F 

UEL: ? 

LEL: ? 

Combustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

25 mg/m3

: Qm£ 

50 mg/m3

: 95XQ£/Sa£ 

125 mg/m3

: Sa:Cf£/PaprHie£ 

250 mg/m3

: 100F/ScbaF/SaF 

500 mg/m3

: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Incompatibilities and Reactivities: None reported 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, muc memb; thermal skin burns; head; sore 

throat; in animals: liver, kidney damage 

TO: Eyes, skin, resp sys, liver, kidneys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

o-Terphenyl Formula: 

C6H5C6H4C6H5

CAS#: 

84-15-1 

RTECS#: 

WZ6472000 

IDLH: 

500 mg/m3

Conversion: 1 ppm = 9.42 mg/m3 DOT: 

Synonyms/Trade Names: o-Diphenylbenzene; 1,2-Diphenylbenzene; 2-Phenylbiphenyl; 1,2-Terphenyl; 

ortho-Terphenyl; o-Triphenyl 

Exposure Limits: 

NIOSH REL: C 5 mg/m3

 (0.5 ppm) 

OSHA PEL†: C 9 mg/m3

 (1 ppm) 

Physical Description: Colorless or light-yellow solid. 

Measurement Methods 

(see Table 1): 

NIOSH 5021 

Chemical & Physical 

Properties: 

MW: 230.3 

BP: 630°F 

Sol: Insoluble 

Fl.P(oc): 325°F 

IP: 7.99 eV 

Sp.Gr: 1.1 

VP(200°F): 0.09 mmHg 

MLT: 136°F 

UEL: ? 

LEL: ? 

Combustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

25 mg/m3

: Qm£ 

50 mg/m3

: 95XQ£/Sa£ 

125 mg/m3

: Sa:Cf£/PaprHie£ 

250 mg/m3

: 100F/ScbaF/SaF 

500 mg/m3

: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Incompatibilities and Reactivities: None reported 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, muc memb; thermal skin burns; head; sore 

throat; in animals: liver, kidney damage 

TO: Eyes, skin, resp sys, liver, kidneys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 
298

T 

p-Terphenyl Formula: 

C6H5C6H4C6H5

CAS#: 

92-94-4 

RTECS#: 

WZ6475000 

IDLH: 

500 mg/m3

Conversion: 1 ppm = 9.57 mg/m3 DOT: 

Synonyms/Trade Names: p-Diphenylbenzene; 1,4-Diphenylbenzene; 4-Phenylbiphenyl; 1,4-Terphenyl; 

para-Terphenyl; p-Triphenyl 

Exposure Limits: 

NIOSH REL: C 5 mg/m3

 (0.5 ppm) 

OSHA PEL†: C 9 mg/m3

 (1 ppm) 

Physical Description: White or light-yellow solid. 

Measurement Methods 

(see Table 1): 

NIOSH 5021 

Chemical & Physical Properties: 

MW: 230.3 

BP: 761°F 

Sol: Insoluble 

Fl.P: 405°F 

IP: 7.78 

Sp.Gr: 1.23 

VP: Very low 

MLT: 415°F 

UEL: ? 

LEL: ? 

Combustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

25 mg/m3

: Qm£ 

50 mg/m3

: 95XQ£/Sa£ 

125 mg/m3

: Sa:Cf£/PaprHie£ 

250 mg/m3

: 100F/ScbaF/SaF 

500 mg/m3

: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Incompatibilities and Reactivities: None reported 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, muc memb; thermal skin burns; head; sore 

throat; in animals: liver, kidney damage 

TO: Eyes, skin, resp sys, liver, kidneys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

2,3,7,8-Tetrachloro-dibenzo-p-dioxin Formula: 

C12H4Cl4O2

CAS#: 

1746-01-6 

RTECS#: 

HP3500000 

IDLH: 

Ca [N.D.] 

Conversion: DOT: 

Synonyms/Trade Names: Dioxin; Dioxine; TCDBD; TCDD; 2,3,7,8-TCDD 

[Note: Formed during past production of 2,4,5-trichlorophenol, 2,4,5-T & 2(2,4,5-trichlorophenoxy)propionic acid.] 

Exposure Limits: 

NIOSH REL: Ca 

 See Appendix A 

OSHA PEL: none 

Physical Description: Colorless to white, crystalline solid. 

[Note: Exposure may occur through contact at previously contaminated worksites.] 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical 

Properties: 

MW: 322.0 

BP: Decomposes 

Sol: 0.00000002% 

Fl.P: ? 

IP: ? 

Sp.Gr: ? 

VP(77°F): 0.000002 mmHg 

MLT: 581°F 

UEL: ? 

LEL: ? 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam/Daily 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Incompatibilities and Reactivities: UV light (decomposes) 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes; allergic derm, chloracne; porphyria; GI dist; possible repro, 

terato effects; in animals: liver, kidney damage; hemorr; [carc] 

TO: Eyes, skin, liver, kidneys, repro sys [in animals: tumors at many sites]

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap flush immed 

Breath: Resp support 

Swallow: Medical attention immed 
299

T 

1,1,1,2-Tetrachloro-2,2-difluoroethane Formula: 

CCl3CClF2

CAS#: 

76-11-9 

RTECS#: 

KI1425000 

IDLH: 

2000 ppm 

Conversion: 1 ppm = 8.34 mg/m3 DOT: 

Synonyms/Trade Names: 2,2-Difluoro-1,1,1,2-tetrachloroethane; Freon® 112a; Halocarbon 112a; Refrigerant 

112a 

Exposure Limits: 

NIOSH REL: TWA 500 ppm (4170 mg/m3

) 

OSHA PEL: TWA 500 ppm (4170 mg/m3

) 

Physical Description: Colorless solid with a slight, ether-like odor. 

[Note: A liquid above 105°F.] 

Measurement Methods 

(see Table 1): 

NIOSH 1016 

OSHA 7 

Chemical & Physical Properties: 

MW: 203.8 

BP: 197°F 

Sol: 0.01% 

Fl.P: NA 

IP: ? 

Sp.Gr: 1.65 

VP: 40 mmHg 

MLT: 105°F 

UEL: NA 

LEL: NA 

Noncombustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

2000 ppm: Sa/ScbaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Chemically-active metals such as potassium, beryllium, powdered aluminum, 

zinc, calcium, magnesium & sodium; acids 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin; CNS depres; pulm edema; drow; dysp 

TO: Eyes, skin, resp sys, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 

1,1,2,2-Tetrachloro-1,2-difluoroethane Formula: 

CCl2FCCl2F 

CAS#: 

76-12-0 

RTECS#: 

KI1420000 

IDLH: 

2000 ppm 

Conversion: 1 ppm = 8.34 mg/m3 DOT: 

Synonyms/Trade Names: 1,2-Difluoro-1,1,2,2-tetrachloroethane; Freon® 112; Halocarbon 112; Refrigerant 112 

Exposure Limits: 

NIOSH REL: TWA 500 ppm (4170 mg/m3

) 

OSHA PEL: TWA 500 ppm (4170 mg/m3

) 

Physical Description: Colorless solid or liquid (above 77°F) with a slight, 

ether-like odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1016 

OSHA 7 

Chemical & Physical Properties: 

MW: 203.8 

BP: 199°F 

Sol(77°F): 0.01% 

Fl.P: NA 

IP: 11.30 eV 

Sp.Gr: 1.65 

VP: 40 mmHg 

MLT: 77°F 

UEL: NA 

LEL: NA 

Noncombustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

2000 ppm: Sa/ScbaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Chemically-active metals such as potassium, beryllium, powdered aluminum, 

zinc, magnesium, calcium & sodium; acids 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: In animals: irrit eyes, skin; conj; pulm edema; narco 

TO: Eyes, skin, resp sys, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 
300

T 

1,1,1,2-Tetrachloroethane Formula: 

CCl3CH2Cl 

CAS#: 

630-20-6 

RTECS#: 

KI8450000 

IDLH: 

N.D. 

Conversion: DOT: 1702 151 

Synonyms/Trade Names: None 

Exposure Limits: 

NIOSH REL: Handle with caution in the workplace. 

 See Appendix C (Chloroethanes) 

OSHA PEL: none 

Physical Description: Yellowish-red liquid. 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical Properties: 

MW: 167.9 

BP: 267°F 

Sol: 0.1% 

Fl.P: ? 

IP: ? 

Sp.Gr: 1.54 

VP(77°F): 14 mmHg 

FRZ: -94°F 

UEL: ? 

LEL: ? 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Potassium; sodium; dinitrogen tetraoxide; potassium hydroxide; 

nitrogen tetroxide; sodium potassium alloy; 2,4-dinitrophenyl disulfide 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin; lass, restless, irreg respiration, musc inco; in 

animals: liver changes 

TO: Eyes, skin, CNS, liver 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

1,1,2,2-Tetrachloroethane Formula: 

CHCl2CHCl2

CAS#: 

79-34-5 

RTECS#: 

KI8575000 

IDLH: 

Ca [100 ppm] 

Conversion: 1 ppm = 6.87 mg/m3 DOT: 1702 151 

Synonyms/Trade Names: Acetylene tetrachloride, Symmetrical tetrachloroethane 

Exposure Limits: 

NIOSH REL: Ca 

 TWA 1 ppm (7 mg/m3

) [skin] 

 See Appendix A 

 See Appendix C (Chloroethanes) 

OSHA PEL†: TWA 5 ppm (35 mg/m3

) [skin] 

Measurement Methods 

(see Table 1): 

NIOSH 1019, 2562 

OSHA 7 

Physical Description: Colorless to pale-yellow liquid with a pungent, chloroform-like odor. 

Chemical & Physical Properties: 

MW: 167.9 

BP: 296°F 

Sol: 0.3% 

Fl.P: NA 

IP: 11.10 eV 

Sp.Gr(77°F): 1.59 

VP: 5 mmHg 

FRZ: -33°F 

UEL: NA 

LEL: NA 

Noncombustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Chemically-active metals, strong caustics, fuming sulfuric acid 

[Note: Degrades slowly when exposed to air.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Nau, vomit, abdom pain; tremor fingers; jaun, hepatitis, liver 

tend; derm; leucyt; kidney damage; [carc] 

TO: Skin, liver, kidneys, CNS, GI tract [in animals: liver tumors] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 
301

T 

Tetrachloroethylene Formula: 

Cl2C=CCl2

CAS#: 

127-18-4 

RTECS#: 

KX3850000 

IDLH: 

Ca [150 ppm] 

Conversion: 1 ppm = 6.78 mg/m3 DOT: 1897 160 

Synonyms/Trade Names: Perchlorethylene, Perchloroethylene, Perk, Tetrachlorethylene 

Exposure Limits: 

NIOSH REL: Ca 

 Minimize workplace exposure concentrations. 

 See Appendix A 

OSHA PEL†: TWA 100 ppm 

 C 200 ppm (for 5 mins. in any 3-hr. period), with a maximum peak of 300 ppm 

Physical Description: Colorless liquid with a mild, chloroform-like odor. 

Measurement 

Methods 

(see Table 1): 

NIOSH 1003 

OSHA 1001 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Chemical & Physical Properties: 

MW: 165.8 

BP: 250°F 

Sol: 0.02% 

Fl.P: NA 

IP: 9.32 eV 

Sp.Gr: 1.62 

VP: 14 mmHg 

FRZ: -2°F 

UEL: NA 

LEL: NA 

Noncombustible Liquid, but 

decomposes in a fire to hydrogen 

chloride and phosgene. 

Incompatibilities and Reactivities: Strong oxidizers; chemically-active 

metals such as lithium, beryllium & barium; caustic soda; sodium hydroxide; 

potash 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, nose, throat, resp sys; nau; flush face, neck; dizz, 

inco; head, drow; skin eryt; liver damage; [carc] 

TO: Eyes, skin, resp sys, liver, kidneys, CNS [in animals: liver tumors] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 

Tetrachloronaphthalene Formula: 

C10H4Cl4

CAS#: 

1335-88-2 

RTECS#: 

QK3700000 

IDLH: 

See Appendix F 

Conversion: DOT: 

Synonyms/Trade Names: Halowax®, Nibren wax, Seekay wax 

Exposure Limits: 

NIOSH REL: TWA 2 mg/m3

 [skin] 

OSHA PEL: TWA 2 mg/m3

 [skin] 

Physical Description: Colorless to pale-yellow solid with an aromatic odor. 

Measurement Methods 

(see Table 1): 

NIOSH S130 (II-2) 

Chemical & Physical Properties: 

MW: 265.9 

BP: 599-680°F 

Sol: Insoluble 

Fl.P(oc): 410°F 

IP: ? 

Sp.Gr: 1.59-1.65 

VP: <1 mmHg 

MLT: 360°F 

UEL: ? 

LEL: ? 

Combustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

20 mg/m3

: ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

See Appendix F 

Incompatibilities and Reactivities: Strong oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Acne-form derm; head, lass, anor, dizz; jaun, liver inj 

TO: Liver, skin, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 
302

T 

Tetraethyl lead (as Pb) Formula: 

Pb(C2H5)4

CAS#: 

78-00-2 

RTECS#: 

TP4550000 

IDLH: 

40 mg/m3

 (as Pb)

Conversion: DOT: 1649 131 

Synonyms/Trade Names: Lead tetraethyl, TEL, Tetraethylplumbane 

Exposure Limits: 

NIOSH REL: TWA 0.075 mg/m3

 [skin] 

OSHA PEL: TWA 0.075 mg/m3

 [skin] 

Measurement Methods 

(see Table 1): 

NIOSH 2533 

Physical Description: Colorless liquid (unless dyed red, orange, or blue) with a pleasant, sweet odor. 

[Note: Main usage is in anti-knock additives for gasoline.] 

Chemical & Physical 

Properties: 

MW: 323.5 

BP: 228°F (Decomposes) 

Sol: 0.00002% 

Fl.P: 200°F 

IP: 11.10 eV 

Sp.Gr: 1.65 

VP: 0.2 mmHg 

FRZ: -202°F 

UEL: ? 

LEL: 1.8% 

Class IIIB Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact (>0.1%) 

Eyes: Prevent eye contact 

Wash skin: When contam (>0.1%) 

Remove: When wet or contam (>0.1%) 

Change: Daily 

Provide: Quick drench (>0.1%) 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

0.75 mg/m3

: Sa 

1.875 mg/m3

: Sa:Cf 

3.75 mg/m3

: SaT:Cf/ScbaF/SaF 

40 mg/m3

: Sa:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, sulfuryl chloride, rust, potassium permanganate 

[Note: Decomposes slowly at room temperature and more rapidly at higher temperatures.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Insom, lass, anxiety; tremor, hyper-reflexia, spasticity; 

bradycardia, hypotension, hypothermia, pallor, nau, anor, lowwgt; conf, halu, psychosis, mania, convuls, coma; eye irrit 

TO: CNS, CVS, kidneys, eyes 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

Tetrahydrofuran Formula: 

C4H8O 

CAS#: 

109-99-9 

RTECS#: 

LU5950000 

IDLH: 

2000 ppm [10%LEL]

Conversion: 1 ppm = 2.95 mg/m3 DOT: 2056 127 

Synonyms/Trade Names: Diethylene oxide; 1,4-Epoxybutane; Tetramethylene oxide; THF 

Exposure Limits: 

NIOSH REL: TWA 200 ppm (590 mg/m3

) 

 ST 250 ppm (735 mg/m3

) 

OSHA PEL†: TWA 200 ppm (590 mg/m3

) 

Physical Description: Colorless liquid with an ether-like odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1609, 3800 

OSHA 7 

Chemical & Physical 

Properties: 

MW: 72.1 

BP: 151°F 

Sol: Miscible 

Fl.P: 6°F 

IP: 9.45 eV 

Sp.Gr: 0.89 

VP: 132 mmHg 

FRZ: -163°F 

UEL: 11.8% 

LEL: 2% 

Class IB Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

2000 ppm: Sa:Cf£/CcrFOv/GmFOv/ 

 PaprOv£/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, lithium-aluminum alloys 

[Note: Peroxides may accumulate upon prolonged storage in presence of air.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con, Ing 

SY: Irrit eyes, upper resp sys; nau, dizz, head, CNS depres 

TO: Eyes, resp sys, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush prompt 

Breath: Resp support 

Swallow: Medical attention immed 
303

T 

Tetramethyl lead (as Pb) Formula: 

Pb(CH3)4

CAS#: 

75-74-1 

RTECS#: 

TP4725000 

IDLH: 

40 mg/m3

 (as Pb) 

Conversion: DOT: 

Synonyms/Trade Names: Lead tetramethyl, Tetramethylplumbane, TML 

Exposure Limits: 

NIOSH REL: TWA 0.075 mg/m3

 [skin] 

OSHA PEL: TWA 0.075 mg/m3

 [skin] 

Measurement Methods 

(see Table 1): 

NIOSH 2534 

Physical Description: Colorless liquid (unless dyed red, orange, or blue) with a fruity odor. 

[Note: Main usage is in anti-knock additives for gasoline.] 

Chemical & Physical 

Properties: 

MW: 267.3 

BP: 212°F (Decomposes) 

Sol: 0.002% 

Fl.P: 100°F 

IP: 8.50 eV 

Sp.Gr: 2.00 

VP: 23 mmHg 

FRZ: -15°F 

UEL: ? 

LEL: ? 

Class II Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact (>0.1%) 

Eyes: Prevent eye contact 

Wash skin: When contam (>0.1%) 

Remove: When wet or contam (>0.1%) 

Change: Daily 

Provide: Quick drench (>0.1%) 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

0.75 mg/m3

: Sa 

1.875 mg/m3

: Sa:Cf 

3.75 mg/m3

: SaT:Cf/ScbaF/SaF 

40 mg/m3

: Sa:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers such as sulfuryl chloride or potassium permanganate 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Insom, bad dreams, restless, anxious; hypotension; nau, 

anor; delirium, mania, convuls; coma 

TO: CNS, CVS, kidneys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

Tetramethyl succinonitrile Formula: 

(CH3)2C(CN)C(CN)(CH3)2

CAS#: 

3333-52-6 

RTECS#: 

WN4025000 

IDLH: 

5 ppm 

Conversion: 1 ppm = 5.57 mg/m3 DOT: 

Synonyms/Trade Names: Tetramethyl succinodinitrile, TMSN 

Exposure Limits: 

NIOSH REL: TWA 3 mg/m3

 (0.5 ppm) [skin] 

OSHA PEL: TWA 3 mg/m3

 (0.5 ppm) [skin] 

Physical Description: Colorless, odorless solid. [Note: Forms cyanide in the body.] 

Measurement Methods 

(see Table 1): 

NIOSH S155 (II-3) 

OSHA 7 

Chemical & Physical 

Properties: 

MW: 136.2 

BP: Sublimes 

Sol: Insoluble 

Fl.P: ? 

IP: ? 

Sp.Gr: 1.07 

VP: ? 

MLT: 338°F (Sublimes) 

UEL: ? 

LEL: ? 

Combustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

28 mg/m3

: Sa/ScbaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Head, nau; convuls, coma; liver, kidney, GI effects 

TO: CNS, liver, kidneys, GI tract 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 
304

T 

Tetranitromethane Formula: 

C(NO2)4

CAS#: 

509-14-8 

RTECS#: 

PB4025000 

IDLH: 

4 ppm 

Conversion: 1 ppm = 8.02 mg/m3 DOT: 1510 143 

Synonyms/Trade Names: Tetan, TNM 

Exposure Limits: 

NIOSH REL: TWA 1 ppm (8 mg/m3

) 

OSHA PEL: TWA 1 ppm (8 mg/m3

) 

Physical Description: Colorless to pale-yellow liquid or solid (below 57°F) with a 

pungent odor. 

Measurement Methods 

(see Table 1): 

NIOSH 3513 

Chemical & Physical 

Properties: 

MW: 196.0 

BP: 259°F 

Sol: Insoluble 

Fl.P: ? 

IP: ? 

Sp.Gr: 1.62 

VP: 8 mmHg 

FRZ: 57°F 

UEL: ? 

LEL: ? 

Combustible Liquid, but difficult 

to ignite. 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: Daily 

Provide: Eyewash 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

4 ppm: Sa:Cf£/CcrFS¿/GmFS¿/ 

 PaprS¿£/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFS¿/ScbaE 

Incompatibilities and Reactivities: Hydrocarbons, alkalis, metals, oxidizers, aluminum, toluene, cotton 

[Note: Combustible material wet with tetranitromethane may be highly explosive.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, nose, throat; dizz, head; chest pain, dysp; 

methemo, cyan; skin burns 

TO: Eyes, skin, resp sys, blood, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 

Tetrasodium pyrophosphate Formula: 

Na4P2O7

CAS#: 

7722-88-5 

RTECS#: 

UX7350000 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: Pyrophosphate, Sodium pyrophosphate, Tetrasodium diphosphate, 

Tetrasodium pyrophosphate (anhydrous), TSPP 

Exposure Limits: 

NIOSH REL: TWA 5 mg/m3

OSHA PEL†: none 

Measurement Methods 

(see Table 1): 

NIOSH 0500 

Physical Description: Odorless, white powder or granules. 

[Note: The decahydrate (Na4P2O7×10H2O) is in the form of colorless, transparent crystals.] 

Chemical & Physical Properties: 

MW: 265.9 

BP: Decomposes 

Sol(77°F): 7% 

Fl.P: NA 

IP: NA 

Sp.Gr: 2.45 

VP: 0 mmHg (approx) 

MLT: 1810°F 

UEL: NA 

LEL: NA 

Noncombustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash (solution) 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Strong acids 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, nose, throat; derm 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 
305

T 

Tetryl Formula: 

(NO2)3C6H2N(NO2)CH3

CAS#: 

479-45-8 

RTECS#: 

BY6300000 

IDLH: 

750 mg/m3

Conversion: DOT: 

Synonyms/Trade Names: N-Methyl-N,2,4,6-tetranitroaniline; Nitramine; 2,4,6-Tetryl; 

2,4,6-Trinitrophenyl-N-methylnitramine 

Exposure Limits: 

NIOSH REL: TWA 1.5 mg/m3

 [skin] 

OSHA PEL: TWA 1.5 mg/m3

 [skin] 

Physical Description: Colorless to yellow, odorless, crystalline solid. 

Measurement Methods 

(see Table 1): 

NIOSH S225 (II-3) 

Chemical & Physical Properties: 

MW: 287.2 

BP: 356-374°F (Explodes) 

Sol: 0.02% 

Fl.P: Explodes 

IP: ? 

Sp.Gr: 1.57 

VP: <1 mmHg 

MLT: 268°F 

UEL: ? 

LEL: ? 

Combustible Solid 

(Class A Explosive) 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam/Daily 

Remove: When wet or contam 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

7.5 mg/m3

: Qm 

15 mg/m3

: 95XQ*/Sa* 

37.5 mg/m3

: Sa:Cf*/PaprHie* 

75 mg/m3

: 100F/ScbaF/SaF 

750 mg/m3

: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Incompatibilities and Reactivities: Oxidizable materials, hydrazine 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Sens derm, itch, eryt; edema on nasal folds, cheeks, neck; kera; 

sneez; anemia; cough, coryza; irrity; mal, head, lass, insom; nau, vomit; 

liver, kidney damage 

TO: Eyes, skin, resp sys, CNS, liver, kidneys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 

Thallium (soluble compounds, as Tl) Formula: CAS#: RTECS#: IDLH: 

15 mg/m3

 (as Tl) 

Conversion: DOT: 1707 151 (compounds, n.o.s.) 

Synonyms/Trade Names: Synonyms vary depending upon the specific soluble thallium compound. 

Exposure Limits: 

NIOSH REL: TWA 0.1 mg/m3

 [skin] 

OSHA PEL: TWA 0.1 mg/m3

 [skin] 

Physical Description: Appearance and odor vary depending upon the specific 

soluble thallium compound. 

Measurement Methods 

(see Table 1): 

NIOSH 7300, 7301, 7303, 9102 

OSHA ID121 

Chemical & Physical 

Properties: 

Properties vary depending 

upon the specific soluble 

thallium compound. 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

0.5 mg/m3

: Qm 

1 mg/m3

: 95XQ/Sa 

2.5 mg/m3

: Sa:Cf/PaprHie 

5 mg/m3

: 100F/SaT:Cf/PaprTHie/ScbaF/SaF 

15 mg/m3

: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Incompatibilities and Reactivities: Varies 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Nau, diarr, abdom pain, vomit; ptosis, strabismus; peri 

neuritis, tremor; retster tight, chest pain, pulm edema; convuls, 

chorea, psychosis; liver, kidney damage; alopecia; pares legs 

TO: Eyes, resp sys, CNS, liver, kidneys, GI tract, body hair 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush prompt 

Breath: Resp support 

Swallow: Medical attention immed 
306

T 

4,4'-Thiobis(6-tert-butyl-m-cresol) Formula: 

[CH3(OH)C6H2C(CH3)3]2S 

CAS#: 

96-69-5 

RTECS#: 

GP3150000 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: 4,4'-Thiobis(3-methyl-6-tert-butylphenol); 

1,1'-Thiobis(2-methyl-4-hydroxy-5-tert-butylbenzene) 

Exposure Limits: 

NIOSH REL: TWA 10 mg/m3

 (total) 

 TWA 5 mg/m3

 (resp) 

OSHA PEL†: TWA 15 mg/m3

 (total) 

 TWA 5 mg/m3

 (resp) 

Physical Description: Light-gray to tan powder with a slightly aromatic odor. 

Measurement Methods 

(see Table 1): 

NIOSH 0500, 0600 

Chemical & Physical Properties: 

MW: 358.6 

BP: ? 

Sol: 0.08% 

Fl.P: 420°F 

IP: ? 

Sp.Gr: 1.10 

VP: 0.0000006 mmHg 

MLT: 302°F 

UEL: NA 

LEL: NA 

Combustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: None reported 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, resp sys 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Breath: Fresh air 

Swallow: Medical attention immed 

Thioglycolic acid Formula: 

HSCH2COOH 

CAS#: 

68-11-1 

RTECS#: 

AI5950000 

IDLH: 

N.D. 

Conversion: 1 ppm = 3.77 mg/m3 DOT: 1940 153 

Synonyms/Trade Names: Acetyl mercaptan, Mercaptoacetate, Mercaptoacetic acid, 2-Mercaptoacetic acid, 

2-Thioglycolic acid, Thiovanic acid 

Exposure Limits: 

NIOSH REL: TWA 1 ppm (4 mg/m3

) [skin] 

OSHA PEL†: none 

Physical Description: Colorless liquid with a strong, disagreeable odor characteristic of 

mercaptans. [Note: Olfactory fatigue may occur after short exposures.] 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical Properties: 

MW: 92.1 

BP: ? 

Sol: Miscible 

Fl.P: >230°F 

IP: ? 

Sp.Gr: 1.32 

VP(64°F): 10 mmHg 

FRZ: 2°F 

UEL: ? 

LEL: 5.9% 

Class IIIB Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Air, strong oxidizers, bases, active metals (e.g., sodium potassium, 

magnesium, calcium) [Note: Readily oxidized by air.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, nose, throat; lac, corn damage; skin burns, 

blisters; in animals: lass; gasping respirations; convuls 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 
307

T 

Thionyl chloride Formula: 

SOCl2

CAS#: 

7719-09-7 

RTECS#: 

XM5150000 

IDLH: 

N.D. 

Conversion: 1 ppm = 4.87 mg/m3 DOT: 1836 137 

Synonyms/Trade Names: Sulfinyl chloride, Sulfur chloride oxide, Sulfurous dichloride, Sulfurous oxychloride, 

Thionyl dichloride 

Exposure Limits: 

NIOSH REL: C 1 ppm (5 mg/m3

) 

OSHA PEL†: none 

Physical Description: Colorless to yellow to reddish liquid with a pungent odor like 

sulfur dioxide. [Note: Fumes form when exposed to moist air.] 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical Properties: 

MW: 119.0 

BP: 169°F 

Sol: Reacts 

Fl.P: NA 

IP: ? 

Sp.Gr: 1.64 

VP(70°F): 100 mmHg 

FRZ: -156°F 

UEL: NA 

LEL: NA 

Noncombustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Water, acids, alkalis, ammonia, chloryl perchlorate 

[Note: Reacts violently with water to form sulfur dioxide & hydrogen chloride.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, muc memb; eye, skin burns 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

Thiram Formula: 

C6H12N2S4

CAS#: 

137-26-8 

RTECS#: 

JO1400000 

IDLH: 

100 mg/m3

Conversion: DOT: 2771 151 

Synonyms/Trade Names: bis(Dimethylthiocarbamoyl) disulfide, Tetramethylthiuram disulfide 

Exposure Limits: 

NIOSH REL: TWA 5 mg/m3

OSHA PEL: TWA 5 mg/m3

Physical Description: Colorless to yellow, crystalline solid with a characteristic odor. 

[Note: Commercial pesticide products may be dyed blue.] 

Measurement Methods 

(see Table 1): 

NIOSH 5005 

Chemical & Physical 

Properties: 

MW: 240.4 

BP: Decomposes 

Sol: 0.003% 

Fl.P: ? 

IP: ? 

Sp.Gr: 1.29 

VP: 0.000008 mmHg 

MLT: 312°F 

UEL: ? 

LEL: ? 

Combustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

50 mg/m3

: CcrOv95*/Sa* 

100 mg/m3

: Sa:Cf*/CcrFOv100/GmFOv100/ 

 PaprOvHie*/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, strong acids, oxidizable materials 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, muc memb; derm; Antabuse-like effects 

TO: Eyes, skin, resp sys, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 
308

T 

Tin Formula: 

Sn 

CAS#: 

7440-31-5 

RTECS#: 

XP7320000 

IDLH: 

100 mg/m3

 (as Sn) 

Conversion: DOT: 

Synonyms/Trade Names: Metallic tin, Tin flake, Tin metal, Tin powder 

Exposure Limits: 

NIOSH REL*: TWA 2 mg/m3

 

OSHA PEL*: TWA 2 mg/m3

 

[*Note: The REL and PEL also apply to other inorganic tin compounds (as Sn) except 

tin oxides.] 

Physical Description: Gray to almost silver-white, ductile, malleable, lustrous solid. 

Measurement Methods 

(see Table 1): 

NIOSH 7300, 7301, 7303 

OSHA ID121, ID206 

Chemical & Physical Properties: 

MW: 118.7 

BP: 4545°F 

Sol: Insoluble 

Fl.P: NA 

IP: NA 

Sp.Gr: 7.28 

VP: 0 mmHg (approx) 

MLT: 449°F 

UEL: NA 

LEL: NA 

Noncombustible Solid, but powdered 

form may ignite. 

Personal Protection/Sanitation

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

10 mg/m3

: Qm* 

20 mg/m3

: 95XQ*/Sa* 

50 mg/m3

: Sa:Cf*/PaprHie* 

100 mg/m3

: 100F/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Incompatibilities and Reactivities: Chlorine, turpentine, acids, alkalis 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con 

SY: Irrit eyes, skin, resp sys; in animals: vomit, diarr, para with 

musc twitch 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

Tin (organic compounds, as Sn) Formula: CAS#: RTECS#: IDLH: 

25 mg/m3

 (as Sn)

Conversion: DOT: 

Synonyms/Trade Names: Synonyms vary depending upon the specific organic tin compound. 

[Note: Also see specific listing for Cyhexatin.] 

Exposure Limits: 

NIOSH REL*: TWA 0.1 mg/m3

 [skin] 

 [*Note: The REL applies to all organic tin compounds except Cyhexatin.] 

OSHA PEL*: TWA 0.1 mg/m3

 

 [*Note: The PEL applies to all organic tin compounds.] 

Measurement Methods 

(see Table 1): 

NIOSH 5504 

Physical Description: Appearance and odor vary depending upon the specific organic tin compound. 

Chemical & Physical 

Properties: 

Properties vary depending 

upon the specific organic 

tin compound. 

Personal Protection/Sanitation 

(see Table 2): 

Recommendations regarding 

personal protective clothing vary 

depending upon the specific 

compound. 

 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

1 mg/m3

: CcrOv95/Sa 

2.5 mg/m3

: Sa:Cf/PaprOvHie 

5 mg/m3

: CcrFOv100/GmFOv100/ 

 PaprTOvHie/SaT:Cf/ScbaF/SaF 

25 mg/m3

: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Incompatibilities and Reactivities: Varies 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, resp sys; head, dizz; psycho-neurologic dist; sore 

throat, cough; abdom pain, vomit; urine retention; paresis, focal anes; skin 

burns, pruritus; in animals: hemolysis; hepatic nec; kidney damage 

TO: Eyes, skin, resp sys, CNS, liver, kidneys, urinary tract, blood 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 
309

T 

Tin(II) oxide (as Sn) Formula: 

SnO 

CAS#: 

21651-19-4 

RTECS#: 

XQ3700000 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: Stannous oxide, Tin protoxide [Note: Also see specific listing for Tin(IV) oxide (as Sn).] 

Exposure Limits: 

NIOSH REL: TWA 2 mg/m3

OSHA PEL†: none 

Physical Description: Brownish-black powder. 

Measurement Methods 

(see Table 1): 

NIOSH 7300, 7301, 7303 

Chemical & Physical Properties: 

MW: 134.7 

BP: Decomposes 

Sol: Insoluble 

Fl.P: NA 

IP: NA 

Sp.Gr: 6.3 

VP: 0 mmHg (approx) 

MLT(600 mmHg): 1976°F (Decomposes) 

UEL: NA 

LEL: NA 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: None reported 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con 

SY: Stannosis (benign pneumoconiosis): dysp, decr pulm func 

TO: Resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Breath: Fresh air 

Tin(IV) oxide (as Sn) Formula: 

SnO2

CAS#: 

18282-10-5 

RTECS#: 

XQ4000000 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: Stannic dioxide, Stannic oxide, White tin oxide 

[Note: Also see specific listing for Tin(II) oxide (as Sn).] 

Exposure Limits: 

NIOSH REL: TWA 2 mg/m3

OSHA PEL†: none 

Physical Description: White or slightly gray powder. 

Measurement Methods 

(see Table 1): 

NIOSH 7300, 7301, 7303 

Chemical & Physical Properties: 

MW: 150.7 

BP: Decomposes 

Sol: Insoluble 

Fl.P: NA 

IP: NA 

Sp.Gr: 6.95 

VP: 0 mmHg (approx) 

MLT: 2966°F (Decomposes) 

UEL: NA 

LEL: NA 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Chlorine trifluoride 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con 

SY: Stannosis (benign pneumoconiosis): dysp, decr pulm func 

TO: Resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Breath: Fresh air 
310

T 

Titanium dioxide Formula: 

TiO2

CAS#: 

13463-67-7 

RTECS#: 

XR2275000 

IDLH: 

Ca [5000 mg/m3

] 

Conversion: DOT: 

Synonyms/Trade Names: Rutile, Titanium oxide, Titanium peroxide 

Exposure Limits: 

NIOSH REL: Ca 

 See Appendix A 

OSHA PEL†: TWA 15 mg/m3

Physical Description: White, odorless powder. 

Measurement Methods 

(see Table 1): 

NIOSH S385 (II-3) 

Chemical & Physical Properties: 

MW: 79.9 

BP: 4532-5432°F 

Sol: Insoluble 

Fl.P: NA 

IP: NA 

Sp.Gr: 4.26 

VP: 0 mmHg (approx) 

MLT: 3326-3362°F 

UEL: NA 

LEL: NA 

Noncombustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE

Incompatibilities and Reactivities: None reported 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh 

SY: Lung fib; [carc] 

TO: Resp sys [in animals: lung tumors] 

First Aid (see Table 6): 

Breath: Resp support 

o-Tolidine Formula: 

C14H16N2

CAS#: 

119-93-7 

RTECS#: 

DD1225000 

IDLH: 

Ca [N.D.] 

Conversion: DOT: 

Synonyms/Trade Names: 4,4'-Diamino-3,3'-dimethylbiphenyl; Diaminoditolyl; 3,3'-Dimethylbenzidine; 

3,3'-Dimethyl-4,4'-diphenyldiamine; 3,3'-Tolidine 

Exposure Limits: 

NIOSH REL: Ca 

 C 0.02 mg/m3

 [60-minute] [skin] 

 See Appendix A 

 See Appendix C 

OSHA PEL: See Appendix C 

Measurement Methods 

(see Table 1): 

NIOSH 5013 

OSHA 71 

Physical Description: White to reddish crystals or powder. 

[Note: Darkens on exposure to air. Often used in paste or wet cake form. Used as a basis for many dyes.] 

Chemical & Physical Properties: 

MW: 212.3 

BP: 572°F 

Sol: 0.1% 

Fl.P: ? 

IP: ? 

Sp.Gr: ? 

VP: ? 

MLT: 264°F 

UEL: ? 

LEL: ? 

Combustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam/Daily 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, nose; in animals: liver, kidney damage; [carc] 

TO: Eyes, resp sys, liver, kidneys [in animals: liver, bladder & 

mammary gland tumors] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap flush immed 

Breath: Resp support 

Swallow: Medical attention immed 
311

T 

Toluene Formula: 

C6H5CH3

CAS#: 

108-88-3 

RTECS#: 

XS5250000 

IDLH: 

500 ppm 

Conversion: 1 ppm = 3.77 mg/m3 DOT: 1294 130 

Synonyms/Trade Names: Methyl benzene, Methyl benzol, Phenyl methane, Toluol 

Exposure Limits: 

NIOSH REL: TWA 100 ppm (375 mg/m3

) 

 ST 150 ppm (560 mg/m3

) 

OSHA PEL†: TWA 200 ppm 

 C 300 ppm 

 500 ppm (10-minute maximum peak) 

Measurement Methods 

(see Table 1): 

NIOSH 1500, 1501, 3800, 4000 

OSHA 111 

Physical Description: Colorless liquid with a sweet, pungent, benzene-like odor. 

Chemical & Physical Properties: 

MW: 92.1 

BP: 232°F 

Sol(74°F): 0.07% 

Fl.P: 40°F 

IP: 8.82 eV 

Sp.Gr: 0.87 

VP: 21 mmHg 

FRZ: -139°F 

UEL: 7.1% 

LEL: 1.1% 

Class IB Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

500 ppm: CcrOv*/PaprOv*/ 

 GmFOv/Sa*/ScbaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, nose; lass, conf, euph, dizz, head; dilated pupils, lac; anxi, 

musc ftg, insom; pares; derm; liver, kidney damage 

TO: Eyes, skin, resp sys, CNS, liver, kidneys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 

Toluenediamine Formula: 

CH3C6H3(NH2)2

CAS#: 

25376-45-8 

95-80-7 (2,4-TDA) 

RTECS#: 

XS9445000 

XS9625000 (2,4-TDA) 

IDLH: 

Ca [N.D.] 

Conversion: DOT: 1709 151 (2,4-Toluenediamine) 

Synonyms/Trade Names: Diaminotoluene, Methylphenylene diamine, TDA, Toluenediamine isomers, 

Tolylenediamine [Note: Various isomers of TDA exist.] 

Exposure Limits: 

NIOSH REL: Ca (all isomers) 

 See Appendix A 

OSHA PEL: none 

Measurement Methods 

(see Table 1): 

NIOSH 5516 

OSHA 65 

Physical Description: Colorless to brown, needle-shaped crystals or powder. 

[Note: Tends to darken on storage and exposure to air. Properties given are for 2,4-TDA.] 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam/Daily 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Chemical & Physical Properties: 

MW: 122.2 

BP: 558°F 

Sol: Soluble 

Fl.P: 300°F 

IP: ? 

Sp.Gr: 1.05 (Liquid at 212°F) 

VP(224°F): 1 mmHg 

MLT: 210°F 

UEL: ? 

LEL: ? 

Combustible Solid Incompatibilities and Reactivities: None reported 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, nose, throat; derm; ataxia, tacar, nau, vomit, convuls, 

resp depres; methemo, cyan, head, lass, dizz, bluish skin; liver inj; [carc] 

TO: Eyes, skin, resp sys, blood, CVS, liver [in animals: liver, skin & mammary 

gland tumors] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 
312

T 

Toluene-2,4-diisocyanate Formula: 

CH3C6H3(NCO)2

CAS#: 

584-84-9 

RTECS#: 

CZ6300000 

IDLH: 

Ca [2.5 ppm] 

Conversion: 1 ppm = 7.13 mg/m3 DOT: 2078 156 

Synonyms/Trade Names: TDI; 2,4-TDI; 2,4-Toluene diisocyanate 

Exposure Limits: 

NIOSH REL: Ca 

 See Appendix A 

OSHA PEL†: C 0.02 ppm (0.14 mg/m3

) 

Measurement Methods 

(see Table 1): 

NIOSH 2535, 5521, 5522, 5525 

OSHA 18, 33, 42 

Physical Description: Colorless to pale-yellow solid or liquid (above 71°F) with a sharp, pungent odor. 

Chemical & Physical Properties: 

MW: 174.2 

BP: 484°F 

Sol: Insoluble 

Fl.P: 260°F 

IP: ? 

Sp.Gr: 1.22 

VP(77°F): 0.01 mmHg 

MLT: 71°F 

UEL: 9.5% 

LEL: 0.9% 

Class IIIB Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam/Daily 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, water, acids, bases & amines (may cause foam & spatter); 

alcohols [Note: Reacts slowly with water to form carbon dioxide and polyureas.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, nose, throat; choke, paroxysmal cough; chest pain, 

retster soreness; nau, vomit, abdom pain; bron, bronchospasm, pulm 

edema; dysp, asthma; conj, lac; derm, skin sens; [carc] 

TO: Eyes, skin, resp sys [in animals: pancreas, liver, mammary gland, 

circulatory sys & skin tumors] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

m-Toluidine Formula: 

CH3C6H4NH2

CAS#: 

108-44-1 

RTECS#: 

XU2800000 

IDLH: 

N.D. 

