# 2006 Inventory Update Reporting: Data Summary

Introduction

— Find out more about the TSCA Chemical Substance Inventory, the Inventory Update Reporting program, and the release of the 2006 IUR

database. Overview

— Read about why EPA produced this report for the first time and the summary of what was collected in 2006.

Use of the IUR Data

— Learn about EPA’s current use of the 2006 IUR data and the factors and assumptions to consider when using the data.

Data Analysis and Key Findings

— This section provides a summary of specific information reported under the 2006 IUR. It presents key findings from the data, including detailed analyses with supporting tables and graphs.

Next Steps

— Find out about EPA’s plans for future IUR data releases and for

the 2011 IUR collection.

EPA 740S08001 December 2008 Office of Pollution Prevention and Toxics 

### The U.S. Environmental Protection Agency (EPA) is presenting for the first time a report on the 2006 collection of chemical data under the Toxic Substances Control Act (TSCA) In

ventory Update Reporting (IUR) rule. The IUR is a periodic regulatory collection of specific information on chemical substances listed on the TSCA Inventory. This document provides a summary of the chemical manufacturing, processing, and use information, as reported for calendar year 2005.1 2006 Inventory Update Reporting: Data Summary 

# T he 2006 Inventory Update Reporting: Data Summary is an overview of the chemical manufacturing, processing, and use information collected in 2006 under the Inven

tory Update Reporting (IUR) rule. Manufacturers and importers 1 

### provided informa

tion on the chemical substances they manufactured in or imported into the United States in amounts of at least 25,000 pounds at a site during the 2005 calendar year.

This report provides an overview of the 2006 IUR data and includes summary information and supporting tables and figures developed from the

data 2 

### . A non-confidential collection of the 2006 IUR data is available on the IUR Web site ( www.epa. gov/iur ). The Web site also includes non-confiden

tial production volume and company identity data collected during previous reporting cycles.

The 2006 collection represents the first time that the U.S. Environmental Protection Agency (EPA) collected information on the processing and use of organic chemical substances. This reporting was in addition to the production volume information col

lected in previous reporting cycles. This collection

also marks the first time that manufacturers were required to report manufacturing information on inorganic, as well as organic, chemical substances. Exhibit 1 presents an overview of the 2006 IUR col

lection.

In 2006, a total of 3,827 sites 3 

### , representing 1,541 companies, reported information on 6,200 chemi

cals. More than 95 percent of the total production volume reported is manufactured in the United States. For organic chemicals manufactured in quantities of 300,000 pounds or greater at a given site, submitters also reported downstream uses. These submitters reported nearly 1 trillion pounds of organic chemicals. The 2006 IUR data contained industrial processing and use information that accounted for 72 percent and commercial and

consumer use information that accounted for 22 percent of the nearly 1 trillion pounds. 

# Overview

Examples of Reported Uses:

•	 Formulating chemicals into inks •	 Incorporating chemicals into children’s toys •	 Using chemicals as intermediates

1 The IUR rule follows the Toxic Substances Control Act (TSCA) definition of “manufacture” which means to manufacture, produce, or import for commercial purposes. Throughout the rest of this report, the term “manufacture” will include import (and “manufacture r” will include importer). The term “domestically manufactured” will exclude imported volumes.

2 This summary is based on version 1 of the 2006 IUR database. This version excludes approximately five percent of the number of chemicals submitted due to significant problems with the chemical identifications.

3 For the purposes of IUR, EPA defines a “site” as the physical location where a chemical substance is manufactured, processed, or used or the physical location (including a business office) that controls the chemical’s import.2 2006 Inventory Update Reporting: Data Summary Overview



### Exhibit 1. 2006 IUR Data Overview

IUR Submissions* 4,107

Companies Reporting 1,541

Sites Reporting* 3,827

Unique Chemicals Reported 6,200

Chemicals Reported as Domestically Manufactured** 4,834

Chemicals Reported as Imported** 3,162

Total Reported Domestically Manufactured Production Volume (billion lb) 26,086

Total Reported Imported Production Volume (billion lb) 833

Total Reported Production Volume (billion lb) 26,919

Organic Chemicals Reported 5,546

Chemicals with Reported Process/Use Information 2,993

% Production Volume with Reported Process/Use
Information*** 72

Chemicals with Reported Commercial/Consumer Use Information 2,118

% Production Volume with Reported Commercial/Consumer
Use Information*** 22

Inorganic Chemicals Reported 654

* Under IUR, companies submit a Form U reporting all subject chemicals manufactured on a site-specific basis. Some companies submitted multiple Form U’s for each site; therefore, the number of submissions is greater than
the number of sites.

** The counts for “Chemicals Reported as Domestically Manufactured” and “Chemicals Reported as Imported” also
include any chemicals that report both domestic manufacturing and importing activities; therefore, adding these

rows results in more than 6,200 chemicals.

*** Partially exempt petroleum process streams accounted for seven percent of the reported organic chemicals.
Because reporting of processing and use information was not required for partially exempt chemicals, they were excluded from these calculations. Note that although inorganic chemicals were also partially exempt, EPA did
receive some processing and use information for those chemicals; the associated inorganic production volume was not included in these calculations, which pertain to organic chemicals only.3 2006 Inventory Update Reporting: Data Summary 

# Introduction

Why is IUR Information Collected?
The Toxic Substances Control Act (TSCA) Section 8(a) authorizes EPA to collect certain information on chemical substances manufactured or pro

cessed in the United States. In 1977, EPA promul

gated a rule under TSCA Section 8(a) to compile an inventory of all chemical substances in commerce in the United States. This inventory is called the TSCA Chemical Substance Inventory, or the TSCA Inventory; it lists chemical substances that have been domestically manufactured and imported for commercial purposes into the United States. Through the IUR, the Agency obtains a periodic
collection of information on the more than 83,000 chemical substances currently listed on the TSCA Inventory.

Chemical substances are added to the TSCA Inventory after a manufacturer has submitted a Premanufacture Notification (PMN), satisfied the requirements of TSCA Section 5, and filed a Notice of Commencement (NOC). 4 

### Chemical substances not on the TSCA Inventory can only be manufac

tured, processed, or used for a commercial purpose

in the United States if the chemical substances are exempt or otherwise excluded from the PMN requirements. The TSCA Chemical Substance Inventory includes only those chemicals that meet the TSCA definition of a “chemical substance”; chemicals used solely for certain applications, such as cosmetics, drugs, or pesticides, are excluded from the definition
of a chemical substance. Dual-use chemicals, or

chemicals that have both a TSCA and a non-TSCA use, may be included on the TSCA Inventory for

their TSCA use. For more information on the TSCA Inventory, visit EPA’s New Chemicals Program Web site ( www.epa.gov/oppt/newchems ).