Conversion: DOT: 1708 153 

Synonyms/Trade Names: 3-Amino-1-methylbenzene, 1-Aminophenylmethane, m-Aminotoluene, 3-Methylaniline, 

3-Methylbenzenamine, 3-Toluidine, meta-Toluidine, m-Tolylamine 

Exposure Limits: 

NIOSH REL: See Appendix D 

OSHA PEL†: none 

Physical Description: Colorless to light-yellow liquid with an aromatic, amine-like 

odor. [Note: Used as a basis for many dyes.] 

Measurement Methods 

(see Table 1): 

NIOSH 2002 

OSHA 73 

Chemical & Physical Properties: 

MW: 107.2 

BP: 397°F 

Sol: 2% 

Fl.P: 187°F 

IP: 7.50 eV 

Sp.Gr: 0.999 

VP(106°F): 1 mmHg 

FRZ: -23°F 

UEL: ? 

LEL: ? 

Class IIIA Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Oxidizers, acids 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin; derm; hema, methemo; cyan, nau, vomit, low BP, 

convuls; anemia, lass 

TO: Eyes, skin, blood, CVS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 
313

T 

o-Toluidine Formula: 

CH3C6H4NH2

CAS#: 

95-53-4 

RTECS#: 

XU2975000 

IDLH: 

Ca [50 ppm] 

Conversion: 1 ppm = 4.38 mg/m3 DOT: 1708 153 

Synonyms/Trade Names: o-Aminotoluene, 2-Aminotoluene, 1-Methyl-2-aminobenzene, o-Methylaniline, 

2-Methylaniline, ortho-Toluidine, o-Tolylamine 

Exposure Limits: 

NIOSH REL: Ca [skin] 

 See Appendix A 

OSHA PEL: TWA 5 ppm (22 mg/m3

) [skin] 

Measurement Methods 

(see Table 1): 

NIOSH 2002, 2017, 8317 

OSHA 73 

Physical Description: Colorless to pale-yellow liquid with an aromatic, aniline-like odor. 

Chemical & Physical Properties: 

MW: 107.2 

BP: 392°F 

Sol: 2% 

Fl.P: 185°F 

IP: 7.44 eV 

Sp.Gr: 1.01 

VP: 0.3 mmHg 

FRZ: 6°F 

UEL: ? 

LEL: ? 

Class IIIA Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, nitric acid, bases 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes; anoxia, head, cyan; lass, dizz, drow; micro hema; 

eye burns; derm; [carc] 

TO: Eyes, skin, blood, kidneys, liver, CVS [bladder cancer] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

p-Toluidine Formula: 

CH3C6H4NH2

CAS#: 

106-49-0 

RTECS#: 

XU3150000 

IDLH: 

Ca [N.D.] 

Conversion: DOT: 1708 153 

Synonyms/Trade Names: 4-Aminotoluene, 4-Methylaniline, 4-Methylbenzenamine, 4-Toluidine, para-Toluidine, 

p-Tolylamine 

Exposure Limits: 

NIOSH REL: Ca 

 See Appendix A 

OSHA PEL†: none 

Physical Description: White solid with an aromatic odor. 

[Note: Used as a basis for many dyes.] 

Measurement Methods 

(see Table 1): 

NIOSH 2002 

OSHA 73 

Chemical & Physical 

Properties: 

MW: 107.2 

BP: 393°F 

Sol: 0.7% 

Fl.P: 188°F 

IP: 7.50 eV 

Sp.Gr: 1.05 

VP(108°F): 1 mmHg 

MLT: 111°F 

UEL: ? 

LEL: ? 

Combustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam/Daily 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Incompatibilities and Reactivities: Oxidizers, acids 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin; derm; hema, methemo; cyan, nau, vomit, low BP, 

convuls; anemia, lass; [carc] 

TO: Eyes, skin, blood, CVS [in animals: liver tumors] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 
314

T 

Tributyl phosphate Formula: 

(CH3[CH2]3O)3PO

CAS#: 

126-73-8 

RTECS#: 

TC7700000 

IDLH: 

30 ppm 

Conversion: 1 ppm = 10.89 mg/m3 DOT: 

Synonyms/Trade Names: Butyl phosphate, TBP, Tributyl ester of phosphoric acid, Tri-n-butyl phosphate 

Exposure Limits: 

NIOSH REL: TWA 0.2 ppm (2.5 mg/m3

) 

OSHA PEL†: TWA 5 mg/m3

Physical Description: Colorless to pale-yellow, odorless liquid. 

Measurement Methods 

(see Table 1): 

NIOSH 5034 

Chemical & Physical Properties: 

MW: 266.3 

BP: 552°F (Decomposes) 

Sol: 0.6% 

Fl.P(oc): 295°F 

IP: ? 

Sp.Gr: 0.98 

VP(77°F): 0.004 mmHg 

FRZ: -112°F 

UEL: ? 

LEL: ? 

Class IIIB Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

2 ppm: Sa 

5 ppm: Sa:Cf 

10 ppm: ScbaF/SaF 

30 ppm: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Incompatibilities and Reactivities: Alkalis, oxidizers, water, moist air 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, resp sys, head; nau 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 

Trichloroacetic acid Formula: 

CCl3COOH 

CAS#: 

76-03-9 

RTECS#: 

AJ7875000 

IDLH: 

N.D. 

Conversion: 1 ppm = 6.68 mg/m3 DOT: 1839 153 (solid); 2564 153 (solution) 

Synonyms/Trade Names: TCA, Trichloroethanoic acid 

Exposure Limits: 

NIOSH REL: TWA 1 ppm (7 mg/m3

) 

OSHA PEL†: none 

Physical Description: Colorless to white, crystalline solid with a sharp, pungent odor. 

Measurement Methods 

(see Table 1): 

OSHA PV2017 

Chemical & Physical Properties: 

MW: 163.4 

BP: 388°F 

Sol: Miscible 

Fl.P: NA 

IP: ? 

Sp.Gr: 1.62 

VP(124°F): 1 mmHg 

MLT: 136°F 

UEL: NA 

LEL: NA 

Noncombustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Moisture, iron, zinc, aluminum, strong oxidizers 

[Note: Decomposes on heating to form phosgene & hydrogen chloride. Corrosive to metals.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, nose, throat, resp sys; cough, dysp, delayed 

pulm edema; eye, skin burns; derm; salv, vomit, diarr 

TO: Eyes, skin, resp sys, GI tract 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 
315

T 

1,2,4-Trichlorobenzene Formula: 

C6H3Cl3

CAS#: 

120-82-1 

RTECS#: 

DC2100000 

IDLH: 

N.D. 

Conversion: 1 ppm = 7.42 mg/m3 DOT: 2321 153 (liquid) 

Synonyms/Trade Names: unsym-Trichlorobenzene; 1,2,4-Trichlorobenzol 

Exposure Limits: 

NIOSH REL: C 5 ppm (40 mg/m3

) 

OSHA PEL†: none 

Physical Description: Colorless liquid or crystalline solid (below 63°F) with an 

aromatic odor. 

Measurement Methods 

(see Table 1): 

NIOSH 5517 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Chemical & Physical Properties: 

MW: 181.4 

BP: 416°F 

Sol: 0.003% 

Fl.P: 222°F 

IP: ? 

Sp.Gr: 1.45 

VP: 1 mmHg 

FRZ: 63°F 

UEL(302°F): 6.6% 

LEL(302°F): 2.5% 

Class IIIB Combustible Liquid 

Combustible Solid Incompatibilities and Reactivities: Acids, acid fumes, oxidizers, steam 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, muc memb; in animals: liver, kidney damage; 

possible terato effects 

TO: Eyes, skin, resp sys, liver, repro sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash 

Breath: Resp support 

Swallow: Medical attention immed 

1,1,2-Trichloroethane Formula: 

CHCl2CH2Cl 

CAS#: 

79-00-5 

RTECS#: 

KJ3150000 

IDLH: 

Ca [100 ppm] 

Conversion: 1 ppm = 5.46 mg/m3 DOT: 

Synonyms/Trade Names: Ethane trichloride, β-Trichloroethane, Vinyl trichloride 

Exposure Limits: 

NIOSH REL: Ca 

 TWA 10 ppm (45 mg/m3

) [skin] 

 See Appendix A 

 See Appendix C (Chloroethanes) 

OSHA PEL: TWA 10 ppm (45 mg/m3

) [skin] 

Physical Description: Colorless liquid with a sweet, chloroform-like odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1003 

OSHA 11 

Chemical & Physical Properties: 

MW: 133.4 

BP: 237°F 

Sol: 0.4% 

Fl.P: ? 

IP: 11.00 eV 

Sp.Gr: 1.44 

VP: 19 mmHg 

FRZ: -34°F 

UEL: 15.5% 

LEL: 6% 

Combustible Liquid, forms dense 

soot. 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers & caustics; chemically-active metals (such as aluminum, 

magnesium powders, sodium & potassium) 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, nose; CNS depres; liver, kidney damage; derm; [carc] 

TO: Eyes, resp sys, CNS, liver, kidneys [in animals: liver cancer] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 
316

T 

Trichloroethylene Formula: 

ClCH=CCl2

CAS#: 

79-01-6 

RTECS#: 

KX4550000 

IDLH: 

Ca [1000 ppm]

Conversion: 1 ppm = 5.37 mg/m3 DOT: 1710 160 

Synonyms/Trade Names: Ethylene trichloride, TCE, Trichloroethene, Trilene 

Exposure Limits: 

NIOSH REL: Ca 

 See Appendix A 

 See Appendix C 

OSHA PEL†: TWA 100 ppm 

 C 200 ppm 

 300 ppm (5-minute maximum peak in any 2 hours) 

Physical Description: Colorless liquid (unless dyed blue) with a chloroform-like odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1022, 3800 

OSHA 1001 

Chemical & Physical Properties: 

MW: 131.4 

BP: 189°F 

Sol: 0.1% 

Fl.P: ? 

IP: 9.45 eV 

Sp.Gr: 1.46 

VP: 58 mmHg 

FRZ: -99°F 

UEL(77°F): 10.5% 

LEL(77°F): 8% 

Combustible Liquid, but burns with 

difficulty. 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong caustics & alkalis; chemically-active metals (such as barium, lithium, 

sodium, magnesium, titanium & beryllium) 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin; head, vis dist, lass, dizz, tremor, drow, nau, 

vomit; derm; card arrhy, pares; liver inj; [carc] 

TO: Eyes, skin, resp sys, heart, liver, kidneys, CNS [in animals: 

liver & kidney cancer] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 

Trichloronaphthalene Formula: 

C10H5Cl3

CAS#: 

1321-65-9 

RTECS#: 

QK4025000 

IDLH: 

See Appendix F 

Conversion: DOT: 

Synonyms/Trade Names: Halowax®, Nibren wax, Seekay wax 

Exposure Limits: 

NIOSH REL: TWA 5 mg/m3

 [skin] 

OSHA PEL: TWA 5 mg/m3

 [skin] 

Physical Description: Colorless to pale-yellow solid with an aromatic odor. 

Measurement Methods 

(see Table 1): 

NIOSH S128 (II-2) 

Chemical & Physical Properties: 

MW: 231.5 

BP: 579-669°F 

Sol: Insoluble 

Fl.P(oc): 392°F 

IP: ? 

Sp.Gr: 1.58 

VP: <1 mmHg 

MLT: 199°F 

UEL: ? 

LEL: ? 

Combustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

50 mg/m3

: ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

See Appendix F 

Incompatibilities and Reactivities: Strong oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Anor, nau; dizz; jaun, liver inj 

TO: Liver 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash 

Breath: Resp support 

Swallow: Medical attention immed 
317

T 

1,2,3-Trichloropropane Formula: 

CH2ClCHClCH2Cl 

CAS#: 

96-18-4 

RTECS#: 

TZ9275000 

IDLH: 

Ca [100 ppm] 

Conversion: 1 ppm = 6.03 mg/m3 DOT: 

Synonyms/Trade Names: Allyl trichloride, Glycerol trichlorohydrin, Glyceryl trichlorohydrin, Trichlorohydrin 

Exposure Limits: 

NIOSH REL: Ca 

 TWA 10 ppm (60 mg/m3

) [skin] 

 See Appendix A 

OSHA PEL†: TWA 50 ppm (300 mg/m3

) 

Physical Description: Colorless liquid with a chloroform-like odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1003 

OSHA 7 

Chemical & Physical Properties: 

MW: 147.4 

BP: 314°F 

Sol: 0.1% 

Fl.P: 160°F 

IP: ? 

Sp.Gr: 1.39 

VP: 3 mmHg 

FRZ: 6°F 

UEL(302°F): 12.6% 

LEL(248°F): 3.2% 

Class IIIA Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Chemically-active metals, strong caustics & oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, nose, throat; CNS depres; in animals: liver, kidney inj; [carc]

TO: Eyes, skin, resp sys, CNS, liver, kidneys [in animals: forestomach, 

liver & mammary gland cancer] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash 

Breath: Resp support 

Swallow: Medical attention immed 

1,1,2-Trichloro-1,2,2-trifluoroethane Formula: 

CCl2FCClF2

CAS#: 

76-13-1 

RTECS#: 

KJ4000000 

IDLH: 

2000 ppm 

Conversion: 1 ppm = 7.67 mg/m3 DOT: 

Synonyms/Trade Names: Chlorofluorocarbon-113, CFC-113, Freon® 113, Genetron® 113, Halocarbon 113, 

Refrigerant 113, TTE 

Exposure Limits: 

NIOSH REL: TWA 1000 ppm (7600 mg/m3

) 

 ST 1250 ppm (9500 mg/m3

) 

OSHA PEL†: TWA 1000 ppm (7600 mg/m3

) 

Physical Description: Colorless to water-white liquid with an odor like carbon 

tetrachloride at high concentrations. [Note: A gas above 118°F.] 

Measurement Methods 

(see Table 1): 

NIOSH 1020 

OSHA 113 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

2000 ppm: Sa/ScbaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Chemical & Physical Properties: 

MW: 187.4 

BP: 118°F 

Sol(77°F): 0.02% 

Fl.P: ? 

IP: 11.99 eV 

Sp.Gr(77°F): 1.56 

VP: 285 mmHg 

FRZ: -31°F 

UEL: ? 

LEL: ? 

Noncombustible Liquid at ordinary 

temperatures, but the gas will ignite 

and burn weakly at 1256°F. 

Incompatibilities and Reactivities: Chemically-active metals such as 

calcium, powdered aluminum, zinc, magnesium & beryllium 

[Note: Decomposes if in contact with alloys containing >2% magnesium.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit skin, throat, drow, derm; CNS depres; in animals: card 

arrhy, narco 

TO: Skin, heart, CNS, CVS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 
318

T 

Triethylamine Formula: 

(C2H5)3N 

CAS#: 

121-44-8 

RTECS#: 

YE0175000 

IDLH: 

200 ppm 

Conversion: 1 ppm = 4.14 mg/m3 DOT: 1296 132 

Synonyms/Trade Names: TEA 

Exposure Limits: 

NIOSH REL: See Appendix D 

OSHA PEL†: TWA 25 ppm (100 mg/m3

) 

Physical Description: Colorless liquid with a strong, ammonia-like odor. 

Measurement Methods 

(see Table 1): 

NIOSH S152 (II-3) 

OSHA PV2060 

Chemical & Physical Properties: 

MW: 101.2 

BP: 193°F 

Sol: 2% 

Fl.P: 20°F 

IP: 7.50 eV 

Sp.Gr: 0.73 

VP: 54 mmHg 

FRZ: -175°F 

UEL: 8.0% 

LEL: 1.2% 

Class IB Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Provide: Eyewash (>1%) 

 Quick drench (>1%) 

Respirator Recommendations 

(see Tables 3 and 4): 

OSHA 

200 ppm: Sa:Cf£/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFS/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, strong acids, chlorine, hypochlorite, halogenated compounds 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, resp sys; in animals: myocardial, kidney, liver damage 

TO: Eyes, skin, resp sys, CVS, liver, kidneys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

Trifluorobromomethane Formula: 

CBrF3

CAS#: 

75-63-8 

RTECS#: 

PA5425000 

IDLH: 

40,000 ppm 

Conversion: 1 ppm = 6.09 mg/m3 DOT: 1009 126 

Synonyms/Trade Names: Bromotrifluoromethane, Fluorocarbon 1301, Freon® 13B1, Halocarbon 13B1, 

Halon® 1301, Monobromotrifluoromethane, Refrigerant 13B1, Trifluoromonobromomethane 

Exposure Limits: 

NIOSH REL: TWA 1000 ppm (6100 mg/m3

) 

OSHA PEL: TWA 1000 ppm (6100 mg/m3

) 

Physical Description: Colorless, odorless gas. [Note: Shipped as a liquefied 

compressed gas.] 

Measurement Methods 

(see Table 1): 

NIOSH 1017 

Chemical & Physical 

Properties: 

MW: 148.9 

BP: -72°F 

Sol: 0.03% 

Fl.P: NA 

IP: 11.78 eV 

RGasD: 5.14 

VP: >1 atm 

FRZ: -267°F 

UEL: NA 

LEL: NA 

Nonflammable Gas 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Frostbite 

Eyes: Frostbite 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Provide: Frostbite wash 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

10,000 ppm: Sa 

25,000 ppm: Sa:Cf 

40,000 ppm: SaT:Cf/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Chemically-active metals (such as calcium, powdered aluminum, 

zinc, and magnesium) 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con (liquid) 

SY: Dizz; card arrhy; liquid: frostbite 

TO: CNS, heart 

First Aid (see Table 6): 

Eye: Frostbite 

Skin: Frostbite 

Breath: Resp support 
319

T 

Trimellitic anhydride Formula: 

C9H4O5

CAS#: 

552-30-7 

RTECS#: 

DC2050000 

IDLH: 

N.D. 

Conversion: 1 ppm = 7.86 mg/m3 DOT: 

Synonyms/Trade Names: 1,2,4-Benzenetricarboxylic anhydride; 4-Carboxyphthalic anhydride; TMA; TMAN; 

Trimellic acid anhydride [Note: TMA is also a synonym for Trimethylamine.] 

Exposure Limits: 

NIOSH REL: TWA 0.005 ppm (0.04 mg/m3

) 

 Should be handled in the workplace as an extremely toxic substance. 

OSHA PEL†: none 

Physical Description: Colorless solid. 

Measurement Methods 

(see Table 1): 

NIOSH 5036 

OSHA 98 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Chemical & Physical Properties: 

MW: 192.1 

BP: ? 

Sol: ? 

Fl.P: NA 

IP: ? 

Sp.Gr: ? 

VP: 0.000004 mmHg 

MLT: 322°F 

UEL: NA 

LEL: NA 

Combustible Solid Incompatibilities and Reactivities: None reported 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, nose, resp sys; pulm edema, resp sens; rhinitis, 

asthma, cough, wheez, dysp, mal, fever, musc aches, sneez 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash 

Breath: Resp support 

Swallow: Medical attention immed 

Trimethylamine Formula: 

(CH3)3N 

CAS#: 

75-50-3 

RTECS#: 

PA0350000 

IDLH: 

N.D. 

Conversion: 1 ppm = 2.42 mg/m3 DOT: 1083 118 (anhydrous); 1297 132 (aqueous solution) 

Synonyms/Trade Names: N,N-Dimethylmethanamine; TMA 

[Note: May be used in an aqueous solution (typically 25%, 30%, or 40% TMA.] 

Exposure Limits: 

NIOSH REL: TWA 10 ppm (24 mg/m3

) OSHA PEL†: none 

 ST 15 ppm (36 mg/m3

) 

Physical Description: Colorless gas with a fishy, amine odor. 

[Note: A liquid below 37°F. Shipped as a liquefied compressed gas.] 

Measurement Methods 

(see Table 1): 

OSHA PV2060 

Chemical & Physical Properties: 

MW: 59.1 

BP: 37°F 

Sol(86°F): 48% 

Fl.P: NA (Gas) 

 20°F (Liquid) 

IP: 7.82 eV 

RGasD: 2.09 

VP(70°F): 1454 mmHg 

FRZ: -179°F 

UEL: 11.6% 

LEL: 2.0% 

Flammable Gas 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact (liquid/solution)

 Frostbite 

Eyes: Prevent eye contact (liquid/solution)

 Frostbite 

Wash skin: When contam (solution) 

Remove: When wet (flamm) 

Change: N.R. 

Provide: Eyewash (liquid/solution) 

 Quick drench (liquid/solution) 

 Frostbite wash 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Strong oxidizers (including bromine), ethylene oxide, nitrosating agents 

(e.g., sodium nitrite), mercury, strong acids [Note: Corrosive to many metals (e.g., zinc, brass, aluminum, copper).] 

Exposure Routes, Symptoms, Target Organs 

(see Table 5): 

ER: Inh, Ing (solution), Con 

SY: Irrit eyes, skin, nose, throat, resp sys; cough, dysp, 

delayed pulm edema; blurred vision, corn nec; skin burns; 

liquid: frostbite 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed (liquid/solution)/Frostbite 

Skin: Water flush immed (liquid/solution)/Frostbite 

Breath: Resp support 

Swallow: Medical attention immed (solution) 
320

T 

1,2,3-Trimethylbenzene Formula: 

C6H3(CH3)3

CAS#: 

526-73-8 

RTECS#: 

DC3300000 

IDLH: 

N.D. 

Conversion: 1 ppm = 4.92 mg/m3 DOT: 

Synonyms/Trade Names: Hemellitol 

[Note: Hemimellitene is a mixture of the 1,2,3-isomer with up to 10% of related aromatics such as the 1,2,4-isomer.]

Exposure Limits: 

NIOSH REL: TWA 25 ppm (125 mg/m3

) 

OSHA PEL†: none 

Physical Description: Clear, colorless liquid with a distinctive, aromatic odor. 

Measurement Methods 

(see Table 1): 

OSHA PV2091 

Chemical & Physical Properties: 

MW: 120.2 

BP: 349°F 

Sol: Low 

Fl.P: ? 

IP: 8.48 eV 

Sp.Gr: 0.89 

VP(62°F): 1 mmHg 

FRZ: -14°F 

UEL: 6.6% 

LEL: 0.8% 

Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Oxidizers, nitric acid 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, nose, throat, resp sys; bron; hypochromic anemia; 

head, drow, lass, dizz, nau, inco; vomit, conf; chemical pneu (aspir liquid) 

TO: Eyes, skin, resp sys, CNS, blood 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash 

Breath: Resp support 

Swallow: Medical attention immed 

1,2,4-Trimethylbenzene Formula: 

C6H3(CH3)3

CAS#: 

95-63-6 

RTECS#: 

DC3325000 

IDLH: 

N.D. 

Conversion: 1 ppm = 4.92 mg/m3 DOT: 

Synonyms/Trade Names: Asymetrical trimethylbenzene, psi-Cumene, Pseudocumene 

[Note: Hemimellitene is a mixture of the 1,2,3-isomer with up to 10% of related aromatics such as the 1,2,4-isomer.]

Exposure Limits: 

NIOSH REL: TWA 25 ppm (125 mg/m3

) 

OSHA PEL†: none 

Physical Description: Clear, colorless liquid with a distinctive, aromatic odor. 

Measurement Methods 

(see Table 1): 

OSHA PV2091 

Chemical & Physical Properties: 

MW: 120.2 

BP: 337°F 

Sol: 0.006% 

Fl.P: 112°F 

IP: 8.27 eV 

Sp.Gr: 0.88 

VP(56°F): 1 mmHg 

FRZ: -77°F 

UEL: 6.4% 

LEL: 0.9% 

Class II Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Oxidizers, nitric acid 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, nose, throat, resp sys; bron; hypochromic anemia; head, 

drow, lass, dizz, nau, inco; vomit, conf; chemical pneu (aspir liquid) 

TO: Eyes, skin, resp sys, CNS, blood 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash 

Breath: Resp support 

Swallow: Medical attention immed 
321

T 

1,3,5-Trimethylbenzene Formula: 

C6H3(CH3)3

CAS#: 

108-67-8 

RTECS#: 

OX6825000 

IDLH: 

N.D. 

Conversion: 1 ppm = 4.92 mg/m3 DOT: 2325 129 

Synonyms/Trade Names: Mesitylene, Symmetrical trimethylbenzene, sym-Trimethylbenzene 

Exposure Limits: 

NIOSH REL: TWA 25 ppm (125 mg/m3

) 

OSHA PEL†: none 

Physical Description: Clear, colorless liquid with a distinctive, aromatic odor. 

Measurement Methods 

(see Table 1): 

OSHA PV2091 

Chemical & Physical Properties: 

MW: 120.2 

BP: 329°F 

Sol: 0.002% 

Fl.P: 122°F 

IP: 8.39 eV 

Sp.Gr: 0.86 

VP: 2 mmHg 

FRZ: -49°F 

UEL: ? 

LEL: ? 

Class II Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Oxidizers, nitric acid 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, nose, throat, resp sys; bron; hypochromic anemia; head, 

drow, lass, dizz, nau, inco; vomit, conf; chemical pneu (aspir liquid) 

TO: Eyes, skin, resp sys, CNS, blood 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash 

Breath: Resp support 

Swallow: Medical attention immed 

Trimethyl phosphite Formula: 

(CH3O)3P 

CAS#: 

121-45-9 

RTECS#: 

TH1400000 

IDLH: 

N.D. 

Conversion: 1 ppm = 5.08 mg/m3 DOT: 2329 129 

Synonyms/Trade Names: Methyl phosphite, Trimethoxyphosphine, Trimethyl ester of phosphorous acid 

Exposure Limits: 

NIOSH REL: TWA 2 ppm (10 mg/m3

) 

OSHA PEL†: none 

Physical Description: Colorless liquid with a distinctive, pungent odor. 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical Properties: 

MW: 124.1 

BP: 232°F 

Sol: Reacts 

Fl.P: 82°F 

IP: ? 

Sp.Gr: 1.05 

VP(77°F): 24 mmHg 

FRZ: -108°F 

UEL: ? 

LEL: ? 

Class IC Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Provide: Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: Magnesium perchlorate, water [Note: Reacts (hydrolyzes) with water.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, upper resp sys; derm; in animals: terato effects 

TO: Eyes, skin, resp sys, repro sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap flush immed 

Breath: Resp support 

Swallow: Medical attention immed 
322

T 

2,4,6-Trinitrotoluene Formula: 

CH3C6H2(NO2)3

CAS#: 

118-96-7 

RTECS#: 

XU0175000 

IDLH: 

500 mg/m3

Conversion: DOT: 1356 113 (wet) 

Synonyms/Trade Names: 1-Methyl-2,4,6-trinitrobenzene; TNT; Trinitrotoluene; sym-Trinitrotoluene; Trinitrotoluol 

Exposure Limits: 

NIOSH REL: TWA 0.5 mg/m3

 [skin] 

OSHA PEL†: TWA 1.5 mg/m3

 [skin] 

Physical Description: Colorless to pale-yellow, odorless solid or crushed flakes. 

Measurement Methods 

(see Table 1): 

OSHA 44 

Chemical & Physical Properties: 

MW: 227.1 

BP: 464°F (Explodes) 

Sol(77°F): 0.01% 

Fl.P: ? (Explodes) 

IP: 10.59 eV 

Sp.Gr: 1.65 

VP: 0.0002 mmHg 

MLT: 176°F 

UEL: ? 

LEL: ? 

Combustible Solid (Class A Explosive) 

Personal Protection/Sanitation

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam/Daily 

Remove: When wet or contam 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

5 mg/m3

: Sa* 

12.5 mg/m3

: Sa:Cf* 

25 mg/m3

: ScbaF/SaF 

500 mg/m3

: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, ammonia, strong alkalis, combustible materials, heat 

[Note: Rapid heating will result in detonation.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit skin, muc memb; liver damage, jaun; cyan; sneez; cough, sore 

throat; peri neur, musc pain; kidney damage; cataract; sens derm; leucyt; 

anemia; card irreg 

TO: Eyes, skin, resp sys, blood, liver, CVS, CNS, kidneys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 

Triorthocresyl phosphate Formula: 

(CH3C6H40)3PO 

CAS#: 

78-30-8 

RTECS#: 

TD0350000 

IDLH: 

40 mg/m3

Conversion: DOT: 2574 151 

Synonyms/Trade Names: TCP, TOCP, Tri-o-cresyl ester of phosphoric acid, Tri-o-cresyl phosphate 

Exposure Limits: 

NIOSH REL: TWA 0.1 mg/m3

 [skin] 

OSHA PEL†: TWA 0.1 mg/m3

Physical Description: Colorless to pale-yellow, odorless liquid or solid (below 52°F). 

Measurement Methods 

(see Table 1): 

NIOSH 5037 

Chemical & Physical Properties: 

MW: 368.4 

BP: 770°F (Decomposes) 

Sol: Slight 

Fl.P: 437°F 

IP: ? 

Sp.Gr: 1.20 

VP(77°F): 0.00002 mmHg 

FRZ: 52°F 

UEL: ? 

LEL: ? 

Class IIIB Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: N.R. 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

0.5 mg/m3

: Qm 

1 mg/m3

: 95XQ/Sa 

2.5 mg/m3

: Sa:Cf/PaprHie 

5 mg/m3

: 100F/SaT:Cf/PaprTHie/ 

 ScbaF/SaF 

40 mg/m3

: Sa:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Incompatibilities and Reactivities: Oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: GI dist; peri neur; cramps in calves, pares in feet or hands; 

weak feet, wrist drop, para 

TO: PNS, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 
323

T 

Triphenylamine Formula: 

(C6H5)3N 

CAS#: 

603-34-9 

RTECS#: 

YK2680000 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: N,N-Diphenylaniline; N,N-Diphenylbenzenamine 

Exposure Limits: 

NIOSH REL: TWA 5 mg/m3

OSHA PEL†: none 

Physical Description: Colorless solid. 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical Properties: 

MW: 245.3 

BP: 689°F 

Sol: Insoluble 

Fl.P: ? 

IP: 7.60 eV 

Sp.Gr: 0.77 

VP: ? 

MLT: 261°F 

UEL: ? 

LEL: ? 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: Daily 

Remove: N.R. 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: None reported 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: In animals: irrit skin 

TO: Skin 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash 

Breath: Resp support 

Swallow: Medical attention immed 

Triphenyl phosphate Formula: 

(C6H5O)3PO 

CAS#: 

115-86-6 

RTECS#: 

TC8400000 

IDLH: 

1000 mg/m3

Conversion: DOT: 

Synonyms/Trade Names: Phenyl phosphate, TPP, Triphenyl ester of phosphoric acid 

Exposure Limits: 

NIOSH REL: TWA 3 mg/m3

OSHA PEL: TWA 3 mg/m3

Physical Description: Colorless, crystalline powder with a phenol-like odor. 

Measurement Methods 

(see Table 1): 

NIOSH 5038 

Chemical & Physical 

Properties: 

MW: 326.3 

BP: 776°F 

Sol(129°F): 0.002% 

Fl.P: 428°F 

IP: ? 

Sp.Gr: 1.29 

VP(380°F): 1 mmHg 

MLT: 120°F 

UEL: ? 

LEL: ? 

Combustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

15 mg/m3

: Qm 

30 mg/m3

: 95XQ/Sa 

75 mg/m3

: Sa:Cf/PaprHie 

150 mg/m3

: 100F/SaT:Cf/PaprTHie/ 

 ScbaF/SaF 

1000 mg/m3

: Sa:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Incompatibilities and Reactivities: None reported 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing 

SY: Minor changes in blood enzymes; in animals: musc weak, para 

TO: Blood, PNS 

First Aid (see Table 6): 

Breath: Resp support 

Swallow: Medical attention immed 
324

T 

Tungsten Formula: 

W 

CAS#: 

7440-33-7 

RTECS#: 

YO7175000 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: Tungsten metal, Wolfram 

Exposure Limits: 

NIOSH REL*: TWA 5 mg/m3

 

 ST 10 mg/m3

 

 [*Note: The REL also applies to other insoluble tungsten compounds (as W).] 

OSHA PEL†: none 

Physical Description: Hard, brittle, steel-gray to tin-white solid. 

Measurement Methods 

(see Table 1): 

NIOSH 7074, 7300, 7301 

OSHA ID213 

Chemical & Physical Properties: 

MW: 183.9 

BP: 10,701°F 

Sol: Insoluble 

Fl.P: NA 

IP: NA 

Sp.Gr: 19.3 

VP: 0 mmHg (approx) 

MLT: 6170°F 

UEL: NA 

LEL: NA 

Combustible in the form of finely divided 

powder; may ignite spontaneously. 

Personal Protection/Sanitation

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

50 mg/m3

: 100XQ/Sa/ScbaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100XQ/ScbaE 

Incompatibilities and Reactivities: Bromine trifluoride, chlorine trifluoride, fluorine, iodine pentafluoride 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, resp sys; diffuse pulm fib; loss of appetite, 

nau, cough; blood changes 

TO: Eyes, skin, resp sys, blood 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash 

Breath: Fresh air 

Swallow: Medical attention immed 

Tungsten (soluble compounds, as W) Formula: CAS#: RTECS#: IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: Synonyms vary depending upon the specific soluble tungsten compound. 

Exposure Limits: 

NIOSH REL: TWA 1 mg/m3

 

 ST 3 mg/m3

OSHA PEL†: none 

Physical Description: Appearance and odor vary depending upon the specific soluble 

tungsten compound. 

Measurement Methods 

(see Table 1): 

NIOSH 7074, 7300, 7301 

OSHA ID213 

Chemical & Physical 

Properties: 

Properties vary depending 

upon the specific soluble 

tungsten compound. 

Personal Protection/Sanitation 

(see Table 2): 

Recommendations regarding personal 

protective clothing vary depending upon 

the specific compound. 

 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

10 mg/m3

: 100XQ/Sa 

25 mg/m3

: Sa:Cf 

50 mg/m3

: 100F/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Incompatibilities and Reactivities: Varies 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, resp sys; in animals: CNS disturbances; 

diarr; resp failure; behavioral, body weight, blood changes 

TO: Eyes, skin, resp sys, CNS, GI tract 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water wash 

Breath: Resp support 

Swallow: Medical attention immed 
325

T 

Tungsten carbide (cemented) Formula: 

WC/Co/Ni/Ti 

CAS#: 

1: 11107-01-0 

2: 12718-69-3 

3: 37329-49-0 

RTECS#: 

1: YO7350000

2: YO7525000

3: YO7700000

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: Cemented tungsten carbide, Cemented WC, Hard metal 

[Note: The tungsten carbide (WC) content is generally 85-95% & the cobalt content is generally 5-15%.] 

[1: 85% WC, 15% Co; 2: 92% WC, 8% Co; 3: 78% WC, 14% Co, 8% Ti] 

Exposure Limits: 

NIOSH REL: See Appendix C OSHA PEL†: See Appendix C 

Physical Description: A mixture of tungsten carbide, cobalt, and sometimes other 

metals & metal oxides or carbides. 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical 

Properties: 

Properties vary 

depending upon the 

specific mixture. 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam/Daily (Ni)

Remove: When wet or contam 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

0.25 mg Co/m3

: Qm 

0.5 mg Co/m3

: 95XQ*/Sa* 

1.25 mg Co/m3

: Sa:Cf*/PaprHie*/PaprHie* 

2.5 mg Co/m3

: 100F/ScbaF/SaF 

20 mg Co/m3

: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Tungsten carbide (cemented) containing Nickel: 

NIOSH

¥:ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Incompatibilities and Reactivities: Tungsten carbide: Fluorine, chlorine trifluoride, oxides of nitrogen, lead dioxide 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, resp sys; possible skin sens to cobalt, nickel; 

diffuse pulm fib; loss of appetite, nau, cough; blood changes 

TO: Eyes, skin, resp sys, blood 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash 

Breath: Fresh air 

Swallow: Medical attention immed 

Turpentine Formula: 

C10H16 (approx) 

CAS#: 

8006-64-2 

RTECS#: 

YO8400000 

IDLH: 

800 ppm 

Conversion: 1 ppm = 5.56 mg/m3 (approx) DOT: 1299 128 

Synonyms/Trade Names: Gumspirits, Gum turpentine, Spirits of turpentine, Steam distilled turpentine, 

Sulfate wood turpentine, Turps, Wood turpentine 

Exposure Limits: 

NIOSH REL: TWA 100 ppm (560 mg/m3

) 

OSHA PEL: TWA 100 ppm (560 mg/m3) 

Physical Description: Colorless liquid with a characteristic odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1551 

Personal Protection/Sanitation

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

800 ppm: Sa:Cf£/PaprOv£/CcrFOv/ 

 GmFOv/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Chemical & Physical Properties: 

MW: 136 (approx) 

BP: 309-338°F 

Sol: Insoluble 

Fl.P: 95°F 

IP: ? 

Sp.Gr: 0.86 

VP: 4 mmHg 

FRZ: -58 to -76°F 

UEL: ? 

LEL: 0.8% 

Class IC Flammable Liquid 

Incompatibilities and Reactivities: Strong oxidizers, chlorine, 

chromic anhydride, stannic chloride, chromyl chloride 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, nose, throat; head, dizz, convuls; skin sens; hema, prot; 

kidney damage; abdom pain, nau, vomit, diarr; chemical pneu (aspir liquid) 

TO: Eyes, skin, resp sys, CNS, kidneys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 
1-Undecanethiol Formula: 

CH3(CH2)10SH 

CAS#: 

5332-52-5 

RTECS#: IDLH: 

N.D. 

Conversion: 1 ppm = 7.71 mg/m3 DOT: 1228 131 

Synonyms/Trade Names: Undecyl mercaptan 

Exposure Limits: 

NIOSH REL: C 0.5 ppm (3.9 mg/m3) [15-minute] 

OSHA PEL: none 

Physical Description: Liquid. 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical Properties: 

MW: 188.4 

BP: 495°F 

Sol: Insoluble 

Fl.P: ? 

IP: ? 

Sp.Gr: 0.84 

VP: ? 

FRZ: 27°F 

UEL: ? 

LEL: ? 

Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

5 ppm: CcrOv/Sa 

12.5 ppm: Sa:Cf/PaprOv 

25 ppm: CcrFOv/GmFOv/PaprTOv/ 

 ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Oxidizers, reducing agents, strong acids & bases, alkali metals 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, resp sys; conf, dizz, head, drow, nau, vomit, 

lass, convuls 

TO: Eyes, skin, resp sys, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash 

Breath: Resp support 

Swallow: Medical attention immed 

Uranium (insoluble 

compounds, as U) 

Formula: 

U (metal) 

CAS#: 

7440-61-1 (metal) 

RTECS#: 

YR3490000 (metal) 

IDLH: 

Ca [10 mg/m3

 (as U)]

Conversion: DOT: 2979 162 (metal, pyrophoric) 

Synonyms/Trade Names: Uranium metal: Uranium I 

Synonyms of other insoluble uranium compounds vary depending upon the specific compound. 

Exposure Limits: 

NIOSH REL: Ca 

 TWA 0.2 mg/m3

 

 ST 0.6 mg/m3 

 See Appendix A 

OSHA PEL†: TWA 0.25 mg/m3

Measurement Methods 

(see Table 1): 

None available 

Physical Description: Metal: Silver-white, malleable, ductile, lustrous solid. [Note: Weakly radioactive.] 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam/Daily 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

326

U 

Chemical & Physical Properties: 

MW: 238.0 

BP: 6895°F 

Sol: Insoluble 

Fl.P: NA 

IP: NA 

Sp.Gr: 19.05 (metal) 

VP: 0 mmHg (approx) 

MLT: 2097°F 

UEL: NA 

LEL: NA 

MEC: 60 g/m3

Metal: Combustible Solid, especially 

turnings and powder. 

Incompatibilities and Reactivities: Carbon dioxide, carbon tetrachloride, 

nitric acid, fluorine [Note: Complete coverage of uranium metal scrap with 

oil is essential for prevention of fire.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Derm; kidney damage; blood changes; [carc]; in animals: lung, lymph 

node damage; [carc] Potential for cancer is a result of alpha-emitting 

properties & radioactive decay products (e.g., radon). 

TO: Skin, kidneys, bone marrow, lymphatic sys [lung cancer] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 
327

V 

Uranium (soluble compounds, as U) Formula: CAS#: RTECS#: IDLH: 

Ca [10 mg/m3

 (as U)] 

Conversion: DOT: 

Synonyms/Trade Names: Synonyms vary depending upon the specific soluble uranium compound. 

Exposure Limits: 

NIOSH REL: Ca 

 TWA 0.05 mg/m3

 

 See Appendix A 

OSHA PEL: TWA 0.05 mg/m3

Measurement Methods 

(see Table 1): 

None available 

Physical Description: Appearance and odor vary depending upon the specific soluble uranium compound. 

Chemical & Physical 

Properties: 

Properties vary depending 

upon the specific soluble 

uranium compound. 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam/Daily 

Remove: When wet or contam 

Change: Daily 

Provide: Eyewash (UF6), Quick 

drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape (Halides): GmFAg100/ScbaE 

Escape (Non-halides): 100F/ScbaE 

Incompatibilities and Reactivities: Uranyl nitrate: combustibles; Uranium hexafluoride: water 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Lac, conj; short breath, cough, chest rales; nau, vomit; skin burns; RBC, casts 

in urine; prot; high BUN; [carc] Potential for cancer is a result of alpha-emitting 

properties & radioactive decay products (e.g., radon). 

TO: Resp sys, blood, liver, kidneys, lymphatic sys, skin, bone marrow [lung cancer] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention 

 immed 

n-Valeraldehyde Formula: 

CH3(CH2)3CHO 

CAS#: 

110-62-3 

RTECS#: 

YV3600000 

IDLH: 

N.D. 

Conversion: 1 ppm = 3.53 mg/m3 DOT: 2058 129 

Synonyms/Trade Names: Amyl aldehyde, Pentanal, Valeral, Valeraldehyde, Valeric aldehyde 

Exposure Limits: 

NIOSH REL: TWA 50 ppm (175 mg/m3

) 

 See Appendix C (Aldehydes) 

OSHA PEL†: none 

Physical Description: Colorless liquid with a strong, acrid, pungent odor. 

Measurement Methods 

(see Table 1): 

NIOSH 2018, 2536 

OSHA 85 

Chemical & Physical Properties: 

MW: 86.2 

BP: 217°F 

Sol: Slight 

Fl.P: 54°F 

IP: 9.82 eV 

Sp.Gr: 0.81 

VP: 26 mmHg 

FRZ: -133°F 

UEL: ? 

LEL: ? 

Class IB Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: None reported 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, nose, throat 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap flush immed 

Breath: Resp support 

Swallow: Medical attention immed 
328

V 

Vanadium dust Formula: 

V2O5

CAS#: 

1314-62-1 

RTECS#: 

YW2450000 

IDLH: 

35 mg/m3

 (as V) 

Conversion: DOT: 2862 151 

Synonyms/Trade Names: Divanadium pentoxide dust, Vanadic anhydride dust, Vanadium oxide dust, 

Vanadium pentaoxide dust. Other synonyms vary depending upon the specific vanadium compound. 

Exposure Limits: 

NIOSH REL*: C 0.05 mg V/m3

 [15-minute] 

[*Note: The REL applies to all vanadium compounds except Vanadium metal and 

Vanadium carbide (see Ferrovanadium dust).] 

OSHA PEL†: C 0.5 mg V2O5/m3

 (resp) 

Measurement Methods 

(see Table 1): 

NIOSH 7300, 7301, 7303, 

 7504, 9102 

OSHA ID185 

Physical Description: Yellow-orange powder or dark-gray, odorless flakes dispersed in air. 

Chemical & Physical Properties: 

MW: 181.9 

BP: 3182°F (Decomposes) 

Sol: 0.8% 

Fl.P: NA 

IP: NA 

Sp.Gr: 3.36 

VP: 0 mmHg (approx) 

MLT: 1274°F 

UEL: NA 

LEL: NA 

Noncombustible Solid, but may 

increase intensity of fire when in 

contact with combustible materials. 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH (as V) 

0.5 mg/m3

: 100XQ*/Sa* 

1.25 mg/m3

: Sa:Cf*/PaprHie* 

2.5 mg/m3

: 100F/PaprTHie*/ScbaF/SaF 

35 mg/m3

: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Incompatibilities and Reactivities: Lithium, chlorine trifluoride 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, throat; green tongue, metallic taste, eczema; 

cough; fine rales, wheez, bron, dysp 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 

Vanadium fume Formula: 

V2O5

CAS#: 

1314-62-1 

RTECS#: 

YW2460000 

IDLH: 

35 mg/m3

 (as V) 

Conversion: DOT: 2862 151 

Synonyms/Trade Names: Divanadium pentoxide fume, Vanadic anhydride fume, Vanadium oxide fume, 

Vanadium pentaoxide fume. Other synonyms vary depending upon the specific vanadium compound. 

Exposure Limits: 

NIOSH REL: C 0.05 mg V/m3

 [15-minute] 

OSHA PEL†: C 0.1 mg V2O5/m3

Physical Description: Finely divided particulate dispersed in air. 

Measurement Methods 

(see Table 1): 

NIOSH 7300, 7301, 7303, 7504 

OSHA ID185 

Chemical & Physical 

Properties: 

MW: 181.9 

BP: 3182°F (Decomposes) 

Sol: 0.8% 

Fl.P: NA 

IP: NA 

Sp.Gr: 3.36 

VP: 0 mmHg (approx) 

MLT: 1274°F 

UEL: NA 

LEL: NA 

Noncombustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH (as V) 

0.5 mg/m3

: 100XQ*/Sa* 

1.25 mg/m3

: Sa:Cf*/PaprHie* 

2.5 mg/m3

: 100F/PaprTHie*/ScbaF/SaF 

35 mg/m3

: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Incompatibilities and Reactivities: Lithium, chlorine trifluoride 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con 

SY: Irrit eyes, throat; green tongue, metallic taste; cough, fine rales, 

wheez, bron, dysp; eczema 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Breath: Resp support 
329

V 

Vegetable oil mist Formula: CAS#: 

68956-68-3 

RTECS#: 

YX1850000 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: Vegetable mist 

Exposure Limits: 

NIOSH REL: TWA 10 mg/m3

 (total) 

 TWA 5 mg/m3

 (resp) 

OSHA PEL: TWA 15 mg/m3

 (total) 

 TWA 5 mg/m3

 (resp) 

Measurement Methods 

(see Table 1): 

NIOSH 0500, 0600 

Physical Description: An oil extracted from the seeds, fruit, or nuts of vegetables or other plant matter. 

Chemical & Physical Properties: 

MW: varies 

BP: ? 

Sol: Insoluble 

Fl.P: 323-540°F 

IP: ? 

Sp.Gr: 0.91-0.95 

VP: ? 

FRZ: ? 

UEL: ? 

LEL: ? 

Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: None reported 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con 

SY: Irrit eyes, skin, resp sys; lac 

TO: Eyes, skin, resp sys Determine based on working conditions 

First Aid (see Table 6): 

Eye: Irr immed 

Breath: Fresh air 

Vinyl acetate Formula: 

CH2=CHOOCCH3

CAS#: 

108-05-4 

RTECS#: 

AK0875000 

IDLH: 

N.D. 

Conversion: 1 ppm = 3.52 mg/m3 DOT: 1301 129P 

Synonyms/Trade Names: 1-Acetoxyethylene, Ethenyl acetate, Ethenyl ethanoate, VAC, Vinyl acetate monomer, 

Vinyl ethanoate 

Exposure Limits: 

NIOSH REL: C 4 ppm (15 mg/m3

) [15-minute] 

OSHA PEL†: none 

Physical Description: Colorless liquid with a pleasant, fruity odor. 

[Note: Raw material for many polyvinyl resins.] 

Measurement Methods 

(see Table 1): 

NIOSH 1453 

OSHA 51 

Chemical & Physical 

Properties: 

MW: 86.1 

BP: 162°F 

Sol: 2% 

Fl.P: 18°F 

IP: 9.19 eV 

Sp.Gr: 0.93 

VP: 83 mmHg 

FRZ: -136°F 

UEL: 13.4% 

LEL: 2.6% 

Class IB Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

40 ppm: CcrOv*/Sa* 

100 ppm: Sa:Cf*/PaprOv* 

200 ppm: CcrFOv/GmFOv/PaprTOv*/ 

 ScbaF/SaF 

4000 ppm: Sa:Pd,Pp* 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Acids, bases, silica gel, alumina, oxidizers, azo compounds, ozone 

[Note: Usually contains a stabilizer (e.g., hydroquinone or diphenylamine) to prevent polymerization.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, nose, throat; hoarseness, cough; loss of smell; eye 

burns, skin blisters 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap flush immed 

Breath: Resp support 

Swallow: Medical attention immed 
330

V 

Vinyl bromide Formula: 

CH2=CHBr 

CAS#: 

593-60-2 

RTECS#: 

KU8400000 

IDLH: 

Ca [N.D.] 

Conversion: 1 ppm = 4.38 mg/m3 DOT: 1085 116P (inhibited) 

Synonyms/Trade Names: Bromoethene, Bromoethylene, Monobromoethylene 

Exposure Limits: 

NIOSH REL: Ca 

 See Appendix A 

OSHA PEL†: none 

Measurement Methods 

(see Table 1): 

NIOSH 1009 

OSHA 8 

Physical Description: Colorless gas or liquid (below 60°F) with a pleasant odor. 

[Note: Shipped as a liquefied compressed gas with 0.1% phenol added to prevent polymerization.] 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact (liquid) 

Eyes: Prevent eye contact (liquid) 

Wash skin: When contam (liquid) 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Chemical & Physical Properties: 

MW: 107.0 

BP: 60°F 

Sol: Insoluble 

Fl.P: NA (Gas) 

IP: 9.80 eV 

RGasD: 3.79 

Sp.Gr: 1.49 (Liquid at 60°F) 

VP: 1.4 atm 

FRZ: -219°F 

UEL: 15% 

LEL: 9% 

Flammable Gas 

Incompatibilities and Reactivities: Strong oxidizers (e.g., perchlorates, 

peroxides, chlorates, permanganates & nitrates.) 

[Note: May polymerize in sunlight.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing (liquid), Con 

SY: Irrit eyes, skin; dizz, conf, inco, narco, nau, vomit; liquid: 

frostbite; [carc] 

TO: Eyes, skin, CNS, liver [in animals: liver & lymph node tumors] 

First Aid (see Table 6): 

Eye: Irr immed (liquid) 

Skin: Water flush immed (liquid) 

Breath: Resp support 

Swallow: Medical attention immed (liquid) 

Vinyl chloride Formula: 

CH2=CHCl 

CAS#: 

75-01-4 

RTECS#: 

KU9625000 

IDLH: 

Ca [N.D.] 

Conversion: 1 ppm = 2.56 mg/m3 DOT: 1086 116P (inhibited) 

Synonyms/Trade Names: Chloroethene, Chloroethylene, Ethylene monochloride, Monochloroethene, 

Monochloroethylene, VC, Vinyl chloride monomer (VCM) 

Exposure Limits: 

NIOSH REL: Ca 

 See Appendix A 

OSHA PEL: [1910.1017] TWA 1 ppm 

C 5 ppm [15-minute] 

Measurement Methods 

(see Table 1): 

NIOSH 1007 

OSHA 4, 75 

Physical Description: Colorless gas or liquid (below 7°F) with a pleasant odor at high concentrations. 

[Note: Shipped as a liquefied compressed gas.] 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Frostbite 

Eyes: Frostbite 

Wash skin: N.R. 

Remove: When wet (flamm) 

Change: N.R. 

Provide: Frostbite wash 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFS/ScbaE 

See Appendix E (page 351) 

Chemical & Physical Properties: 

MW: 62.5 

BP: 7°F 

Sol(77°F): 0.1% 

Fl.P: NA (Gas) 

IP: 9.99 eV 

RGasD: 2.21 

VP: 3.3 atm 

FRZ: -256°F 

UEL: 33.0% 

LEL: 3.6% 

Flammable Gas 

Incompatibilities and Reactivities: Copper, oxidizers, aluminum, peroxides, 

iron, steel [Note: Polymerizes in air, sunlight, or heat unless stabilized 

by inhibitors such as phenol. Attacks iron & steel in presence of moisture.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con (liquid) 

SY: Lass; abdom pain, GI bleeding; enlarged liver; pallor or cyan 

of extremities; liquid: frostbite; [carc] 

TO: Liver, CNS, blood, resp sys, lymphatic sys [liver cancer] 

First Aid (see Table 6): 

Eye: Frostbite 

Skin: Frostbite 

Breath: Resp support 
331

V 

Vinyl cyclohexene dioxide Formula: 

C8H12O2

CAS#: 

106-87-6 

RTECS#: 

RN8640000 

IDLH: 

Ca [N.D.] 

Conversion: 1 ppm = 5.73 mg/m3 DOT: 

Synonyms/Trade Names: 1-Epoxyethyl-3,4-epoxy-cyclohexane; 4-Vinylcyclohexene diepoxide; 

4-Vinyl-1-cyclohexene dioxide 

Exposure Limits: 

NIOSH REL: Ca 

 TWA 10 ppm (60 mg/m3

) [skin] 

 See Appendix A 

OSHA PEL†: none 

Physical Description: Colorless liquid. 

Measurement Methods 

(see Table 1): 

OSHA PV2083 

Chemical & Physical Properties: 

MW: 140.2 

BP: 441°F 

Sol: High 

Fl.P(oc): 230°F 

IP: ? 

Sp.Gr: 1.10 

VP: 0.1 mmHg 

FRZ: -164°F 

UEL: ? 

LEL: ? 

Class IIIB Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Alcohols, amines, water [Note: Slowly hydrolyzes in water.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: In animals: irrit eyes, skin, resp sys; testicular atrophy; leupen, nec 

thymus; skin sens; [carc] 

TO: Eyes, skin, resp sys, blood, thymus, repro sys [in animals: skin tumors] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water wash immed 

Breath: Resp support 

Swallow: Medical attention immed 

Vinyl fluoride Formula: 

CH2=CHF 

CAS#: 

75-02-5 

RTECS#: 

YZ3510000 

IDLH: 

N.D. 

Conversion: 1 ppm = 1.89 mg/m3 DOT: 1860 116P (inhibited) 

Synonyms/Trade Names: Fluoroethene, Fluoroethylene, Monofluoroethylene, Vinyl fluoride monomer 

Exposure Limits: 

NIOSH REL: TWA 1 ppm 

 C 5 ppm [use 1910.1017] 

OSHA PEL: none 

Physical Description: Colorless gas with a faint, ethereal odor. 

[Note: Shipped as a liquefied compressed gas.] 

Measurement Methods 

(see Table 1): 

None available 

Chemical & Physical 

Properties: 

MW: 46.1 

BP: -98°F 

Sol: Insoluble 

Fl.P: NA (Gas) 

IP: 10.37 eV 

RGasD: 1.60 

VP: 25.2 atm 

FRZ: -257°F 

UEL: 21.7% 

LEL: 2.6% 

Flammable Gas 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Frostbite 

Eyes: Frostbite 

Wash skin: N.R. 

Remove: When wet (flamm) 

Change: N.R. 

Provide: Frostbite wash 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

10 ppm: CcrOv/Sa 

25 ppm: Sa:Cf/PaprOv 

50 ppm: CcrFOv/GmFOv/PaprTOv/ 

 ScbaF/SaF 

200 ppm: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: None reported [Note: Inhibited with 0.2% terpenes to prevent polymerization.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con (liquid) 

SY: Head, dizz, conf, inco, narco, nau, vomit; liquid: frostbite 

TO: CNS 

First Aid (see Table 6): 

Eye: Frostbite 

Skin: Frostbite 

Breath: Resp support 
332

V 

Vinylidene chloride Formula: 

CH2=CCl2

CAS#: 

75-35-4 

RTECS#: 

KV9275000 

IDLH: 

Ca [N.D.] 

Conversion: DOT: 1303 130P (inhibited) 

Synonyms/Trade Names: 1,1-DCE; 1,1-Dichloroethene; 1,1-Dichloroethylene; VDC; Vinylidene chloride 

monomer; Vinylidene dichloride 

Exposure Limits: 

NIOSH REL: Ca 

 See Appendix A 

OSHA PEL†: none 

Measurement Methods 

(see Table 1): 

NIOSH 1015 

OSHA 19 

Physical Description: Colorless liquid or gas (above 89°F) with a mild, sweet, chloroform-like odor. 

Chemical & Physical Properties: 

MW: 96.9 

BP: 89°F 

Sol: 0.04% 

Fl.P: -2°F 

IP: 10.00 eV 

Sp.Gr: 1.21 

VP: 500 mmHg 

FRZ: -189°F 

UEL: 15.5% 

LEL: 6.5% 

Class IA Flammable Liquid 

Personal Protection/Sanitation

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Aluminum, sunlight, air, copper, heat 

[Note: Polymerization may occur if exposed to oxidizers, chlorosulfonic acid, nitric acid, or oleum. Inhibitors 

such as the monomethyl ether of hydroquinone are added to prevent polymerization.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, throat; dizz, head, nau, dysp; liver, kidney dist; pneu; 

[carc] 

TO: Eyes, skin, resp sys, CNS, liver, kidneys [in animals: liver & kidney 

tumors] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

Vinylidene fluoride Formula: 

CH2=CF2

CAS#: 

75-38-7 

RTECS#: 

KW0560000 

IDLH: 

N.D. 

Conversion: 1 ppm = 2.62 mg/m3 DOT: 1959 116P 

Synonyms/Trade Names: Difluoro-1,1-ethylene; 1,1-Difluoroethene; 1,1-Difluoroethylene; Halocarbon 1132A; 

VDF; Vinylidene difluoride 

Exposure Limits: 

NIOSH REL: TWA 1 ppm 

 C 5 ppm [use 1910.1017] 

OSHA PEL: none 

Measurement Methods 

(see Table 1): 

NIOSH 3800 

Physical Description: Colorless gas with a faint, ethereal odor. [Note: Shipped as a liquefied compressed gas.] 

Chemical & Physical Properties: 

MW: 64.0 

BP: -122°F 

Sol: Insoluble 

Fl.P: NA (Gas) 

IP: 10.29 eV 

RGasD: 2.21 

VP: 35.2 atm 

FRZ: -227°F 

UEL: 21.3% 

LEL: 5.5% 

Flammable Gas 

Personal Protection/Sanitation

(see Table 2): 

Skin: Frostbite 

Eyes: Frostbite 

Wash skin: N.R. 

Remove: When wet (flamm) 

Change: N.R. 

Provide: Frostbite wash 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

10 ppm: CcrOv/Sa 

25 ppm: Sa:Cf/PaprOv 

50 ppm: CcrFOv/GmFOv/PaprTOv/ 

 ScbaF/SaF 

200 ppm: SaF:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Oxidizers, aluminum chloride 

[Note: Violent reaction with hydrogen chloride when heated under pressure.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con (liquid) 

SY: Dizz, head, nau; liquid: frostbite 

TO: CNS 

First Aid (see Table 6): 

Eye: Frostbite 

Skin: Frostbite 

Breath: Resp support 
333

V 

Vinyl toluene Formula: 

CH2=CHC6H4CH3

CAS#: 

25013-15-4 (inhibited) 

RTECS#: 

WL5075000 

IDLH: 

400 ppm 

Conversion: 1 ppm = 4.83 mg/m3 DOT: 2618 130P (inhibited) 

Synonyms/Trade Names: Ethenylmethylbenzene, Methylstyrene, Tolyethylene 

Exposure Limits: 

NIOSH REL: TWA 100 ppm (480 mg/m3

) 

OSHA PEL: TWA 100 ppm (480 mg/m3

) 

Physical Description: Colorless liquid with a strong, disagreeable odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1501 

OSHA 7 

Chemical & Physical Properties: 

MW: 118.2 

BP: 339°F 

Sol: 0.009% 

Fl.P: 127°F 

IP: 8.20 eV 

Sp.Gr: 0.89 

VP: 1 mmHg 

FRZ: -106°F 

UEL: 11.0% 

LEL: 0.8% 

Class II Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

400 ppm: CcrOv*/PaprOv*/ 

 GmFOv/Sa*/ScbaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Oxidizers, peroxides, strong acids, iron or aluminum salts 

[Note: Usually inhibited with tert-butyl catechol to prevent polymerization.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, upper resp sys; drow; in animals: narco 

TO: Eyes, skin, resp sys, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap flush prompt 

Breath: Resp support 

Swallow: Medical attention immed 

VM & P Naphtha Formula: CAS#: 

8032-32-4 

RTECS#: 

OI6180000 

IDLH: 

N.D. 

Conversion: DOT: 1268 128 (petroleum distillates, n.o.s.) 

Synonyms/Trade Names: Ligroin, Painters naphtha, Petroleum ether, Petroleum spirit, Refined solvent naphtha, 

Varnish makers' & painters' naphtha 

Exposure Limits: 

NIOSH REL: TWA 350 mg/m3

 

 C 1800 mg/m3

 [15-minute] 

OSHA PEL†: none 

Physical Description: Clear to yellowish liquid with a pleasant, aromatic odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1550 

OSHA 48 

Chemical & Physical 

Properties: 

MW: 87-114 (approx) 

BP: 203-320°F 

Sol: Insoluble 

Fl.P: 20-55°F 

IP: ? 

Sp.Gr(60°F): 0.73-0.76 

VP: 2-20 mmHg 

FRZ: ? 

UEL: 6.0% 

LEL: 1.2% 

Class IB Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

3500 mg/m3

: CcrOv/Sa 

8750 mg/m3

: Sa:Cf/PaprOv 

17,500 mg/m3

: CcrFOv/GmFOv/PaprTOv/ 

 ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: None reported 

[Note: VM&P Naphtha is a refined petroleum solvent predominantly C7-C11 which is typically 55% paraffins, 

30% monocycloparaffins, 2% dicycloparaffins & 12% alklybenzenes.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, upper resp sys; derm; CNS depres; chemical pneu 

(aspir liquid) 

TO: Eyes, skin, resp sys, CNS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 
334

W 

Warfarin Formula: 

C19H16O4

CAS#: 

81-81-2 

RTECS#: 

GN4550000 

IDLH: 

100 mg/m3

Conversion: DOT: 

Synonyms/Trade Names: 3-(α-Acetonyl)-benzyl-4-hydroxycoumarin; 

4-Hydroxy-3-(3-oxo-1-phenyl butyl)-2H-1-benzopyran-2-one; WARF 

Exposure Limits: 

NIOSH REL: TWA 0.1 mg/m3

OSHA PEL: TWA 0.1 mg/m3

Physical Description: Colorless, odorless, crystalline powder. [rodenticide] 

Measurement Methods 

(see Table 1): 

NIOSH 5002 

Chemical & Physical Properties: 

MW: 308.3 

BP: Decomposes 

Sol: 0.002% 

Fl.P: ? 

IP: ? 

Sp.Gr: ? 

VP(71°F): 0.09 mmHg 

MLT: 322°F 

UEL: ? 

LEL: ? 

Combustible Solid 

Personal Protection/Sanitation

(see Table 2): 

Skin: Prevent skin contact 

Eyes: N.R. 

Wash skin: When contam 

Remove: When wet or contam 

Change: Daily 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

0.5 mg/m3

: Qm 

1 mg/m3

: 95XQ/Sa 

2.5 mg/m3

: Sa:Cf/PaprHie 

5 mg/m3

: 100F/SaT:Cf/PaprTHie/ 

 ScbaF/SaF 

100 mg/m3

: Sa:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Hema, back pain; hematoma arms, legs; epis, bleeding lips, muc 

memb hemorr; abdom pain, vomit, fecal blood; petechial rash; abnor 

hematologic indices 

TO: Blood, CVS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 

Welding fumes Formula: CAS#: RTECS#: 

ZC2550000 

IDLH: 

Ca [N.D.] 

Conversion: DOT: 

Synonyms/Trade Names: Synonyms vary depending upon the specific component of the welding fumes. 

Exposure Limits: 

NIOSH REL: Ca 

 See Appendix A 

OSHA PEL†: none 

Physical Description: Fumes generated by the process of joining or cutting pieces 

of metal by heat, pressure, or both. 

Measurement Methods 

(see Table 1): 

NIOSH 7300, 7301, 7303 

Chemical & Physical Properties: 

Properties vary depending upon the 

specific component of the welding 

fumes. 

Personal Protection/Sanitation

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv100/ScbaE 

Incompatibilities and Reactivities: Varies 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con 

SY: Symptoms vary depending upon the specific component of the 

welding fumes; metal fume fever: flu-like symptoms, dysp, cough, musc 

pain, fever, chills; interstitial pneu; [carc] 

TO: Eyes, skin, resp sys, CNS [lung cancer] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash 

Breath: Resp support 
335

X 

Wood dust Formula: CAS#: RTECS#: 

ZC9850000 

IDLH: 

Ca [N.D.] 

Conversion: DOT: 

Synonyms/Trade Names: Hard wood dust, Soft wood dust, Western red cedar dust 

Exposure Limits: 

NIOSH REL: Ca 

 TWA 1 mg/m3

 

 See Appendix A 

OSHA PEL†: TWA 15 mg/m3

 (total) 

 TWA 5 mg/m3

 (resp) 

Physical Description: Dust from various types of wood. 

Measurement Methods 

(see Table 1): 

NIOSH 0500 

Chemical & Physical Properties: 

MW: varies 

BP: NA 

Sol: ? 

Fl.P: NA 

IP: NA 

Sp.Gr: ? 

VP: 0 mmHg (approx) 

MLT: NA 

UEL: NA 

LEL: NA 

Combustible Solid 

Personal Protection/Sanitation

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

¥: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Incompatibilities and Reactivities: None reported 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con 

SY: Irrit eyes; epis; derm; resp hypersensitivity; granulomatous 

pneu; asthma, cough, wheez, sinusitis; prolonged colds; [carc] 

TO: Eyes, skin, resp sys [nasal cancer] 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash 

Breath: Fresh air 

m-Xylene Formula: 

C6H4(CH3)2

CAS#: 

108-38-3 

RTECS#: 

ZE2275000 

IDLH: 

900 ppm 

Conversion: 1 ppm = 4.34 mg/m3 DOT: 1307 130 

Synonyms/Trade Names: 1,3-Dimethylbenzene; meta-Xylene; m-Xylol 

Exposure Limits: 

NIOSH REL: TWA 100 ppm (435 mg/m3

) 

 ST 150 ppm (655 mg/m3

) 

OSHA PEL†: TWA 100 ppm (435 mg/m3

) 

Physical Description: Colorless liquid with an aromatic odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1501, 3800 

OSHA 1002 

Chemical & Physical Properties: 

MW: 106.2 

BP: 282°F 

Sol: Slight 

Fl.P: 82°F 

IP: 8.56 eV 

Sp.Gr: 0.86 

VP: 9 mmHg 

FRZ: -54°F 

UEL: 7.0% 

LEL: 1.1% 

Class IC Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

900 ppm: CcrOv*/PaprOv*/ 

 Sa*/ScbaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, strong acids 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, nose, throat; dizz, excitement, drow, inco, staggering 

gait; corn vacuolization; anor, nau, vomit, abdom pain; derm 

TO: Eyes, skin, resp sys, CNS, GI tract, blood, liver, kidneys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 
336

X 

o-Xylene Formula: 

C6H4(CH3)2

CAS#: 

95-47-6 

RTECS#: 

ZE2450000 

IDLH: 

900 ppm 

Conversion: 1 ppm = 4.34 mg/m3 DOT: 1307 130 

Synonyms/Trade Names: 1,2-Dimethylbenzene; ortho-Xylene; o-Xylol 

Exposure Limits: 

NIOSH REL: TWA 100 ppm (435 mg/m3

) 

 ST 150 ppm (655 mg/m3

) 

OSHA PEL†: TWA 100 ppm (435 mg/m3

) 

Physical Description: Colorless liquid with an aromatic odor. 

Measurement Methods 

(see Table 1): 

NIOSH 1501, 3800 

OSHA 1002 

Chemical & Physical 

Properties: 

MW: 106.2 

BP: 292°F 

Sol: 0.02% 

Fl.P: 90°F 

IP: 8.56 eV 

Sp.Gr: 0.88 

VP: 7 mmHg 

FRZ: -13°F 

UEL: 6.7% 

LEL: 0.9% 

Class IC Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

900 ppm: CcrOv*/PaprOv*/ 

 Sa*/ScbaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, strong acids 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, nose, throat; dizz, excitement, drow, inco, staggering 

gait; corn vacuolization; anor, nau, vomit, abdom pain; derm 

TO: Eyes, skin, resp sys, CNS, GI tract, blood, liver, kidneys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 

p-Xylene Formula: 

C6H4(CH3)2

CAS#: 

106-42-3 

RTECS#: 

ZE2625000 

IDLH: 

900 ppm 

Conversion: 1 ppm = 4.41 mg/m3 DOT: 1307 130 

Synonyms/Trade Names: 1,4-Dimethylbenzene; para-Xylene; p-Xylol 

Exposure Limits: 

NIOSH REL: TWA 100 ppm (435 mg/m3

) 

 ST 150 ppm (655 mg/m3

) 

OSHA PEL†: TWA 100 ppm (435 mg/m3

) 

Measurement Methods 

(see Table 1): 

NIOSH 1501, 3800 

OSHA 1002 

Physical Description: Colorless liquid with an aromatic odor. [Note: A solid below 56°F.] 

Chemical & Physical Properties: 

MW: 106.2 

BP: 281°F 

Sol: 0.02% 

Fl.P: 81°F 

IP: 8.44 eV 

Sp.Gr: 0.86 

VP: 9 mmHg 

FRZ: 56°F 

UEL: 7.0% 

LEL: 1.1% 

Class IC Flammable Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet (flamm) 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

900 ppm: CcrOv*/PaprOv*/ 

 Sa*/ScbaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, strong acids 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Irrit eyes, skin, nose, throat; dizz, excitement, drow, inco, staggering 

gait; corn vacuolization; anor, nau, vomit, abdom pain; derm 

TO: Eyes, skin, resp sys, CNS, GI tract, blood, liver, kidneys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 
337

X 

m-Xylene α,α'-diamine Formula: 

C6H4(CH2NH2)2

CAS#: 

1477-55-0 

RTECS#: 

PF8970000 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: 1,3-bis(Aminomethyl)benzene; 1,3-Benzenedimethanamine; MXDA; 

m-Phenylenebis(methylamine); m-Xylylenediamine 

Exposure Limits: 

NIOSH REL: C 0.1 mg/m3

 [skin] 

OSHA PEL†: none 

Physical Description: Colorless liquid. 

Measurement Methods 

(see Table 1): 

OSHA 105 

Chemical & Physical Properties: 

MW: 136.2 

BP: 477°F 

Sol: Miscible 

Fl.P: 243°F 

IP: ? 

Sp.Gr: 1.032 

VP(77°F): 0.03 mmHg 

FRZ: 58°F 

UEL: ? 

LEL: ? 

Class IIIB Combustible Liquid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Incompatibilities and Reactivities: None reported 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: In animals: irrit eyes, skin; liver, kidney, lung damage 

TO: Eyes, skin, resp sys, liver, kidneys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Water flush immed 

Breath: Resp support 

Swallow: Medical attention immed 

Xylidine Formula: 

(CH3)2C6H3NH2

CAS#: 

1300-73-8 

RTECS#: 

ZE8575000 

IDLH: 

50 ppm 

Conversion: 1 ppm = 4.96 mg/m3 DOT: 1711 153 

Synonyms/Trade Names: Aminodimethylbenzene, Aminoxylene, Dimethylaminobenzene, Dimethylaniline, 

Xylidine isomers (e.g., 2,4-Dimethylaniline) 

[Note: Dimethylaniline is also used as a synonym for N,N-Dimethylaniline.] 

Exposure Limits: 

NIOSH REL: TWA 2 ppm (10 mg/m3

) [skin] 

OSHA PEL†: TWA 5 ppm (25 mg/m3

) [skin] 

Physical Description: Pale-yellow to brown liquid with a weak, aromatic, 

amine-like odor. 

Measurement Methods 

(see Table 1): 

NIOSH 2002 

Chemical & Physical Properties: 

MW: 121.2 

BP: 415-439°F 

Sol: Slight 

Fl.P: 206°F (2,3-) 

IP: 7.65 eV (2,4-) 

 7.30 eV (2,6-) 

Sp.Gr: 0.98 

VP: <1 mmHg 

FRZ: -33°F 

UEL: ? 

LEL: 1.0% (o-isomer) 

Class IIIB Combustible Liquid (2,3-) 

Personal Protection/Sanitation 

(see Table 2): 

Skin: Prevent skin contact 

Eyes: Prevent eye contact 

Wash skin: When contam 

Remove: When wet or contam 

Change: N.R. 

Provide: Eyewash 

 Quick drench 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH 

20 ppm: CcrOv/Sa 

50 ppm: Sa:Cf/CcrFOv/GmFOv/ 

 PaprOv/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: GmFOv/ScbaE 

Incompatibilities and Reactivities: Strong oxidizers, hypochlorite salts 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Abs, Ing, Con 

SY: Anoxia, cyan, methemo; lung, liver, kidney damage 

TO: Resp sys, blood, liver, kidneys, CVS 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash immed 

Breath: Resp support 

Swallow: Medical attention immed 
338

Y 

Z 

Yttrium Formula: 

Y 

CAS#: 

7440-65-5 

RTECS#: 

ZG2980000 

IDLH: 

500 mg/m3

 (as Y) 

Conversion: DOT: 

Synonyms/Trade Names: Yttrium metal 

Exposure Limits: 

NIOSH REL*: TWA 1 mg/m3

 

OSHA PEL*: TWA 1 mg/m3

 

[*Note: The REL and PEL also apply to other yttrium compounds (as Y).] 

Physical Description: Dark-gray to black, odorless solid. 

Measurement Methods 

(see Table 1): 

NIOSH 7300, 7301, 7303, 9102 

OSHA ID121 

Chemical & Physical Properties: 

MW: 88.9 

BP: 5301°F 

Sol: Soluble in hot H2O 

Fl.P: NA 

IP: NA 

Sp.Gr: 4.47 

VP: 0 mmHg (approx) 

MLT: 2732°F 

UEL: NA 

LEL: NA 

Noncombustible Solid in bulk form. 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

5 mg/m3

: Qm 

10 mg/m3

: 95XQ/Sa 

25 mg/m3

: Sa:Cf/PaprHie 

50 mg/m3

: 100F/SaT:Cf/PaprTHie/ 

 ScbaF/SaF 

500 mg/m3

: Sa:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Incompatibilities and Reactivities: Oxidizers 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes; in animals: pulm irrit; eye inj; possible liver damage 

TO: Eyes, resp sys, liver 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash prompt 

Breath: Resp support 

Swallow: Medical attention immed 

Zinc chloride fume Formula: 

ZnCl2

CAS#: 

7646-85-7 

RTECS#: 

ZH1400000 

IDLH: 

50 mg/m3

Conversion: DOT: 2331 154 

Synonyms/Trade Names: Zinc dichloride fume 

Exposure Limits: 

NIOSH REL: TWA 1 mg/m3

 

 ST 2 mg/m3

OSHA PEL†: TWA 1 mg/m3

Physical Description: White particulate dispersed in air. 

Measurement Methods 

(see Table 1): 

OSHA ID121 

Chemical & Physical 

Properties: 

MW: 136.3 

BP: 1350°F 

Sol(70°F): 435% 

Fl.P: NA 

IP: NA 

Sp.Gr(77°F): 2.91 

VP: 0 mmHg (approx) 

MLT: 554°F 

UEL: NA 

LEL: NA 

Noncombustible Solid 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

10 mg/m3

: 95XQ*/Sa* 

25 mg/m3

: Sa:Cf*/PaprHie* 

50 mg/m3

: 100F/PaprTHie*/ScbaF/SaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Incompatibilities and Reactivities: Potassium 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con 

SY: Irrit eyes, skin, nose, throat; conj; cough, copious sputum; dysp, chest pain, 

pulm edema, pneu; pulm fib, cor pulmonale; fever; cyan; tachypnea; skin burns 

TO: Eyes, skin, resp sys, CVS 

First Aid (see Table 6): 

Breath: Resp support 
339

Z 

Zinc oxide Formula: 

ZnO 

CAS#: 

1314-13-2 

RTECS#: 

ZH4810000 

IDLH: 

500 mg/m3

Conversion: DOT: 1516 143 

Synonyms/Trade Names: Zinc peroxide 

Exposure Limits: 

NIOSH REL: Dust: TWA 5 mg/m3

 

 C 15 mg/m3

 

 Fume: TWA 5 mg/m3

 ST 10 mg/m3

OSHA PEL†: TWA 5 mg/m3 (fume) 

 TWA 15 mg/m3

 (total dust) 

 TWA 5 mg/m3

 (resp dust) 

Physical Description: White, odorless solid. 

Measurement Methods 

(see Table 1): 

NIOSH 7303, 7502 

OSHA ID121, ID143 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

50 mg/m3

: 95XQ/Sa 

125 mg/m3

: Sa:Cf/PaprHie 

250 mg/m3

: 100F/SaT:Cf/PaprTHie/ 

 ScbaF/SaF 

500 mg/m3

: Sa:Pd,Pp 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Chemical & Physical 

Properties: 

MW: 81.4 

BP: ? 

Sol(64°F): 0.0004% 

Fl.P: NA 

IP: NA 

Sp.Gr: 5.61 

VP: 0 mmHg (approx) 

MLT: 3587°F 

UEL: NA 

LEL: NA 

Noncombustible Solid Incompatibilities and Reactivities: Chlorinated rubber (at 419°F), water 

[Note: Slowly decomposed by water.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh 

SY: Metal fume fever: chills, musc ache, nau, fever, dry throat, cough; 

lass; metallic taste; head; blurred vision; low back pain; vomit; mal; chest 

tight; dysp, rales, decr pulm func 

TO: Resp sys 

First Aid (see Table 6): 

Breath: Resp support 

Zinc stearate Formula: 

Zn(C18H35O2)2

CAS#: 

557-05-1 

RTECS#: 

ZH5200000 

IDLH: 

N.D. 

Conversion: DOT: 

Synonyms/Trade Names: Dibasic zinc stearate, Zinc salt of stearic acid, Zinc distearate 

Exposure Limits: 

NIOSH REL: TWA 10 mg/m3

 (total) OSHA PEL†: TWA 15 mg/m3 (total) 

 TWA 5 mg/m3

 (resp) TWA 5 mg/m3 (resp) 

Physical Description: Soft, white powder with a slight, characteristic odor. 

Measurement Methods 

(see Table 1): 

NIOSH 0500, 0600 

Personal Protection/Sanitation 

(see Table 2): 

Skin: N.R. 

Eyes: N.R. 

Wash skin: N.R. 

Remove: N.R. 

Change: N.R. 

Respirator Recommendations 

(see Tables 3 and 4): 

Not available. 

Chemical & Physical Properties: 

MW: 632.4 

BP: ? 

Sol: Insoluble 

Fl.P(oc): 530°F 

IP: NA 

Sp.Gr: 1.10 

VP: 0 mmHg (approx) 

MLT: 266°F 

UEL: ? 

LEL: ? 

MEC: 20 g/m3

Combustible Solid Incompatibilities and Reactivities: Oxidizers, dilute acids 

[Note: Hydrophobic (i.e., repels water).] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Ing, Con 

SY: Irrit eyes, skin, upper resp sys; cough 

TO: Eyes, skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash 

Breath: Fresh air 

Swallow: Medical attention immed 
340

Z 

Zirconium compounds (as Zr) Formula: 

Zr (metal) 

CAS#: 

7440-67-7 (metal) 

RTECS#: 

ZH7070000 (metal) 

IDLH: 

50 mg/m3

 (as Zr) 

Conversion: DOT: 1358 170 (powder, wet); 1932 135 (scrap); 2008 135 (powder, dry) 

Synonyms/Trade Names: Zirconium metal: Zirconium 

Synonyms of other zirconium compounds vary depending upon the specific compound. 

Exposure Limits: 

NIOSH REL*: TWA 5 mg/m3

 

 ST 10 mg/m3

 

[*Note: The REL applies to all zirconium compounds (as Zr) except Zirconium 

tetrachloride.] 

OSHA PEL†: TWA 5 mg/m3

Measurement Methods 

(see Table 1): 

NIOSH 7300, 7301, 9102 

OSHA ID121 

Physical Description: Metal: Soft, malleable, ductile, solid or gray to gold, amorphous powder. 

Chemical & Physical Properties: 

MW: 91.2 

BP: 6471°F 

Sol: Insoluble 

Fl.P: NA 

IP: NA 

Sp.Gr: 6.51 (Metal) 

VP: 0 mmHg (approx) 

MLT: 3375°F 

UEL: NA 

LEL: NA 

Metal: Combustible, but solid form is 

difficult to ignite; however, powder form 

may ignite SPONTANEOUSLY and 

can continue burning under water. 

Personal Protection/Sanitation

(see Table 2): 

Recommendations regarding 

personal protective clothing vary 

depending upon the specific 

compound. 

 

Respirator Recommendations 

(see Tables 3 and 4): 

NIOSH/OSHA 

25 mg/m3

: Qm 

50 mg/m3

: 95XQ/PaprHie/100F/ 

 Sa/ScbaF 

§: ScbaF:Pd,Pp/SaF:Pd,Pp:AScba 

Escape: 100F/ScbaE 

Incompatibilities and Reactivities: Potassium nitrate, oxidizers 

[Note: Fine powder may be stored completely immersed in water.] 

Exposure Routes, Symptoms, Target Organs (see Table 5): 

ER: Inh, Con 

SY: Skin, lung granulomas; in animals: irrit skin, muc memb; 

X-ray evidence of retention in lungs 

TO: Skin, resp sys 

First Aid (see Table 6): 

Eye: Irr immed 

Skin: Soap wash 

Breath: Resp support 

Swallow: Medical attention immed 
341

APPENDICES
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A

Appendix A 

 NIOSH POTENTIAL OCCUPATIONAL CARCINOGENS

New Policy (Adopted September 1995)

For the past 20 plus years, NIOSH has subscribed to a carcinogen policy that was published 

in 1976 by Edward J. Fairchild, II, Associate Director for Cincinnati Operations, which called for 

“no detectable exposure levels for proven carcinogenic substances” (Annals of the New York 

Academy of Sciences, 271:200-207, 1976). This was in response to a generic OSHA rulemaking 

on carcinogens. Because of advances in science and in approaches to risk assessment and risk 

management, NIOSH has adopted a more inclusive policy. NIOSH recommended exposure 

limits (RELs) will be based on risk evaluations using human or animal health effects data, and on 

an assessment of what levels can be feasibly achieved by engineering controls and measured by 

analytical techniques. To the extent feasible, NIOSH will project not only a no effect exposure, 

but also exposure levels at which there may be residual risks. This policy applies to all 

workplace hazards, including carcinogens, and is responsive to Section 20(a)(3) of the 

Occupational Safety and Health Act of 1970, which charges NIOSH to “. . .describe exposure 

levels that are safe for various periods of employment, including but not limited to the exposure 

levels at which no employee will suffer impaired health or functional capacities or diminished 

life expectancy as a result of his work experience.” 