### What is the History of IUR?
EPA implemented the IUR program following the promulgation of the first IUR regulation in 1986. The first IUR information collection required 

### Definition: Chemical Substance

TSCA defines the term **chemical substance** as
any organic or inorganic substance of a particular
molecular identity, including: (i) any combination of such substances occurring in whole or in part

as a result of a chemical reaction or occurring
in nature, and (ii) any element or uncombined
radical.

4 For additional information on the Premanufacture Notification process and other aspects of the New Chemicals Program, please vis it www.epa.gov/oppt/newchems

. 

# I nventory Update Reporting (IUR) is a periodic collection of information on the chemical

substances currently in commerce. Manufacturers are required to submit information on the chemical substances that they domestically manufactured or imported into the United States and that meet certain reporting requirements, which are described in this chapter. What is Inventory Update Reporting?4 2006 Inventory Update Reporting: Data Summary Introduction



### manufacturers to report basic manufacturing data, including the specific chemical identity, produc

tion volume, and site-limited status for organic chemical substances listed on the TSCA Inventory and produced in the amount of 10,000 pounds or more, at a single site, during 1985. Collected every four years, EPA uses this information to support activities associated with implementing TSCA.

EPA amended the IUR regulation in 2003 to tailor the chemical substance reporting requirements to more closely match current information needs, which included obtaining new and updated infor

mation and improving the utility of the informa

tion reported. Under the amended IUR require

ments, manufacturers producing 25,000 pounds or more of a reportable chemical substance, at a site, must report its specific chemical identity and related manufacturing information. If a manu

facturer produces 300,000 pounds or more of the chemical substance at a site, they must also report processing and use information. Exhibit 2 contains a brief list of the new exposure-related reporting

elements.

While the early IUR collections were limited to the collection of information on organic chemical sub

stances, the 2003 amendments expanded the collec

tion to include information on inorganic chemical substances. The changes to the reporting threshold were done, in part, in recognition of the increased burden associated with these new reporting require

ments. EPA also reduced the reporting frequency from every four years to every five years, and limited the reporting of processing and use information to data covering U.S. uses only.



### What Information Did EPA Collect for 2006 IUR Reporting?

The 2006 information collection was the first re

porting cycle to incorporate the amendments into the reporting requirements. Information covering calendar year 2005 was collected during the 2006 submission period, from August 25, 2006 to March
23, 2007, on 6,200 chemical substances.

EPA collected information from sites that manu

facture TSCA Inventory-listed chemicals in quan

tities of 25,000 pounds or more at a given site. Each site submitted an IUR report for all subject chemicals manufactured by that site during 2005. 

### Definition: Site-Limited

A **site-limited** chemical is manufactured and
consumed at a given site and is not distributed
in its pure or impure form or in any mixture

or article outside the site for commercial

purposes. Note that imported chemical
substances cannot be site-limited. 

### Exhibit 2. New Exposure-Related Data
Elements in the 2006 IUR

• **Physical form(s)** of the reportable chemical as it
leaves each site and the associated percentage of production volume.

• **Maximum concentration**

, measured by percentage of weight, of each reportable chemical
at the time it leaves each site and for each reported
commercial and consumer use.

• **Total number of workers** reasonably likely to be exposed to the reportable chemical at the site of domestic manufacture or import and for each
industrial processing or use activity.

• **Number of industrial sites** that process or use the
chemical.

• **Industrial processing or use operation(s)** at sites that receives the reportable chemical from the
submitter site directly or indirectly.

• **Commercial and consumer product category or categories**  that best describe the commercial
and consumer products in which the reportable
chemical is used.

• **Percentage total production volume** of the reportable chemical that is associated with each

process or use.

• **Indication of whether reportable chemical substances are present in products intended for**  **use by children** up to the age of 14.5 2006 Inventory Update Reporting: Data Summary Introduction



### A site’s IUR submission consists of manufacturing, processing, and use information for every chemical manufactured at the site that meets the report

ing requirements. A submission typically contains reports for multiple chemicals.

EPA required all reporting sites to submit the fol

lowing manufacturing information for each report

able chemical substance:

•	 Parent company and site identification
•	 Specific chemical name

•	 Chemical Abstracts Service (CAS) Registry Num

ber (or other identifying number)
•	 Domestically manufactured production volume
•	 Imported production volume

•	 Site-limited status

•	 Maximum concentration

•	 Number of workers reasonably likely to be exposed during the manufacture of the chemical

substance
•	 Physical form and the percentage of the chemi

cal substance in each physical form

In addition to the above information, if the site manufactured organic chemical substances in volumes that exceeded the 300,000 pound thresh

old, then they were required to submit information on industrial processing and use and on com

mercial and consumer uses for those chemical

substances. Manufacturers submitted information

on uses at their own site and at other locations that process and use these chemical substances.

Industrial processing and use information includes the following:

•	 Unique combinations of:

– Type of process or use

– Industrial sector of use

– Function of the chemical •	 For each unique combination:

– Number of sites associated with each indus

trial processing or use activity

– Number of workers reasonably likely to be ex

posed to the chemical substance during each processing or use activity

– Percent of the total production volume associ

ated with each processing or use activity

Commercial and consumer use information in

cludes the following:

•	 Category of products in which the chemical was used

•	 Maximum concentration of the chemical in each product category

•	 Percent of the total production volume associ

ated with each product category

•	 Use of the chemical in products intended for children up to 14 years of age



### EPA Encouraged Electronic Reporting
EPA made electronic reporting software avail

able to all submitters for the 2006 reporting cycle. Downloadable from EPA’s Web site, the software enabled submitters to develop a validated, correctly formatted, and encrypted data file containing their IUR submission. The data file could be printed and submitted to EPA, saved and submitted on magnetic media, or submitted over the Internet through the Agency’s Central Data Exchange (CDX) 5 

### . Full use of the reporting software, including the validation process, improved the accuracy of the submitted IUR Form U data. Submission of the encrypted file enabled EPA to directly load data into the database, thereby further improving the accuracy of the data by avoiding scanning-related errors.

EPA anticipated that electronic IUR submissions

would result in a fast turnaround time between the submission of the data to the Agency and the

5 Central Data Exchange (CDX) serves as EPA’s point of exchange on the Environmental Information Exchange Network. To learn more
about CDX, visit http://cdx.epa.gov/epa_home.asp6 2006 Inventory Update Reporting: Data Summary Introduction



### availability of the data for use, and more than half of all reports were, in fact, submitted this way. EPA worked diligently to ensure that the database was accurate and would provide the public with the most useful information. However, availability of the data for public use has not happened quickly as a result of many issues stemming primarily from

non-electronic submissions.