 The effect of this new policy will be the development, whenever possible, of quantitative 

RELs that are based on human and/or animal data, as well as on the consideration of 

technological feasibility for controlling workplace exposures to the REL. Under the old policy, 

RELs for most carcinogens were non-quantitative values labeled “lowest feasible concentration 

(LFC).” [Note: There are a few exceptions to LFC RELs for carcinogens (e.g., RELs for 

asbestos, formaldehyde, benzene, and ethylene oxide are quantitative values based primarily on 

analytical limits of detection or technological feasibility). Also, in 1989, NIOSH adopted several 

quantitative RELs for carcinogens from OSHA's permissible exposure limit (PEL) update.] 

 Under the new policy, NIOSH will also recommend the complete range of respirators (as 

determined by the NIOSH Respirator Decision Logic) for carcinogens with quantitative RELs. 

In this way, respirators will be consistently recommended regardless of whether a substance is a 

carcinogen or a non-carcinogen. 

 

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Appendix A (Continued) 

NIOSH POTENTIAL OCCUPATIONAL CARCINOGENS

Old Policy

In the past, NIOSH identified numerous substances that should be treated as potential 

occupational carcinogens even though OSHA might not have identified them as such. In 

determining their carcinogenicity, NIOSH used the OSHA classification outlined in 

29 CFR 1990.103, which states in part: 

Potential occupational carcinogen means any substance, or combination or 

mixture of substances, which causes an increased incidence of benign and/or 

malignant neoplasms, or a substantial decrease in the latency period between 

exposure and onset of neoplasms in humans or in one or more experimental 

mammalian species as the result of any oral, respiratory or dermal exposure, or 

any other exposure which results in the induction of tumors at a site other than 

the site of administration. This definition also includes any substance which is 

metabolized into one or more potential occupational carcinogens by mammals. 

 When thresholds for carcinogens that would protect 100% of the population had not been 

identified, NIOSH usually recommended that occupational exposures to carcinogens be limited 

to the lowest feasible concentration. To ensure maximum protection from carcinogens through 

the use of respiratory protection, NIOSH also recommended that only the most reliable and 

protective respirators be used. These respirators include (1) a self-contained breathing apparatus 

(SCBA) that has a full facepiece and is operated in a positive pressure mode, or (2) a supplied air 

respirator that has a full facepiece and is operated in a pressure demand or other positive pressure 

mode in combination with an auxiliary SCBA operated in a pressure demand or other positive 

pressure mode. 

Recommendations to be Revised

 The RELs and respirator recommendations for carcinogens listed in this edition of the 

Pocket Guide still reflect the old policy. Changes in the RELs and respirator recommendations 

that reflect the new policy will be included in future editions. 

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Appendix B 

THIRTEEN OSHA-REGULATED CARCINOGENS

Without establishing PELs, OSHA promulgated standards in 1974 to regulate the industrial 

use of the following 13 chemicals identified as potential occupational carcinogens: 

• 2-Acetylaminofluorene 

• 4-Aminodiphenyl 

• Benzidine 

• bis-Chloromethyl ether 

• 3,3'-Dichlorobenzidine 

• 4-Dimethylaminoazobenzene 

• Ethyleneimine 

• Methyl chloromethyl ether 

• α-Naphthylamine 

• β-Naphthylamine 

• 4-Nitrobiphenyl 

• N-Nitrosodimethylamine 

• β-Propiolactone

Exposures of workers to these 13 chemicals are to be controlled through the required use of 

engineering controls, work practices, and personal protective equipment, including respirators. 

OSHA respirator requirements for these chemicals are provided in Appendix E (page 351). See 

29 CFR 1910.1003 - 1910.1016 for more specific details of these requirements. 

 

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Appendix C 

SUPPLEMENTARY EXPOSURE LIMITS

Aldehydes (Low-Molecular-Weight)

Exposure to acetaldehyde has produced nasal tumors in rats and laryngeal tumors in 

hamsters, and exposure to malonaldehyde has produced thyroid gland and pancreatic islet cell 

tumors in rats. NIOSH therefore recommends that acetaldehyde and malonaldehyde be 

considered potential occupational carcinogens in conformance with the OSHA carcinogen policy. 

Testing has not been completed to determine the carcinogenicity of the following nine related 

low-molecular-weight aldehydes: 

● Acrolein (CAS# 107-02-8) ● Paraformaldehyde (CAS# 30525-89-4) 

● Butyraldehyde (CAS# 123-72-8) ● Propiolaldehyde (CAS# 624-67-9) 

● Crotonaldehyde (CAS# 4170-30-3) ● Propionaldehyde (CAS# 123-38-6) 

● Glutaraldehyde (CAS# 111-30-8) ● n-Valeraldehyde (CAS# 110-62-3) 

● Glyoxal (CAS# 107-22-2) 

However, the limited studies to date indicate that these substances have chemical reactivity and 

mutagenicity similar to acetaldehyde and malonaldehyde. Therefore, NIOSH recommends that 

careful consideration should be given to reducing exposures to these nine related aldehydes. 

Further information can be found in NIOSH Current Intelligence Bulletin 55: Carcinogenicity of 

Acetaldehyde and Malonaldehyde, and Mutagenicity of Related Low-Molecular-Weight 

Aldehydes [DHHS (NIOSH) Publication No. 91-112]. This document is available on the NIOSH 

Web site (http://www.cdc.gov/niosh/91112_55.html). 

Asbestos

NIOSH considers asbestos to be a potential occupational carcinogen and recommends that 

exposures be reduced to the lowest feasible concentration. For asbestos fibers >5 micrometers in 

length, NIOSH recommends a REL of 100,000 fibers per cubic meter of air (100,000 fibers/m3

), 

which is equal to 0.1 fiber per cubic centimeter of air (0.1 fiber/cm3

), as determined by a 400-liter 

air sample collected over 100 minutes in accordance with NIOSH Analytical Method #7400. 

Airborne asbestos fibers are defined as those particles having (1) an aspect ratio of 3 to 1 or 

greater and (2) the mineralogic characteristics (that is, the crystal structure and elemental 

composition) of the asbestos minerals and their nonasbestiform analogs. The asbestos minerals 

are defined as chrysotile, crocidolite, amosite (cummingtonite-grunerite), anthophyllite, 

tremolite, and actinolite. In addition, airborne cleavage fragments from the nonasbestiform 

habits of the serpentine minerals antigorite and lizardite, and the amphibole minerals contained in 

the series cummingtonite-grunerite, tremolite-ferroactinolite, and glaucophane-riebeckite should 

also be counted as fibers provided they meet the criteria for a fiber when viewed microscopically. 

 As found in 29 CFR 1910.1001, the OSHA PEL for asbestos fibers (i.e., actinolite asbestos, 

amosite, anthophyllite asbestos, chrysotile, crocidolite, and tremolite asbestos) is an 8-hour TWA 

airborne concentration of 0.1 fiber (longer than 5 micrometers and having a length to diameter 

ratio of at least 3 to 1) per cubic centimeter of air (0.1 fiber/cm3

), as determined by the membrane 

filter method at approximately 400X magnification with phase contrast illumination. No worker 

should be exposed in excess of 1 fiber/cm3

 (excursion limit) as averaged over a sampling period 

of 30 minutes. 

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Appendix C (Continued) 

SUPPLEMENTARY EXPOSURE LIMITS

Asphalt Fumes

 The recommendations provided below are from Health Effects of Occupational Exposure to 

Asphalt [DHHS (NIOSH) Publication No. 2001-110] (http://www.cdc.gov/niosh/01-110pd.html). 

 Occupational exposure to asphalt fumes shall be controlled so that employees are not 

exposed to the airborne particulates at a concentration greater than 5 mg/m3

, determined during 

any 15-minute period. 

 Data regarding the potential carcinogenicity of paving asphalt fumes in humans are limited, 

and no animal studies have examined the carcinogenic potential of either field- or laboratorygenerated samples of paving asphalt fume condensates. NIOSH concludes that the collective 

data currently available from studies on paving asphalt provide insufficient evidence for an 

association between lung cancer and exposure to asphalt during paving. 

 The results from epidemiologic studies indicate that roofers are at an increased risk of lung 

cancer, but it is uncertain whether this increase can be attributed to asphalt and/or to other 

exposures such as coal tar or asbestos. Data from experimental studies in animals and cultured 

mammalian cells indicate that laboratory-generated roofing asphalt fume condensates are 

genotoxic and cause skin tumors in mice when applied dermally. Furthermore, a known 

carcinogen (Benzo(a)pyrene) was detected in field-generated roofing fumes. The collective 

health and exposure data provide sufficient evidence for NIOSH to conclude that roofing asphalt 

fumes are a potential occupational carcinogen. 

 The available data indicate that although not all asphalt-based paint formulations may exert 

genotoxicity, some are genotoxic and carcinogenic in animals. No published data examine the 

carcinogenic potential of asphalt-based paints in humans, but NIOSH concludes that asphaltbased paints are potential occupational carcinogens. 

Benzidine-, o-Tolidine-, and o-Dianisidine-based Dyes

 In December 1980, OSHA and NIOSH jointly published the Health Hazard Alert: 

Benzidine-, o-Tolidine-, and o-Dianisidine-based Dyes [DHHS (NIOSH) Publication 

No. 81-106] (http://www.cdc.gov/niosh/81-106.html). In this Alert, OSHA and NIOSH 

concluded that benzidine and benzidine-based dyes were potential occupational carcinogens and 

recommended that worker exposure be reduced to the lowest feasible level. OSHA and NIOSH 

further concluded that o-tolidine and o-dianisidine (and dyes based on them) may present a 

cancer risk to workers and should be handled with caution and exposure minimized. 

Carbon Black

NIOSH considers “Carbon Black” to be the material consisting of more than 80% elemental 

carbon, in the form of near-spherical colloidal particles and coalesced particle aggregates of 

colloidal size, that is obtained by the partial combustion or thermal decomposition of 

hydrocarbons. The NIOSH REL (10-hour TWA) for carbon black is 3.5 mg/m3

. Polycyclic 

aromatic hydrocarbons (PAHs), particulate polycyclic organic material (PPOM), and polynuclear 

aromatic hydrocarbons (PNAs) are terms frequently used to describe various petroleum-based 

substances that NIOSH considers to be potential occupational carcinogens. Since some of these 

aromatic hydrocarbons may be formed during the manufacture of carbon black (and become 

adsorbed on the carbon black), the NIOSH REL (10-hour TWA) for carbon black in the presence

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SUPPLEMENTARY EXPOSURE LIMITS

of PAHs is 0.1 mg PAHs/m3 (measured as the cyclohexane-extractable fraction). The OSHA 

PEL (8-hour TWA) for carbon black is 3.5 mg/m3

. 

Chloroethanes

NIOSH considers the following four chemicals to be potential occupational carcinogens: 

● Ethylene dichloride ● 1,1,2,2-Tetrachloroethane 

● Hexachloroethane ● 1,1,2-Trichloroethane

Additionally, NIOSH recommends that the following five other chloroethane compounds be 

treated in the workplace with caution because of their structural similarity to the four 

chloroethanes shown to be carcinogenic in animals: 

● 1,1-Dichloroethane ● Methyl chloroform ● 1,1,1,2-Tetrachloroethane 

● Ethyl chloride ● Pentachloroethane 

Chromic Acid and Chromates (as CrO3), Chromium(II) and Chromium(III) 

Compounds (as Cr), and Chromium Metal (as Cr)

 The NIOSH REL (10-hour TWA) is 0.001 mg Cr(VI)/m3 for all hexavalent chromium 

[Cr(VI)] compounds. NIOSH considers all Cr(VI) compounds (including chromic acid, 

tert-butyl chromate, zinc chromate, and chromyl chloride) to be potential occupational 

carcinogens. The NIOSH REL (8-hour TWA) is 0.5 mg Cr/m3

 for chromium metal and 

chromium(II) and chromium(III) compounds. 

 The OSHA PEL is 0.005 mg CrO3/m3 (8-hour TWA) for chromic acid and chromates 

(including tert-butyl chromate with a “skin” designation and zinc chromate); 0.5 mg Cr/m3

 (8-

hour TWA) for chromium(II) and chromium(III) compounds; and 1 mg Cr/m3

 (8-hour TWA) for 

chromium metal and insoluble salts. 

Coal Dust and Coal Mine Dust

The NIOSH REL (10-hour TWA) for respirable coal mine dust is 1 mg/m3, measured using 

a coal mine personal sampler unit (CPSU) as defined in 30 CFR 74.2. The REL is equivalent to 

0.9 mg/m3

 measured according to the ISO/CEN/ACGIH (International Standards Organization/ 

Comité Européen de Normalisation/American Conference of Governmental Industrial 

Hygienists) definition of respirable dust. The REL applies to respirable coal mine dust and 

respirable coal dust in occupations other than mining. NIOSH recommends a separate REL for 

crystalline silica. See NIOSH publication 95-106 (Criteria for a Recommended Standard - 

Occupational Exposure to Respirable Coal Mine Dust) for more detailed information. 

Coal Tar Pitch Volatiles

NIOSH considers coal tar products (i.e., coal tar, coal tar pitch, or creosote) to be potential 

occupational carcinogens; the NIOSH REL (10-hour TWA) for coal tar products is 0.1 mg/m3

(cyclohexane-extractable fraction). 

 The OSHA PEL (8-hour TWA) for coal tar pitch volatiles is 0.2 mg/m3

 (benzene-soluble 

fraction). OSHA defines “coal tar pitch volatiles” in 29 CFR 1910.1002 as the fused polycyclic 

hydrocarbons that volatilize from the distillation residues of coal, petroleum (excluding asphalt), 
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SUPPLEMENTARY EXPOSURE LIMITS

wood, and other organic matter and includes substances such as anthracene, benzo(a)pyrene 

(BaP), phenanthrene, acridine, chrysene, pyrene, etc. 

Coke Oven Emissions

 

The production of coke by the carbonization of bituminous coal leads to the release of 

chemically-complex emissions from coke ovens that include both gases and particulate matter of 

varying chemical composition. The emissions include coal tar pitch volatiles (e.g., particulate 

polycyclic organic matter [PPOM], polycyclic aromatic hydrocarbons [PAHs], and polynuclear 

aromatic hydrocarbons [PNAs]), aromatic compounds (e.g., benzene and β-naphthylamine), trace 

metals (e.g., arsenic, beryllium, cadmium, chromium, lead, and nickel), and gases (e.g., nitric 

oxides and sulfur dioxide). 

Cotton Dust (raw)

NIOSH recommends reducing exposures to cotton dust to the lowest feasible concentration 

to reduce the prevalence and severity of byssinosis; the REL is <0.200 mg/m3

 (as lint free cotton 

dust). 

 As found in OSHA Table Z-1 (29 CFR 1910.1000), the PEL for cotton dust (raw) is 

1 mg/m3

 for the cotton waste processing operations of waste recycling (sorting, blending, 

cleaning, and willowing) and garnetting. PELs for other sectors (as found in 29 CFR 1910.1043) 

are 0.200 mg/m3

 for yarn manufacturing and cotton washing operations, 0.500 mg/m3 for textile 

mill waste house operations or for dust from “lower grade washed cotton” used during yarn 

manufacturing, and 0.750 mg/m3

 for textile slashing and weaving operations. The OSHA 

standard 29 CFR 1910.1043 does not apply to cotton harvesting, ginning, or the handling and 

processing of woven or knitted materials and washed cotton. All PELs for cotton dust are mean 

concentrations of lint-free, respirable cotton dust collected by a vertical elutriator or an 

equivalent method and averaged over an 8-hour period. 

Lead

 NIOSH considers “Lead” to mean metallic lead, lead oxides, and lead salts (including 

organic salts such as lead soaps but excluding lead arsenate). The NIOSH REL for lead (8-hour 

TWA) is 0.050 mg/m3

; air concentrations should be maintained so that worker blood lead 

remains less than 0.060 mg Pb/100 g of whole blood. 

 OSHA considers “Lead” to mean metallic lead, all inorganic lead compounds (lead oxides 

and lead salts), and a class of organic compounds called soaps; all other lead compounds are 

excluded from this definition. The OSHA PEL (8-hour TWA) is 0.050 mg/m3

; other OSHA 

requirements can be found in 29 CFR 1910.1025. The OSHA PEL (8 hour-TWA) for lead in 

“non-ferrous foundries with less than 20 employees” is 0.075 mg/m3

. 

Mineral Dusts

The OSHA PELS for “mineral dusts” listed below are from Table Z-3 of 

29 CFR 1910.1000. The OSHA PEL (8-hour TWA) for crystalline silica (as respirable quartz) 

is either 250 mppcf divided by the value “%SiO2 + 5” or 10 mg/m3

 divided by the value 

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SUPPLEMENTARY EXPOSURE LIMITS

“%SiO2 + 2.” The OSHA PEL (8-hour TWA) for crystalline silica (as total quartz) is 30 mg/m3

divided by the value “%SiO2 + 2.” The OSHA PELs (8-hour TWAs) for cristobalite and 

tridymite are 1⁄2 the values calculated above using the count or mass formulae for quartz. 

 The OSHA PEL (8-hour TWA) for amorphous silica (including diatomaceous earth) is 

either 80 mg/m3

 divided by the value “%SiO2,” or 20 mppcf. 

 The OSHA PELs (8-hour TWAs) for talc (not containing asbestos), mica, and soapstone are 

20 mppcf. The OSHA PEL (8-hour TWA) for portland cement is 50 mppcf. The OSHA PEL 

(8-hour TWA) for graphite (natural) is 15 mppcf. The PELs for talc (not containing asbestos), 

mica, soapstone, and portland cement are applicable if the material contains less than 1% 

crystalline silica. 

 The OSHA PEL (8-hour TWA) for coal dust (as the respirable fraction) containing less than 

5% SiO2 is 2.4 mg/m3

 divided by the value “%SiO2 + 2.” The OSHA PEL (8-hour TWA) for 

coal dust (as the respirable fraction) containing greater than or equal to 5% SiO2 is 10 mg/m3

divided by the value “%SiO2 + 2.” 

NIAX® Catalyst ESN

 

 In May 1978, OSHA and NIOSH jointly published Current Intelligence Bulletin (CIB) 26: 

NIAX® Catalyst ESN. In this CIB, OSHA and NIOSH recommended that occupational exposure 

to NIAX® Catalyst ESN, its components, dimethylaminopropionitrile and 

bis(2-(dimethylamino)ethyl)ether, as well as formulations containing either component, be 

minimized. Exposures should be limited to as few workers as possible, while minimizing 

workplace exposure concentrations with effective work practices and engineering controls. 

Exposed workers should be carefully monitored for potential disorders of the nervous and 

genitourinary system. Although substitution is a possible control measure, alternatives to 

NIAX® Catalyst ESN or its components should be carefully evaluated with regard to possible 

adverse health effects. 

Trichloroethylene

 NIOSH considers trichloroethylene (TCE) to be a potential occupational carcinogen and 

recommends a REL of 2 ppm (as a 60-minute ceiling) during the use of TCE as an anesthetic 

agent, and 25 ppm (as a 10-hour TWA) during all other exposures. 

Tungsten Carbide (Cemented)

 “Cemented tungsten carbide” or “hard metal” refers to a mixture of tungsten carbide, cobalt, 

and sometimes metal oxides or carbides and other metals (including nickel). When the cobalt 

(Co) content exceeds 2%, its contribution to the potential hazard is judged to exceed that of 

tungsten carbide. Therefore, the NIOSH REL (10-hour TWA) for cemented tungsten carbide 

containing >2% Co is 0.05 mg Co/m3

; the applicable OSHA PEL is 0.1 mg Co/m3 (8-hour 

TWA). Nickel (Ni) may sometimes be used as a binder rather than cobalt. NIOSH considers 

cemented tungsten carbide containing nickel to be a potential occupational carcinogen and 

recommends a REL of 0.015 mg Ni/m3

 (10-hour TWA). The OSHA PEL for Insoluble Nickel 

(i.e., a 1 mg Ni/m3

 8-hour TWA) applies to mixtures of tungsten carbide and nickel. 

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Appendix D 

SUBSTANCES WITH NO ESTABLISHED RELs

 After reviewing available published literature, NIOSH provided comments to OSHA 

on August 1, 1988, regarding the “Proposed Rule on Air Contaminants” (29 CFR 1910, 

Docket No. H-020). In these comments, NIOSH questioned whether the PELs proposed (and 

listed below) for the following substances included in the Pocket Guide were adequate to protect 

workers from recognized health hazards. The current PEL for each of these compounds is listed 

on the chemical page for each substance in the Pocket Guide. See pages xi-xii for a discussion of 

the vacated PELs. 

• Acetylene tetrabromide [TWA 1 ppm] 

• Chlorobenzene [TWA 75 ppm] 

• Ethyl bromide [TWA 200 ppm, STEL 250 ppm] 

• Ethylene glycol [C 50 ppm] 

• Ethyl ether [TWA 400 ppm, STEL 500 ppm] 

• Fenthion [TWA 0.2 mg/m3

 (skin)] 

• Furfural [TWA 2 ppm (skin)] 

• 2-Isopropoxyethanol [TWA 25 ppm] 

• Isopropyl acetate [TWA 250 ppm, STEL 310 ppm] 

• Isopropylamine [TWA 5 ppm, STEL 10 ppm] 

• Manganese tetroxide (as Mn) [TWA 1 mg/m3

] 

• Molybdenum (soluble compounds as Mo) [TWA 5 mg/m3

] 

• Nitromethane [TWA 100 ppm] 

• m-Toluidine [TWA 2 ppm (skin)] 

• Triethylamine [TWA 10 ppm, STEL 15 ppm] 

 At that time, NIOSH also conducted a limited evaluation of the literature and concluded that 

the documentation cited by OSHA was inadequate to support the proposed PEL (as an 8-hour 

TWA) of 10 mg/m3

 for the compounds listed below. The current PEL for magnesium oxide 

fume is 15 mg/m3

 (8-hour TWA, total particulate), and the current PEL for molybdenum 

(insoluble compounds as Mo) is 15 mg/m3

 (8-hour TWA, total dust). For the other compounds 

listed below the current PEL is 15 mg/m3

 (8-hour TWA, total dust) and 5 mg/m3 (8-hour TWA, 

respirable dust). 

• α-Alumina 

• Benomyl 

• Emery 

• Glycerine (mist) 

• Graphite (synthetic) 

• Magnesium oxide fume 

• Molybdenum (insoluble compounds as Mo) 

• Particulates not otherwise regulated 

• Picloram 

• Rouge 

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Appendix E 

OSHA Respirator Requirements for Selected Chemicals

Revisions to the OSHA Respiratory Protection Standard (29 CFR 1910.134) became 

effective on April 8, 1998. Incorporated within the preamble of this ruling were changes to 

OSHA regulations for several chemicals or substances, which are listed as subheadings in blue 

text throughout this appendix. These subheadings, which are also the titles of the affected 

standards within 29 CFR 1910 and 29 CFR 1926, are followed by the standard number(s) in 

parentheses and the OSHA respirator requirements. Fit testing is required by OSHA for all tightfitting air-purifying respirators. Please consult 29 CFR 1910.134 for the full content of the 

changes that apply. For all of the chemicals listed in this appendix, any respirators that are 

permitted at higher environmental concentrations can be used at lower concentrations. 

13 Carcinogens (4-Nitrobiphenyl, etc.) (1910.1003)

Employees engaged in handling operations involving the carcinogens listed below must be 

provided with, and required to wear and use, a half-mask filter-type respirator for dusts, mists, 

and fumes. A respirator affording higher levels of protection than this respirator may be 

substituted. 

● 2-Acetylaminofluorene ● 4-Dimethylaminoazobenezene ● β-Naphthylamine 

● 4-Aminodiphenyl ● Ethyleneimine ● 4-Nitrobiphenyl 

● Benzidine ● Methyl chloromethyl ether ● N-Nitrosodimethylamine 

● bis-Chloromethyl ether ● α-Naphthylamine ● β-Propiolactone 

● 3,3'-Dichlorobenzidine (and its salts) 

Acrylonitrile (1910.1045)

Airborne Concentration 

or Condition of Use Respirator Type 

≤ 20 ppm (parts per million) (1) Chemical cartridge respirator with organic vapor cartridge(s) and 

half-mask facepiece; or (2) Supplied-air respirator with half-mask 

facepiece. 

≤ 100 ppm or maximum 

use concentration of 

cartridges or canisters, 

whichever is lower 

(1) Full-facepiece respirator with (A) organic vapor cartridges, 

(B) organic vapor gas mask, chin-style, or (C) organic vapor gas mask 

canister, front- or back-mounted; (2) Supplied-air respirator with full 

facepiece; or (3) Self-contained breathing apparatus with full facepiece. 

≤ 4,000 ppm Supplied-air respirator operated in positive-pressure mode with full 

facepiece, helmet, suit, or hood. 

> 4,000 ppm or unknown 

concentration 

(1) Supplied-air and auxiliary self-contained breathing apparatus with 

full facepiece in positive-pressure mode; or (2) Self-contained breathing 

apparatus with full facepiece in positive-pressure mode. 

Firefighting Self-contained breathing apparatus with full facepiece in positivepressure mode. 

Escape (1) Any organic vapor respirator; or 

(2) Any self-contained breathing apparatus. 

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Appendix E (Continued) 

OSHA Respirator Requirements for Selected Chemicals

Arsenic, inorganic (1910.1018)

Requirements for Respiratory Protection for Inorganic Arsenic Particulate 

Except for Those With Significant Vapor Pressure

Airborne Concentration 

(as As) or Condition of Use Required Respirator 

≤ 100 μg/m3 (micrograms 

per cubic meter) 

(1) Half-mask air-purifying respirator equipped with high-efficiency 

filter*; or (2) Any half-mask supplied air respirator. 

≤ 500 μg/m3

(1) Full facepiece air-purifying respirator equipped with highefficiency filter*; (2) Any full-facepiece supplied-air respirator; or 

(3) Any full-facepiece self-contained breathing apparatus. 

≤ 10,000 μg/m3

(1) Powered air-purifying respirators in all inlet face coverings with 

high-efficiency filters*; or (2) Half-mask supplied-air respirators 

operated in positive-pressure mode. 

≤ 20,000 μg/m3 Supplied-air respirator with full facepiece, hood, or helmet or suit, 

operated in positive-pressure mode. 

> 20,000 μg/m3

, unknown 

concentrations, or firefighting 

Any full-facepiece self-contained breathing apparatus operated in 

positive-pressure mode. 

* A high-efficiency filter means a filter that is at least 99.97% efficient against mono-disperesed 

particles of 0.3 μm (micrometers) in diameter or higher. 

Requirements for Respiratory Protection for 

Inorganic Arsenicals With Significant Vapor Pressure

Airborne Concentration 

(as As) or Condition of Use Required Respirator 

≤ 100 μg/m3 (micrograms 

per cubic meter) 

(1) Half-mask* air-purifying respirator equipped with highefficiency filter** and acid gas cartridge; or (2) Any half-mask*

supplied-air respirator. 

≤ 500 μg/m3

(1) Front- or back-mounted gas mask equipped with high-efficiency 

filter** and acid gas canister; (2) Any full-facepiece supplied-air 

respirator; or (3) Any full-facepiece self-contained breathing 

apparatus. 

≤ 10,000 μg/m3 Half-mask* supplied-air respirator operated in positive-pressure 

mode. 

≤ 20,000 μg/m3 Supplied-air respirator with full facepiece, hood, or helmet or suit, 

operated in positive-pressure mode. 

> 20,000 μg/m3

, unknown 

concentrations, or firefighting 

Any full-facepiece self-contained breathing apparatus operated in 

positive-pressure mode. 

* Half-mask respirators shall not be used for protection against arsenic trichloride, as it is rapidly 

absorbed through the skin. 

** A high-efficiency filter means a filter that is at least 99.97% efficient against mono-disperesed 

particles of 0.3 μm (micrometers) in diameter or higher. 
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Appendix E (Continued) 

OSHA Respirator Requirements for Selected Chemicals

Asbestos (1910.1001 & 1926.1101)

Airborne Concentration 

or Condition of Use Required Respirator 

≤ 1 f/cm3 (fibers per cubic 

centimeter) (10 X PEL) 

Half-mask air-purifying respirator other than a disposable 

respirator, equipped with high-efficiency filters*. 

≤ 5 f/cm3 (50 X PEL) Full-facepiece air-purifying respirator equipped with highefficiency filters*. 

≤ 10 f/cm3

 (100 X PEL) 

Any powered air-purifying respirator equipped with highefficiency filters* or any supplied-air respirator operated in 

continuous-flow mode. 

≤ 100 f/cm3

 (1,000 X PEL) Full-facepiece supplied air respirator operated in pressure-demand 

mode. 

> 100 f/cm3

 (1,000 X PEL), 

or unknown concentrations 

Full-facepiece supplied-air respirator operated in pressure-demand 

mode, equipped with an auxiliary positive-pressure self-contained 

breathing apparatus. 

* A high-efficiency filter means a filter that is at least 99.97% efficient against mono-dispersed 

particles of 0.3 μm (micrometers) in diameter or higher. 

Benzene (1910.1028)

Airborne Concentration 

or Condition of Use Required Respirator 

≤ 10 ppm (parts per million) Half-mask air-purifying respirator with organic vapor cartridge. 

≤ 50 ppm (1) Full-facepiece respirator with organic vapor cartridges; or 

(2) Full-facepiece gas mask with chin-style canisters*. 

≤ 100 ppm Full-facepiece powered air-purifying respirator with organic vapor 

canister*. 

≤ 1,000 ppm Supplied-air respirator with full facepiece in positive-pressure 

mode. 

> 1,000 ppm or 

unknown concentration 

(1) Self-contained breathing apparatus with full facepiece in 

positive-pressure mode; or (2) Full-facepiece positive-pressure 

supplied-air respirator with auxiliary self-contained air supply. 

Escape (1) Any organic vapor gas mask; or (2) Any self-contained 

breathing apparatus with full facepiece. 

Firefighting Full-facepiece self-contained breathing apparatus in positivepressure mode. 

* Canisters must have a minimum service life of four (4) hours when tested at 150 ppm benzene, at a 

flow rate of 64 liters per minute (LPM), 25°C, and 85% relative humidity for non-powered airpurifying respirators. The flow rate shall be 115 LPM and 170 LPM, respectively, for tight-fitting and 

loose-fitting powered air-purifying respirators. 
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Appendix E (Continued) 

OSHA Respirator Requirements for Selected Chemicals

1,3-Butadiene (1910.1051)

Airborne Concentration or 

Condition of Use Required Respirator 

≤ 5 ppm (parts per million) Air-purifying half-mask or full-facepiece respirator equipped with 

approved butadiene or organic vapor cartridges or canisters. 

Cartridges or canisters shall be replaced every 4 hours. 

≤ 10 ppm Air-purifying half-mask or full-facepiece respirator equipped with 

approved butadiene or organic vapor cartridges or canisters. 

Cartridges or canisters shall be replaced every 3 hours. 

≤ 25 ppm (1) Air-purifying half-mask or full-facepiece respirator equipped with 

approved butadiene or organic vapor cartridges or canisters. 

Cartridges or canisters shall be replaced every 2 hours; 

(2) Any powered air-purifying respirator equipped with approved 

butadiene or organic vapor cartridges or canisters. Cartridges or 

canisters shall be replaced every [1] hour; or (3) Continuous-flow 

supplied-air respirator equipped with a hood or helmet. 

≤ 50 ppm (1) Air-purifying full-facepiece respirator equipped with approved 

butadiene or organic vapor cartridges or canisters. Cartridges or 

canisters shall be replaced every [1] hour; or (2) Powered airpurifying respirator (PAPR) equipped with a tight-fitting facepiece 

and approved butadiene or organic vapor cartridges. PAPR cartridges 

shall be replaced every [1] hour. 

≤ 1,000 ppm Supplied-air respirator equipped with a half-mask or full facepiece 

and operated in a pressure-demand or other positive-pressure mode. 

> 1,000 ppm, unknown 

concentration, or firefighting 

(1) Self-contained breathing apparatus equipped with a full facepiece 

and operated in a pressure-demand or other positive-pressure mode; 

or (2) Any supplied-air respirator equipped with a full facepiece and 

operated in a pressure-demand or other positive-pressure mode in 

combination with an auxiliary self-contained breathing apparatus 

operated in a pressure-demand or other positive-pressure mode. 

Escape from IDLH conditions 

(IDLH is 2,000 ppm) 

(1) Any positive-pressure self-contained breathing apparatus with an 

appropriate service life; or (2) Any air-purifying full-facepiece 

respirator equipped with a front- or back-mounted butadiene or 

organic vapor canister. 
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Appendix E (Continued) 

OSHA Respirator Requirements for Selected Chemicals

Cadmium (1910.1027 & 1926.1127)

Airborne Concentration 

or Condition of Use Required Respirator 

≤ 50 μg/m3 (micrograms 

per cubic meter) Half-mask, air-purifying respirator equipped with a high-efficiency filter*. 

≤ 125 μg/m3

(1) Powered air-purifying respirator with a loose-fiting hood or helmet 

equipped with a high-efficiency filter*; or (2) Supplied-air respirator with a 

loose-fitting hood or helmet facepiece operated in continuous-flow mode. 

≤ 250 μg/m3

(1) Full-facepiece air-purifying respirator equipped with a high-efficiency 

filter*; (2) Powered air-purifying respirator with a tight-fitting half-mask 

equipped with a high-efficiency filter*; or (3) Supplied-air respirator with a 

tight-fitting half-mask operated in continuous-flow mode. 

≤ 1,250 μg/m3

(1) Powered air-purifying respirator with a tight-fitting full facepiece 

equipped with a high-efficiency filter*; or (2) Supplied-air respirator with a 

tight-fitting full facepiece operated in continuous-flow mode. 

≤ 5,000 μg/m3 Supplied-air respirator with half-mask or full facepiece operated in 

pressure-demand or other positive-pressure mode. 

> 5,000 μg/m3

 or 

unknown concentration 

(1) Self-contained breathing apparatus with a full facepiece operated in 

pressure-demand or other positive-pressure mode; or (2) Supplied-air 

respirator with a full facepiece operated in pressure-demand or other 

positive-pressure mode and equipped with an auxiliary escape-type selfcontained breathing apparatus operated in pressure-demand mode. 

Firefighting Self-contained breathing apparatus with full facepiece operated in pressuredemand or other positive-pressure mode. 

Note: Quantitative fit testing is required for all tight-fitting air-purifying respirators where airborne 

concentration of cadmium exceeds 10 times the TWA PEL (10 X 5 μg/m3

 = 50 μg/m3). A fullfacepiece respirator is required when eye irritation is expected. 

* A high-efficiency filter means a filter that is at least 99.97% efficient against mono-dispersed 

particles of 0.3 μm (micrometers) in diameter or higher. 

Coke oven emissions (1910.1029)

Airborne Concentration Required Respirator 

≤ 1500 μg/m3 (micrograms 

per cubic meter) 

(1) Any particulate filter respirator for dust and mist except single-use 

respirator; or (2) Any particulate filter respirator or combination 

chemical cartridge and particulate filter respirator for coke oven 

emissions. 

Any concentrations 

(1) Type C supplied-air respirator [see page 360] operated in pressuredemand or continuous-flow mode; (2) Powered air-purifying particulate 

filter respirator for dust and mist; or (3) Powered air-purifying 

particulate filter respirator or combination chemical cartridge and 

particulate filter respirator for coke oven emissions. 
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Appendix E (Continued) 

OSHA Respirator Requirements for Selected Chemicals 

Cotton dust (1910.1043)

Airborne Concentration Required Respirator 

≤ 5 X PEL Disposable respirator* with a particulate filter. 

≤ 10 X PEL Quarter- or half-mask respirator, other than a disposable respirator, 

equipped with particulate filters. 

≤ 100 X PEL Full-facepiece respirator equipped with high-efficiency particulate 

filters**. 

> 100 X PEL Powered air-purifying respirator equipped with high-efficiency 

particulate filters. 

* A disposable respirator means the filter element is an inseparable part of the respirator. 

** A high-efficiency filter means a filter that is at least 99.97% efficient against mono-dispersed 

particles of 0.3 μm (micrometers) in diameter or higher. 

Notes: 

Self-contained breathing apparatus are not required but are permitted respirators. 

Supplied-air respirators are not required but are permitted under the following conditions: 

Cotton dust concentration not greater than 10X the PEL: Any supplied air respirator; not greater than 

100X the PEL: Any supplied-air respirator with full facepiece, helmet, or hood; greater than 100X the 

PEL: Supplied-air respirator operated in positive-pressure mode. 

1,2-Dibromo-3-chloropropane (1910.1044)

Airborne Concentration 

or Condition of Use Required Respirator 

≤ 10 ppb (parts per billion) (1) Any supplied-air respirator; or (2) any self-contained breathing 

apparatus. 

≤ 50 ppb (1) Any supplied-air respirator with full facepiece, helmet, or hood; or 

(2) any self-contained breathing apparatus with full facepiece. 

≤ 1,000 ppb Type C supplied-air respirator [see page 360] operated in pressuredemand or other positive-pressure or continuous-flow mode. 

≤ 2,000 ppb Type C supplied-air respirator [see page 360] with full facepiece 

operated in pressure-demand or other positive-pressure mode, or with 

full facepiece, helmet, or hood operated in continuous-flow mode. 

> 2,000 ppb or entry and 

escape from unknown 

concentrations 

(1) A combination respirator which includes a Type C supplied-air 

respirator [see page 360] with full facepiece operated in pressuredemand or other positive pressure or continuous-flow mode and an 

auxiliary self-contained breathing apparatus operated in pressuredemand or positive-pressure mode; or (2) Self-contained breathing 

apparatus with full facepiece operated in pressure-demand or other 

positive-pressure mode. 

Firefighting Self-contained breathing apparatus with full facepiece operated in 

pressure-demand or other positive-pressure mode. 
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Appendix E (Continued) 

OSHA Respirator Requirements for Selected Chemicals 

Ethylene oxide (1910.1047)

Airborne Concentration 

or Condition of Use Required Respirator 

≤ 50 ppm (parts per 

million) 

Full-facepiece respirator with ethylene oxide approved canister, front- or 

back-mounted. 

≤ 2,000 ppm 

(1) Positive-pressure supplied-air respirator equipped with full facepiece, 

hood, or helmet; or (2) Continuous-flow supplied-air respirator (positivepressure) equipped with hood, helmet, or suit. 

> 2,000 ppm or 

unknown concentrations 

(1) Positive-pressure self-contained breathing apparatus equipped with full 

facepiece; or (2) Positive-pressure full-facepiece supplied-air respirator 

equipped with an auxiliary positive-pressure self-contained breathing 

apparatus. 

Firefighting Positive-pressure self-contained breathing apparatus equipped with full 

facepiece. 

Escape Any respirator described above. 

Formaldehyde (1910.1048)

Airborne Concentration 

or Condition of Use Required Respirator 

≤ 7.5 ppm (parts per 

million) (10 X PEL) 

Full-facepiece respirator with cartridges or canisters specifically approved 

for protection against formaldehyde*. 

≤ 75 ppm (100 X PEL) 

(1) Full-face mask respirator with chin style or chest- or back-mounted 

type with industrial size canister specifically approved for protection 

against formaldehyde; or (2) Type C supplied-air respirator [see page 360], 

demand type or continuous flow type, with full facepiece, hood, or helmet. 

> 75 ppm (100 X PEL) or 

unknown concentrations 

(emergencies) 

(1) Self-contained breathing apparatus with positive-pressure fullfacepiece; or (2) Combination supplied-air, full-facepiece positive-pressure 

respirator with auxiliary self-contained air supply. 

Firefighting Self-contained breathing apparatus with positive-pressure in full facepiece. 

Escape 

(1) Self-contained breathing apparatus in demand or pressure-demand 

mode; or (2) Full-face mask respirator with chin-style or front- or backmounted type industrial size canister specifically approved for protection 

against formaldehyde. 

* A half-mask respirator with cartridges specifically approved for protection against formaldehyde can 

be substituted for the full-facepiece respirator providing that effective gas-proof goggles are provided 

and used in combination with the half-mask respirator. 
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Appendix E (Continued) 

OSHA Respirator Requirements for Selected Chemicals 

Lead (1910.1025 & 1926.62)

Respirator Requirements of 1910.1025 (General Industry Lead Standard) 

Airborne Concentration 

or Condition of Use Required Respirator 

≤ 0.5 mg/m3 (milligrams per 

cubic meter) (10 X PEL) Half-mask* air-purifying respirator equipped with high-efficiency filters**. 

≤ 2.5 mg/m3 (50 X PEL) Full-facepiece air-purifying respirator with high-efficiency filters**. 

≤ 50 mg/m3 (1000 X PEL) (1) Any powered air-purifying respirator with high-efficiency filters**; or 

(2) Half-mask* supplied-air respirator operated in positive-pressure mode. 

≤ 100 mg/m3 (2000 X PEL) Supplied-air respirators with full facepiece, hood, helmet, or suit, operated in 

positive-pressure mode. 

> 100 mg/m3, unknown 

concentration, or firefighting 

Full-facepiece, self-contained breathing apparatus operated in positivepressure mode. 

* Full facepiece is required if the lead aerosols cause eye or skin irritation at the use concentrations. 

** A high-efficiency filter means a filter that is at least 99.97% efficient against mono-dispersed particles of 

0.3 μm (micrometers) in diameter or higher. 

Respirator Requirements of 1926.62 (Construction Lead Standard) 

Airborne Concentration 

or Condition of Use Required Respirator 

≤ 0.5 mg/m3 (milligrams 

per cubic meter) 

(1) Half-mask* air-purifying respirator with high-efficiency filters**; or 

(2) Half-mask* supplied-air respirator operated in demand (negative 

pressure) mode. 

≤ 1.25 mg/m3 

(1) Loose-fitting hood or helmet powered air-purifying respirator with highefficiency filters**; or (2) Hood or helmet supplied-air respirator operated in 

a continuous-flow mode (e.g., Type CE abrasive blasting respirators [see 

page 360] operated in a continuous-flow mode). 

≤ 2.5 mg/m3

(1) Full-facepiece air-purifying respirator with high-efficiency filters**; 

(2) Tight-fitting powered air-purifying respirator with high-efficiency 

filters**; (3) Full-facepiece supplied-air respirator operated in demand mode; 

(4) Half-mask* or full-facepiece supplied-air respirator operated in a 

continuous-flow mode; or (5) Full-facepiece self-contained breathing 

apparatus operated in demand mode. 

≤ 50 mg/m3 Half-mask* supplied-air respirator operated in pressure-demand or other 

positive-pressure mode. 

≤ 100 mg/m3

Full-facepiece supplied-air respirator operated in pressure-demand or other 

positive-pressure mode (e.g., Type CE abrasive blasting respirators [see page 

360] operated in a continuous-flow mode). 

> 100 mg/m3

, unknown 

concentration, or firefighting 

Full-facepiece self-contained breathing apparatus in pressure-demand or 

other positive-pressure mode. 

* Full facepiece is required if the lead aerosols cause eye or skin irritation at the use concentrations. 

** A high-efficiency filter means a filter that is at least 99.97% efficient against mono-dispersed particles of 

0.3 μm (micrometers) in diameter or higher. 
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Appendix E (Continued) 

OSHA Respirator Requirements for Selected Chemicals 

Methylene chloride (1910.1052)

Airborne Concentration 

or Condition of Use Required Respirator 

≤ 625 ppm (parts 

per million) (25 X PEL) Continuous-flow supplied-air respirator, hood or helmet. 

≤ 1250 ppm 

(50 X PEL) 

(1) Full-facepiece supplied-air respirator operated in negative-pressure 

(demand) mode; or (2) Full-facepiece self-contained breathing apparatus 

operated in negative-pressure (demand) mode. 

≤ 5,000 ppm 

(200 X PEL) 

(1) Continuous-flow supplied-air respirator, full-facepiece; (2) Pressuredemand supplied-air respirator, full-facepiece; or (3) Positive-pressure fullfacepiece self-contained breathing apparatus. 

> 5,000 ppm or unknown 

concentration 

(1) Positive-pressure full-facepiece self-contained breathing apparatus; or 

(2) Full-facepiece pressure-demand supplied-air respirator with an 

auxiliary self-contained air supply. 

Firefighting Positive-pressure full-facepiece self-contained breathing apparatus. 

Emergency escape (1) Any continuous-flow or pressure-demand self-contained breathing 

apparatus; or (2) Gas mask with organic vapor canister. 

4,4'-Methylenedianiline (1910.1050 & 1926.60)

Airborne Concentration 

or Condition of Use Required Respirator 

≤ 10 X PEL Half-mask respirator with high-efficiency* cartridge**. 

≤ 50 X PEL Full-facepiece respirator with high-efficiency* cartridge or canister**. 

≤ 1,000 X PEL Full-facepiece powered air-purifying respirator with high-efficiency*

cartridge**. 

> 1,000 X PEL or 

unknown concentration 

(1) Self-contained breathing apparatus with full facepiece in positivepressure mode; or (2) Full-facepiece positive-pressure demand supplied-air 

respirator with auxiliary self-contained air supply. 

Escape 

(1) Any full-facepiece air-purifying respirator with high-efficiency*

cartridges**; or (2) Any positive-pressure or continuous-flow selfcontained breathing apparatus with full facepiece or hood. 

Firefighting Full-facepiece self-contained breathing apparatus in positive-pressure 

demand mode. 

* A high-efficiency filter means a filter that is at least 99.97% efficient against mono-dispersed 

particles of 0.3 μm (micrometers) in diameter or higher. 

** Combination High-Efficiency/Organic Vapor Cartridges shall be used whenever Methylenedianiline 

is in liquid form or a process requiring heat is used. 
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Appendix E (Continued) 

OSHA Respirator Requirements for Selected Chemicals 

Vinyl Chloride (1910.1017)

Airborne Concentration 

or Condition of Use Required Respirator 

≤ 10 ppm (parts per million) 

(1) Combination Type C supplied-air respirator [see below], demand 

type, with half facepiece, and auxiliary self-contained air supply; (2)

Type C supplied-air respirator [see below], demand type, with half 

facepiece; or (3) Any chemical cartridge respirator with an organic 

vapor cartridge which provides a service life of at least 1 hour for 

concentrations of vinyl chloride up to 10 ppm. 

≤ 25 ppm 

(1) Powered air-purifying respirator with hood, helmet, full or half 

facepiece, and a canister which provides a service life of at least 4 hours 

for concentrations of vinyl chloride up to 25 ppm; or (2) Gas mask with 

front- or back-mounted canister which provides a service life of at least 

4 hours for concentrations of vinyl chloride up to 25 ppm. 

≤ 100 ppm 

(1) Combination Type C supplied-air respirator [see below], demand 

type, with full facepiece, and auxiliary self-contained air supply; or (2)

Open-circuit self-contained breathing apparatus with full facepiece, in 

demand mode; or (3) Type C supplied-air respirator [see below], 

demand type, with full facepiece. 

≤ 1,000 ppm Type C supplied-air respirator [see below], continuous-flow type, with 

full or half facepiece, helmet, or hood. 

≤ 3,600 ppm 

(1) Combination Type C supplied-air respirator [see below], pressure 

demand type, with full or half facepiece, and auxiliary self-contained air 

supply; or (2) Combination type continuous-flow supplied-air respirator 

with full or half facepiece and auxiliary self-contained air supply. 

> 3,600 ppm or 

unknown concentration 

Open-circuit self-contained breathing apparatus, pressure-demand type, 

with full facepiece. 

Definitions for Type C and Type CE Respirators

The definitions below were obtained from the NIOSH Certified Equipment List, which is available on 

the NIOSH Web site (http://www.cdc.gov/niosh/npptl/topics/respirators/cel). 

Type C Respirator: An airline respirator, for entry into and escape from atmospheres not immediately 

dangerous to life or health, which consists of a source of respirable breathing air, a hose, a detachable 

coupling, a control valve, orifice, a demand valve or pressure demand valve, and arrangement for 

attaching the hose to the wearer and a facepiece, hood, or helmet. 

Type CE Respirator: A Type C supplied-air respirator equipped with additional devices designed to 

protect the wearer's head and neck against impact and abrasion from rebounding abrasive material, and 

with shielding material such as plastic, glass, woven wire, sheet metal, or other suitable material to 

protect the window(s) of facepieces, hoods, and helmets which do not unduly interfere with the 

wearer's vision and permit easy access to the external surface of such window(s) for cleaning.
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Appendix F 

MISCELLANEOUS NOTES

Benzene

 The final OSHA Benzene standard in 1910.1028 applies to all occupational exposures to 

benzene except some subsegments of industry where exposures are consistently under the action 

level (i.e., distribution and sales of fuels, sealed containers and pipelines, coke production, oil 

and gas drilling and production, natural gas processing, and the percentage exclusion for liquid 

mixtures); for the excepted subsegments, the benzene limits in Table Z-2 apply (i.e., an 8-hour 

TWA of 10 ppm, an acceptable ceiling of 25 ppm, and 50 ppm for a maximum duration of 10 

minutes as an acceptable maximum peak above the acceptable ceiling). 

Octachloronaphthalene 

Pentachloronaphthalene 

Tetrachloronaphthalene 

Trichloronaphthalene

 IDLH values for these four chloronaphthalene compounds are unknown. The 

Documentation for Immediately Dangerous to Life or Health Concentrations (NTIS Publication 

Number PB-94-195047) identified “Effective” IDLH values, based on analogy with other 

chloronaphthalenes and the then-effective NIOSH Respirator Decision Logic (DHHS [NIOSH] 

Publication No. 87-108; http://www.cdc.gov/niosh/docs/87-108). These values for respirator 

recommendations were determined by multiplying the NIOSH REL or OSHA PEL by an 

assigned protection factor of 10. This assigned protection factor was used during the Standards 

Completion Program for deciding when the “most protective” respirators should be used for these 

four chemicals. Listed below are the “Effective” IDLH values that were determined using 10 

times the REL or PEL for each chemical. For more information please consult the IDLH 

Documentation on the NIOSH Web site (http://www.cdc.gov/niosh/idlh/idlh-1.html). 

 Chemical NIOSH REL/OSHA PEL “Effective” IDLH (10 X REL/PEL) 

 Octachloronaphthalene TWA 0.1 mg/m3 * 1 mg/m3

 Pentachloronaphthalene TWA 0.5 mg/m3 5 mg/m3

 Tetrachloronaphthalene TWA 5 mg/m3 50 mg/m3

 Trichloronaphthalene TWA 2 mg/m3 20 mg/m3

* NIOSH also recommends a STEL of 0.3 mg/m3 for octachloronaphthalene; the TWA of 

0.1 mg/m3

 was used to calculate the “Effective” IDLH of 1 mg/m3. 

361
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Appendix G 

VACATED 1989 OSHA PELs 

(See pages xi and xii for an explanation of the vacated 1989 OSHA PELs.) 

Chemical Vacated 1989 OSHA PEL 

Acetaldehyde TWA 100 ppm (180 mg/m3), ST 150 ppm (270 mg/m3) 

Acetic anhydride C 5 ppm (20 mg/m3) 

Acetone TWA 750 ppm (1800 mg/m3), ST 1000 ppm (2400 mg/m3) 

Acetonitrile TWA 40 ppm (70 mg/m3), ST 60 ppm (105 mg/m3) 

Acetylsalicyclic acid TWA 5 mg/m3

Acrolein TWA 0.1 ppm (0.25 mg/m3), ST 0.3 ppm (0.8 mg/m3) 

Acrylamide TWA 0.03 mg/m3 [skin] 

Acrylic acid TWA 10 ppm (30 mg/m3) [skin] 

Allyl alcohol TWA 2 ppm (5 mg/m3), ST 4 ppm (10 mg/m3) [skin] 

Allyl chloride TWA 1 ppm (3 mg/m3), ST 2 ppm (6 mg/m3) 

Allyl glycidyl ether TWA 5 ppm (22 mg/m3), ST 10 ppm (44 mg/m3) 

Allyl propyl disulfide TWA 2 ppm (12 mg/m3), ST 3 ppm (18 mg/m3) 

α-Alumina TWA 10 mg/m3 (total), TWA 5 mg/m3 (resp) 

Aluminum (pyro powders & 

welding fumes, as Al) TWA 5 mg/m3

Aluminum (soluble 

salts & alkyls, as Al) TWA 2 mg/m3

Amitrole TWA 0.2 mg/m3

Ammonia ST 35 ppm (27 mg/m3) 

Ammonium chloride fume TWA 10 mg/m3, ST 20 mg/m3

Ammonium sulfamate TWA 10 mg/m3 (total), TWA 5 mg/m3 (resp) 

Aniline (and homologs) TWA 2 ppm (8 mg/m3) [skin] 

Atrazine TWA 5 mg/m3

Barium sulfate TWA 10 mg/m3

 (total), TWA 5 mg/m3 (resp) 

Benomyl TWA 10 mg/m3

 (total), TWA 5 mg/m3 (resp) 

Benzenethiol TWA 0.5 ppm (2 mg/m3) 

Bismuth telluride (doped with 

selenium sulfide, as Bi2Te3) TWA 5 mg/m3

Borates, tetra, sodium salts 

(Anhydrous) TWA 10 mg/m3

Borates, tetra, sodium salts 

(Decahydrate) TWA 10 mg/m3

Borates, tetra, sodium salts 

(Pentahydrate) TWA 10 mg/m3

Boron oxide TWA 10 mg/m3

Boron tribromide C 1 ppm (10 mg/m3) 

Bromacil TWA 1 ppm (10 mg/m3) 

Bromine TWA 0.1 ppm (0.7 mg/m3), ST 0.3 ppm (2 mg/m3) 
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Appendix G (Continued) 

VACATED 1989 OSHA PELs 

(See pages xi and xii for an explanation of the vacated 1989 OSHA PELs.)

Chemical Vacated 1989 OSHA PEL 

Bromine pentafluoride TWA 0.1 ppm (0.7 mg/m3) 

n-Butane TWA 800 ppm (1900 mg/m3) 

2-Butanone TWA 200 ppm (590 mg/m3

), ST 300 ppm (885 mg/m3) 

2-Butoxyethanol TWA 25 ppm (120 mg/m3) [skin] 

n-Butyl acetate TWA 150 ppm (710 mg/m3), ST 200 ppm (950 mg/m3) 

Butyl acrylate TWA 10 ppm (55 mg/m3) 

n-Butyl alcohol C 50 ppm (150 mg/m3) [skin] 

sec-Butyl alcohol TWA 100 ppm (305 mg/m3) 

tert-Butyl alcohol TWA 100 ppm (300 mg/m3), ST 150 ppm (450 mg/m3) 

n-Butyl glycidyl ether TWA 25 ppm (135 mg/m3) 

n-Butyl lactate TWA 5 ppm (25 mg/m3) 

n-Butyl mercaptan TWA 0.5 ppm (1.5 mg/m3) 

o-sec-Butylphenol TWA 5 ppm (30 mg/m3) [skin] 

p-tert-Butyltoluene TWA 10 ppm (60 mg/m3

), ST 20 ppm (120 mg/m3) 

Calcium cyanamide TWA 0.5 mg/m3

Caprolactam Dust: TWA 1 mg/m3

, ST 3 mg/m3

Vapor: TWA 5 ppm (20 mg/m3), ST 10 ppm (40 mg/m3) 

Captafol TWA 0.1 mg/m3

Captan TWA 5 mg/m3

Carbofuran TWA 0.1 mg/m3

Carbon dioxide TWA 10,000 ppm (18,000 mg/m3

) 

ST 30,000 ppm (54,000 mg/m3

) 

Carbon disulfide TWA 4 ppm (12 mg/m3), ST 12 ppm (36 mg/m3) [skin] 

Carbon monoxide TWA 35 ppm (40 mg/m3), C 200 ppm (229 mg/m3) 

Carbon tetrabromide TWA 0.1 ppm (1.4 mg/m3), ST 0.3 ppm (4 mg/m3) 

Carbon tetrachloride TWA 2 ppm (12.6 mg/m3) 

Carbonyl fluoride TWA 2 ppm (5 mg/m3), ST 5 ppm (15 mg/m3) 

Catechol TWA 5 ppm (20 mg/m3) [skin] 

Cesium hydroxide TWA 2 mg/m3

Chlorinated camphene TWA 0.5 mg/m3, ST 1 mg/m3 [skin] 

Chlorine TWA 0.5 ppm (1.5 mg/m3), ST 1 ppm (3 mg/m3) 

Chlorine dioxide TWA 0.1 ppm (0.3 mg/m3), ST 0.3 ppm (0.9 mg/m3) 

Chloroacetyl chloride TWA 0.05 ppm (0.2 mg/m3) 

o-Chlorobenzylidene 

malononitrile C 0.05 ppm (0.4 mg/m3

) [skin] 

Chlorodifluoromethane TWA 1000 ppm (3500 mg/m3) 

Chloroform TWA 2 ppm (9.78 mg/m3) 
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Appendix G (Continued) 

VACATED 1989 OSHA PELs 

(See pages xi and xii for an explanation of the vacated 1989 OSHA PELs.)

Chemical Vacated 1989 OSHA PEL 

1-Chloro-1-nitropropane TWA 2 ppm (10 mg/m3) 

Chloropentafluoroethane TWA 1000 ppm (6320 mg/m3) 

β-Chloroprene TWA 10 ppm (35 mg/m3) [skin] 

o-Chlorostyrene TWA 50 ppm (285 mg/m3

), ST 75 ppm (428 mg/m3) 

o-Chlorotoluene TWA 50 ppm (250 mg/m3) 

Chlorpyrifos TWA 0.2 mg/m3 [skin] 

Coal dust TWA 2 mg/m3

 (<5% SiO2) (resp dust) 

TWA 0.1 mg/m3

 (≥ 5% SiO2) (resp quartz) 

Cobalt metal dust & fume 

(as Co) TWA 0.05 mg/m3

Cobalt carbonyl (as Co) TWA 0.1 mg/m3

Cobalt hydrocarbonyl (as Co) TWA 0.1 mg/m3

Crag® herbicide TWA 10 mg/m3 (total), TWA 5 mg/m3 (resp) 

Crufomate TWA 5 mg/m3

Cyanamide TWA 2 mg/m3

Cyanogen TWA 10 ppm (20 mg/m3

) 

Cyanogen chloride C 0.3 ppm (0.6 mg/m3) 

Cyclohexanol TWA 50 ppm (200 mg/m3) [skin] 

Cyclohexanone TWA 25 ppm (100 mg/m3) [skin] 

Cyclohexylamine TWA 10 ppm (40 mg/m3

) 

Cyclonite TWA 1.5 mg/m3 [skin] 

Cyclopentane TWA 600 ppm (1720 mg/m3) 

Cyhexatin TWA 5 mg/m3

Decaborane TWA 0.3 mg/m3 (0.05 ppm), ST 0.9 mg/m3 (0.15 ppm) [skin]

Diazinon® TWA 0.1 mg/m3 [skin] 

2-N-Dibutylaminoethanol TWA 2 ppm (14 mg/m3) 

Dibutyl phosphate TWA 1 ppm (5 mg/m3), ST 2 ppm (10 mg/m3) 

Dichloroacetylene C 0.1 ppm (0.4 mg/m3) 

p-Dichlorobenzene TWA 75 ppm (450 mg/m3), ST 110 ppm (675 mg/m3) 

1,3-Dichloro5,5-dimethylhydantoin TWA 0.2 mg/m3

, ST 0.4 mg/m3

Dichloroethyl ether TWA 5 ppm (30 mg/m3), ST 10 ppm (60 mg/m3) [skin] 

Dichloromonofluoromethane TWA 10 ppm (40 mg/m3) 

1,1-Dichloro-1-nitroethane TWA 2 ppm (10 mg/m3) 

1,3-Dichloropropene TWA 1 ppm (5 mg/m3) [skin] 

2,2-Dichloropropionic acid TWA 1 ppm (6 mg/m3) 

Dicrotophos TWA 0.25 mg/m3 [skin] 
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Appendix G (Continued) 

VACATED 1989 OSHA PELs 

(See pages xi and xii for an explanation of the vacated 1989 OSHA PELs.)

Chemical Vacated 1989 OSHA PEL 

Dicyclopentadiene TWA 5 ppm (30 mg/m3) 

Dicyclopentadienyl iron TWA 10 mg/m3 (total), TWA 5 mg/m3 (resp) 

Diethanolamine TWA 3 ppm (15 mg/m3

) 

Diethylamine TWA 10 ppm (30 mg/m3), ST 25 ppm (75 mg/m3) 

Diethylenetriamine TWA 1 ppm (4 mg/m3) 

Diethyl ketone TWA 200 ppm (705 mg/m3) 

Diethyl phthalate TWA 5 mg/m3

Diglycidyl ether TWA 0.1 ppm (0.5 mg/m3) 

Diisobutyl ketone TWA 25 ppm (150 mg/m3) 

N,N-Dimethylaniline TWA 5 ppm (25 mg/m3), ST 10 ppm (50 mg/m3) [skin] 

Dimethyl-1,2-dibromo2,2-dichlorethyl phosphate TWA 3 mg/m3

 [skin] 

Dimethyl sulfate TWA 0.1 ppm (0.5 mg/m3) [skin] 

Dinitolmide TWA 5 mg/m3

Di-sec octyl phthalate TWA 5 mg/m3, ST 10 mg/m3

Dioxane TWA 25 ppm (90 mg/m3) [skin] 

Dioxathion TWA 0.2 mg/m3 [skin] 

Diphenylamine TWA 10 mg/m3

Dipropylene glycol methyl 

ether 

TWA 100 ppm (600 mg/m3) 

ST 150 ppm (900 mg/m3

) [skin] 

Dipropyl ketone TWA 50 ppm (235 mg/m3) 

Diquat (Diquat dibromide) TWA 0.5 mg/m3

Disulfiram TWA 2 mg/m3

Disulfoton TWA 0.1 mg/m3 [skin] 

2,6-Di-tert-butyl-p-cresol TWA 10 mg/m3

Diuron TWA 10 mg/m3

Divinyl benzene TWA 10 ppm (50 mg/m3) 

Emery TWA 10 mg/m3 (total), TWA 5 mg/m3 (resp) 

Endosulfan TWA 0.1 mg/m3 [skin] 

Epichlorohydrin TWA 2 ppm (8 mg/m3) [skin] 

Ethanolamine TWA 3 ppm (8 mg/m3), ST 6 ppm (15 mg/m3) 

Ethion TWA 0.4 mg/m3 [skin] 

Ethyl acrylate TWA 5 ppm (20 mg/m3), ST 25 ppm (100 mg/m3) [skin] 

Ethyl benzene TWA 100 ppm (435 mg/m3), ST 125 ppm (545 mg/m3) 

Ethyl bromide TWA 200 ppm (890 mg/m3), ST 250 ppm (1110 mg/m3) 

Ethylene chlorohydrin C 1 ppm (3 mg/m3) [skin] 

Ethylene dichloride TWA 1 ppm (4 mg/m3), ST 2 ppm (8 mg/m3) 
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Appendix G (Continued) 

VACATED 1989 OSHA PELs 

(See pages xi and xii for an explanation of the vacated 1989 OSHA PELs.)

Chemical Vacated 1989 OSHA PEL 

Ethylene glycol C 50 ppm (125 mg/m3) 

Ethylene glycol dinitrate ST 0.1 mg/m3 [skin] 

Ethyl ether TWA 400 ppm (1200 mg/m3), ST 500 ppm (1500 mg/m3) 

Ethylidene norbornene C 5 ppm (25 mg/m3) 

Ethyl mercaptan TWA 0.5 ppm (1 mg/m3) 

N-Ethylmorpholine TWA 5 ppm (23 mg/m3) [skin] 

Ethyl silicate TWA 10 ppm (85 mg/m3) 

Fenamiphos TWA 0.1 mg/m3 [skin] 

Fensulfothion TWA 0.1 mg/m3

Fenthion TWA 0.2 mg/m3 [skin] 

Ferbam TWA 10 mg/m3

Ferrovanadium dust TWA 1 mg/m3, ST 3 mg/m3

Fluorotrichloromethane C 1000 ppm (5600 mg/m3) 

Fonofos TWA 0.1 mg/m3 [skin] 

Formamide TWA 20 ppm (30 mg/m3), ST 30 ppm (45 mg/m3) 

Furfural TWA 2 ppm (8 mg/m3) [skin] 

Furfuryl alcohol TWA 10 ppm (40 mg/m3), ST 15 ppm (60 mg/m3) [skin] 

Gasoline TWA 300 ppm (900 mg/m3), ST 500 ppm (1500 mg/m3) 

Germanium tetrahydride TWA 0.2 ppm (0.6 mg/m3) 

Glutaraldehyde C 0.2 ppm (0.8 mg/m3) 

Glycerin (mist) TWA 10 mg/m3 (total), TWA 5 mg/m3 (resp) 

Glycidol TWA 25 ppm (75 mg/m3) 

Graphite (natural) TWA 2.5 mg/m3 (resp) 

Graphite (synthetic) TWA 10 mg/m3 (total), TWA 5 mg/m3 (resp) 

n-Heptane TWA 400 ppm (1600 mg/m3), ST 500 ppm (2000 mg/m3) 

Hexachlorobutadiene TWA 0.02 ppm (0.24 mg/m3) 

Hexachlorocyclopentadiene TWA 0.01 ppm (0.1 mg/m3) 

Hexafluoroacetone TWA 0.1 ppm (0.7 mg/m3) [skin] 

n-Hexane TWA 50 ppm (180 mg/m3) 

Hexane isomers (except 

n-Hexane) TWA 500 ppm (1800 mg/m3

), ST 1000 ppm (3600 mg/m3) 

2-Hexanone TWA 5 ppm (20 mg/m3) 

Hexone TWA 50 ppm (205 mg/m3), ST 75 ppm (300 mg/m3) 

Hexylene glycol C 25 ppm (125 mg/m3) 

Hydrazine TWA 0.1 ppm (0.1 mg/m3) [skin] 

Hydrogenated terphenyls TWA 0.5 ppm (5 mg/m3) 

Hydrogen bromide C 3 ppm (10 mg/m3) 
367

A

P 

P 

E 

N 

D 

I 

X 

G 

Appendix G (Continued) 

VACATED 1989 OSHA PELs 

(See pages xi and xii for an explanation of the vacated 1989 OSHA PELs.)

Chemical Vacated 1989 OSHA PEL 

Hydrogen cyanide ST 4.7 ppm (5 mg/m3) [skin] 

Hydrogen fluoride (as F) TWA 3 ppm, ST 6 ppm 

Hydrogen sulfide TWA 10 ppm (14 mg/m3), ST 15 ppm (21 mg/m3) 

2-Hydroxypropyl acrylate TWA 0.5 ppm (3 mg/m3) [skin] 

Indene TWA 10 ppm (45 mg/m3) 

Indium TWA 0.1 mg/m3

Iodoform TWA 0.6 ppm (10 mg/m3) 

Iron pentacarbonyl (as Fe) TWA 0.1 ppm (0.8 mg/m3), ST 0.2 ppm (1.6 mg/m3) 

Iron salts (soluble, as Fe) TWA 1 mg/m3

Isoamyl alcohol 

(primary & secondary) TWA 100 ppm (360 mg/m3

), ST 125 ppm (450 mg/m3) 

Isobutane TWA 800 ppm (1900 mg/m3) 

Isobutyl alcohol TWA 50 ppm (150 mg/m3) 

Isooctyl alcohol TWA 50 ppm (270 mg/m3) [skin] 

Isophorone TWA 4 ppm (23 mg/m3) 

Isophorone diisocyanate TWA 0.005 ppm, ST 0.02 ppm [skin] 

2-Isopropoxyethanol TWA 25 ppm (105 mg/m3) 

Isopropyl acetate TWA 250 ppm (950 mg/m3), ST 310 ppm (1185 mg/m3) 

Isopropyl alcohol TWA 400 ppm (980 mg/m3), ST 500 ppm (1225 mg/m3) 

Isopropylamine TWA 5 ppm (12 mg/m3), ST 10 ppm (24 mg/m3) 

N-Isopropylaniline TWA 2 ppm (10 mg/m3) [skin] 

Isopropyl glycidyl ether TWA 50 ppm (240 mg/m3), ST 75 ppm (360 mg/m3) 

Kaolin TWA 10 mg/m3 (total), TWA 5 mg/m3 (resp) 

Ketene TWA 0.5 ppm (0.9 mg/m3), ST 1.5 ppm (3 mg/m3) 

Magnesium oxide fume TWA 10 mg/m3

Malathion TWA 10 mg/m3 [skin] 

Manganese compounds 

and fume (as Mn) 

Compounds: C 5 mg/m3

Fume: TWA 1 mg/m3, ST 3 mg/m3

Manganese cyclopentadienyl

tricarbonyl (as Mn) TWA 0.1 mg/m3

 [skin] 

Manganese tetroxide (as Mn) TWA 1 mg/m3

Mercury compounds, as Hg 

[except (organo) alkyls] 

Hg Vapor: TWA 0.05 mg/m3 [skin] 

Non-alkyl compounds: C 0.1 mg/m3

 [skin] 

Mercury (organo) alkyl 

compounds (as Hg) TWA 0.01 mg/m3

, ST 0.03 mg/m3 [skin] 

Mesityl oxide TWA 15 ppm (60 mg/m3), ST 25 ppm (100 mg/m3) 

Methacrylic acid TWA 20 ppm (70 mg/m3) [skin] 

Methomyl TWA 2.5 mg/m3
368

A

P 

P 

E 

N 

D 

I 

X 

G 

Appendix G (Continued) 

VACATED 1989 OSHA PELs 

(See pages xi and xii for an explanation of the vacated 1989 OSHA PELs.)

Chemical Vacated 1989 OSHA PEL 

Methoxychlor TWA 10 mg/m3

4-Methoxyphenol TWA 5 mg/m3

Methyl acetate TWA 200 ppm (610 mg/m3), ST 250 ppm (760 mg/m3) 

Methyl acetylene-propadiene

mixture TWA 1000 ppm (1800 mg/m3

), ST 1250 ppm (2250 mg/m3) 

Methylacrylonitrile TWA 1 ppm (3 mg/m3) [skin] 

Methyl alcohol TWA 200 ppm (260 mg/m3), ST 250 ppm (325 mg/m3) [skin]

Methyl bromide TWA 5 ppm (20 mg/m3) [skin] 

Methyl chloride TWA 50 ppm (105 mg/m3), ST 100 ppm (210 mg/m3) 

Methyl chloroform TWA 350 ppm (1900 mg/m3), ST 450 ppm (2450 mg/m3) 

Methyl-2-cyanoacrylate TWA 2 ppm (8 mg/m3), ST 4 ppm (16 mg/m3) 

Methylcyclohexane TWA 400 ppm (1600 mg/m3) 

Methylcyclohexanol TWA 50 ppm (235 mg/m3

) 

o-Methylcyclohexanone TWA 50 ppm (230 mg/m3), ST 75 ppm (345 mg/m3) [skin] 

Methyl cyclopentadienyl 

manganese tricarbonyl (as Mn) TWA 0.2 mg/m3

 [skin] 

Methyl demeton TWA 0.5 mg/m3 [skin] 

4,4'-Methylenebis(2-chloroaniline) TWA 0.02 ppm (0.22 mg/m3

) [skin] 

Methylene bis (4-cyclohexylisocyanate) C 0.01 ppm (0.11 mg/m3

) [skin] 

Methyl ethyl ketone peroxide C 0.7 ppm (5 mg/m3) 

Methyl formate TWA 100 ppm (250 mg/m3), ST 150 ppm (375 mg/m3) 

Methyl iodide TWA 2 ppm (10 mg/m3) [skin] 

Methyl isoamyl ketone TWA 50 ppm (240 mg/m3) 

Methyl isobutyl carbinol TWA 25 ppm (100 mg/m3), ST 40 ppm (165 mg/m3) [skin] 

Methyl isopropyl ketone TWA 200 ppm (705 mg/m3) 

Methyl mercaptan TWA 0.5 ppm (1 mg/m3) 

Methyl parathion TWA 0.2 mg/m3 [skin] 

Methyl silicate TWA 1 ppm (6 mg/m3) 

α-Methyl styrene TWA 50 ppm (240 mg/m3

), ST 100 ppm (485 mg/m3) 

Metribuzin TWA 5 mg/m3

Mica TWA 3 mg/m3 (resp) 

Molybdenum (insoluble 

compounds, as Mo) TWA 10 mg/m3

Monocrotophos TWA 0.25 mg/m3

Monomethyl aniline TWA 0.5 ppm (2 mg/m3) [skin] 

Morpholine TWA 20 ppm (70 mg/m3), ST 30 ppm (105 mg/m3) [skin] 
369

A

P 

P 

E 

N 

D 

I 

X 

G 

Appendix G (Continued) 

VACATED 1989 OSHA PELs 

(See pages xi and xii for an explanation of the vacated 1989 OSHA PELs.)

Chemical Vacated 1989 OSHA PEL 

Naphthalene TWA 10 ppm (50 mg/m3), ST 15 ppm (75 mg/m3) 

Nickel metal & other 

compounds (as Ni) 

Metal & insoluble compounds: TWA 1 mg/m3

Soluble compounds: TWA 0.1 mg/m3

Nitric acid TWA 2 ppm (5 mg/m3), ST 4 ppm (10 mg/m3) 

p-Nitroaniline TWA 3 mg/m3 [skin] 

Nitrogen dioxide ST 1 ppm (1.8 mg/m3) 

Nitroglycerine ST 0.1 mg/m3 [skin] 

2-Nitropropane TWA 10 ppm (35 mg/m3) 

Nitrotoluene (o-, m-, p-isomers) TWA 2 ppm (11 mg/m3) [skin] 

Nonane TWA 200 ppm (1050 mg/m3) 

Octachloronaphthalene TWA 0.1 mg/m3, ST 0.3 mg/m3 [skin] 

Octane TWA 300 ppm (1450 mg/m3), ST 375 ppm (1800 mg/m3) 

Osmium tetroxide (as Os) TWA 0.002 mg/m3

 (0.0002 ppm), ST 0.006 mg/m3 (0.0006 ppm) 

Oxalic acid TWA 1 mg/m3

, ST 2 mg/m3

Oxygen difluoride C 0.05 ppm (0.1 mg/m3) 

Ozone TWA 0.1 ppm (0.2 mg/m3), ST 0.3 ppm (0.6 mg/m3) 

Paraffin wax fume TWA 2 mg/m3

Paraquat TWA 0.1 mg/m3 (resp) [skin] 

Pentaborane TWA 0.005 ppm (0.01 mg/m3), ST 0.015 ppm (0.03 mg/m3) 

Pentaerythritol TWA 10 mg/m3 (total), TWA 5 mg/m3 (resp) 

n-Pentane TWA 600 ppm (1800 mg/m3), ST 750 ppm (2250 mg/m3) 

2-Pentanone TWA 200 ppm (700 mg/m3), ST 250 ppm (875 mg/m3) 

Perchloryl fluoride TWA 3 ppm (14 mg/m3), ST 6 ppm (28 mg/m3) 

Petroleum distillates (naphtha) TWA 400 ppm (1600 mg/m3

) 

Phenothiazine TWA 5 mg/m3 [skin] 

Phenyl glycidyl ether TWA 1 ppm (6 mg/m3) 

Phenylhydrazine TWA 5 ppm (20 mg/m3), ST 10 ppm (45 mg/m3) [skin] 

Phenylphosphine C 0.05 ppm (0.25 mg/m3) 

Phorate TWA 0.05 mg/m3, ST 0.2 mg/m3 [skin] 

Phosdrin TWA 0.01 ppm (0.1 mg/m3), ST 0.03 ppm (0.3 mg/m3) [skin] 

Phosphine TWA 0.3 ppm (0.4 mg/m3), ST 1 ppm (1 mg/m3) 

Phosphoric acid TWA 1 mg/m3, ST 3 mg/m3

Phosphorus oxychloride TWA 0.1 ppm (0.6 mg/m3) 

Phosphorus pentasulfide TWA 1 mg/m3, ST 3 mg/m3

Phosphorus trichloride TWA 0.2 ppm (1.5 mg/m3), ST 0.5 ppm (3 mg/m3) 

Phthalic anhydride TWA 6 mg/m3 (1 ppm) 

m-Phthalodinitrile TWA 5 mg/m3
370

A

P 

P 

E 

N 

D 

I 

X 

G 

Appendix G (Continued) 

VACATED 1989 OSHA PELs 

(See pages xi and xii for an explanation of the vacated 1989 OSHA PELs.)

Chemical Vacated 1989 OSHA PEL 

Picloram TWA 10 mg/m3 (total), TWA 5 mg/m3 (resp) 

Piperazine dihydrochloride TWA 5 mg/m3

Platinum metal (as Pt) TWA 1 mg/m3

Portland cement TWA 10 mg/m3 (total), TWA 5 mg/m3 (resp) 

Potassium hydroxide TWA 2 mg/m3

Propargyl alcohol TWA 1 ppm (2 mg/m3) [skin] 

Propionic acid TWA 10 ppm (30 mg/m3) 

Propoxur TWA 0.5 mg/m3

n-Propyl acetate TWA 200 ppm (840 mg/m3), ST 250 ppm (1050 mg/m3) 

n-Propyl alcohol TWA 200 ppm (500 mg/m3), ST 250 ppm (625 mg/m3) 

Propylene dichloride TWA 75 ppm (350 mg/m3), ST 110 ppm (510 mg/m3) 

Propylene glycol dinitrate TWA 0.05 ppm (0.3 mg/m3) 

Propylene glycol 

monomethyl ether TWA 100 ppm (360 mg/m3

), ST 150 ppm (540 mg/m3) 

Propylene oxide TWA 20 ppm (50 mg/m3) 

n-Propyl nitrate TWA 25 ppm (105 mg/m3), ST 40 ppm (170 mg/m3) 

Resorcinol TWA 10 ppm (45 mg/m3), ST 20 ppm (90 mg/m3) 

Ronnel TWA 10 mg/m3

Rosin core solder, pyrolysis 

products (as formaldehyde) TWA 0.1 mg/m3

Rouge TWA 10 mg/m3 (total), TWA 5 mg/m3 (resp) 

Silica, amorphous TWA 6 mg/m3, TWA 0.1 mg/m3 (fused) 

Silica, crystalline 

(as respirable dust) 

TWA 0.05 mg/m3 (cristobalite), TWA 0.05 mg/m3 (tridymite),

TWA 0.1 mg/m3

 (quartz), TWA 0.1 mg/m3 (tripoli) 

Silicon TWA 10 mg/m3 (total), TWA 5 mg/m3 (resp) 

Silicon carbide TWA 10 mg/m3

 (total), TWA 5 mg/m3(resp) 

Silicon tetrahydride TWA 5 ppm (7 mg/m3) 

Soapstone TWA 6 mg/m3 (total), TWA 3 mg/m3 (resp) 

Sodium azide C 0.1 ppm (as HN3) [skin], C 0.3 mg/m3 (as NaN3) [skin] 

Sodium bisulfite TWA 5 mg/m3

Sodium fluoroacetate TWA 0.05 mg/m3, ST 0.15 mg/m3 [skin] 

Sodium hydroxide C 2 mg/m3

Sodium metabisulfite TWA 5 mg/m3

Stoddard solvent TWA 525 mg/m3 (100 ppm) 

Styrene TWA 50 ppm (215 mg/m3), ST 100 ppm (425 mg/m3) 

Subtilisins ST 0.00006 mg/m3 [60-minute] 

Sulfur dioxide TWA 2 ppm (5 mg/m3), ST 5 ppm (13 mg/m3) 
371

A

P 

P 

E 

N 

D 

I 

X 

G 

Appendix G (Continued) 

VACATED 1989 OSHA PELs 

(See pages xi and xii for an explanation of the vacated 1989 OSHA PELs.)

Chemical Vacated 1989 OSHA PEL 

Sulfur monochloride C 1 ppm (6 mg/m3) 

Sulfur tetrafluoride C 0.1 ppm (0.4 mg/m3) 

Sulfuryl fluoride TWA 5 ppm (20 mg/m3), ST 10 ppm (40 mg/m3) 

Sulprofos TWA 1 mg/m3

Talc TWA 2 mg/m3 (resp) 

Temephos TWA 10 mg/m3 (total), TWA 5 mg/m3 (resp) 

Terphenyl (o-, m-, p-isomers) C 5 mg/m3 (0.5 ppm) 

1,1,2,2-Tetrachloroethane TWA 1 ppm (7 mg/m3) [skin] 

Tetrachloroethylene TWA 25 ppm (170 mg/m3) 

Tetrahydrofuran TWA 200 ppm (590 mg/m3), ST 250 ppm (735 mg/m3) 

Tetrasodium pyrophosphate TWA 5 mg/m3

4,4'-Thiobis(6-tert-butyl- 

 m-cresol) TWA 10 mg/m3

 (total), TWA 5 mg/m3 (resp) 

Thioglycolic acid TWA 1 ppm (4 mg/m3) [skin] 

Thionyl chloride C 1 ppm (5 mg/m3) 

Tin (organic compounds, 

as Sn) TWA 0.1 mg/m3

 [skin] 

Tin(II) oxide (as Sn) TWA 2 mg/m3

Tin(IV) oxide (as Sn) TWA 2 mg/m3

Titanium dioxide TWA 10 mg/m3

Toluene TWA 100 ppm (375 mg/m3), ST 150 ppm (560 mg/m3) 

Toluene-2,4-diisocyanate TWA 0.005 ppm (0.04 mg/m3), ST 0.02 ppm (0.15 mg/m3) 

m-Toluidine TWA 2 ppm (9 mg/m3) [skin] 

p-Toluidine TWA 2 ppm (9 mg/m3) [skin] 

Tributyl phosphate TWA 0.2 ppm (2.5 mg/m3) 

Trichloroacetic acid TWA 1 ppm (7 mg/m3) 

1,2,4-Trichlorobenzene C 5 ppm (40 mg/m3) 

Trichloroethylene TWA 50 ppm (270 mg/m3), ST 200 ppm (1080 mg/m3) 

1,2,3-Trichloropropane TWA 10 ppm (60 mg/m3) 

1,1,2-Trichloro-1,2,2- 

trifluoroethane 

TWA 1000 ppm (7600 mg/m3) 

ST 1250 ppm (9500 mg/m3

) 

Triethylamine TWA 10 ppm (40 mg/m3), ST 15 ppm (60 mg/m3) 

Trimellitic anhydride TWA 0.005 ppm (0.04 mg/m3) 

Trimethylamine TWA 10 ppm (24 mg/m3), ST 15 ppm (36 mg/m3) 

1,2,3-Trimethylbenzene TWA 25 ppm (125 mg/m3) 

1,2,4-Trimethylbenzene TWA 25 ppm (125 mg/m3) 

1,3,5-Trimethylbenzene TWA 25 ppm (125 mg/m3) 
372

A

P 

P 

E 

N 

D 

I 

X 

G 

Appendix G (Continued) 

VACATED 1989 OSHA PELs 

(See pages xi and xii for an explanation of the vacated 1989 OSHA PELs.)