Preparing the 2006 IUR database for this data sum

mary has taken longer than expected. The delay

resulted from a combination of events associated

with the time and resources needed to review and correct submitter- and scanning-related errors from the non-electronic reports. EPA detected sig

nificant errors on a substantial number of report

ing forms. Oftentimes, the submitted data did not conform to the reporting requirements of the IUR rule. The Agency also faced difficulties resolving issues pertaining to submissions with incorrect

chemical identification information. Based on this experience, and as discussed in Next Steps , EPA is considering steps to improve company reporting and EPA processing of the IUR information submit

ted in the next (2011) reporting cycle.



### What is the 2006 IUR Public Database?
The 2006 IUR public database is a collection of
non-confidential information on 6,200 chemicals domestically manufactured in or imported into the United States and includes processing and use
information on more than 3,000 of those chemi

cal substances. Released in conjunction with this report for use by the general public, EPA developed the public database from an internal database comprised of the 2006 IUR submitted informa

tion. In order to provide the public with the most comprehensive data, EPA has provided much of the information as aggregated, national numbers in ranges. This allows the public to view information

based on both the confidential and non-confiden

tial data.

Manufacturing, processing, and use data, com

piled into a searchable database format, enables EPA and others to more readily screen chemical substances for potential exposure and risk. The IUR provides updated data for a set of chemicals on the TSCA Inventory and is used in many of EPA’s Office of Pollution Prevention and Toxic’s (OPPT’s) programs. The addition of the manufacturing, processing, and use data elements greatly enhances the utility of the IUR data for the Agency and the public alike.

How Can I Access the IUR Public Data?
The 2006 IUR public data are available on the IUR Web site ( www.epa.gov/iur ). You can download the full public database or you can search the database by chemical name, CAS Registry Number, or com

pany name. The resulting searches provide chemi

cal-specific, nationally aggregated information on manufacturing, processing, and use of the chemical substance and company-specific non-confidential

site and chemical information.

The IUR Web site also includes public information from previous IUR collections. National production volumes reported for 1986 through 2002 submis

sion periods can be searched by chemical name or CAS Registry Number. In addition, information

from the 1998 and 2002 collections can be searched by chemical name, CAS Registry Number, or com

pany name.7 2006 Inventory Update Reporting: Data Summary 

# Use of the IUR Data

EPA’s Current Use of the 2006 IUR Data
EPA’s expansion of the IUR data collected in the 2006 reporting cycle provides users with additional

information on chemical substances on the TSCA Inventory. The additional manufacturing data and industrial processing and use data provide EPA with information on potential worker exposures
to chemical substances as well as, in some cases, potential environmental releases during manu

facturing, processing, and use. Commercial and consumer use data reported in the IUR provide an indication of potential exposures during use in a commercial setting and by consumers. Other EPA offices and government agencies that have used the basic manufacturing information from previous collections are expected to similarly use these new IUR data to identify potential use scenarios that may lead to exposure.

Data generated by the IUR are used in a wide variety of programs fundamental to fulfilling EPA’s TSCA responsibilities. Historically, EPA has used the IUR data to support several programs that utilize information on the production volumes of chemical substances, such as EPA’s High Produc

tion Volume (HPV) Challenge Program 6 

### and the development of rules requiring testing of chemical substances. The Agency’s primary use of the data from the expanded reporting in the 2006 IUR cycle is to prioritize TSCA chemical substances for more detailed information gathering, risk screening and risk management to protect human health and the environment. Uses of the 2006 data by EPA are discussed in the following sections.

The Security and Prosperity Partnership of North America (SPP)
The Security and Prosperity Partnership of North America (SPP) program is a collaboration among
the United States, Canada, and Mexico, which

includes efforts to ensure the safe manufacture

and use of industrial chemical substances in North America. Each country shares scientific informa

tion, technical understanding, best practices, and risk management approaches. In addition, the countries coordinate research on new approaches to chemical testing and assessment. This partner

ship, launched in August 2007, commits the three countries to accelerating and improving the effec

tiveness of actions to safeguard human health and the environment, providing cost-effective solutions for risk management for businesses and govern

ments, and strengthening regulatory authority. 

# T he IUR represents the most comprehensive source of basic screening-level, exposurerelated information available, and as such, the IUR data are of value in supporting risk screening, priority setting, and management activities. The availability of IUR data will be helpful as government, industry, and the public work together to identify, develop, and implement programs to minimize the potential environmental and human

health risks from chemical substances of concern.

6 EPA, Environmental Defense, American Petroleum Institute, and American Chemistry Council joined forces to launch the voluntary HPV Challenge Program in 1998 to collect basic hazard data for HPV chemicals. HPV chemicals are classified as those chemicals manufactured in or imported into the United States in national quantities of 1 million pounds or more per year. Additional info rma

tion is available on the HPV Challenge Web site ( www.epa.gov/chemrtk ).8 2006 Inventory Update Reporting: Data Summary Use of the IUR Data



### The Chemical Assessment and Management Program (ChAMP)

EPA initiated the Chemical Assessment and Management Program (ChAMP) to fulfill commit

ments made under the SPP. Under ChAMP, EPA is using IUR data, in conjunction with other data, to prioritize chemical substances for future work. The prioritization is based on information concerning a chemical substance’s potential hazards and on the potential exposure of workers, consumers (espe

cially children), the environment, and the general population.

In 2008, as part of the SPP commitments, EPA began posting screening-level risk-based prioritiza

tion (RBP) documents on EPA’s Web site. The RBPs summarize basic hazard and exposure informa

tion on EPA’s HPV Challenge Program chemical substances. RBP documents also identify potential
risks, note scientific issues and uncertainties, and indicate the initial priority assigned by the Agency for potential future appropriate action. The 2006 IUR data are essential to the development of these RBP documents, providing the screening-level exposure-related information necessary for the ini

tial priority determination. In addition, EPA began developing initial evaluations of Moderate Produc

tion Volume (MPV) chemicals. The evaluation of

the first set of these chemical substances consists of development of a hazard characterization and hazard-based prioritization.

Out of the 6,716 chemical substances currently on the ChAMP list, 6,138 reported information for this past reporting cycle. Of these ChAMP chemicals, submitters provided information on 2,889 HPV
chemicals and 3,249 MPV chemicals under the

2006 IUR.

EPA also recently announced its intention to implement two additional activities: the Inventory Reset Program and the Inorganics HPV Challenge Program. The Reset Program, discussed further in Next Steps , will reset the TSCA Inventory to more accurately reflect the chemicals currently in com

merce. The Inorganics HPV Challenge Program is a data collection and characterization program for inorganic chemicals that will parallel efforts with the HPV Challenge Program, which currently only includes organic chemicals.