Chemical Vacated 1989 OSHA PEL 

Trimethyl phosphite TWA 2 ppm (10 mg/m3) 

2,4,6-Trinitrotoluene TWA 0.5 mg/m3 [skin] 

Triorthocresyl phosphate TWA 0.1 mg/m3 [skin] 

Triphenylamine TWA 5 mg/m3

Tungsten 

(insoluble compounds, as W) TWA 5 mg/m3

, ST 10 mg/m3

Tungsten 

(soluble compounds, as W) TWA 1 mg/m3

, ST 3 mg/m3

Tungsten carbide 

(cemented) 

TWA 5 mg/m3 (as W), ST 10 mg/m3 (as W), 

TWA 0.05 mg/m3

 (as Co), TWA 1 mg/m3 (as Ni) 

Uranium (insoluble 

compounds, as U) TWA 0.2 mg/m3

, ST 0.6 mg/m3

n-Valeraldehyde TWA 50 ppm (175 mg/m3) 

Vanadium dust TWA 0.05 mg V2O5/m3 (resp) 

Vanadium fume C 0.05 mg V2O5/m3

Vinyl acetate TWA 10 ppm (30 mg/m3), ST 20 ppm (60 mg/m3) 

Vinyl bromide TWA 5 ppm (20 mg/m3) 

Vinyl cyclohexene dioxide TWA 10 ppm (60 mg/m3) [skin] 

Vinylidene chloride TWA 1 ppm (4 mg/m3) 

VM & P Naphtha TWA 1350 mg/m3 (300 ppm), ST 1800 mg/m3 (400 ppm) 

Welding fumes TWA 5 mg/m3

Wood dust (all wood dusts 

except Western red cedar) TWA 5 mg/m3

, ST 10 mg/m3

Wood dust (Western red 

cedar) TWA 2.5 mg/m3

Xylene (o-, m-, p-isomers) TWA 100 ppm (435 mg/m3), ST 150 ppm (655 mg/m3) 

m-Xylene α,α'-diamine C 0.1 mg/m3 [skin] 

Xylidine TWA 2 ppm (10 mg/m3) [skin] 

Zinc chloride fume TWA 1 mg/m3, ST 2 mg/m3

Zinc oxide TWA 5 mg/m3

 (fume), ST 10 mg/m3 (fume), 

TWA 10 mg/m3

 (total dust), TWA 5 mg/m3 (resp dust) 

Zinc stearate TWA 10 mg/m3 (total), TWA 5 mg/m3 (resp) 

Zirconium compounds (as Zr) TWA 5 mg/m3, ST 10 mg/m3
373

INDICES
374

C 

A 

S 

I 

N 

D 

E 

X

CAS Number Index

CAS # Page CAS # Page CAS # Page CAS # Page 

50-00-0 148 71-23-8 268 75-45-6 63 78-92-2 40

50-29-3 88 71-36-3 39 75-47-8 173 78-93-3 36

50-78-2 6 71-43-2 26 75-50-3 319 79-00-5 315

53-96-3 5 71-55-6 203 75-52-5 230 79-01-6 316

54-11-5 224 72-20-8 127 75-55-8 270 79-04-9 61

55-38-9 144 72-43-5 195 75-56-9 270 79-06-1 7

55-63-0 229 74-83-9 201 75-61-6 109 79-09-4 266

56-23-5 55 74-86-2 5 75-63-8 318 79-10-7 8

56-38-2 241 74-87-3 203 75-65-0 40 79-20-9 197

56-81-5 152 74-88-4 211 75-69-4 146 79-24-3 228

57-14-7 115 74-89-5 200 75-71-8 98 79-27-6 6

57-24-9 286 74-90-8 168 75-74-1 303 79-34-5 300

57-50-1 288 74-93-1 214 75-86-5 4 79-41-4 194

57-57-8 265 74-96-4 134 75-99-0 102 79-44-7 114

57-74-9 57 74-97-5 63 76-01-7 242 79-46-9 231

58-89-9 186 74-98-6 263 76-03-9 314 80-62-6 214

60-11-7 112 74-99-7 197 76-06-2 67 81-81-2 334

60-29-7 140 75-00-3 135 76-11-9 299 83-26-1 259

60-34-4 211 75-01-4 330 76-12-0 299 83-79-4 275

60-57-1 105 75-02-5 331 76-13-1 317 84-15-1 297

61-82-5 15 75-04-7 133 76-14-2 102 84-66-2 108

62-53-3 18 75-05-8 4 76-15-3 67 84-74-2 95

62-73-7 103 75-07-0 2 76-22-2 49 85-00-7 123

62-74-8 283 75-08-1 141 76-38-0 196 85-44-9 257

62-75-9 232 75-09-2 208 76-44-8 157 86-50-0 23

63-25-2 51 75-12-7 149 77-47-4 159 86-88-4 20

64-17-5 132 75-15-0 53 77-73-6 104 87-68-3 158

64-18-6 149 75-21-8 139 77-78-1 116 87-86-5 243

64-19-7 2 75-25-2 34 78-00-2 302 88-72-2 233

67-56-1 200 75-28-5 176 78-10-4 142 88-89-1 259

67-63-0 181 75-31-0 181 78-30-8 322 89-72-5 43

67-64-1 3 75-34-3 99 78-34-2 121 90-04-0 18

67-66-3 65 75-35-4 332 78-59-1 179 91-20-3 221

67-72-1 159 75-38-7 332 78-82-0 178 91-59-8 222

68-11-1 306 75-43-4 100 78-83-1 177 91-94-1 97

68-12-2 115 75-44-5 253 78-87-5 268 92-06-8 297
375

C 

A 

S 

I 

N 

D 

E 

X 

CAS Number Index (Continued)

CAS # Page CAS # Page CAS # Page CAS # Page 

92-52-4 121 100-37-8 107 107-13-1 8 108-94-1 84 

92-67-1 14 100-41-4 133 107-15-3 136 108-95-2 248 

92-84-2 248 100-42-5 287 107-16-4 153 108-98-5 26 

92-87-5 27 100-44-7 28 107-18-6 10 109-59-1 180 

92-93-3 227 100-61-8 219 107-19-7 265 109-60-4 267 

92-94-4 298 100-63-0 251 107-20-0 60 109-66-0 244 

93-76-5 293 100-74-3 142 107-21-1 137 109-73-9 41 

94-36-0 27 101-14-4 207 107-22-2 345 109-74-0 44 

94-75-7 88 101-68-8 208 107-30-2 66 109-77-3 190 

95-13-6 171 101-77-9 209 107-31-3 210 109-79-5 43 

95-47-6 336 101-84-8 249 107-41-5 165 109-86-4 202 

95-48-7 79 102-54-5 104 107-49-3 296 109-87-5 199 

95-49-8 69 102-81-8 94 107-66-4 95 109-89-7 106 

95-50-1 96 104-94-9 19 107-87-9 245 109-94-4 140 

95-53-4 313 105-46-4 38 107-98-2 269 109-99-9 302 

95-63-6 320 105-60-2 50 108-03-2 231 110-12-3 212 

95-80-7 311 106-35-4 134 108-05-4 329 110-19-0 177 

96-12-8 93 106-42-3 336 108-10-1 164 110-43-0 201 

96-18-4 317 106-44-5 79 108-11-2 212 110-49-6 202 

96-22-0 108 106-46-7 97 108-18-9 110 110-54-3 162 

96-33-3 198 106-49-0 313 108-20-3 182 110-61-2 288 

96-45-7 139 106-50-3 249 108-21-4 180

96-69-5 306 106-51-4 272 108-24-7 3

110-62-3 327

345

97-77-8 124 106-87-6 331 108-31-6 189 110-66-7 245 

98-00-0 150 106-89-8 128 108-38-3 335 110-80-5 130 

98-01-1 150 106-92-3 11 108-39-4 78 110-82-7 83 

98-51-1 44 106-93-4 136 108-44-1 312 110-83-8 85 

98-82-8 81 106-97-8 35 108-46-3 273 110-86-1 272 

98-83-9 216 106-99-0 35 108-67-8 321 110-91-8 220 

98-95-3 226 108-83-8 110 111-15-9 131 

99-08-1 232

107-02-8 7

345 108-84-9 165

99-65-0 117 107-03-9 264 108-87-2 204

111-30-8 152

345

99-99-0 233 107-05-1 10 108-88-3 311 111-31-9 163 

100-00-5 227 107-06-2 137 108-90-7 62 111-40-0 107 

100-01-6 226 107-07-3 135 108-91-8 85 111-42-2 106 

100-25-4 118 107-12-0 266 108-93-0 84 111-44-4 100 
376

C 

A 

S 

I 

N 

D 

E 

X

CAS Number Index (Continued)

CAS # Page CAS # Page CAS # Page CAS # Page 

111-65-9 236 124-40-3 111 298-04-4 124 558-13-4 54

111-69-3 9 126-73-8 314 299-84-3 274 563-12-2 130

111-76-2 36 126-98-7 199 299-86-5 80 563-80-4 213

111-84-2 234 126-99-8 68 300-76-5 114 581-89-5 230

111-88-6 237 127-18-4 301 302-01-2 166 583-60-8 205

112-07-2 37 127-19-5 111 309-00-2 9 584-84-9 312

112-55-0 126 128-37-0 94 314-40-9 33 591-78-6 164

114-26-1 267 131-11-3 116 330-54-1 125 593-60-2 330

115-29-7 127 133-06-2 51 333-41-5 92 594-42-3 246

115-77-5 244 134-32-7 222 334-88-3 92 594-72-9 101

115-86-6 323 135-88-6 251 353-50-4 55 600-25-9 66

115-90-2 143 136-78-7 78 406-90-6 147 603-34-9 323

117-81-7 120 137-05-3 204 409-21-2 279 615-05-4 91

118-52-5 98 137-26-8 307 420-04-2 81 624-67-9 345

118-96-7 322 138-22-7 42 460-19-5 82 624-83-9 213

119-90-4 91 140-88-5 132 463-51-4 185 626-17-5 258

119-93-7 310 141-32-2 39 471-34-1 46 626-38-0 17

120-80-9 56 141-43-5 129 479-45-8 305 627-13-4 271

120-82-1 315 141-66-2 103 504-29-0 14 628-63-7 17

121-44-8 318 141-78-6 131 506-77-4 82 628-96-6 138

121-45-9 321 141-79-7 194 509-14-8 304 630-08-0 54

121-69-7 113 142-64-3 260 526-73-8 320 630-20-6 300

121-75-5 189 142-82-5 157 528-29-0 118 638-21-1 252

121-82-4 86 143-10-2 89 532-27-4 61 680-31-9 162

122-39-4 122 143-33-9 282 534-52-1 119 681-84-5 215

122-60-1 250 143-50-0 184 540-59-0 99 684-16-2 161

123-19-3 123 144-62-7 238 540-88-5 38 768-52-5 182

123-31-9 170 148-01-6 117 541-85-5 210 822-06-0 161

123-38-6 345 150-76-5 196 542-75-6 101 944-22-9 147

123-42-2 90 151-50-8 262 542-78-9 190 999-61-1 171

123-51-3 175 151-56-4 138 542-88-1 65 1120-71-4 264

123-72-8 345 151-67-7 156 542-92-7 86 1189-85-1 41

123-86-4 37 156-62-7 47 546-93-0 188 1300-73-8 337

123-91-1 120 287-92-3 87 552-30-7 319 1302-74-5 126

123-92-2 175 298-00-0 215 556-52-5 153 1303-86-2 31

124-38-9 53 298-02-2 252 557-05-1 339 1303-96-4 30
377

C 

A

S 

I 

N

D

E

X

CAS Number Index (Continued)

CAS # Page CAS # Page CAS # Page CAS # Page 

1304-82-1 29 1738-25-6 113 7439-92-1 185 7664-39-3 168 

1305-62-0 47 1746-01-6 298 7439-96-5 191 7664-41-7 15 

1305-78-8 48 1910-42-5 240 7439-97-6 193 7664-93-9 290 

1306-19-0 45 1912-24-9 23 7439-98-7 218 7681-49-4 283 

1918-02-1 258 7440-02-0 224 7681-57-4 284 1309-37-1 176

276 1929-82-4 69 7440-06-4 261 7697-37-2 225 

1309-48-4 188 2039-87-4 68 7440-16-6 273 7719-09-7 307 

1310-58-3 263 2104-64-5 129 7440-21-3 278 7719-12-2 257 

1310-73-2 284 2179-59-1 11 7440-22-4 280 7722-84-1 169 

1314-13-2 339 2234-13-1 235 7440-25-7 294 7722-88-5 304 

1314-62-1 328 2238-07-5 109 7440-31-5 308 7723-14-0 255 

1314-80-3 256 2425-06-1 50 7440-33-7 324 7726-95-6 33 

1317-35-7 192 2426-08-6 42 7440-36-0 19 7727-43-7 25 

1317-38-0 77 2551-62-4 289 7440-38-2 20 7773-06-0 16 

2698-41-1 62 7440-44-0 155 7778-18-9 49 

1317-65-3 2699-79-8 292 7440-41-7 28 7778-44-1 46 

46

186

192 2885-00-9 236 7440-43-9 45 7782-41-4 146 

1321-64-8 243 2917-26-2 160 7440-47-3 72 7782-42-5 154 

1321-65-9 316 2921-88-2 70 7440-48-4 75 7782-49-2 276 

1321-74-0 125 2971-90-6 73 7440-50-8 76 7782-50-5 59 

1330-43-4 30 3033-62-3 112 7440-58-6 156 7782-65-2 151 

1332-21-4 22 3173-72-6 221 7440-61-1 326 7783-06-4 170 

1332-58-7 183 3333-52-6 303 7440-65-5 338 7783-07-5 169 

1333-82-0 70 3383-96-8 296 7440-67-7 340 7783-41-7 239 

1333-86-4 52 3689-24-5 294 7440-74-6 172 7783-54-2 229 

1335-87-1 160 4016-14-2 183 7446-09-5 289 7783-60-0 291 

1335-88-2 301 4098-71-9 179 7553-56-2 172 7783-79-1 277 

1338-23-4 209 7572-29-4 96 7783-80-4 295 

1344-28-1 12

4170-30-3 80

345 7580-67-8 187 7784-42-1 21 

1344-95-2 48 5124-30-1 207 7616-94-6 246 7786-34-7 253 

1395-21-7 287 5332-52-5 326 7631-86-9 277 7789-30-2 35 

1455-21-6 235 5714-22-7 291 7631-90-5 282 7790-91-2 60 

1477-55-0 337 6032-29-7 176 7637-07-2 32 7803-51-2 254 

1563-66-2 52 6423-43-4 269 7646-85-7 338 7803-52-3 285 

1569-69-3 83 6923-22-4 219 7647-01-0 167 7803-62-5 279 

1639-09-4 158 7429-90-5 12 7664-38-2 254 8001-35-2 58 
378

C 

A 

S 

I 

N 

D 

E 

X

CAS Number Index (Continued)

CAS # Page CAS # Page CAS # Page CAS # Page 

8002-05-9 247 10026-13-8 256 13463-40-6 174 22224-92-6 143

8002-74-2 240 10028-15-6 239 13463-67-7 310 25013-15-4 333

8003-34-7 271 10035-10-6 167 13494-80-9 295 25321-14-6 119

8004-13-5 250 10049-04-4 59 13838-16-9 128 25376-45-8 311

8006-61-9 151 10102-43-9 225 14484-64-1 144 25639-42-3 205

8006-64-2 325 10102-44-0 228 14807-96-6 293 26499-65-0 260

8008-20-6 184 10210-68-1 74 14808-60-7 278 26628-22-8 281

8012-95-1 237 10294-33-4 32 14977-61-8 72 26952-21-6 178

8022-00-2 206 10361-37-2 24 15096-52-3 281 30525-89-4 345

8030-30-6 220 11097-69-1 64 16219-75-3 141 34590-94-8 122

8032-32-4 333 11107-01-0 325 16752-77-5 195 35400-43-2 292

8052-41-3 286 12001-26-2 217 16842-03-8 75 37329-49-0 325

8052-42-4 22 12079-65-1 191 17702-41-9 89 53469-21-9 64

8065-48-3 90 12108-13-3 206 17804-35-2 25 59355-75-8 198

9004-34-6 56 12125-02-9 16 18282-10-5 309 61788-32-7 166

9005-25-8 285 12179-04-3 31 19287-45-7 93 62765-93-9 223

9014-01-1 287 12604-58-9 145 19624-22-7 242 65996-93-2 74

10022-31-8 24 12718-69-3 325 20816-12-0 238 65997-15-1 262

10024-97-2 234 13121-70-5 87 21087-64-9 216 68476-85-7 187

10025-67-9 290 13397-24-5 155 21351-79-1 57 68956-68-3 329

10025-87-3 255 13463-39-3 223 21651-19-4 309 93763-70-3 247
379

D 

O 

T 

I 

N 

D 

X 

DOT ID Number Index

DOT ID # Page DOT ID # Page DOT ID # Page DOT ID # Page 

1001 5 1080 289 1163 115 1230 200

1005 15 1083 319 1165 120 1231 197

1008 32 1085 330 1170 132 1233 165

1009 318 1086 330 1171 130 1234 199

1010 35 1089 2 1172 131 1235 200

1011 35 1090 3 1173 131 1239 66

1013 53 1092 7 1175 133 1243 210

1016 54 1093 8 1184 137 1244 211

1017 59 1098 10 1185 138 1245 164

1018 63 1100 10 1188 202 1247 214

1020 67 1189 202 1249 245

1026 82

1104 17

175 1190 140 1259 223

1028 98 1193 36 1261 230

1029 100

1105 175

176 1198 148 1262 236

1032 111 1110 201 1199 150 1265 244

1036 133 1111 245 1203 151 

1037 135 1114 26 1204 229

1268 286

333

1040 139 1206 157 1274 268

1045 146

1120 39

40 1276 267

1048 167 1208 162

163 1279 268

1050 167

1123 37

38 1212 177 1280 270

1051 168 1125 41 1213 177 1282 272

1052 168 1131 53 1219 181 1292 142

1053 170 1134 62 1220 180 1294 311

1060 198 1135 135 1221 181 1296 318

1061 200 1143 80 1223 184 1297 319

1062 201 1145 83 1224 134 1299 325

1063 203 1146 87 1301 329

1064 214 1148 90 1303 332

E 

1067 228 1150 99 

1070 234 1154 106 1307 335

336

1155 140 1309 12

1156 108 1326 156

1157 110 1334 221

1075 

35

176

187

263 1158 110 1340 256

1076 253 1159 182

1228 

89

126

158

160

163

235

236

237

326

1344 259

1079 289 1160 111 1229 194 1346 278
380

D 

O 

T 

I 

N 

D 

E 

X

DOT ID Number Index (Continued)

DOT ID # Page DOT ID # Page DOT ID # Page DOT ID # Page 

1356 322 1605 136 1758 72 1920 234

1358 340 1613 168 1779 149 1921 270

1361 73 1648 4 1788 167 1932 340

1365 77 1649 302 1789 167 1940 306

1376 173 1650 222 1790 168 1941 109

1380 242 1651 20 1805 254 1958 102

1381 255 1654 224 1806 256 1959 332

1383 13 1660 225 1809 257 1969 176

1396 12 1661 226 1810 255 1978 263

1403 47 1662 226 1813 263 1986 265

1414 187 1814 263 1991 68

1446 24

1664 232

233 1823 284

1463 70 1669 242 1824 284 1993 

1510 304 1670 246 1828 290

42

84

179

1516 339 1671 248 1830 290 1994 174

1541 4 1673 249 1831 290 1999 22

1547 18 1680 262 1832 290 2008 340

1549 19 1687 281 1836 307 2014 169

1558 20 1689 282 1839 314 2015 169

1562 20 1690 283 1845 53 2023 128

1692 286 1846 55 2029 166 1564 24

25 1697 61 1848 266 2030 166

1566 28 1702 300 1860 331 2031 225

1567 28 1704 294 1865 271 2032 225

1573 46 1707 305 1868 89 2038 119

1578 227 1885 27 2047 101

1580 67

1708 312

313 1887 63 2048 104

1583 67 1709 311 1888 65 2049 125

1589 82 1710 316 1891 134 2053 212

1591 96 1711 337 1897 301 2054 220

1593 208 1715 3 1910 48 2055 287

1595 116 1738 28 1911 93 2056 302

1744 33 1915 84 2058 327 1597 117

118 1745 34 1916 100 2073 15

1598 119 1749 60 1917 132 2074 7

1600 119 1752 61 1918 81 

1604 136 1755 70 1919 198

2076 78

79
381

D 

O 

T 

I 

N 

D 

E 

X 

DOT ID Number Index (Continued)

DOT ID # Page DOT ID # Page DOT ID # Page DOT ID # Page 

2077 222 2304 221 2587 272 2762 57

2078 312 2312 248 2590 22 2763 23

2079 107 2315 64 2606 215 

2187 53 2321 315 2608 231

2765 88

293

2188 21 2325 321 2617 205 2771 307

2190 239 2329 321 2618 333 2781 123

2191 292 2331 338 2629 283 2782 123

2192 151 2337 26 2644 211 

2194 277 2347 43 2646 159

2195 295 2348 39 2647 190

2199 254 2357 85 2650 101

2201 234 2362 99 2658 276

2202 169 2363 141 2662 170

2203 279 2369 36 2667 44

2205 9 2397 213 2671 14

2209 148 2402 264 2672 15

2212 22 2404 266 2676 285

2214 257 2411 44 2681 57

2783 

23

70

92

103

124

189

215

219

241

253

296

2215 189 2417 55 2682 57 2789 2

2218 8 2418 291 2686 107 2790 2

2219 11 2420 161 2692 32 2805 187

2232 60 2693 282 2809 193

2238 69

2431 18

19 2710 123 2810 62

2249 65 2451 229 2713 74 2821 248

2253 113 2471 238 2717 49 2831 203

2256 85 2480 213 2842 228

2262 114 2491 129 2862 328

2265 115 2504 6 2871 19

2271 210 2515 34

2757 

25

51

52

195 2872 93

2279 158 2516 54 2873 94

2281 161 2531 194 2874 150

2284 178 2538 230 2876 273

2290 179 2545 156 2979 326

2294 219 2564 314 2984 169

2296 204 2570 45

2297 205 2572 251 3018 

2302 212 2574 322

2761 

9

58

88

105

127

157

186

195

215

252

296
DOT ID Number Index (Continued)

DOT ID # Page DOT ID # Page DOT ID # Page DOT ID # Page 

3051 13 3083 246 3364 259 9191 59

3054 83 3141 19 3413 262 9192 146

3064 229 3155 243 3414 282 9202 54

3079 199 3293 166 3453 254 9260 12

D 

O 

T 

I 

N 

D 

E 

X

382
Chemical, Synonym, and Trade Name Index

(Primary chemical names appear in blue text.) 

N 

A 

M 

E 

I 

N 

D 

E 

X 

Name Page Name Page 

AA 10 Acridine 74

AAF 5 Acroleic acid 8

2-AAF 5 Acrolein 7

Abate® 296 Acrylaldehyde 7

Acetaldehyde 2 Acrylamide 7

2-Acetaminofluorene 5 Acrylamide monomer 7

Acetic acid 2 Acrylic acid 8

Acetic acid (aqueous) 2 Acrylic aldehyde 7

Acetic acid anhydride 3 Acrylic amide 7

Acetic aldehyde 2 Acrylonitrile 8

Acetic anhydride 3 Acrylonitrile monomer 8

Acetic ester 131 Actinolite 22

Acetic ether 131 Actinolite asbestos 22

Acetic oxide 3 Adiponitrile 9

Acetone 3 AGE 11

Acetone cyanohydrin 4 Alcohol 132

Acetonitrile 4 Aldrin 9

3-(α-Acetonyl)-benzyl-4- Aliphatic petroleum naphtha 247

 hydroxycoumarin 334

Allyl alcohol 10

2-Acetoxybenzoic acid 6 Allyl aldehyde 7

o-Acetoxybenzoic acid 6 Allyl chloride 10

1-Acetoxyethylene 329 Allylene 197

2-Acetylaminofluorene 5 Allyl glycidyl ether 11

N-Acetyl-2-aminofluorene 5 Allylic alcohol 10

Acetylene 5 1-Allyloxy-2,3-epoxypropane 11

Acetylene black 52 Allyl propyl disulfide 11

Acetylene dichloride 99 Allyl trichloride 317

cis-Acetylene dichloride 99 Alumina 12

trans-Acetylene dichloride 99 α-Alumina 12

Acetylene tetrabromide 6 Aluminum 12

Acetylene tetrachloride 300 Aluminum metal 12

Acetyl mercaptan 306 Aluminum oxide [α-Alumina] 12

Acetyl oxide 3 Aluminum oxide [Emery] 126

2-Acetyl propane 213 Aluminum powder 12

Acetylsalicylic acid 6 Aluminum (pyro powders and 

Acheson graphite 155 welding fumes, as Al) 13

Acraldehyde 7

383
Chemical, Synonym, and Trade Name Index (Continued)

(Primary chemical names appear in blue text.) 

Name Page Name Page

Aluminum (soluble salts and Aminotoluene [o-Toluidine] 313

 alkyls, as Al) 13

Aminotoluene [p-Toluidine] 313

Aluminum trioxide [α-Alumina] 12 2-Aminotoluene 313

Aluminum trioxide [Emery] 126 4-Aminotoluene 313

Amidocyanogen 81 m-Aminotoluene 312

4-Aminoaniline 249 o-Aminotoluene 313

ortho-Aminoanisole 18 Aminotriazole 15

para-Aminoanisole 19 3-Aminotriazole 15

Aminobenzene 18 2-Amino-1,3,4-triazole 15

4-Aminobiphenyl 14 3-Amino-1,2,4-triazole 15

p-Aminobiphenyl 14 4-Amino-3,5,6-trichloropicolinic acid 258

1-Aminobutane 41 4-Amino-3,5,6-trichloro-2-picolinic acid 258

Aminocaproic lactam 50 Aminoxylene 337

Aminocyclohexane 85 Amitrole 15

Aminodimethylbenzene 337 Ammate® herbicide 16

4-Amino-6-(1,1-dimethylethyl)-3- Ammonia 15

 (methylthio)-1,2,4-triazin-5(4H)-one 216

Ammonium amidosulfonate 16

4-Aminodiphenyl 14 Ammonium chloride 16

p-Aminodiphenyl 14 Ammonium chloride fume 16

Aminoethane 133 Ammonium muriate fume 16

N-(2-Aminoethyl)-1,2-ethanediamine 107 Ammonium sulfamate 16

2-Aminoethanol 129 Amosite 22

β-Aminoethyl alcohol 129 AMS [Ammonium sulfamate] 16

bis(2-Aminoethyl)amine 107 AMS [α-Methyl styrene] 216

Aminoethylene 138 n-Amyl acetate 17

Aminohexahydrobenzene 85 sec-Amyl acetate 17

Aminomethane 200 Amyl acetic ester 17

1,3-bis(Aminomethyl)benzene 337 Amyl acetic ether 17

3-Amino-1-methylbenzene 312 Amyl aldehyde 327

1-Aminonaphthalene 222 Amyl ethyl ketone 210

2-Aminonaphthalene 222 Amyl hydrosulfide 245

para-Aminonitrobenzene 226 Amyl mercaptan 245

1-Aminophenylmethane 312 Amyl methyl ketone 201

2-Aminopropane 181 n-Amyl methyl ketone 201

2-Aminopyridine 14 Amyl sulfhydrate 245

α-Aminopyridine 14 AN 8

Aminotoluene [m-Toluidine] 312 Anhydrous ammonia 15

N 

A 

M 

E 

I 

N 

D 

E 

X

384
Chemical, Synonym, and Trade Name Index (Continued)

(Primary chemical names appear in blue text.) 

N 

A 

M 

E 

I 

N 

D 

E 

X 

Name Page Name Page 

Anhydrous borax 30 Aroclor® 1254 64

Anhydrous calcium sulfate 49 Arsenia 20

Anhydrous gypsum 49 Arsenic hydride 21

Anhydrous hydrogen bromide 167 Arsenic (inorganic compounds, 

Anhydrous hydrogen chloride 167 as As) 20

Anhydrous hydrogen fluoride 168 Arsenic metal 20

Anhydrous sulfate of lime 49 Arsenic (organic compounds, 

Aniline (and homologs) 18 as As) 21

Aniline oil 18 Arsenic trihydride 21

Anilinobenzene 122 Arseniuretted hydrogen 21

2-Anilinonaphthalene 251 Arsenous hydride 21

o-Anisidine 18 Arsine 21

p-Anisidine 19 Artificial barite 25

2-Anisidine 18 Artificial graphite 155

Anol 84 Asbestos 22

Anone 84 Asphalt fumes 22

Antabuse® 124 Asphaltum 22

Anthracite coal dust 73 Aspirin 6

Anthophyllite 22 Asymmetrical dichloroethane 99

Anthophyllite asbestos 22 Asymetrical trimethylbenzene 320

Anthracene 74 ATCP 258

Antimony 19 Atrazine 23

Antimony hydride 285 Aurum paradoxum 295

Antimony metal 19 Azabenzene 272

Antimony powder 19 Azide 281

Antimony trihydride 285 Azimethylene 92

ANTU 20 Azine 272

Aprocarb® 267 Azinphos-methyl 23

Aqua ammonia 15 Azirane 138

Aqua fortis 225 Aziridine 138

Aqueous acrylic acid 8 Azium 281

Aqueous ammonia 15 Azodrin® 219

Aqueous hydrogen bromide 167 Azomethylene 92

Aqueous hydrogen chloride 167 Azophos® 215

Aqueous hydrogen fluoride 168 Bacillus subtilis 287

Argentum 280 Bacillus subtilis BPN 287

Aroclor® 1242 64 Bacillus subtilis Carlsburg 287

385
Chemical, Synonym, and Trade Name Index (Continued)

(Primary chemical names appear in blue text.) 

Name Page Name Page

Banana oil 175 Benzol 26

Barite 25 Benzo(a)pyrene 74

Barium chloride (as Ba) 24 Benzoperoxide 27

Barium dichloride 24 1,4-Benzoquinone 272

Barium dinitrate 24 p-Benzoquinone 272

Barium(II) nitrate (1:2) 24 Benzoyl peroxide 27

Barium nitrate (as Ba) 24 Benzyl chloride 28

Barium salt of nitric acid 24 Beryllium & beryllium compounds 

Barium salt of sulfuric acid 25 (as Be) 28

Barium sulfate 25 Beryllium metal 28

Barytes 25 BGE 42

Basudin® 92 BHC 186

Battery acid 290 BHT 94

Baytex 144 4,4'-Bianiline 27

BCME 65 Bidrin® 103

Beet sugar 288 Bicyclopentadiene 104

Benomyl 25 Biethylene 35

Benzenamine 18 Biotite 217

Benzene 26 Biphenyl 121

Benzene chloride 62 4,4'-Biphenyldiamine 27

1,4-Benzenediamine 249 1,1'-Biphenyl-4,4'-diamine 27

1,3-Benzenedicarbonitrile 258 Bismuth sesquitelluride 29

1,2-Benzenedicarboxylic anhydride 257 Bismuth telluride 29

1,3-Benzenedimethanamine 337 Bismuth telluride, doped with 

1,2-Benzenediol 56 Selenium sulfide (as Bi2Te3) 29

o-Benzenediol 56 Bismuth telluride, undoped 29

1,3-Benzenediol 273 Bismuth tritelluride 29

m-Benzenediol 273 Bitumen 22

1,4-Benzenediol 170 Bituminous coal dust 73

p-Benzenediol 170 Bivinyl 35

Benzene hexahydride 83 Black copper oxide fume 77

Benzene tetrahydride 85 Black lead 154

Benzenethiol 26 Bladafum® 294

1,2,4-Benzenetricarboxylic anhydride 319 Bolstar® 292

Benzidine 27 Bottled gas 187

Benzidine-based dyes 27 Borates, tetra, sodium salts 

Benzoepin 127 (Anhydrous) 30

N 

A 

M 

E 

I 

N 

D 

E 

X

386
Chemical, Synonym, and Trade Name Index (Continued)

(Primary chemical names appear in blue text.) 

N 

A 

M 

E 

I 

N 

D 

E 

X 

Name Page Name Page 

Borates, tetra, sodium salts n-Butane 35

 (Decahydrate) 30

normal-Butane 35

Borates, tetra, sodium salts Butanedinitrile 288

 (Pentahydrate) 31

Butanenitrile 44

Borax 30 Butanethiol 43

Borax decahydrate 30 1-Butanethiol 43

Borax dehydrated 30 n-Butanethiol 43

Borax pentahydrate 31 1-Butanol 39

Boroethane 93 2-Butanol 40

Boron bromide 32 n-Butanol 39

Boron fluoride 32 2-Butanone 36

Boron hydride 93 2-Butanone peroxide 209

Boron oxide 31 2-Butenal 80

Boron tribromide 32 cis-Butenedioic anhydride 189

Boron trifluoride 32 2-Butoxyethanol 36

Bottled gas 263 2-Butoxyethanol acetate 37

BPL 265 2-Butoxyethyl acetate 37

Bromacil 33 Butter yellow 112

Bromine 33 Butyl acetate 37

Bromine fluoride 34 n-Butyl acetate 37

Bromine pentafluoride 34 sec-Butyl acetate 38

5-Bromo-3-sec-butyl-6-methyluracil 33 tert-Butyl acetate 38

Bromochloromethane 63 Butyl acrylate 39

1-Bromo-1-chloro-2,2,2-trifluoroethane 156 n-Butyl acrylate 39

2-Bromo-2-chloro-1,1,1-trifluoroethane 156 Butyl alcohol 39

Bromoethane 134 n-Butyl alcohol 39

Bromoethene 330 sec-Butyl alcohol 40

Bromoethylene 330 tert-Butyl alcohol 40

Bromoform 34 Butylamine 41

Bromomethane 201 n-Butylamine 41

5-Bromo-6-methyl-3- Butylated hydroxytoluene 94

 (1-methylpropyl)uracil 33

Butyl Cellosolve® 36

Bromotrifluoromethane 318 Butyl Cellosolve® acetate 37

Burned lime 48 4-t-Butyl-2-chlorophenylmethyl 

Burnt lime 48 methylphosphoramidate 80

Butadiene 35 tert-Butyl chromate 41

1,3-Butadiene 35 Butylene hydrate 40

387
Chemical, Synonym, and Trade Name Index (Continued)

(Primary chemical names appear in blue text.) 

Name Page Name Page

n-Butyl ester of acetic acid 37 Calcium cyanamide 47

sec-Butyl ester of acetic acid 38 Calcium hydrate 47

tert-Butyl ester of acetic acid 38 Calcium hydrosilicate 48

Butyl ester of acrylic acid 39 Calcium hydroxide 47

di-tert-Butyl ester of chromic acid 41 Calcium metasilicate 48

Butyl ester of 2-hydroxypropanoic acid 42 Calcium monosilicate 48

Butyl ester of lactic acid 42 Calcium oxide 48

Butyl ethanoate 37 Calcium salt (2:3) of arsenic acid 46

Butyl ethyl ketone 134 Calcium salt of carbonic acid 46

n-Butyl glycidyl ether 42 Calcium salt of silicic acid 48

Butyl glycol acetate 37 Calcium salt of sulfuric acid 49

Butyl hydride 35 Calcium silicate 48

Butyl lactate 42 Calcium sulfate 49

n-Butyl lactate 42 Calcium(II) sulfate dihydrate 155

n-Butyl mercaptan 43 Calcium sulfate hemihydrate 260

Butyl methyl ketone 164 2-Camphonone 49

Butyl oxitol 36 Camphor (synthetic) 49

2-sec-Butylphenol 43 Cane sugar 288

o-sec-Butylphenol 43 Caprolactam 50

Butyl phosphate 314 epsilon-Caprolactam 50

Butyl-2-propenoate 39 Captane 51

4-tert-Butyltoluene 44 Captafol 50

p-tert-Butyltoluene 44 Captan 51

tert-Butyl valone 259 Captofol 50

Butyrone 123 Carbamaldehyde 149

Butyronitrile 44 Carbaryl 51

n-Butyronitrile 44 Carbicron® 103

Cadmium dust (as Cd) 45 Carbimide 81

Cadmium fume (as Cd) 45 Carbinol 200

Cadmium metal 45 Carbodiimide 81

Cadmium monoxide 45 Carbofuran 52

Cadmium oxide fume 45 Carbolic acid 248

Calcium arsenate (as As) 46 Carbomethene 185

Calcium carbimide 47 2-Carbomethoxy-1-methylvinyl 

Calcium carbonate 46 dimethyl phosphate 253

Calcium carbonate [Limestone] 186 Carbonate magnesium 188

Calcium carbonate [Marble] 192 Carbon bisulfide 53

N 

A 

M 

E 

I 

N 

D 

E 

X

388
Chemical, Synonym, and Trade Name Index (Continued)

(Primary chemical names appear in blue text.) 

N 

A 

M 

E 

I 

N 

D 

E 

X 

Name Page Name Page 

Carbon black 52 Cemented WC 325

Carbon bromide 54 Cesium hydrate 57

Carbon chloride 55 Cesium hydroxide 57

Carbon difluoride oxide 55 Cesium hydroxide dimer 57

Carbon dioxide 53 Cetyl mercaptan 160

Carbon disulfide 53 CFC 113 317

Carbon fluoride oxide 55 Channel black 52

Carbon hexachloride 159 China clay 183

Carbonic acid gas 53 Chlorcyan 82

Carbon monoxide 54 Chlordan 57

Carbon nitride 82 Chlordane 57

Carbon oxide 54 Chlordano 57

Carbon oxychloride 253 Chlordecone 184

Carbon oxyfluoride 55 Chlorinated camphene 58

Carbon silicide 279 Chlorinated diphenyl oxide 58

Carbon tet 55 Chlorine 59

Carbon tetrabromide 54 Chlorine cyanide 82

Carbon tetrachloride 55 Chlorine dioxide 59

Carbonyl chloride 253 Chlorine fluoride 60

Carbonyl dichloride 253 Chlorine fluoride oxide 246

Carbonyl difluoride 55 Chlorine oxide 59

Carbonyl fluoride 55 Chlorine oxyfluoride 246

di-mu-Carbonylhexacarbonyldicobalt 74 Chlorine peroxide 59

Carborundum® 279 Chlorine trifluoride 60

Carboxyethane 266 Chloroacetaldehyde 60

4-Carboxyphthalic anhydride 319 Chloroacetaldehyde (40% aqueous 

Catechol 56 solution) 60

Caustic lime 47 2-Chloroacetaldehyde 60

Caustic soda 284 Chloroacetic acid chloride 61

CB 63 Chloroacetic chloride 61

CBM 63 2-Chloroacetophenone 61

Cellosolve® 130 α-Chloroacetophenone 61

Cellosolve® acetate 131 Chloroacetyl chloride 61

Cellulose 56 3-Chloroallyl chloride 101

Celtium 156 2-Chlorobenzalmalonitrile 62

Cement 262 Chlorobenzene 62

Cemented tungsten carbide 325 Chlorobenzol 62

389
Chemical, Synonym, and Trade Name Index (Continued)

(Primary chemical names appear in blue text.) 

Name Page Name Page

o-Chlorobenzylidene malononitrile 62 Chloromethyl ether 65

Chlorobromomethane 63 bis-Chloromethyl ether 65

Chlorobutadiene 68 Chloromethyl methyl ether 66

2-Chloro-1,3-butadiene 68 Chloromethyl phenyl ketone 61

Chlorocamphene 58 4-Chloronitrobenzene 227

Chlorochromic anhydride 72 p-Chloronitrobenzene 227

Chlorocyanide 82 1-Chloro-4-nitrobenzene 227

Chlorocyanogen 82 1-Chloro-1-nitropropane 66

1-Chloro-2,3-dibromopropane 93 Chloropentafluoroethane 67

Chlorodifluoromethane 63 Chloropicrin 67

2-Chloro-1-(difluoromethoxy)-1,1,2- Chloroprene 68

 trifluoroethane 128

β-Chloroprene 68

Chlorodimethyl ether 66 1-Chloro-2-propene 10

Chlorodiphenyl (42% chlorine) 64 3-Chloropropene 10

Chlorodiphenyl (54% chlorine) 64 3-Chloropropylene 10

1-Chloro-2,3-epoxypropane 128 2-Chloropropylene oxide 128

Chloroethane 135 γ-Chloropropylene oxide 128

2-Chloroethanal 60 Chlorpyrifos-ethyl 70

2-Chloroethanol 135 2-Chlorostyrene 68

Chloroethene 330 o-Chlorostyrene 68

1-Chloro-2-ethenylbenzene 68 ortho-Chlorostyrene 68

2-Chloroethyl alcohol 135 Chlorothene 203

2-Chloro-4-ethylamino-6- 2-Chlorotoluene 69

 isopropylamino-s-triazine 23

o-Chlorotoluene 69

Chloroethylene 330 α-Chlorotoluene 28

bis(2-Chloroethyl)ether 100 2-Chloro-6-trichloromethyl pyridine 69

6-Chloro-N-ethyl-N'-(1-methylethyl)- 2-Chloro-6-(trichloromethyl)pyridine 69

 1,3,5-triazine-2,4-diamine 23

Chlorotrifluoride 60

Chlorofluorocarbon 113 317 2-Chloro-1,1,2-trifluoroethyl 

Chloroform 65 difluoromethyl ether 128

Chloroformic acid dimethylamide 114 Chlorpyrifos 70

Chloroformyl chloride 253 Chrome 72

Chloromethane 203 Chromic acid (CrO3) 70

Chloromethoxymethane 66 Chromic acid and chromates 70

Chloromethylbenzene 28 Chromic anhydride 70

1-Chloro-2-methylbenzene 69 Chromic oxide 70

2-Chloro-1-methylbenzene 69 Chromic oxychloride 72

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390
Chemical, Synonym, and Trade Name Index (Continued)

(Primary chemical names appear in blue text.) 