Additional details can be found on the ChAMP Web site ( www.epa.gov/champ ).

Other EPA Uses
Examples of other ways EPA uses IUR information

include:

•	 Providing a preliminary characterization of the potential exposure to a chemical substance from information collected on manufacture, process

ing, and use of chemical substances.

•	 Supporting regulatory initiatives to require testing and/or submission of information about

selected chemical substances.
•	 Identifying manufacturers of chemical substanc

es in the event of a need for rapid risk manage

ment response to a concern about a chemical

substance.

•	 Assisting in the design and implementation of cooperative programs with the chemical indus

try and the public such as the Voluntary Chil

dren’s Chemical Evaluation Program (VCCEP) and the Design for the Environment Program (DfE).
The Agency anticipates that, as was true even for the basic production data reported under previous collections, new uses of current IUR data by EPA and by others will continue to emerge.9 2006 Inventory Update Reporting: Data Summary Use of the IUR Data



### The Public’s Use of the IUR Data
The 2006 IUR public database provides the public, government officials, non-governmental organiza

tions, and industry with access to non-confidential information on the manufacture, processing, and

use of chemical substances in commerce on a regional and national level. The public database can be searched by chemical identity to retrieve chemical-specific manufacturing, processing, and use information or by company name to retrieve the list of chemicals reported by the sites associ

ated with the subject company.

What Should I Consider When Using the IUR
Public Database?
IUR reporting is triggered by the production
volume of the chemical substance manufactured, rather than the actual hazards or potential expo

sures associated with a chemical substance. You should consider this aspect of the data when using the public IUR database. In addition, while the IUR provides comprehensive reporting from all subject companies, the required data are limited and were intended to be used only for screening-level pur

poses. For this reason, the use of the IUR data alone is not sufficient to determine potential exposures or to calculate potential risks to human health and the environment, even at the screening level. IUR data, in conjunction with other information, such as the toxicity of the chemical, potential releases, and site-specific conditions, can be used as a start

ing point in prioritizing and screening chemicals for potential risks to humans and the environment.

The public should also consider several character

istics of IUR information when using the data, as

follows:

• Confidential Business Information Claims— IUR data can be designated as confidential busi

ness information (CBI) by the submitter. EPA has protected confidential information when ag

gregating IUR data for use in public documents, including in this report. Public versions of the IUR database present data that were either not claimed as CBI or that have been aggregated to protect confidential information.

Exhibit 3 provides statistics on the percentage of

IUR data elements that were claimed confidential.

When using data in this report or on the IUR
Web site, users do not have access to the com

plete IUR data set and should draw conclusions

from the available data with care. 

### Definition: Confidential Business Information

**Confidential Business Information (CBI)**

, in the IUR context, is commercial information
obtained from the information owner, or
person, and claimed as confidential, that
is treated as confidential by that person, has not been previously disclosed, is not available from other sources and is not required by law to be disclosed. Additionally
the person asserting the CBI claim must believe that the release of the information
claimed as CBI would cause substantial injury to the person’s competitive position.
For further information see the IUR Web site ( www.epa.gov/iur ).10 2006 Inventory Update Reporting: Data Summary Use of the IUR Data



### Exhibit 3. CBI Claims for Specific IUR Data Elements

Data Element Percentage of Time
Data Element Claimed Confidential

**Manufacturing Information**

Domestic Manufacture Production Volume 32%

Import Production Volume 20%

Site-Limited Status 13%

Physical Form* 13%

**Processing and Use Information**

Industrial Processing and Use Information (overall) ** 28%

Industrial Processing and Use Information (3-Code Combination) *** 49%

Process Use Code 26%

5-digit NAICS Code 29%

Industrial Function Category 27%

Commercial and Consumer Use Information 26%

* EPA’s calculation of the extent of CBI claims for physical form includes only the physical forms selected by the
submitter as applying to the reported chemical. This calculation excludes those CBI claims for a non-selected physical form.

** EPA bases the overall extent of CBI on the number of CBI claims reported for all industrial processing and use information provided.

*** EPA determines the percent of industrial processing and use information that were claimed as CBI based on the unique combinations of codes for the type of process or use, the industry sector, and the industrial function of
the chemical. EPA bases the extent of CBI on the number of CBI claims reported for every unique combination.11 2006 Inventory Update Reporting: Data Summary Use of the IUR Data



### • Reporting Thresholds and Exemptions – An understanding of IUR reporting thresholds, the
TSCA definition of a chemical substance, and the various IUR exemptions are important when using and interpreting the IUR data.
Reporting Threshold: The 2006 IUR includes infor

mation about chemical substances listed on the TSCA Inventory and manufactured in quantities of 25,000 pounds or more at a single site during calendar year 2005. Manufacturers of chemical substances in lesser volumes are not required to

submit information for those chemicals. Note that for prior reporting cycles (2002 and earlier), the reporting threshold was 10,000 pounds at a site. Aggregated production volume informa

tion may not reflect the total volume if there are

a substantial number of sites that manufacture the chemicals in quantities less than 25,000 pounds per year. Comparison of production for a particular chemical over time might be affected by the change in the reporting threshold.

Production Volume: Chemical substances may have both TSCA and non-TSCA uses. The

volumes associated with the uses of a chemical regulated by other agencies such as the Food and Drug Administration (FDA) need not be reported under the IUR; therefore, a chemical might have a higher overall production volume than is reported under the IUR. For instance, a substance such as canola oil has industrial appli

cations (uses for which it is considered a chemi

cal substance under TSCA) and food applica

tions (uses for which it would not be considered a chemical substance under TSCA). The volumes reported in response to the IUR should reflect only the volumes that meet the TSCA definition

of a chemical substance.

Chemicals Excluded From Reporting: Under the IUR, manufacturers are not required to report

information on certain chemical substances either because of the type of chemical substance or because of the manner of manufacture or

use of the chemical substance. These excluded

chemicals are in addition to those substances

not considered to be chemical substances under TSCA (see the related discussion in Introduc

tion ). In general, manufacturers are not required to report IUR information for polymers, microor

ganisms, naturally occurring chemical substanc

es, or certain natural gas streams. Chemical
substances that are non-isolated intermediates, imported as part of an article, or are impurities are exempted from IUR reporting. Byproducts not used for a separate, non-exempt commercial purpose are also exempt from reporting. Note that many byproducts that are recycled for a commercial purpose are reportable under IUR. 