N 

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Name Page Name Page 

Chromium 72 Confectioner's sugar 288

Chromium chloride oxide 72 Copper (dusts and mists, as Cu) 76

Chromium(II) compounds (as Cr) 71 Copper fume 77

Chromium(III) compounds (as Cr) 71 Copper fume (as Cu) 77

Chromium dichloride dioxide 72 Copper metal dusts 76

Chromium dioxide dichloride 72 Copper metal fumes 76

Chromium dioxychloride 72 Copper monoxide fume 77

Chromium metal 72 Copper(II) oxide 77

Chromium(VI) oxide (1:3) 70 Corn starch 285

Chromium trioxide 70 Corundum 126

Chromyl chloride 72 Cotton dust (raw) 77

Chrysene 74 Coyden® 73

Chrysotile 22 Crag® herbicide 78

CI-2 206 Crag® herbicide No. 1 78

Cinerin I or II 271 2-Cresol 79

Clay 183 3-Cresol 78

Clopidol 73 4-Cresol 79

bis-CME 65 m-Cresol 78

CMME 66 meta-cresol 78

Coal dust 73 o-Cresol 79

Coal mine dust 73 ortho-Cresol 79

Coal tar 74 p-Cresol 79

Coal tar pitch volatiles 74 para-Cresol 79

Cobalt carbonyl (as Co) 74 Creosote 74

Cobalt hydrocarbonyl (as Co) 75 m-Cresylic acid 78

Cobalt metal dust 75 o-Cresylic acid 79

Cobalt metal dust and fume (as Co) 75 p-Cresylic acid 79

Cobalt metal fume 75 Cristobalite 278

Cobalt octacarbonyl 74 Crocidolite 22

Cobalt tetracarbonyl dimer 74 Crotonaldehyde 80

Coke oven emissions 76 Crude solvent coal tar naphtha 220

Colloidal manganese 191 Crufomate 80

Colloidal mercury 193 Cryocide 281

Cologne spirit 132 Cryodust 281

Columbian spirits 200 Cryolite 281

Combustion Improver-2 206 CS 62

Compressed petroleum gas 187 Cucumber dust 46

391
Chemical, Synonym, and Trade Name Index (Continued)

(Primary chemical names appear in blue text.) 

Name Page Name Page

Cumene 81 Cyclopentadienylmanganese 

psi-Cumene 320 tricarbonyl 191

Cummingtonite-grunerite 22 Cyclopentadienyl tricarbonyl 

Cumol 81 manganese

191

Cupric oxide 77 Cyclopentane 87

Cyanamide 81 Cyclotrimethylenetrinitramine 86

Cyanamide [Calcium cyanamide] 47 Cyhexatin 87

Cyanamide (Hydrogen cyanamide) 81 2,4-D 88

Cyanoacetonitrile 190 DAB 112

Cyanoethane 266 DACPM 207

Cyanoethylene 8 Dactin 98

Cyanogen 82 Dalapon 102

Cyanogen chloride 82 Dasanit® 143

Cyanogen nitride 81 DBCP 93

Cyanohydrin-2-propanone 4 DBP 95

Cyanomethane 4 DCA 96

Cyanomethanol 153 o-DCB 96

1-Cyanopropane 44 p-DCB 97

2-Cyano-2-propanol 4 1,1-DCE 332

2-Cyanopropene-1 199 DCP 101

2-Cyano-1-propene 199 DCPD 104

1,4-Cyclohexadiene dioxide 272 DDH 98

Cyclohexane 83 DDT 88

Cyclohexanethiol 83 p,p'-DDT 88

Cyclohexanol 84 DDVP 103

Cyclohexanone 84 DEA 106

Cyclohexene 85 Decaborane 89

Cyclohexyl alcohol 84 Decaboron tetradecahydride 89

Cyclohexylamine 85 Decachlorooctahydro-1,3,4-methenoCyclohexyl ketone 84 2H-cyclobuta(cd)pentalen-2-one 184

Cyclohexylmercaptan 83 Decachlorooctahydro-kepone-2-one 184

Cyclohexylmethane 204 Decachlorotetrahydro-4,7- 

Cyclohexylthiol 83 methanoindeneone 184

Cyclonite 86 1-Decanethiol 89

Cyclopentadiene 86 Decylmercaptan 89

1,3-Cyclopentadiene 86 n-Decylmercaptan 89

bis(Cyclopentadienyl)iron 104 DEHP 120

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392
Chemical, Synonym, and Trade Name Index (Continued)

(Primary chemical names appear in blue text.) 

N 

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Name Page Name Page 

DEK 108 Dibenzothiazine 248

Delnav® 121 Dibenzoyl peroxide 27

Demeton 90 DIBK 110

Demeton methyl 206 Diborane 93

DEP 108 Diboron hexahydride 93

DETA 107 Dibrom® 114

DGE 109 Dibromochloropropane 93

Diacetone 90 1,2-Dibromo-3-chloropropane 93

Diacetone alcohol 90 1,2-Dibromo-2,2-dichloroethyl 

Diallyl ether dioxide 109 dimethyl phosphate 114

Diamine 166 Dibromodifluoromethane 109

2,4-Diaminoanisole (and its salts) 91 1,2-Dibromoethane 136

1,4-Diaminobenzene 249 Dibutyl acid o-phosphate 95

p-Diaminobenzene 249 Dibutylaminoethanol 94

4,4'-Diaminobiphenyl 27 2-Dibutylaminoethanol 94

4,4'-Diamino-3,3'-dichlorobiphenyl 97 2-N-Dibutylaminoethanol 94

2,2'-Diaminodiethylamine 107 2-Di-N-butylaminoethanol 94

4,4'-Diamino-3,3'-dimethylbiphenyl 310 2-Di-N-butylaminoethyl alcohol 94

p-Diaminodiphenyl 27 Dibutylated hydroxytoluene 94

4,4'-Diaminodiphenylmethane 209 Dibutyl-1,2-benzene-dicarboxylate 95

para, para'-Diaminodiphenyl-methane 209 2,6-Di-tert-butyl-p-cresol 94

Diaminoditolyl 310 N,N-Dibutylethanolamine 94

1,2-Diaminoethane 136 Di-n-butyl hydrogen phosphate 95

1,3-Diamino-4-methoxy benzene 91 Dibutyl phosphate 95

Diaminotoluene 311 Dibutyl phosphoric acid 95

Dianilinomethane 209 Dibutyl phthalate 95

Dianisidine 91 Di-n-butyl phthalate 95

3,3'-Dianisidine 91 Dichloroacetylene 96

o-Dianisidine 91 1,2-Dichlorobenzene 96

Diatomaceous earth 277 1,4-Dichlorobenzene 97

Diatomaceous silica 277 o-Dichlorobenzene 96

Diatomite 277 ortho-Dichlorobenzene 96

Diazide® 92 p-Dichlorobenzene 97

Diazinon® 92 para-Dichlorobenzene 97

Diazirine 92 3,3'-Dichlorobenzidine (and its 

Diazomethane 92 salts) 97

Dibasic zinc stearate 339 Dichlorobenzidine base 97

393
Chemical, Synonym, and Trade Name Index (Continued)

(Primary chemical names appear in blue text.) 

Name Page Name Page

o,o'-Dichlorobenzidine 97 2-(2,4-Dichlorophenoxy)ethyl sodium 

o-Dichlorobenzol 96 sulfate 78

3,3'-Dichlorobiphenyl-4,4'-diamine 97 Dichloro-1,2-propane 268

3,3'-Dichloro-4,4'-biphenyldiamine 97 1,2-Dichloropropane 268

3,3'-Dichloro-4,4'-diaminobiphenyl 97 2,2-Dichloropropanoic acid 102

3,3'-Dichloro-4,4'- 1,3-Dichloropropene 101

 diaminodiphenylmethane 206

1,3-Dichloro-1-propene 101

2,2'-Dichlorodiethyl ether 100 2,2-Dichloropropionic acid 102

2,2-Dichloro-1,1-difluoroethyl methyl α,α-Dichloropropionic acid 102

 ether 196

1,3-Dichloropropylene 101

Dichlorodifluoromethane 98 1,2-Dichlorotetrafluoroethane 102

2,2-Dichloro-1,1-difluoro-1- Dichlorotetrafluoroethane 102

 methoxyethane 196

2,2-Dichlorovinyl dimethyl phosphate 103

Dichlorodimethyl ether 65 Dichlorvos 103

1,3-Dichloro-5,5-dimethylhydantoin 98 Dicobalt carbonyl 74

3,5-Dichloro-2,6-dimethyl-4-pyridinol 73 Dicobalt octacarbonyl 74

Dichlorodioxochromium 72 Dicrotophos 103

Dichlorodiphenyltrichloroethane 88 Dicyan 82

1,1-Dichloroethane 99 1,3-Dicyanobenzene 258

1,2-Dichloroethane 137 m-Dicyanobenzene 258

1,1-Dichloroethene 332 1,4-Dicyanobutane 9

1,1-Dichloroethylene 332 1,2-Dicyanoethane 288

1,2-Dichloroethylene 99 Dicyanogen 82

sym-Dichloroethylene 99 Dicyanomethane 190

Dichloroethyl ether 100 Dicyclohexylmethane 4,4'- 

2,2'-Dichloroethyl ether 100 diisocyanate 207

Dichloroethyne 96 Dicyclopentadiene 104

Dichlorofluoromethane 100 1,3-Dicyclopentadiene dimer 104

Dichloromethane 208 Dicyclopentadienyl iron 104

Dichloromethyl ether 65 Dieldrin 105

Dichloromonofluoromethane 100 Di(2,3-epoxypropyl) ether 109

Dichloronitroethane 101 Diesel exhaust 105

1,1-Dichloro-1-nitroethane 101 Diethamine 106

3-(3,4-Dichlorophenyl)-1,1- Diethanolamine 106

 dimethylurea 125

Diethyl 35

Dichlorophenoxyacetic acid 88 Diethylamine 106

2,4-Dichlorophenoxyacetic acid 88 N,N-Diethylamine 106

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394
Chemical, Synonym, and Trade Name Index (Continued)

(Primary chemical names appear in blue text.) 

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Diethylaminoethanol 107 O,O-Diethyl O-3,5,6-trichloro-2-pyridyl 

2-Diethylaminoethanol 107 phosphorothioate 70

2-Diethylaminoethyl alcohol 107 Difluorine monoxide 239

Diethyl benzene 125 Difluorochloromethane 63

Diethyl (dimethoxyphosphinothioylthio) Difluorodibromomethane 109

 succinate 189

Difluorodichloromethane 98

Diethylene dioxide 120 1,1-Difluoroethene 332

Diethylene ether 120 Difluoro-1,1-ethylene 332

Diethylene imidoxide 220 1,1-Difluoroethylene 332

Diethylene oxide 302 1,2-Difluoro-1,1,2,2-tetrachloroethane 299

Diethylene oximide 220 2,2-Difluoro-1,1,1,2-tetrachloroethane 299

Diethylenetriamine 107 Difolatan® 50

Diethyl ester of phthalic acid 108 Diglycidyl ether 109

N,N-Diethylethanolamine 107 2,3-Dihydro-2,2-dimethyl-7- 

Diethyl ether 140 benzofuranyl methylcarbamate 52

O-O-Diethyl-O(and S)-2-(ethylthio) Dihydroxybenzene 170

 ethyl phosphorothioate mixture 90

1,2-Dihydroxybenzene 56

O,O-Diethyl S-2-(ethylthio)-ethyl 1,3-Dihydroxybenzene 273

 phosphorodithioate 124

1,4-Dihydroxybenzene 170

O,O-Diethyl S-(ethylthio) m-Dihydroxybenzene 273

 methylphosphorodithioate 252

o-Dihydroxybenzene 56

O,O-Diethyl S- 2,2'-Dihydroxydiethyamine 106

 ethylthiomethylthiothionophosphate 252

1,2-Dihydroxyethane 137

Di(2-ethylhexyl) phthalate 120 Di(2-hydroxyethyl)amine 106

Diethyl-(2-hydroxyethyl)amine 107 2,4-Dihydroxy-2-methylpentane 165

O,O-Diethyl-O-2-isopropyl-4-methyl-6- Diisobutyl ketone 110

 pyrimidinyl phosphorothioate 92

1,6-Diisocyanatohexane 161

Diethyl ketone 108 1,5-Diisocyanatonaphthalene 221

Diethylmethylmethane 163 Diisopropyl 163

O,O-Diethyl O-(p-methylsulfinyl) sym-Diisopropyl acetone 110

 phenyl)phosphorothioate 143

Diisopropylamine 110

O,O-Diethyl-O(p-nitrophenyl) Diisopropyl ether 182

 phosphorothioate 241

Diisopropyl oxide 182

Diethyl oxide 140 Dimazine 115

Diethyl parathion 241 3,3'-Dimethoxybenzidine 91

Diethyl phthalate 108 p,p'-Dimethoxydiphenyltrichloroethane 195

bis(Diethylthiocarbamoyl) disulfide 124 Dimethoxymethane 199

395
Chemical, Synonym, and Trade Name Index (Continued)

(Primary chemical names appear in blue text.) 

Name Page Name Page

Dimethyl acetamide 111 2-Dimethyl-cis-2-dimethylcarbamoylN,N-Dimethyl acetamide 111 1-methylvinylphosphate 103

Dimethylacetone 108 3,3'-Dimethyl-4,4'-diphenyldiamine 310

Dimethylamine 111 tris(Dimethyldithiocarbamato)iron 144

Dimethylamine (anhydrous) 111 Dimethyleneimine 138

Dimethylaminobenzene 337 Dimethylene oxide 139

4-Dimethylaminoazobenzene 112 Dimethylenimine 138

p-Dimethylaminoazobenzene 112 Dimethyl ester of 

N,N-Dimethyl-4-aminoazobenzene 112 1,2-benzenedicarboxylic acid 116

bis(2-(Dimethylamino)ethyl)ether 112 Dimethyl ester of sulfuric acid 116

Dimethylaminopropionitrile 113 O,O-Dimethyl 2-ethylmercaptoethyl 

3-(Dimethylamino)propionitrile 113 thiophosphate 206

N,N-Dimethylamino-3-propionitrile 113 Dimethyl formamide 115

N,N-Dimethylaniline 113 Dimethylformamide 115

Dimethylaniline [N,N-Dimethylaniline] 113 N,N-Dimethylformamide 115

Dimethylaniline [Xylidine] 337 2,6-Dimethyl-4-heptanone 110

2,4-Dimethylaniline 337 1,1-Dimethylhydrazine 115

1,2-Dimethylbenzene 336 Dimethylketone 3

1,3-Dimethylbenzene 335 N,N-Dimethylmethanamine 319

1,4-Dimethylbenzene 336 Dimethyl methane 263

N,N-Dimethylbenzeneamine 113 O,O-Dimethyl O-3-methyl-4- 

3,3'-Dimethylbenzidine 310 methylthiophenyl phosphorothioate 144

1,1'-Dimethyl-4,4'-bipyridinium Dimethylnitromethane 231

 dichloride 240

O,O-Dimethyl-O-pN,N'-Dimethyl-4,4'-bipyridinium nitrophenylphosphorothioate 215

 dichloride 240

Dimethylnitrosoamine 232

2,2-Dimethylbutane 163 N,N-Dimethylnitrosamine 232

2,3-Dimethylbutane 163 O,O-Dimethyl-S-4-oxo-1,2,3-benzotri1,3-Dimethylbutyl acetate 165 azin-3(4H)-ylmethyl phosphorodithioate 23

Dimethylcarbamic chloride 114 N,N-Dimethylphenylamine 113

Dimethyl carbamoyl chloride 114 Dimethylphthalate 116

N,N-Dimethylcarbamoyl chloride 114 Dimethyl sulfate 116

Dimethyl carbinol 181 Dimethylsulfate 116

Dimethylchloroether 66 bis(Dimethylthiocarbamoyl) disulfide 307

Dimethyl-1,2-dibromo-2,2- O,O-Dimethyl O-(2,4,5- 

 dichlorethyl phosphate 114 trichlorophenyl) phosphorothioate 274

Dinile 288

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396
Chemical, Synonym, and Trade Name Index (Continued)

(Primary chemical names appear in blue text.) 

N 

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Name Page Name Page 

Dinitolmide 117 N,N-Diphenylaniline 323

1,2-Dinitrobenzene 118 N,N-Diphenylbenzenamine 323

1,3-Dinitrobenzene 117 1,2-Diphenylbenzene 297

1,4-Dinitrobenzene 118 1,3-Diphenylbenzene 297

m-Dinitrobenzene 117 1,4-Diphenylbenzene 298

meta-Dinitrobenzene 117 m-Diphenylbenzene 297

o-Dinitrobenzene 118 o-Diphenylbenzene 297

ortho-Dinitrobenzene 118 p-Diphenylbenzene 298

p-Dinitrobenzene 118 Diphenyl ether 249

para-Dinitrobenzene 118 4,4'-Diphenylmethanediamine 209

Dinitro-o-cresol 119 4,4'-Diphenylmethane diisocyanate 208

4,6-Dinitro-o-cresol 119 Diphenyl oxide 249

Dinitrogen monoxide 234 Diphenyl oxide-diphenyl mixture 250

Dinitrogen tetroxide 228 Dipropylene glycol methyl ether 122

3,5-Dinitro-2-hydroxytoluene 119 Dipropylene glycol monomethyl ether 122

4,6-Dinitro-2-methyl phenol 119 Dipropyl ketone 123

3,5-Dinitro-o-toluamide 117 Diquat dibromide 123

Dinitrotoluene 119 Diquat (Diquat dibromide) 123

Dinitrotoluol 119 Direx® 125

Di-sec octyl phthalate 120 Disodium pyrosulfite 284

Diolamine 106 Disodium salt of boric acid 30

Dioxan 120 Disodium tetrabromate 30

Dioxane 120 Disulfiram 124

1,4-Dioxane 120 Disulfoton 124

p-Dioxane 120 Disulfur decafluoride 291

p-Dioxane-2,3-diyl ethyl Di-Syston® 124

 phosphorodithioate 121

4,5-Dithia-1-octene 11

Dioxane phosphate 121 Dithion® 294

2,3-p-Dioxanethiol-S,S-bis(O,O-diethyl Diuron 125

 phosphoro-dithioate) 121

Divanadium pentoxide dust 328

Dioxathion 121 Divanadium pentoxide fume 328

Dioxin 298 Divinyl 35

Dioxine 298 Divinyl benzene 125

1,3-Dioxo-2-pivaloy-lindane 259 DMAC 111

DIPA 110 DMCC 114

Diphenyl 121 DMF 115

Diphenylamine 122 DMH 115

397
Chemical, Synonym, and Trade Name Index (Continued)

(Primary chemical names appear in blue text.) 

Name Page Name Page

DMNA 232 Ektasolve EB® 36

DMP 116 Ektasolve EB® acetate 37

DMDI 207 Elemental hafnium 156

DMDT 195 Elemental nickel 224

DNC 119 Elemental phosphorus 255

DNOC 119 Elemental rhodium 273

DNT 119 Elemental selenium 276

1-Dodecanethiol 126 Elemental silicon 278

Dodecyl mercaptan 126 Emery 126

1-Dodecyl mercaptan 126 ENB 141

n-Dodecyl mercaptan 126 Endosulfan 127

DOP 120 Endosulphan 127

Doped bismuth sesquitelluride 29 Endrin 127

Doped bismuth telluride 29 Enflurane 128

Doped bismuth tritelluride 29 Engravers acid 225

Doped tellurobismuthite 29 Entex 144

Dowanol® EB 36 Epichlorohydrin 128

Dowanol® 50B 122 EPN 129

Dowco® 132 80 1,4-Epoxybutane 302

Dowtherm® 209 269 1,2-Epoxy-3-butoxypropane 42

Dowtherm® A 250 1,2-Epoxy ethane 139

DPA 122 1-Epoxyethyl-3,4-epoxy-cyclohexane 331

DPK 123 1,2-Epoxy-3-isopropoxypropane 183

Dried calcium sulfate 260 1,2-Epoxy-3-phenoxy propane 250

Dry cleaning safety solvent 286 1,2-Epoxy propane 270

Dry ice 53 2,3-Epoxy-1-propanol 153

Dursban® 70 Epoxypropyl alcohol 153

DVB 125 2-Epoxypropyl ether 109

Dyfonate® 147 bis(2,3-Epoxypropyl) ether 109

Dyphonate 147 Erythrene 35

EGBE 36 Essence of mirbane 226

EGBEA 37 Ethanal 2

EGDN 138 Ethanecarboxylic acid 266

EGEE 130 1,2-Ethanediamine 136

EGEEA 131 Ethanedinitrile 82

EGME 202 Ethanedioic acid 238

EGMEA 202 1,2-Ethanediol 137

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398
Chemical, Synonym, and Trade Name Index (Continued)

(Primary chemical names appear in blue text.) 

Name Page Name Page 

1,2-Ethanediol dinitrate 138 Ethyl cyanide 266

Ethane hexachloride 159 1,1'-Ethylene-2,2'-bipyridyllium 

Ethane pentachloride 242 dibromide 123

Ethanethiol 141 Ethylene bromide 136

Ethane trichloride 315 Ethylenecarboxylic acid 8

Ethanoic acid 2 Ethylene chlorhydrin 135

Ethanoic anhydride 3 Ethylene chloride 137

Ethanol 132 Ethylene chlorohydrin 135

Ethanolamine 129 Ethylene cyanide 288

Ethenone 185 Ethylenediamine 136

Ethenyl acetate 329 Ethylenediamine (anhydrous) 136

Ethenyl benzene 287 Ethylene dibromide 136

Ethenyl ethanoate 329 Ethylene dichloride 137

Ethenylmethylbenzene 333 Ethylene dicyanide 288

Ether 140 Ethylene dinitrate 138

Ethine 5 Ethylene glycol 137

Ethion 130 Ethylene glycol dinitrate 138

S-[1,2-bis(ethoxycarbonyl) ethyl]O,O- Ethylene glycol isopropyl ether 180

 dimethyl phosphorodithioate 189

Ethylene glycol monobutyl ether 36

2-Ethoxyethanol 130 Ethylene glycol monobutyl ether 

2-Ethoxyethyl acetate 131 acetate 37

Ethrane® 128 Ethylene glycol monoethyl ether 130

Ethyl acetate 131 Ethylene glycol monoethyl ether 

Ethyl acetone 245 acetate 131

Ethyl acrylate 132 Ethylene glycol monomethyl ether 202

Ethyl acrylate (inhibited) 132 Ethylene glycol monomethyl ether 

Ethyl alcohol 132 acetate 202

Ethyl aldehyde 2 Ethyleneimine 138

Ethylamine 133 Ethylene monochloride 330

Ethylamine (anhydrous) 133 Ethylene nitrate N 

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X 

138

Ethyl amyl ketone 210 Ethylene oxide 139

Ethyl benzene 133 Ethylene thiourea 139

Ethylbenzol 133 1,3-Ethylene-2-thiourea 139

Ethyl bromide 134 N,N-Ethylenethiourea 139

Ethyl butyl ketone 134 Ethylene trichloride 316

Ethyl carbinol 268 Ethylenimine 138

Ethyl chloride 135 Ethyl ester of acetic acid 131

399
Chemical, Synonym, and Trade Name Index (Continued)

(Primary chemical names appear in blue text.) 

Name Page Name Page

Ethyl ester of acrylic acid 132 Ethyl propenoate 132

Ethyl ester of formic acid 140 Ethyl pyrophosphate 296

N-Ethylethanamine 106 Ethyl silicate 142

Ethyl ethanoate 131 Ethyl silicate (condensed) 142

Ethyl ether 140 Ethyl sulfhydrate 141

Ethyl formate 140 Ethyne 5

Ethylformic acid 266 EtOH 132

bis-(2-Ethylhexyl)phthalate 120 ETU 139

5-Ethylidenebicyclo(2.2.1)hept-2-ene 141 Expanded perlite 247

Ethylidene norbornene 141 FAA 5

5-Ethylidene-2-norbornene 141 2-FAA 5

Ethylidene chloride 99 Fenamiphos 143

1,1-Ethylidene dichloride 99 Fenothiazine 248

Ethylimine 138 Fensulfothion 143

Ethyl ketone 108 Fenthion 144

Ethyl mercaptan 141 Fenylfosfin 252

Ethyl methanoate 140 Ferbam 144

Ethyl methyl ketone 36 Fermentation amyl alcohol 175

Ethyl methyl ketone peroxide 209 Ferric chloride 174

Ethyl 3-methyl-4-(methylthio)phenyl- Ferric dimethyl dithiocarbamate 144

 (1-methylethyl)phosphoramidate 143

Ferric nitrate 174

O-Ethyl O-(4-methylthio)phenyl S- Ferric oxide 173

 propylphosphorodithioate 292

Ferric sulfate 174

4-Ethylmorpholine 142 Ferrocene 104

N-Ethylmorpholine 142 Ferrous chloride 174

Ethyl nitrile 4 Ferrous sulfate 174

Ethyl p-nitrophenyl Ferrovanadium 145

 benzenethionophosphonate 129

Ferrovanadium dust 145

O-Ethyl O-(4-nitrophenyl) Fusel oil 175

 phenylphosphonothioate 129

Fiber glas® 145

Ethylolamine 129 Fiberglass 145

Ethyl orthosilicate 142 Fibrous glass dust 145

Ethyl oxide 140 Floridine 283

Ethyl parathion 241 Flue gas 54

Ethyl phthalate 108 2-Fluorenylacetamide 5

O-Ethyl-S-phenyl Fluorine 146

 ethylphosphorothioate 147

Fluorine-19 146

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400
Chemical, Synonym, and Trade Name Index (Continued)

(Primary chemical names appear in blue text.) 

N 

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Name Page Name Page 

Fluorine monoxide 239 Freon® 13B1 318

Fluorocarbon-12 98 Fuel Oil No. 1 184

Fluorocarbon-22 63 Furacarb® 52

Fluorocarbon-115 67 Furadan® 52

Fluorocarbon 1011 63 Fural 150

Fluorocarbon 1301 318 2-Furancarboxaldehyde 150

Fluorodichloromethane 100 2,5-Furanedione 189

Fluoroethene 331 Furfural 150

Fluoroethylene 331 Furfuraldehyde 150

Fluoroformyl fluoride 55 2-Furfuraldehyde 150

Fluorophosgene 55 Furfuryl alcohol 150

Fluorotrichloromethane 146 Furnace black 52

Fluoroxene 147 2-Furylmethanol 150

Fonofos 147 Fused borax 30

Fonophos 147 Gasoline 151

Formal 199 Genetron® 12 98

Formaldehyde 148 Genetron® 21 100

Formaldehyde cyanohydrin 153 Genetron® 22 63

Formaldehyde dimethylacetal 199 Genetron® 113 317

Formaldehyde solution 148 Genetron® 114 102

Formalin (as formaldehyde) 148 Genetron® 115 67

Formamide 149 Germane 151

Formic acid 149 Germanium hydride 151

Formic acid (85-95% in aqueous 149 Germanium tetrahydride 151

 solution) Germanomethane 151

Formonitrile 168 Glacial acetic acid 2

Freon® 10 55 Glacial acrylic acid 8

Freon® 11 146 Glass fibers 145

Freon® 12 98 Glass wool 145

Freon® 21 100 Glutaraldehyde 152

Freon® 22 63 Glutaric dialdehyde 152

Freon® 112 299 Glycerin (anhydrous) 152

Freon® 112a 299 Glycerin (mist) 152

Freon® 113 317 Glycerol 152

Freon® 114 102 Glycerol trichlorohydrin 317

Freon® 115 67 Glyceryl trichlorohydrin 317

Freon® 12B2 109 Glyceryl trinitrate 229

401
Chemical, Synonym, and Trade Name Index (Continued)

(Primary chemical names appear in blue text.) 

Name Page Name Page

Glycide 153 Halon® 122 98

Glycidol 153 Halon® 242 102

Glycidyl phenyl ether 250 Halon® 1011 63

Glycol 137 Halon® 1202 109

Glycol alcohol 137 Halon® 1301 318

Glycol dibromide 136 Halothane 156

Glycol dichloride 137 Halowax® [Tetrachloronaphthalene] 301

Glycol dinitrate 138 Halowax® [Trichloronaphthalene] 316

Glycolic nitrile 153 Halowax® 1013 243

Glycol monoethyl ether acetate 131 Halowax® 1014 160

Glycol monomethyl ether 202 Halowax® 1051 235

Glycol monomethyl ether acetate 202 Hard metal 325

Glycolonitrile 153 Hard wood dust 335

Glyconitrile 153 HCBD 158

Glycyl alcohol 152 HCCPD 159

Grain alcohol 132 HCH 186

Grain dust (oat, wheat, barley) 154 HDI 161

Graphite (natural) 154 Heavy mineral oil mist 237

Graphite (synthetic) 155 Hemellitol 320

Gum camphor 49 Hemihydrate gypsum 260

Gumspirits 325 Hemimellitene 

Gum turpentine 325 [1,2,3-Trimethylbenzene] 320

Guthion® 23 Hemimellitene 

Gypsum 155 [1,2,4-Trimethylbenzene] 320

Gypsum hemihydrate 260 HEOD 105

Gypsum stone 155 Heptachlor 157

Hafnium 156 1,4,5,6,7,8,8-Heptachloro-3a,4,7,7aHafnium metal 156 tetrahydro-4,7-methanoindene 157

Halane 98 Heptane 157

Halocarbon 112 299 n-Heptane 157

Halocarbon 112a 299 normal-Heptane 157

Halocarbon 113 317 1-Heptanethiol 158

Halocarbon 1132A 332 Heptan-4-one 123

Halocarbon 115 67 2-Heptanone 201

Halocarbon 13B1 318 3-Heptanone 134

Halon® 104 55 4-Heptanone 123

Halon® 112 100 Heptyl mercaptan 158

N 

A 

M 

E 

I 

N 

D 

E 

X

402
Chemical, Synonym, and Trade Name Index (Continued)

(Primary chemical names appear in blue text.) 

N 

A 

M 

E 

I 

N 

D 

E 

X 

Name Page Name Page 

n-Heptyl mercaptan 158 Hexahydrocresol 205

Hexachlorobutadiene 158 Hexahydromethylphenol 205

Hexachloro-1,3-butadiene 158 Hexahydrophenol 84

1,3-Hexachlorobutadiene 158 Hexahydrotoluene 204

γ-Hexachlorocyclohexane 186 Hexahydro-1,3,5-trinitro-s-triazine 86

1,2,3,4,5,6-Hexachlorocyclohexane, Hexalin 84

 gamma isomer of 186

Hexamethylene 83

Hexachlorocyclopentadiene 159 Hexamethylene diisocyanate 161

Hexachloro-1,3-cyclopentadiene 159 Hexamethylene-1,6-diisocyanate 161

1,2,3,4,5,5-Hexachloro-1,3- 1,6-Hexamethylene diisocyanate 161

 cyclopentadiene 159

Hexamethyl phosphoramide 162

1,2,3,4,10,10-Hexachloro-6,7-epoxy- Hexamethylphosphoric triamide 162

 1,4,4a,5,6,7,8,8a-octahydro-1,4- 127 Hexamethylphosphorotriamide 162

 endo,endo-5,8-dimethanonaphthalene Hexanaphthene 83

1,2,3,4,10,10-Hexachloro-6,7-epoxy- Hexane 162

 1,4,4a,5,6,7,8,8a-octahydro-1,4- 105 n-Hexane 162

 endo,exo-5,8-dimethanonaphthalene normal-Hexane 162

Hexachloroethane 159 Hexanedinitrile 9

6,7,8,9,10-Hexachloro-1,5,5a,6,9,9a- Hexane isomers (excluding 

 hexachloro-6,9-methano-2,4,3- 127 n-Hexane) 163

 benzo-dioxathiepin-3-oxide 1-Hexanethiol 163

1,2,3,4,10,10-Hexachloro- n-Hexanethiol 163

 1,4,4a,5,8,8a-hexahydro-endo-1,4- 9 2-Hexanone 164

 exo-5,8-dimethanonaphthalene Hexone 164

Hexachloronaphthalene 160 sec-Hexyl acetate 165

Hexadecanethiol-1 160 Hexylene glycol 165

1-Hexadecanethiol 160 Hexyl hydride 162

n-Hexadecanethiol 160 Hexyl mercaptan 163

Hexadecyl mercaptan 160 n-Hexyl mercaptan 163

Hexadrin® 127 n-Hexylthiol 163

Hexafluoroacetone 161 HFA 161

Hexafluoro-2-propanone 161 HF-A 168

1,1,1,3,3,3-Hexafluoro-2-propanone 161 HHDN 9

Hexahydroaniline 85 High solvent naphtha 220

Hexahydro-2H-azepin-2-one 50 High-strength hydrogen peroxide 169

Hexahydrobenzenamine 85 HMDI 161

Hexahydrobenzene 83 HMPA 162

403
Chemical, Synonym, and Trade Name Index (Continued)

(Primary chemical names appear in blue text.) 

Name Page Name Page

HPA 171 Hydrogen sulfide 170

Hydralin 84 Hydromagnesite 188

Hydrated aluminum silicate 183 Hydroperoxide 169

Hydrated calcium sulfate 155 Hydroquinone 170

Hydrated lime 47 Hydroquinone monomethyl ether 196

Hydraulic cement 262 Hydrosulfuric acid 170

Hydrazine 166 Hydrous magnesium silicate 293

Hydrazine (anhydrous) 166 Hydroxyacetonitrile 153

Hydrazine base 166 p-Hydroxyanisole 196

Hydrazinobenzene 251 Hydroxybenzene 248

Hydrite 183 1-Hydroxybutane 39

Hydroacrylic acid 265 2-Hydroxybutane 40

Hydrochloric acid 167 Hydroxycellulose 56

Hydrochloric ether 135 Hydroxycyclohexane 84

Hydrocobalt tetracarbonyl 75 2-Hydroxyethylamine 129

Hydrocyanic acid 168 bis(2-Hydroxyethyl)amine 106

Hydrofluoric acid 168 β-Hydroxyethyl isopropyl ether 180

Hydrogen antimonide 285 α-Hydroxyisobutyronitrile 4

Hydrogen arsenide 21 3-Hydroxy-β-lactone 265

Hydrogenated diphenylbenzenes 166 1-Hydroxy-2-methylbenzene 79

Hydrogenated MDI 207 1-Hydroxy-3-methylbenzene 78

Hydrogenated phenylbiphenyls 166 1-Hydroxy-4-methylbenzene 79

Hydrogenated terphenyls 166 3-Hydroxy-N-methylcrotonamide 

Hydrogenated triphenyls 166 dimethylphosphate 219

Hydrogen bromide 167 Hydroxymethyl ethylene oxide 153

Hydrogen carboxylic acid 149 2-Hydroxymethylfuran 150

Hydrogen chloride 167 2-Hydroxymethyl oxiran 153

Hydrogen cyanamide 81 4-Hydroxy-4-methyl-2-pentanone 90

Hydrogen cyanide 168 2,2-bis(Hydroxymethyl)-1,3- 

Hydrogen dioxide 169 propanediol 244

Hydrogen fluoride 168 2-Hydroxy-2-methyl-propionitrile 4

Hydrogen nitrate 225 4-Hydroxy-3-(3-oxo-1-phenyl butyl)- 

Hydrogen peroxide 169 2H-1-benzopyran-2-one 334

Hydrogen peroxide (aqueous) 169 2-Hydroxyphenol 56

Hydrogen phosphide 254 3-Hydroxyphenol 273

Hydrogen selenide 169 m-Hydroxyphenol 273

Hydrogen sulfate 290

N 

A 

M 

E 

I 

N 

D 

E 

X

404
Chemical, Synonym, and Trade Name Index (Continued)

(Primary chemical names appear in blue text.) 

N 

A 

M 

E 

I 

N 

D 

E 

X 

Name Page Name Page 

3-Hydroxy-1-propanesulphonic acid Iron pentacarbonyl (as Fe) 174

 sultone 264

Iron salts (soluble, as Fe) 174

3-Hydroxy-propionic acid 265 Iron(II) sulfate 174

2-Hydroxypropyl acrylate 171 Iron(III) sulfate 174

β-Hydroxypropyl acrylate 171 Isoacetophorone 179

3-Hydroxypropylene oxide 153 Isoamyl acetate 175

2-Hydroxytoluene 79 Isoamyl alcohol (primary) 175

3-Hydroxytoluene 78 Isoamyl alcohol (secondary) 176

4-Hydroxytoluene 79 Isoamyl methyl ketone 212

2-Hydroxytriethylamine 107 Isobutane 176

Hyponitrous acid anhydride 234 Isobutanol 177

IBA 177 Isobutenyl methyl ketone 194

IGE 183 Isobutyl acetate 177

2-Imidazolidine-2-thione 139 Isobutyl alcohol 177

2,2'-Iminodiethanol 106 Isobutyl carbinol 175

Impure corundum 126 Isobutyl ester of acetic acid 177

Indene 171 Isobutylmethylcarbinol 212

Indium 172 Isobutyl methyl ketone 164

Indium metal 172 Isobutyronitrile 178

Indonaphthene 171 bis(4-Isocyanatocyclohexyl)methane 207

Inert dusts 241 3-Isocyanatomethyl-3,5,5- 

Iodine 172 trimethylcyclohexyl-isocyanate 179

Iodine crystals 172 Isohexane 163

Iodoform 173 Isooctanol 178

Iodomethane 211 Isooctyl alcohol 178

N-IPA 182 Isopentyl acetate 175

IPDI 179 Isopentyl alcohol 175

Iron carbonyl 174 Isopentyl methyl ketone 212

Iron dicyclopentadienyl 104 Isophorone 179

Iron(II) chloride 174 Isophorone diamine diisocyanate 179

Iron(III) chloride 174 Isophorone diisocyanate 179

Iron(III) nitrate 174 Isophthalodinitrile 258

Iron oxide dust and fume (as Fe) 173 Isoprene cyanide 199

Iron(III) oxide [Iron oxide dust and Isopropanol 181

 fume (as Fe)] 173

Isopropenyl benzene 216

Iron(III) oxide [Rouge] 276 Isopropenylnitrile 199

Iron oxide red 276 2-Isopropoxyethanol 180

405
Chemical, Synonym, and Trade Name Index (Continued)

(Primary chemical names appear in blue text.) 

Name Page Name Page

Isopropoxymethyl oxirane 183 n-Lauryl mercaptan 126

o-Isopropoxyphenyl-N- Lead 185

 methylcarbamate 267

Lead metal 185

2-Isopropoxy propane 182 Lead tetraethyl 302

Isopropyl acetate 180 Lead tetramethyl 303

Isopropyl alcohol 181 Lepidolite 217

Isopropylamine 181 Lignite coal dust 73

Isopropylaniline 182 Ligroin 333

N-Isopropylaniline 182 Lime 48

Isopropyl benzene 81 Lime nitrogen 47

Isopropylcarbinol 177 Limestone 186

Isopropyl Cellosolve® 180 Lindane 186

Isopropyl cyanide 178 Liquefied hydrocarbon gas 187

Isopropyl ester of acetic acid 180 Liquefied petroleum gas 187

Isopropyl ether 182 Lithium hydride 187

Isopropyl glycidyl ether 183 Lithium monohydride 187

Isopropyl glycol 180 LPG 187

Isopropylideneacetone 194 L.P.G. 187

Isopropyl methyl ketone 213 Lye [Potassium hydroxide] 263

Isovalerone 110 Lye [Sodium hydroxide] 284

Jasmolin I or II 271 MA 219

Jeffersol EB 36 Mace® 61

Kaolin 183 Magnesia fume 188

Karmex® 125 Magnesite 188

Kepone 184 Magnesium carbonate 188

Kerosene 184 Magnesium(II) carbonate 188

Ketene 185 Magnesium oxide fume 188

Keto-ethylene 185 Malathion 189

Ketone propane 3 Maleic acid anhydride 189

Korax® 66 Maleic anhydride 189

β-Lactone 265 Malonaldehyde 190

Lannate® 195 Malonic aldehyde 190

Lamp black 52 Malonic dinitrile 190

Lanstan® 66 Malonodialdehyde 190

Laughing gas 234 Malononitrile 190

Laurel camphor 49 Manganese-55 191

Lauryl mercaptan 126

N 

A 

M 

E 

I 

N 

D 

E 

X

406
Chemical, Synonym, and Trade Name Index (Continued)

(Primary chemical names appear in blue text.) 

N 

A 

M 

E 

I 

N 

D 

E 

X 

Name Page Name Page 

Manganese compounds and fume 1-Mercaptooctane 237

 (as Mn) 191

3-Mercaptopropane 264

Manganese cyclopentadienyl Mercury compounds [except 

 tricarbonyl (as Mn) 191 (organo) alkyls] (as Hg) 193

Manganese metal 191 Mercury metal 193

Manganese oxide 192 Mercury (organo) alkyl compounds 

Manganese tetroxide (as Mn) 192 (as Hg) 193

Manganese Mesitylene 321

 tricarbonylmethylcyclopentadienyl 206

Mesityl oxide 194

Manganomanganic oxide 192 Metacetone 108

Manmade mineral fibers 217 Metacetonic acid 266

MAPP gas 198 Metallic mercury 193

Marble 192 Metallic tin 308

Margarite 217 Metallum problematum 295

Massive talc 280 Metasystox® 206

MBK 164 Methacrylate monomer 214

MBOCA 207 Methacrylic acid 194

MCB 62 Methacrylic acid (glacial) 194

MCT 191 Methacrylic acid (inhibited) 194

MDA 209 α-Methacrylic acid 194

MDI 208 Methacrylonitrile 199

Mecrylate 204 Methanal 148

MEK 36 Methanamide 149

MEKP 209 Methanecarboxylic acid 2

MEK peroxide 209 Methane tetrabromide 54

Mequinol 196 Methane tetramethylol 244

Mercaptoacetate 306 Methanethiol 214

Mercaptoacetic acid 306 Methane trichloride 65

2-Mercaptoacetic acid 306 Methanoic acid 149

Mercaptobenzene 26 Methanol 200

1-Mercaptobutane 43 Methoflurane 196

1-Mercaptodecane 89 Methomyl 195

1-Mercaptododecane 126 o-Methoxyaniline 18

Mercaptoethane 141 p-Methoxyaniline 19

Mercaptomethane 214 4-Methoxy-1,3-benzene-diamine 91

1-Mercaptononane 235 Methoxycarbonylethylene 198

1-Mercaptooctadecane 236 Methoxychlor 195

407
Chemical, Synonym, and Trade Name Index (Continued)

(Primary chemical names appear in blue text.) 

Name Page Name Page

Methoxy-DDT 195 Methyl (n-amyl) ketone 201

2-Methoxyethanol 202 2-Methylaniline 313

2-Methoxyethyl acetate 202 3-Methylaniline 312

Methoxyfluorane 196 4-Methylaniline 313

Methoxyflurane 196 N-Methyl aniline 219

1-Methoxy-2-hydroxypropane 269 o-Methylaniline 313

2-Methoxy-1-methylethanol 269 Methyl azinphos 23

Methoxymethyl methyl ether 199 2-Methylaziridine 270

4-Methoxyphenol 196 Methyl benzene 311

p-Methoxyphenol 196 3-Methylbenzenamine 312

4-Methoxy-m-phenylene-diamine 91 4-Methylbenzenamine 313

2,2-bis(p-Methoxyphenyl)-1,1,1- Methyl benzol 311

 trichloroethane 195

Methyl bromide 201

1-Methoxy-2-propanol 269 3-Methyl-1-butanol 175

Methyl acetate 197 3-Methyl-2-butanol 176

Methyl acetic acid 266 3-Methyl-1-butanol acetate 175

Methyl acetone 36 3-Methyl-2-butanone 213

Methyl acetylene 197 3-Methyl butan-2-one 213

Methyl acetylene-allene mixture 198 1-Methylbutyl acetate 17

Methyl acetylene-propadiene 1-Methyl-4-tert-butylbenzene 44

 mixture 198

Methyl 1-(butylcarbamoyl)-2- 

Methyl acetylene-propadiene mixture benzimidazolecarbamate 25

 (stabilized) 198

3-Methylbutyl ester of acetic acid 175

β-Methyl acrolein 80 3-Methylbutyl ethanoate 175

Methyl acrylate 198 Methyl butyl ketone 164

2-Methylacrylic acid 194 Methyl n-butyl ketone 164

Methylacrylonitrile 199 Methyl Cellosolve® 202

α-Methylacrylonitrile 199 Methyl Cellosolve® acetate 202

Methylal 199 Methyl chloride 203

Methyl alcohol 200 Methyl chlorobromide 63

Methyl aldehyde 148 Methyl chloroform 203

Methylamine 200 Methylchloromethyl ether 66

Methylamine (anhydrous) 200 Methyl cyanide 4

Methylamine (aqueous) 200 Methyl cyanoacrylate 204

(Methylamino)benzene 219 Methyl-2-cyanoacrylate 204

1-Methyl-2-aminobenzene 313 Methyl α-cyanoacrylate 204

Methyl amyl alcohol 212 Methylcyclohexane 204

N 

A 

M 

E 

I 

N 

D 

E 

X

408
Chemical, Synonym, and Trade Name Index (Continued)

(Primary chemical names appear in blue text.) 

Name Page Name Page 

Methylcyclohexanol 205 1-Methylethyl ester of acetic acid 180

2-Methylcyclohexanone 205 Methyl ethyl ketone 36

o-Methylcyclohexanone 205 Methyl ethyl ketone hydroperoxide 209

2-Methylcyclopentadienyl manganese Methyl ethyl ketone peroxide 209

 tricarbonyl 206

Methylethylmethane 35

Methyl cyclopentadienyl N-(1-Methylethyl)-2-propanamine 110

 manganese tricarbonyl (as Mn) 206

N 

A 

M 

E 

I 

N 

D 

E 

X 

Methyl formate 210

Methyl demeton 206 3-Methyl-5-heptanone 210

4-Methyl-2,6-di-tert-butyl phenol 94 5-Methyl-3-heptanone 210

2-Methyl-3,5-dinitrobenzamide 117 2-Methyl-5-hexanone 212

Methyl dinitrobenzene 119 5-Methyl-2-hexanone 212

4,4'-Methylenebis(2-chloroaniline) 207 Methyl hydrazine 211

4,4'-Methylenebis(o-chloroaniline) 207 Methyl iodide 211

4,4'-Methylenebis(2-chloro- Methylisoamyl acetate 165

 benzenamine) 207

Methyl isoamyl ketone 212

Methylene bis(4-cyclohexyl- Methyl isobutenyl ketone 194

 isocyanate) 207

Methyl isobutyl carbinol 212

Methylene bisphenyl isocyanate 208 Methyl isobutyl ketone 164

Methylene chloride 208 Methyl isocyanate 213

4,4'-Methylenedianiline 209 N-Methyl-2-isopropoxyphenylMethylene dichloride 208 carbamate 267

Methylene dimethyl ether 199 Methyl isopropyl ketone 213

Methylene di-p-phenylene ester of 2-Methyllactonitrile 4

 isocyanic acid 208

Methyl mercaptan 214

Methylene oxide 148 Methyl mercaptophos 206

Methylene bis(4-phenyl isocyanate) 208 Methyl methacrylate 214

Methyl ester of acetic acid 197 N-Methylmethanamine 111

Methyl ester of acrylic acid 198 Methyl methanoate 210

Methyl ester of 2-cyanoacrylic acid 204 Methyl N-((methylamino)carbonyl) 

Methyl ester of formic acid 210 oxy)ethanimidothioate 195

Methyl ester of isocyanic acid 213 S-Methyl-N-(methylcarbamoyloxy) 

Methyl ester of methacrylic acid 214 thioacetimidate 195

Methyl ethanoate 197 Methyl-2-methyl-2-propenoate 214

N-(1-Methylethyl)-benzenamine 182 2-Methylnitrobenzene 233

Methyl ethyl carbinol 40 3-Methylnitrobenzene 232

2-Methylethyleneimine 270 4-Methylnitrobenzene 233

Methyl ethylene oxide 270 o-Methylnitrobenzene 233

409
Chemical, Synonym, and Trade Name Index (Continued)

(Primary chemical names appear in blue text.) 

Name Page Name Page

m-Methylnitrobenzene 232 Methyl silicate 215

p-Methylnitrobenzene 233 Methylstyrene 333

N-Methyl-N-nitroso-methanamine 232 α-Methyl styrene 216

Methyl orthosilicate 215 Methyl sulfate 116

Methyloxirane 270 Methyl sulfhydrate 214

Methyl parathion 215 Methyl systox® 206

2-Methylpentane 163 N-Methyl-N,2,4,6-tetranitroaniline 305

3-Methylpentane 163 Methyl tribromide 34

2-Methyl-2,4-pentanediol 165 1-Methyl-2,4,6-trinitrobenzene 322

4-Methyl-2,4-pentanediol 165 Methyl yellow 112

2-Methylpentane-2,4-diol 165 Metribuzin 216

4-Methyl-2-pentanol 212 Mevinphos 253

2-Methyl-2-pentanol-4-one 90 MIAK 212

4-Methyl 2-pentanone 164 MIBC 212

4-Methyl-3-penten-2-one 194 MIBK 164

2-Methyl phenol 79 MIC 213

3-Methyl phenol 78 Mica (containing less than 

4-Methyl phenol 79 1% quartz) 217

Methylphenylamine 219 Mineral carbon 154

Methylphenylene diamine 311 Mineral spirits 286

1-Methyl-1-phenylethylene 216 Mineral white 155

Methyl phosphite 321 Mineral wool fiber 217

2-Methylpropane 176 MIPK 213

2-Methylpropanenitrile 178 MMH 211

2-Methyl-1-propanol 177 MMT 206

2-Methyl-2-propanol 40 MOCA 207

2-Methylpropenenitrile 199 Molecular bromine 33

Methyl propenoate 198 Molecular chlorine 59

2-Methylpropenoic acid 194 Molecular iodine 172

2-Methylpropionitrile 178 Molybdenum 218

1-Methylpropyl acetate 38 Molybdenum metal 218

2-Methylpropyl acetate 177 Molybdenum (soluble compounds, 

2-Methylpropyl ester of acetic acid 177 as Mo) 218

β-Methylpropyl ethanoate 177 Monoammonium salt of sulfamic acid 16

Methyl propyl ketone 245 Monobromoethane 134

2-(1-Methylpropyl)phenol 43 Monobromoethylene 330

3-(1-Methyl-2-pyrrolidyl)pyridine 224 Monobromomethane 200

N 

A 

M 

E 

I 

N 

D 

E 

X

410
Chemical, Synonym, and Trade Name Index (Continued)

(Primary chemical names appear in blue text.) 

N 

A 

M 

E 

I 

N 

D 

E 

X 

Name Page Name Page 

Monobromotrifluoromethane 318 MXDA 337

Monochloroacetyl chloride 61 Naled 114

Monochlorobenzene 62 Naphtha 220

Monochlorodifluoromethane 63 Naphtha (coal tar) 220

Monochloroethane 135 Naphthalene 221

Monochloroethene 330 Naphthalene diisocyanate 221

Monochloroethylene 330 1,5-Naphthalene diisocyanate 221

Monochloromethane 203 1,5-Naphthalene ester of 

Monochloropentafluoroethane 67 isocyanic acid 221

Monocron 219 Naphthalin 221

Monocrotophos 219 1-Naphthylamine 222

Monoethanolamine 129 2-Naphthylamine 222

Monoethylamine 133 α-Naphthylamine 222

Monoethylene glycol 137 β-Naphthylamine 222

Monofluoroethylene 331 1-Naphthyl N-Methyl-carbamate 51

Monofluorotrichloromethane 146 α-Naphthyl N-methyl-carbamate 51

Monogermane 151 β-Naphthylphenylamine 251

Monohydroxybenzene 248 α-Naphthyl thiocarbamide 20

Monoiodomethane 211 1-Naphthyl thiourea 20

Monoisopropylamine 181 α-Naphthyl thiourea 20

Monomethylamine 200 Natural aluminum oxide 126

Monomethyl aniline 219 Natural calcium carbonate 

Monomethyl ether hydroquinone 196 [Limestone] 186

Monomethylhydrazine 211 Natural calcium carbonate [Marble] 192

Mononitrogen monoxide 225 Natural gasoline 151

Monopentaerythritol 244 Navadel® 121

Monophenylhydrazine 251 NDI 221

Monosilane 279 NDMA 232

Monosodium salt of sulfurous acid 282 Nemacur® 143

Monoxide 54 NG 229

Morpholine 220 NIAX® A99 112

Motor fuel 151 NIAX® Catalyst A1 112

Motor spirits 151 Niax® Catalyst ESN 223

MPK 245 Nibren wax 

Muriatic acid 167 [Tetrachloronaphthalene] 301

Muriatic ether 135 Nibren wax [Trichloronaphthalene] 316

Muscovite 217 Nickel catalyst 224

411
Chemical, Synonym, and Trade Name Index (Continued)

(Primary chemical names appear in blue text.) 

Name Page Name Page

Nickel carbonyl 223 Nitropropane 231

Nickel metal 224 1-Nitropropane 231

Nickel metal and other compounds 2-Nitropropane 231

 (as Ni) 224

iso-Nitropropane 231

Nickel tetracarbonyl 222 N-Nitrosodimethylamine 232

Nicotine 224 N-Nitroso-N,N-dimethylamine 232

Nitramine 305 2-Nitrotoluene 233

Nitrapyrin 69 3-Nitrotoluene 232

Nitric acid 225 4-Nitrotoluene 233

Nitric oxide 225 m-Nitrotoluene 232

4-Nitroaniline 226 meta-Nitrotoluene 232

p-Nitroaniline 226 o-Nitrotoluene 233

4-Nitrobenzenamine 226 ortho-Nitrotoluene 233

Nitrobenzene 226 p-Nitrotoluene 233

Nitrobenzol 226 para-Nitrotoluene 233

4-Nitrobiphenyl 227 Nitrotrichloromethane 67

p-Nitrobiphenyl 227 Nitrous oxide 234

Nitrocarbol 230 Nonane 234

4-Nitrochlorobenzene 227 n-Nonane 234

p-Nitrochlorobenzene 227 1-Nonanethiol 235

Nitrochloroform 67 Nonyl hydride 234

4-Nitrodiphenyl 227 n-Nonyl mercaptan 235

p-Nitrodiphenyl 227 Nonylthiol 235

Nitroetan 228 1-NP 231

Nitroethane 228 2-NP 231

Nitrogen dioxide 228 N-serve® 69

Nitrogen fluoride 229 Nuisance dusts 241

Nitrogen lime 47 Nux vomica 286

Nitrogen monoxide 225 OCBM 62

Nitrogen peroxide 228 Octacarbonyldicobalt 74

Nitrogen trifluoride 229 Octachlorocamphene 58

Nitroglycerine 229 Octachloronaphthalene 235

Nitroglycol 138 1,2,3,4,5,6,7,8-Octachloronaphthalene 235

Nitromethane 230 1,2,4,5,6,7,8,8-Octachloro-3a,4,7,7a2-Nitronaphthalene 230 tetrahydro-4,7-methanoindane 57

β-Nitronaphthalene 230 1-Octadecanethiol 236

p-Nitrophenylamine 226 Octadecyl mercaptan 236

N 

A 

M 

E 

I 

N 

D 

E 

X

412
Chemical, Synonym, and Trade Name Index (Continued)

(Primary chemical names appear in blue text.) 

N 

A 

M 

E 

I 

N 

D 

E 

X 

Name Page Name Page 

Octalene 9 Paraquat dichloride 240

Octane 236 Paraquat (Paraquat dichloride) 240

n-Octane 236 Parathion 241

normal-Octane 236 Parathion-ethyl 241

1-Octanethiol 237 Parathion methyl 215

n-Octyl mercaptan 237 Particulates not otherwise 

Octyl phthalate 120 regulated 241

Octylthiol 237 PBNA 251

1-Octylthiol 237 PCB 

Oil mist (mineral) 237 [Chlorodiphenyl (42% chlorine)] 64

Oil of mirbane 226 PCB 

Oil of vitriol 290 [Chlorodiphenyl (54% chlorine)] 64

Onion oil 11 PCM 246

Orthophosphoric acid 254 PCNB 227

Osmic acid anhydride 238 PCP 243

Osmium oxide 238 m-PDN 258

Osmium tetroxide 238 PE 244

Oxalic acid 238 Pebble lime 48

Oxalic acid (aqueous) 238 Penta 243

Oxalic acid dihydrate 238 Pentaborane 242

Oxalonitrile 82 Pentaboron nonahydride 242

2-Oxetanone 265 Pentacarbonyl iron 174

Oxirane 139 Pentachloroethane 242

2-Oxohexamethyleneimine 50 Pentachloronaphthalene 243

Oxooctyl alcohol 178 1,2,3,4,5-Pentachloronaphthalene 243

Oxybis(chloromethane) 65 Pentachlorophenol 243

2,2'-Oxybis(N,N-dimethyl ethylamine) 112 2,3,4,5,6-Pentachlorophenol 243

Oxygen difluoride 239 Pentachlorophosphorus 256

Oxygen fluoride 239 Pentaerythritol 244

Ozone 239 Pentalin 242

Painters naphtha 333 Pentamethylene 87

PAN 257 Pentanal 327

Paraffin fume 240 Pentane 244

Paraffin oil mist 237 n-Pentane 244

Paraffin scale fume 240 normal-Pentane 244

Paraffin wax fume 240 1,5-Pentanedial 152

Paraquat chloride 240 1-Pentanethiol 245

413
Chemical, Synonym, and Trade Name Index (Continued)

(Primary chemical names appear in blue text.) 

Name Page Name Page

1-Pentanol acetate 17 Phenylamine 18

2-Pentanol acetate 17 2-Phenylaminonaphthalene 251

2-Pentanone 245 Phenylaniline 122

3-Pentanone 108 4-Phenylaniline 14

Penthrane 196 N-Phenylaniline 122

Pentyl ester of acetic acid 17 N-Phenylbenzenamine 122

Pentyl mercaptan 245 Phenyl benzene 121

Perchlorobutadiene 158 2-Phenylbiphenyl 297

Perchlorocyclopentadiene 159 3-Phenylbiphenyl 297

Perchloroethane 159 4-Phenylbiphenyl 298

Perchloroethylene 301 Phenyl chloride 62

Perchloromethyl mercaptan 246 Phenyl chloromethyl ketone 61

Perchloronaphthalene 235 1,4-Phenylene diamine 249

Perchloryl fluoride 246 p-Phenylene diamine 249

Perfluoroacetone 161 m-Phenylenebis(methylamine) 337

Perk 301 Phenyl 2,3-epoxypropyl ether 250

Perlite 247 Phenylethane 133

Peroxide 169 Phenyl ether (vapor) 249

Petrol 151 Phenyl ether-biphenyl mixture 

Petroleum asphalt 22 (vapor) 250

Petroleum bitumen 22 Phenylethylene 287

Petroleum distillates (naphtha) 247 Phenyl glycidyl ether 250

Petroleum ether 333 Phenylhydrazine 251

Petroleum naphtha 247 Phenyl hydride 26

Petroleum solvent 286 Phenyl hydroxide 248

Petroleum spirit 333 N-Phenylisopropylamine 182

PF 252 Phenyl mercaptan 26

PGDN 269 Phenyl methane 311

PGE 250 N-Phenylmethylamine 219

Phenacyl chloride 61 Phenyl-β-naphthylamine 251

Phenamiphos 143 N-Phenyl-β-naphthylamine 251

Phenanthrene 74 4-Phenylnitrobenzene 227

Phenol 248 p-Phenylnitrobenzene 227

Phenol trinitrate 259 Phenyl oxide 249

Phenothiazine 248 Phenyl phosphate 323

Phenoxy benzene 249 Phenylphosphine 252

Phenyl alcohol 248 2-Phenyl propane 81

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414
Chemical, Synonym, and Trade Name Index (Continued)

(Primary chemical names appear in blue text.) 

N 

A 

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Name Page Name Page 

2-Phenyl propylene 216 Pivalyl 259

Phlogopite 217 2-Pivalyl-1,3-inandione 259

Phorate 252 Plaster of Paris 260

Phosdrin® 253 Platinum 261

Phosgene 253 Platinum black 261

Phosphaniline 252 Platinum metal 261

Phosphine 254 Platinum (soluble salts, as Pt) 261

Phosphorated hydrogen 254 Platinum sponge 261

Phosphoric acid 254 Plumbago 154

Phosphoric acid (aqueous) 254 Plumbum 185

Phosphoric chloride 256 PMM 246

Phosphorus chloride [Phosphorus PNA 226

 oxychloride] 255

PNB 227

Phosphorus chloride [Phosphorus PNCB 227

 trichloride] 257

PNOR 240

Phosphorus hydride 254 Polychlorinated biphenyl 

Phosphorus oxytrichloride 255 [Chlorodiphenyl (42% chlorine)] 64

Phosphorus perchloride 256 Polychlorinated biphenyl 

Phosphorus persulfide 256 [Chlorodiphenyl (54% chlorine)] 64

Phosphorus sulfide 256 Polychlorocamphene 58

Phosphorus trihydride 254 Porcelain clay 183

Phosphorus (yellow) 255 Portland cement 262

Phosphorus oxychloride 255 Portland cement silicate 262

Phosphorus pentachloride 256 Potassium cyanide (as CN) 262

Phosphorus pentasulfide 256 Potassium hydrate 263

Phosphorus trichloride 257 Potassium hydroxide 263

Phosphoryl chloride 255 Potassium salt of hydrocyanic acid 262

Phthalic acid anhydride 257 Precipitated amorphous silica 277

Phthalic anhydride 257 Primary amyl acetate 17

m-Phthalodinitrile 258 Primary isoamyl alcohol 175

Picloram 258 Propadiene-methyl acetylene 198

Picric acid 259 Propane 263

Pimelic ketone 84 n-Propane 263

Pindone 259 Propanedial 190

Piperazine dihydrochloride 260 1,3-Propanedial 190

Piperazine hydrochloride 260 Propanenitrile 266

Pival® 259 Propane sultone 264

415
Chemical, Synonym, and Trade Name Index (Continued)

(Primary chemical names appear in blue text.) 

Name Page Name Page

1,3-Propane sultone 264 Propyl alcohol 268

Propane-1-thiol 264 n-Propyl alcohol 268

1-Propanethiol 264 sec-Propyl alcohol 181

1,2,3-Propanetriol 152 Propyl allyl disulfide 11

1,2,3-Propanetriol trinitrate 229 2-Propylamine 181

Propanoic acid 266 sec-Propylamine 181

1-Propanol 268 n-Propyl carbinol 39

2-Propanol 181 Propyl cyanide 44

n-Propanol 268 n-Propyl cyanide 44

2-Propanone 3 Propylene aldehyde 80

Propargyl alcohol 265 Propylene dichloride 268

Propellant 12 98 Propylene glycol dinitrate 269

Propenal 7 Propylene glycol-1,2-dinitrate 269

2-Propenal 7 1,2-Propylene glycol dinitrate 269

Propenamide 7 Propylene glycol methyl ether 269

2-Propenamide 7 Propylene glycol monoacrylate 171

Propenenitrile 8 Propylene glycol monomethyl ether 269

2-Propenenitrile 8 Propylene imine 270

Propene oxide 270 Propyleneimine 270

2-Propenoic acid 8 Propylene imine (inhibited) 270

Propenol 10 Propylene oxide 270

1-Propen-3-ol 10 1,2-Propylene oxide 270

2-Propenol 10 Propylenimine 270

[(2-Propenyloxy)methyl] oxirane 11 n-Propyl ester of acetic acid 267

2-Propenyl propyl disulfide 11 Propyl ester of nitric acid 271

Propine 197 Propyl hydride 263

3-Propiolactone 265 Propyl ketone 123

β-Propiolactone 265 Propyl mercaptan 264

Propione 108 n-Propyl mercaptan 264

Propionic acid 266 n-Propyl nitrate 271

Propionic nitrile 266 Propyne 197

Propionitrile 266 1-Propyne 197

Propiononitrile 266 Propyne-allene mixture 198

Propoxur 267 Propyne-propadiene mixture 198

Propylacetate 267 1-Propyn-3-ol 265

2-Propyl acetate 180 2-Propyn-1-ol 265

n-Propyl acetate 267 2-Propynyl alcohol 265

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416
Chemical, Synonym, and Trade Name Index (Continued)

(Primary chemical names appear in blue text.) 

N 

A 

M 

E 

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D 

E 

X 

Name Page Name Page 

Proteolytic enzymes 287 Refrigerant 13B1 318

Prussic acid 168 Resorcinol 273

Pseudocumene 320 RFNA 225

Pyrene 74 Rhodium metal 273

Pyrethrin I 271 Rhodium (metal fume and insoluble 

Pyrethrin II 271 compounds, as Rh) 273

Pyrethrum 271 Rhodium (soluble compounds, 

Pyrethrum I 271 as Rh) 274

Pyrethrum II 271 Rice starch 285

Pyridine 272 Riebeckite 22

α-Pyridylamine 14 Road asphalt 22

Pyrocatechol 56 Rock candy 288

Pyrocellulose 56 Rockwool 217

Pyroligneous spirit 200 Ronnel 274

Pyrophosphate 304 Roofing asphalt 22

Quartz 278 Roscoelite 217

Quick lime 48 Rosin core solder, pyrolysis 

Quicksilver 193 products (as formaldehyde) 275

Quinol 170 Rosin flux pyrolysis products 275

Quinone 272 Rosin core soldering flux pyrolysis 

p-Quinone 272 products 275

Range oil 184 Ro-Sulfiram® 124

Raw cotton dust 77 Rotenone 275

RDX 86 Rouge 276

Red fuming nitric acid (RFNA) 225 Rubber solvent 247

Red iron oxide 276 Rubbing alcohol 181

Red oxide 276 Ruelene® 80

Reduced MDI 207 Rutile 310

Refined solvent naphtha 333 Saccarose 288

Refrigerant 11 146 Sal ammoniac fume 16

Refrigerant 12 98 Saturated MDI 207

Refrigerant 21 100 Secondary isoamyl alcohol 176

Refrigerant 22 63 Seekay wax 

Refrigerant 112 299 [Tetrachloronaphthalene] 301

Refrigerant 112a 299 Seekay wax [Trichloronaphthalene] 316

Refrigerant 113 317 Selenium 276

Refrigerant 114 102 Selenium alloy 276

417
Chemical, Synonym, and Trade Name Index (Continued)

(Primary chemical names appear in blue text.) 

Name Page Name Page

Selenium dihydride 169 Sodium borate pentahydrate 31

Selenium hexafluoride 277 Sodium cyanide (as CN) 282

Selenium fluoride 277 Sodium fluoride (as F) 283

Selenium hydride 169 Sodium fluoroacetate 283

Sesone 78 Sodium hexafluoroaluminate 281

Sevin® 51 Sodium hydrate 284

Sewer gas 170 Sodium hydrogen sulfite 282

SFA 283 Sodium hydroxide 284

Silane 279 Sodium metabisulfite 284

Silica, amorphous 277 Sodium metabisulphite 284

Silica, crystalline (as respirable Sodium monofluoride 283

 dust) 278

Sodium monofluoroacetate 283

Silica gel 277 Sodium pyrophosphate 304

Silicane 279 Sodium pyrosulfite 284

Silicon 278 Sodium salt of hydrazoic acid 281

Silicon carbide 279 Sodium salt of hydrocyanic acid 282

Silicon dioxide (amorphous) 277 Sodium tetraborate 30

Silicon monocarbide 279 Sodium tetraborate decahydrate 30

Silicon tetrahydride 279 Sodium tetraborate pentahydrate 31

Silver graphite 154 Soft wood dust 335

Silver metal 280 Solvent ether 140

Silver (metal dust and soluble Sorghum gum 285

 compounds, as Ag) 280

Spectracide® 92

Silver nitrate 280 Spirits of turpentine 325

Slag wool 217 Spotting naphtha 286

Slaked lime 47 Stannic oxide 309

Soapstone (containing less than Stannous oxide 309

 1% quartz) 280

Starch 285

Soapstone silicate 280 α-Starch 284

Soda lye 284 Starch gum 285

Sodium acid bisulfite 282 Stearyl mercaptan 236

Sodium aluminum fluoride (as F) 281 Steatite 280

Sodium azide 281 Steatite talc 293

Sodium bisulfite 282 Steam distilled turpentine 325

Sodium bisulphite 282 Stibine 285

Sodium borate (anhydrous) 30 Stibium 19

Sodium borate decahydrate 30 Stoddard solvent 286

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418
Chemical, Synonym, and Trade Name Index (Continued)

(Primary chemical names appear in blue text.) 

N 

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D 

E 

X 

Name Page Name Page 

Stove black 154 Sulprofos 292

Strychnine 286 Symmetrical tetrabromoethane 6

Styrene 287 Symmetrical tetrachloroethane 300

Styrene monomer 287 Symmetrical trimethylbenzene 321

Styrol 287 Synthetic camphor 49

Subtilisin BPN 287 Synthetic vitreous fibers 217

Subtilisin Carlsburg 287 Systox® 90

Subtilisins 287 2,4,5-T 293

Succinic dinitrile 288 Table sugar 288

Succinonitrile 288 Talc (containing no asbestos and 

Sucrose 288 less than 1% quartz) 293

Sugar 288 Tantalum-181 294

Sulfamate 16 Tantalum metal 294

Sulfate wood turpentine 325 Tantalum (metal and oxide dust,

Sulfinyl chloride 307 as Ta) 294

Sulfotepp 294 Tapioca starch 285

Sulfur chloride 290 Tar camphor 221

Sulfur chloride oxide 307 TBE 6

Sulfur decafluoride 291 TBP 314

Sulfur difluoride dioxide 292 TCA 314

Sulfur dioxide 289 TCDBD 298

Sulfuretted hydrogen 170 TCDD 298

Sulfur fluoride 289 2,3,7,8-TCDD 298

Sulfur hexafluoride 289 TCE 316

Sulfuric acid 290 TCHH 87

Sulfuric acid (aqueous) 290 TCP 322

Sulfur monochloride 290 TDA 311

Sulfurous acid anhydride 289 TDI 312

Sulfurous dichloride 307 2,4-TDI 312

Sulfurous oxide 289 TEA 318

Sulfurous oxychloride 307 Tear gas 61

Sulfur oxide 289 TEDP 294

Sulfur pentafluoride 291 TEL 302

Sulfur phosphide 256 Tellurium 295

Sulfur subchloride 290 Tellurium fluoride 295

Sulfur tetrafluoride 291 Tellurium hexafluoride 295

Sulfuryl fluoride 292 Tellurobismuthite 29

419
Chemical, Synonym, and Trade Name Index (Continued)

(Primary chemical names appear in blue text.) 

Name Page Name Page

Telone® 101 Tetraethyl dithionopyrophosphate 294

Temefos 296 Tetraethyl dithiopyrophosphate 294

Temephos 296 Tetraethyl lead (as Pb) 302

TEPP 296 O,O,O',O'-Tetraethyl S,S'-methylene 

Terracur P® 143 di(phosphorodithioate) 130

1,2-Terphenyl 297 Tetraethyl orthosilicate 142

1,3-Terphenyl 297 Tetraethylplumbane 302

1,4-Terphenyl 298 Tetraethyl pyrophosphate 296

m-Terphenyl 297 Tetraethyl silicate 142

meta-Terphenyl 297 Tetraethylthiuram disulfide 124

o-Terphenyl 297 Tetrafluorosulfurane 291

ortho-Terphenyl 297 Tetrahydrobenzene 85

p-Terphenyl 298 1,2,12,12a-Tetrahydro-8,9-dimethoxy-2-

para-Terphenyl 298 (1-methyl-ethenyl)-[1]benzopyrano [3,4- 275

Tetan 304 b]furo[2,3-h][1] benzopyran-6(6aH)-one

TETD 124 Tetrahydrofuran 302

Tetrabromoacetylene 6 3a,4,7,7a-Tetrahydro-4,7- 

Tetrabromoethane 6 methanoindene 104

1,1,2,2-Tetrabromoethane 6 Tetrahydro-1,4-oxazine 220

Tetrabromomethane 54 Tetrahydro-p-oxazine 220

Tetracarbonylhydridocobalt 75 Tetrahydroxymethylolmethane 244

Tetracarbonylhydrocobalt 75 Tetramethoxysilane 215

Tetracarbonyl nickel 222 Tetramethylene cyanide 9

2,3,7,8-Tetrachloro-dibenzo-p-dioxin 298 Tetramethylene oxide 302

1,1,1,2-Tetrachloro-2,2- Tetramethyl ester of silicic acid 215

 difluoroethane 299

Tetramethyl lead (as Pb) 303

1,1,2,2-Tetrachloro-1,2- Tetramethylolmethane 244

 difluoroethane 299

Tetramethylplumbane 303

1,1,1,2-Tetrachloroethane 300 Tetramethyl silicate 215

1,1,2,2-Tetrachloroethane 300 Tetramethyl succinodinitrile 303

Tetrachloroethylene 301 Tetramethyl succinonitrile 303

N-((1,1,2,2-Tetrachloroethyl)thio)-4- O,O,O'O'-Tetramethyl O,O'-thiodi-p- 

 cyclohexene-1,2-dicarboximide 50 phenylene phosphorothioate 296

Tetrachloromethane 55 Tetramethylthiuram disulfide 307

Tetrachloronaphthalene 301 Tetranitromethane 304

2,2,2,6-Tetrachloro-2-picoline 69 Tetrasodium diphosphate 304

Tetraethoxysilane 142 Tetrasodium pyrophosphate 304

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420
Chemical, Synonym, and Trade Name Index (Continued)

(Primary chemical names appear in blue text.) 

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Name Page Name Page 

Tetrasodium pyrophosphate TMA 319

 (anhydrous) 304

TMAN 319

Tetron® 296 TML 303

Tetryl 305 TMSN 303

2,4,6-Tetryl 305 TNM 304

Thallium (soluble compounds, TNT 322

 as Tl) 305

TOCP 322

Thermal black 52 3,3'-Tolidine 310

THF 302 o-Tolidine 310

Thimet 252 Toluene 311

4,4'-Thiobis(6-tert-butyl-m-cresol) 306 Toluenediamine 311

4,4'-Thiobis(3-methyl-6-tert- Toluenediamine isomers 311

 butylphenol) 306

Toluene-2,4-diisocyanate 312

1,1'-Thiobis(2-methyl-4-hydroxy-5- 2,4-Toluene diisocyanate 312

 tert-butylbenzene) 306

3-Toluidine 312

Thiodan® 127 4-Toluidine 313

Thiodemeton 124 m-Toluidine 312

Thiodiphenylamine 248 meta-Toluidine 312

Thioglycolic acid 306 o-Toluidine 313

Thionyl chloride 307 ortho-Toluidine 313

Thionyl dichloride 307 p-Toluidine 313

Thiophenol 26 para-Toluidine 313

Thiosulfurous dichloride 290 Toluol 311

Thiotepp® 294 Tolyethylene 333

Thiram 307 m-Tolylamine 312

Timet 252 o-Tolylamine 313

Tin 308 p-Tolylamine 313

Tin flake 308 o-Tolyl chloride 69

Tin metal 308 Tolylenediamine 311

Tin (organic compounds, as Sn) 308 Tordon® 258

Tin(II) oxide (as Sn) 309 Toxaphene 58

Tin(IV) oxide (as Sn) 309 Toxilic anhydride 189

Tin powder 308 TPP 323

Tin protoxide 309 Tremolite 22

Titanium dioxide 310 Tremolite asbestos 22

Titanium oxide 310 Triatomic oxygen 239

Titanium peroxide 310 Tribromoborane 32

421
Chemical, Synonym, and Trade Name Index (Continued)

(Primary chemical names appear in blue text.) 

Name Page Name Page

Tribromomethane 34 Tricyclohexylhydroxytin 87

Tributyl ester of phosphoric acid 314 Tricyclohexylstannium hydroxide 87

Tributyl phosphate 314 Tricyclohexyltin hydroxide 87

Tri-n-butyl phosphate 314 Tridymite 278

Tricalcium arsenate 46 Triethylamine 318

Tricalcium ortho-arsenate 46 Trifluoramine 229

Trichloroacetic acid 314 Trifluorammonia 229

1,2,4-Trichlorobenzene 315 Trifluoroborane 32

unsym-Trichlorobenzene 315 1,1,1-Trifluoro-2-bromo-2-chloro1,2,4-Trichlorobenzol 315 ethane 156

1,1,1-Trichloro-2,2-bis(p-chloro- 2,2,2-Trifluoro-1-bromo-1-chloro- 

 phenyl)ethane 88 ethane 156

1,1,1-Trichloroethane 203 Trifluorobromomethane 318

1,1,1-Trichloroethane (stabilized) 203 2,2,2-Trifluoroethoxyethene 147

1,1,2-Trichloroethane 315 2,2,2-Trifluoroethyl vinyl ether 147

β-Trichloroethane 315 Trifluoromonobromomethane 318

Trichloroethanoic acid 314 Trihydroxypropane 152

Trichloroethene 316 Triiodomethane 173

Trichloroethylene 316 Trilene 316

Trichlorofluoromethane 146 Trimanganese tetraoxide 192

Trichlorohydrin 317 Trimanganese tetroxide 192

Trichloromethane 65 Trimellic acid anhydride 319

Trichloromethane sulfenyl chloride 246 Trimellitic anhydride 319

1,1,1-Trichloro-2,2-bis-(p-methoxy- Trimethoxyphosphine 321

 phenyl)ethane 195

Trimethylamine 319

N-Trichloromethylmercapto-4- 1,2,3-Trimethylbenzene 320

 cyclohexene-1,2-dicarboximide 51

1,2,4-Trimethylbenzene 320

Trichloromethyl sulfur chloride 246 1,3,5-Trimethylbenzene 321

Trichloromonofluoromethane 146 sym-Trimethylbenzene 321

Trichloronaphthalene 316 Trimethyl carbinol 40

Trichloronitromethane 67 3,5,5-Trimethyl-2-cyclohexenone 179

2,4,5-Trichlorophenoxyacetic acid 293 3,5,5-Trimethyl-2-cyclo-hexen-1-one 179

1,2,3-Trichloropropane 317 Trimethylenetrinitramine 86

1,1,2-Trichloro-1,2,2-trifluoroethane 317 Trimethyl ester of phosphorous acid 321

Tri-o-cresyl ester of phosphoric acid 322 Trimethyl phosphite 321

Tri-o-cresyl phosphate 322 Trinitroglycerine 229

Tricyclohexylhydroxystannane 87 2,4,6-Trinitrophenol 259

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422
Chemical, Synonym, and Trade Name Index (Continued)

(Primary chemical names appear in blue text.) 

N 

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Name Page Name Page 

2,4,6-Trinitrophenyl-N-methylnitramine 305 Valeraldehyde 327

Trinitrotoluene 322 n-Valeraldehyde 327

2,4,6-Trinitrotoluene 322 Valeric aldehyde 327

sym-Trinitrotoluene 322 Valerone 110

Trinitrotoluol 322 Vanadic anhydride dust 328

1,3,5-Trinitro-1,3,5-triazacyclohexane 86 Vanadic anhydride fume 328

Triorthocresyl phosphate 322 Vanadium dust 328

Trioxychlorofluoride 246 Vanadium fume 328

m-Triphenyl 297 Vanadium oxide dust 328

o-Triphenyl 297 Vanadium oxide fume 328

p-Triphenyl 298 Vanadium pentaoxide dust 328

Triphenylamine 323 Vanadium pentaoxide fume 328

Triphenyl ester of phosphoric acid 323 Varnish makers' & painters' naptha 333

Triphenyl phosphate 323 VC 330

Tripoli 278 VCM 330

Tris(dimethylamino)phosphine oxide 162 VCN 8

TSPP 304 VDC 332

TTE 317 VDF 332

Tungsten 324 Vegetable mist 329

Tungsten (soluble compounds, Vegetable oil mist 329

 as W) 324

Vikane® 292

Tungsten carbide (cemented) 325 Vinyl acetate 329

Tungsten metal 324 Vinyl acetate monomer 329

Turpentine 325 Vinyl benzene 287

Turps 325 Vinyl bromide 330

UDMH 115 Vinyl carbinol 10

1-Undecanethiol 326 Vinyl chloride 330

Undecyl mercaptan 326 Vinyl chloride monomer (VCM) 330

Unslaked lime 48 Vinyl cyanide 8

Unsymmetrical dimethylhydrazine 115 4-Vinylcyclohexene diepoxide 331

Uranium I 326 Vinyl cyclohexene dioxide 331

Uranium (insoluble compounds, 4-Vinyl-1-cyclohexene dioxide 331

 as U) 326

Vinyl ethanoate 329

Uranium metal 326 Vinylethylene 35

Uranium (soluble compounds, as U) 327 Vinyl fluoride 331

VAC 329 Vinyl fluoride monomer 331

Valeral 327 Vinylidene chloride 332

423
Chemical, Synonym, and Trade Name Index (Continued)

(Primary chemical names appear in blue text.) 

Name Page Name Page

Vinylidene chloride monomer 332 meta-Xylene 335

Vinylidene dichloride 332 o-Xylene 336

Vinylidene difluoride 332 ortho-Xylene 336

Vinylidene fluoride 332 p-Xylene 336

Vinylstyrene 125 para-Xylene 336

Vinyl toluene 333 m-Xylene-α,α'-diamine 337

Vinyl trichloride 315 Xylidine 337

VM & P Naphtha 333 m-Xylol 335

WARF 334 o-Xylol 336

Warfarin 334 p-Xylol 336

Welding fumes 334 m-Xylylenediamine 337

Western red cedar dust 335 Yttrium 338

WFNA 225 Yttrium metal 338

White fuming nitric acid (WFNA) 225 Zimmwaldite 217

White mineral oil mist 236 Zinc chloride fume 338

White phosphoric acid 254 Zinc chromate 70

White phosphorus 255 Zinc dichloride fume 338

White tar 221 Zinc distearate 339

White tin oxide 309 Zinc oxide 339

Wolfram 324 Zinc peroxide 339

Wood alcohol 200 Zinc salt of stearic acid 339

Wood dust 335 Zinc stearate 339

Wood naphtha 200 Zoalene 117

Wood spirit 200 Zirconium 340

Wood turpentine 325 Zirconium compounds (as Zr) 340

m-Xylene 335 Zirconium metal 340

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424