### Definition: Naturally Occurring
Chemical Substances

**Naturally occurring chemical substances**

are defined for TSCA Inventory purposes as
any chemical substance which is naturally occurring and: (1) Which is (i) unprocessed or (ii) processed only by manual, mechanical,

or gravitational means; by dissolution in water; by flotation; or by heating solely
to remove water; or (2) Which is extracted from air by any
means, will automatically be included
in the inventory under the category “Naturally Occurring Chemical Substances.” Examples of such
substances are: raw agricultural commodities; water, air, natural gas, and
crude oil; and rocks, ores, and minerals.12 2006 Inventory Update Reporting: Data Summary Use of the IUR Data



### Manufacturers Excluded From Reporting: Small manufacturers are generally exempt from IUR requirements. Small manufacturers must meet one of the following requirements:

1. Total annual sales of the site, combined with those of the parent company, domestic or for

eign (if any), are less than $4 million regard

less of annual production volume; or

2. Total annual sales, combined with those of the parent company, domestic or foreign (if any), are less than $40 million, and the annual production volume of that substance does not exceed 100,000 pounds at any individual site.

Processing and Use Reporting Exclusions: Report

ing information on processing and use was not required for all chemicals reported in 2006. This information was only required for organic chemical substances manufactured in quanti

ties of 300,000 pounds or more at a site during calendar year 2005. Manufacturers of inorganic chemicals, multi-component petroleum process
streams, and certain other chemicals listed in the IUR regulation did not need to report the processing and use information 7 

### . However, manufacturers were required to report manufac

turing information for these partially exempted substances. (See 40 CFR 710.46(b) for additional information.)

• Reporting in Ranges— The following data ele

ments are reported under the IUR in ranges:

– The maximum concentration of a chemical

substance when manufactured or when used (in a commercial setting or by consumers).

– The number of manufacturing and the num

ber of industrial processing and use workers reasonably likely to be exposed to the chemi

cal substance.

– The number of industrial processing and use

sites. Reporting in ranges provides an overview of a given chemical industry, while reducing the industry reporting burden associated with devel

oping a precise number for these data elements. In addition, the use of ranges reflects the level of

detail available to the chemical manufacturers when providing information about the process

ing or use that is out of their direct control.

• Processing and Use Information Not Readily

Obtainable —Information associated with the domestic processing and use of a chemical sub

stance is reported by its manufacturers. Often the processing and use is not under the control of the IUR submitter; thus, companies reporting under IUR might have incomplete knowledge of the processing and/or use of their chemicals. Manufacturers were required to report this information to the extent that it was readily obtainable; they were not required to collect

information from their customers. Submitters either indicated that a particular data element was not readily obtainable or reported the information only for the portion of their produc

tion volume for which it was readily obtainable. Submitters were not required to report the amount that was exported. As a result of these factors, the reported industrial processing and use information represents an undercounting of the actual processing and use situation in the United States. The net result is that process and use information was available for 72 percent of the total reported production volume for organic chemicals for which the reporting of processing and use information was required. The reported

commercial and consumer use information ac

counted for 22 percent of this volume.

7 Reporting of processing and use information for these partially exempt chemicals was required if the chemical substance was sub ject to certain actions under TSCA, as specified in the introduction paragraph of 40 CFR 710.46.13 2006 Inventory Update Reporting: Data Summary 

### This chapter includes information needed to properly interpret the specific data presented. In addition, please refer to the section entitled What Should I Consider When Using the IUR Data? in Use of the IUR Data

.


### Manufacturing Data

As described in Introduction , the IUR data were re

ported by manufacturing sites. The manufacturing

data are associated with each chemical at the time of domestic manufacture or import and include the chemical’s domestically manufactured and import

ed production volume information, whether the
chemical was site-limited, the number of workers reasonably likely to be exposed to the chemical, its maximum concentration, and its physical form. An IUR submission comprises reports for all chemicals manufactured on a site-specific basis and includes the manufacturing data for each reportable chemi

cal domestically manufactured at that site or for which the import was controlled by that site.

Who reported?
More than 3,800 sites representing more than 1,500 companies reported information on 6,200 chemicals during the 2006 IUR submission period. As shown in Exhibit 4, slightly more than half of the chemi

cal substances were reported by only one site, and almost 80 percent were reported by three or fewer sites. Only 6 percent of the chemical substances were reported by more than 10 sites. This information indicates that there are few sources for the major

ity of the chemical substances in commerce in the

United States.

Submitters were required to identify whether their chemical was domestically manufactured, 

# Data Analysis and Key Findings



# T he following data analysis is a summary of the 2006 IUR data 8 

### , including confiden

tial as well as non-confidential data. In order to protect the confidentiality of the information, EPA has aggregated most of the data and, except in a few instances, has not provided company- or chemical-specific information. Non-confidential company- or chemical-specific information can be obtained on the IUR Web site ( www.epa.gov/iur ).

8 The data presented in this summary are based on version 1 of the 2006 IUR database. This is the same version used to develop the public data available on the IUR Web site ( www.epa.gov/iur .) 1 site

2 sites 3 sites

4-10 sites > 10 sites

51% 18% 9% 16% 6% 

### Exhibit 4. Percentage of Chemicals

Reported by the Number of Sites14 2006 Inventory Update Reporting: Data Summary Data Analysis and Key Findings



### imported, or both domestically manufactured and imported. Exhibit 5 illustrates the relationship be

tween the manufacturing and importing activities for both nationally aggregated chemical informa

tion and for individual reports. A report contains information for one chemical at a site; a site’s submission typically contains multiple reports. Note that only submitters who reported domestic manufacturing only could report their chemical as

site-limited.

Of the over 4,800 chemicals reported as domesti

cally manufactured, 63 percent were only domesti

cally manufactured and not imported. Similarly, of the over 3,100 chemicals reported as imported, 43 percent of the chemicals were imported only. As shown in Exhibit 5, nearly half of the reported chemicals were domestically manufactured only. While 29 percent of the chemicals were both im

ported and domestically manufactured, only two percent of the reports identified both activities. This exhibit also indicates that nearly 8 percent of
the chemical substances were site-limited, which means they were consumed at the site of domes

tic manufacture. Fourteen percent of the reports identified site-limited chemicals, indicating that sites may report different activities for the same

chemical.

Where Are the Chemicals Manufactured?
Sites that reported information were located in all 50 states, plus Puerto Rico, the Virgin Islands, and Washington, D.C. Some reporting sites were identi

fied as headquarters or broker locations reporting imports only, while others were sites domestically manufacturing chemicals (but who may have also imported the chemical). The following discussion provides a geographical look at the chemical indus

try in the United States. Domestic
Manufacture

Import Diagram is not to scale

Site-Limited

Chemical s* Repo rt s* *
Domest ic Manufactur e Only 3, 03 8 16 ,6 96 Impo rt Only 1, 36 6 8, 76 9
Domest ic Manufactur e an d Impo rt 1, 79 6 55 8 Si te -L imit ed 50 8 3, 71 9 

### Exhibit 5. Manufacturing, Importing, and Site-Limited Activities

* In the analysis by chemical, EPA considers a chemical

as “Domestic Manufacture Only” if ALL submitters report the chemical as domestic manufacture only. If a chemical
is reported as manufactured at one site and imported at another site, the chemical is considered as both domestically manufactured and imported.

** This column shows the site activities for the number of
individual reports submitted rather than by chemical. There are multiple reports for each chemical.15 2006 Inventory Update Reporting: Data Summary Data Analysis and Key Findings



### Information by EPA Region
Chemical manufacturers reported 6,200 chemicals with a total 2005 production volume of approxi

mately 27 trillion pounds. The map in Exhibit 6 presents the 10 EPA regions, and Exhibit 7 shows the distribution of the domestically manufactured and imported production volumes and the number of reported chemicals across the EPA regions. EPA Regions 4 (the south-eastern states) and 6 (the southern-central states) reported more than 80 percent of the production volume, followed by Re

gion 9 (the south-western states), which represents 5 percent of the total imported volume reported. The remaining seven regions accounted for about 15 percent of the total production volume.

Looking more closely at the breakout between do

mestically manufactured and imported production volumes, the imported volumes contributed less than 3 percent of the total production volume and are mainly concentrated in three regions. Imported volumes for Region 6 account for 38 percent of the total imported volume, followed closely by Region 3 (24 percent) and Region 5 (12 percent). Regions 8, 9, and 10 each reported imported volumes account

ing for approximately 5 percent of the total produc

tion volume, with the remaining imported volumes reported by sites in Regions 1, 2, 4, and 7. NJ

DE

MD DC VA OH

KY MI

SC NC

FL AL WV

GA TN IN

AR MO

OK KS IA WI MN

NE SD ND MT

WY

NM AZ UT NV

CA OR

ID WA

MS

TX LA PA NY

IL VT

NH

MA RI

CT ME

CO 10 AK 10

9 8

6 7 5 2 1

PR VI 2 3

4 HI 9

Guam
Tr ust Te rroritories
American Somo a Nor thern Mariana Islands 

### Exhibit 6. EPA Regions

0 2000 4000 6000 8000 10000 12000 14000 16000

1 2 3456 7 8 9 1 0
EPA RegionProduction Volume (billion pounds)

0 500 1000 1500 2000 2500 3000 3500Number of chemicals

Imported Production Volume

Manufactured Production Volume Number of Chemicals 

### Exhibit 7. Production Volumes and the

Number of Chemicals Reported by Each EPA Region16 2006 Inventory Update Reporting: Data Summary Data Analysis and Key Findings



### Information by State
Information by state is presented in three different ways – by number of sites, by production volume, and by number of chemicals. Exhibit 8 shows the

number of sites at which chemicals are manufac

tured in each state. Approximately half of the states had 50 or more sites reporting 2006 IUR informa

tion. Exhibit 9 illustrates the total reported produc

tion volume ranges in each state. More than half

of the states manufacture between 10 billion and 100 billion pounds. The largest manufacturers, with production volumes of 1 trillion pounds or greater,
are California, Texas, Florida, and Louisiana. These states account for approximately 86 percent of the total production volume. Exhibit 10 presents the top 10 states based on the total production volume and includes the number of chemicals reported for

these states. Examining the reporting of chemicals by produc

tion volume and number of chemicals, in addition to the number of sites, provides some insight into the distribution of the higher-volume chemicals. For instance, Texas is the top-ranked state based

on the number of chemicals but ranks third for total production volume with a total volume of more than 2 trillion pounds. Louisiana, on the other hand, has the largest production volume but

ranks fourth based on the number of chemicals. Both of these states have greater than 100 sites reporting under IUR and are located in Region 6, which has the greatest production volume. Florida ranks second overall in production volume but is not among the top five for the number of chemicals

manufactured.

HI AK

PR VI > 100

50 - 99

25 - 49

10 - 24

< 10 Number of Repo rt ing Site s

NJ

DE

MD DC VA OH

KY MI

SC NC

FL AL WV

GA TN IN

AR MO

OK KS IA WI MN

NE SD ND MT

WY

NM AZ UT NV

CA OR

ID WA

MS

TX LA PA NY

IL VT

NH

MA RI

CT ME

CO 

### Exhibit 8. Number of Reporting Sites in Each State17 2006 Inventory Update Reporting: Data Summary Data Analysis and Key Findings

NJ

DE

MD DC VA OH

KY MI

SC NC

FL AL WV

GA TN IN

AR MO

OK KS IA WI MN

NE SD ND MT

WY

NM AZ UT NV

CA OR

ID WA

AK

MS

TX LA PA NY

HI PR VI IL VT

NH

MA RI

CT ME >1 trillion

100 billion - 1 trillion

10 billion - 100 billion

1 billion - 10 billion

< 1 billion Pr oduction Vo lume Ra nges

CO 

### Exhibit 9. Total Production Volume Reported in Each State

0 4,000 8,000 12,000 16,000

LA FL TX CA VA AL IL GA KS OH

StateTotal Production Volume(billion lbs)

0 5,00 1,000 1,500 2,000Number of Chemicals

Total Production Volume Reported Chemicals 

### Exhibit 10. The Top 10 States by
Production Volume and the Number of Chemicals They Report18 2006 Inventory Update Reporting: Data Summary Data Analysis and Key Findings



### Factors that drive the total production volume reported for a given state can include:

•	 Chemical-specific volumes: A small number of high-production volume chemicals may be manufactured in a state. For example, sulfite liquor (green) (CAS RN 68131-30-6) is part of the pulping cycle (see Exhibit 13) and accounts for between 1 trillion and 5 trillion pounds of the production volume reported to the IUR.

•	 Number of chemicals reporting: A large number of chemicals may be manufactured in smaller

volumes within a state.

•	 Import sites: A site located within a given state may control the importation of a chemical but

distribute the chemical nationwide.

•	 Industrial byproducts: Byproducts produced at chemical manufacturing plants, power plants, and processing plants are reported under IUR. For example, between 100 billion and 105 billion pounds of Ashes (residues) (CAS RN 68131-74- 8) were reported in the 2006 reporting period. Ash is a byproduct of power generation and the majority of companies reporting this chemical are utilities. States with substantial power gen

eration would report larger volumes of ash. See

Exhibit 14.

Summary of Chemicals Reported
Exhibit 11 presents the top 25 chemicals based on the total production volume; the full list of the top 100 chemicals is presented in Exhibit A1 of the Appendix. The total production volume includes all reported production volumes under the 2006 IUR, including volumes that were claimed confi

dential. These 25 chemicals make up 84 percent of the total reported production volume, and the top 100 account for more than 94 percent of the total. A majority of these chemicals are produced during the refining of petroleum, although the top three chemicals are from the pulp and paper pulping cycle. Chemical-specific production volume infor

mation is available for all non-confidential chemi

cals on the IUR Web site ( www.epa.gov/iur ).

Exhibit 12 further refines the top chemicals list by removing site-limited volumes. Twenty out of the resulting 25 chemicals are produced during the refining of petroleum, and only one of the pulping cycle chemicals remains in the top 25. These 25 chemicals make up more than 10 percent of the total reported production volume, and the top 100 account for more than 19 percent. See Exhibit A2 of the Appendix for the full list of the top 100 chemi

cals based on the total production volume exclud

ing site-limited volumes.

Site-limited chemicals are manufactured and

used at the same site. The site-limited volumes were excluded from Exhibit 12 because, in general, exposures to consumers and the general popula

tion will be less than exposures for volumes that are not site-limited. In addition, many site-limited

chemicals are manufactured and used within a closed system, further limiting potential expo

sures to these chemicals. Note that, in comparing
Exhibits 11 and 12, some chemicals are included in both lists. Chemicals which appear in Exhibit 11 but not in Exhibit 12 have a significant volume of their production used at the site where they are domestically manufactured. Site-limited volumes contribute approximately 77 percent of the 27 tril

lion pounds reported.

Exhibits 13 and 14 provide background information for two different chemical manufacturing scenar

ios—the pulping cycle and fly ash manufactured by utilities. Background information on industries with high production volume chemicals may help put the production volume data in context.19 2006 Inventory Update Reporting: Data Summary Data Analysis and Key Findings

CAS Registry

Number Chemical Name Production Volume Range (billion pounds)

66071-92-9 Sulfite liquors and Cooking liquors, spent 15,000 to 20,000

68131-30-6 Sulfite liquors and Cooking liquors, green 1,000 to 5,000

68131-33-9 Sulfite liquors and Cooking liquors, white 1,000 to 5,000

64741-56-6 Residues (petroleum), vacuum 295 to 300

64741-45-3 Residues (petroleum), atm. tower 225 to 230

64741-57-7 Gas oils (petroleum), heavy vacuum 220 to 225

8008-20-6 Kerosene (petroleum) 205 to 210

64741-44-2 Distillates (petroleum), straight-run middle 200 to 205

8052-42-4 Asphalt 195 to 200

8002-05-9 Petroleum 175 to 180

64742-80-9 Distillates (petroleum), hydrodesulfurized middle 145 to 150

471-34-1 Carbonic acid calcium salt (1:1) 145 to 150

115-07-1 1-Propene 130 to 135

64741-41-9 Naphtha (petroleum), heavy straight-run 130 to 135

64741-42-0 Naphtha (petroleum), full-range straight-run 125 to 130

12168-85-3 Calcium oxide silicate (Ca 3 O(SiO 4 )) 120 to 125

64741-79-3 Coke (petroleum) 115 to 120

64741-54-4 Naphtha (petroleum), heavy catalytic cracked 105 to 110

68131-74-8 Ashes (residues) 100 to 105

64741-55-5 Naphtha (petroleum), light catalytic cracked 95 to 100

64741-59-9 Distillates (petroleum), light catalytic cracked 90 to 95

64741-46-4 Naphtha (petroleum), light straight-run 90 to 95

10034-77-2 Silicic acid (H 4 SiO 4 ), calcium salt (1:2) 85 to 90

68955-35-1 Naphtha (petroleum), catalytic reformed 85 to 90

64742-46-7 Distillates (petroleum), hydrotreated middle 75 to 80 

### Exhibit 11. Top 25 Chemicals Based on the Total Reported Production Volume20 2006 Inventory Update Reporting: Data Summary Data Analysis and Key Findings



### Exhibit 12. Top 25 Chemicals Based on the Total Reported Production Volume (Excluding Site-Limited Production Volumes)

CAS Registry

Number Chemical Name Production Volume Range (billion pounds)

8052-42-4 Asphalt 190 to 195

64741-56-6 Residues (petroleum), vacuum 190 to 195

64741-57-7 Gas oils (petroleum), heavy vacuum 185 to 190

8008-20-6 Kerosene (petroleum) 185 to 190

8002-05-9 Petroleum 175 to 180

64741-44-2 Distillates (petroleum), straight-run middle 165 to 170

64741-45-3 Residues (petroleum), atm. Tower 140 to 145

64742-80-9 Distillates (petroleum), hydrodesulfurized middle 140 to 145

115-07-1 1-Propene 130 to 135

64741-79-3 Coke (petroleum) 110 to 115

12168-85-3 Calcium oxide silicate (Ca 3 O(SiO 4 )) 100 to 105

64741-41-9 Naphtha (petroleum), heavy straight-run 100 to 105

64741-42-0 Naphtha (petroleum), full-range straight-run 95 to 100

68131-74-8 Ashes (residues) 90 to 95

64741-54-4 Naphtha (petroleum), heavy catalytic cracked 90 to 95

10034-77-2 Silicic acid (H 4 SiO 4 ), calcium salt (1:2) 85 to 90

64741-55-5 Naphtha (petroleum), light catalytic cracked 80 to 85

68955-35-1 Naphtha (petroleum), catalytic reformed 80 to 85

64742-46-7 Distillates (petroleum), hydrotreated middle 75 to 80

64741-46-4 Naphtha (petroleum), light straight-run 70 to 75

66071-92-9 Sulfite liquors and Cooking liquors, spent 70 to 75

65996-65-8 Iron ores, agglomerates 70 to 75

64741-59-9 Distillates (petroleum), light catalytic cracked 70 to 75

68553-00-4 Fuel oil, no. 6 70 to 75

64741-68-0 Naphtha (petroleum), heavy catalytic reformed 70 to 7521 2006 Inventory Update Reporting: Data Summary Data Analysis and Key Findings



### Exhibit 13. Chemicals in the Pulp and Paper Industry

The top three chemicals, by production volume, reported under the 2006 IUR were pulping liquors associated
with the pulping process (see the Appendix for a listing of the top 100 chemicals). The diagram below illustrates
this pulping process. Based on the TSCA Section 8 definition of manufacture, each section of the pulping cycle
is considered manufacturing of a chemical substance.

The papermaking process begins with the pulping of wood, accomplished by mixing white liquor with wood fiber and breaking down the fiber into pulp. A washing step separates the usable pulp destined to be made
into paper from a waste byproduct stream known as black liquor. The black liquor generated in a paper mill

was reported by companies in the paper mill industry during the initial TSCA Inventory reporting period and
is listed in the Inventory as “Sulfite liquors and cooking liquors, spent” and, therefore, is subject to reporting
under IUR. Black liquor is typically used for the production of energy, in the form of steam, and for producing inorganic substances that are recovered and used as precursors of pulping chemicals. A combustion process is
used to generate heat for process steam and results in the production of inorganic chemicals that collect in the
bottom of the boiler in the form of molten smelt. The smelt is dissolved in water to produce green liquor. During processing of the green liquor into white liquor, calcium oxide and calcium carbonate are also manufactured.

The pulp and paper industry is required to report information on the following substances generated in the
above pulping process:

•	 Black liquor (or spent pulping liquors) (CAS RN: 66071-92-9) •	 Green liquor (or smelt) (CAS RN: 68131-30-6)
•	 White liquor (CAS RN: 68131-33-9) •	 Calcium carbonate (CAS RN: 471-34-1) •	 Calcium oxide (CAS RN: 1305-79-9)

The total reported volume for these five chemicals is between 15 trillion and 20 trillion pounds. The highly repetitive nature of this loop or regeneration process, which results in the manufacture of these substances during each cycle of the loop, can lead to the large production volumes reported under IUR. Lime Burning

Causticizing Evaporation

Burning Pulping Paper
mill

Paper

mill Washing

Bleaching Pulp

Pulp Drying Re-burned
lime Lime
mud White liquor

Green liquor Smelt Black liquor

Lime mud = calcium carbonate
Re-burned lime = calcium oxide22 2006 Inventory Update Reporting: Data Summary Data Analysis and Key Findings



### Exhibit 14. Production and Use of Fly Ash from Coal-Fired Power Plants

The diagram above depicts the coal-combustion process, which generates fly ash, or ashes (residues) (CAS RN: 68131-74-8) as a residual. The components of fly ash can vary based on the source of the coal being burned
but primarily consist of silicon dioxide (SiO 2 ) (amorphous and crystalline) and calcium oxide (CaO). In the past, fly ash was generally captured and collected by electrostatic precipitators or filter bags and disposed of in a landfill. People are increasingly finding beneficial uses for fly ash, including usage in:

•	 Portland cement and grout •	 Embankments and structural fill
•	 Waste stabilization and solidification
•	 Mine reclamation •	 Stabilization of soft soils
•	 Road sub-base •	 Aggregate
•	 Flowable fill
•	 Mineral filler in asphaltic concrete •	 Minor applications in cellular concrete, geopolymers, roofing tiles, paints, metal castings, and filler in wood
and plastic products.

Between 100 billion and 105 billion pounds of fly ash were reported in the 2006 IUR. Coal
Pulverizer

Heated Air Precipitator

To stack

Fly Ash (Recovery or Disposal)

Bottom Ash (Disposal or Reuse) Ash Hoppers Flame Coal
Pulverizer

Heated Ai r P recipitator

To stac k

Fly Ash (Recovery or Disposal)

Bottom Ash (Disposal or Reuse) Ash Hoppers Flame23 2006 Inventory Update Reporting: Data Summary Data Analysis and Key Findings



### Additional Manufacturing-Related Information
In the 2006 IUR reporting cycle, submitters were required to report exposure-related manufacturing data, including the number of workers potentially exposed during manufacturing, the maximum con

centration of a chemical when manufactured, and the percent of production volume by physical form.

Exhibit 15 represents the number of times each manufacturing worker range was reported. Sub

mitters were required to report the number of manufacturing workers that were reasonably likely to be exposed to each chemical reported by their site. Of the 26,397 reports submitted, potential ex

posures to 10,000 workers or greater were reported 60 times. Manufacturing worker ranges of less than 10 and between 100 and 499 were most frequently reported.

The physical form of a chemical and its concen

tration in a mixture are factors in the assessment of exposure of workers to that chemical. Exhibit

16 illustrates that most chemicals were manu

factured at relatively high concentrations, i.e. 90 percent or greater by weight. Exhibit 17 shows the number of chemicals reported for each physi

cal form and the associated production volume. Liquids account for approximately 85 percent of the reported production volume and were the top reported physical form. 6435

3347 2999 3771 7034

1432 1319

60 0 2,000 4,000 6,000 8,000 10,000

<10 10-24 25-49 50-99 100-499 500-999 1,000-9,999 10,000+

Number of Manufacturing WorkersNumber of Times Reported 

### Exhibit 15. Number of Times Submitters Reported a Particular Range of the Number of Manufacturing Workers

0 5,000 10,000 15,000 20,000

<1% 1-30% 31-60% 61-90% >90%

Maximum ConcentrationNumber of Times Reported Import Both Manufacture 

### Exhibit 16. Number of Times Submitters Reported a Particular Range of Maximum Concentration24 2006 Inventory Update Reporting: Data Summary Data Analysis and Key Findings



### Industrial Processing and Use Data
For the first time, the 2006 IUR required submit

ters to report information on industrial processing

and use and commercial and consumer uses of the chemicals they manufacture at a site in quantities of 300,000 pounds or greater. This section discusses the industrial processing and use information collected about organic chemicals that meet the reporting requirements. For the 2006 IUR, manu

facturers were not required to report processing and use information on their inorganic chemicals or on partially exempt chemicals.

For industrial processing and use, submitters provided data on unique combinations of the fol

lowing:

•	 The processing and use codes, which designate

how chemicals are used at an industrial site. Reporters selected one of the following:

– Processing as a reactant

– Processing—incorporation into formulation, mixture, or reaction product – Processing—incorporation into an article

– Processing —repackaging

– Use—non-incorporative activities

•	 North American Industrial Classification System (NAICS) codes, which define the industry using

the chemical

•	 Industrial function categories, which define the

function of each chemical. Submitters selected from a list of 33 categories, which include adsor

bents, adhesives, coloring agents, and solvents.

Together, these three data elements define a use

scenario. EPA can use the scenarios to evaluate chemicals for exposure characterization and priori

ty-setting purposes. Submitters also had the option to report “Not Readily Obtainable” for each of the

three data elements. See Use of the IUR Data for a discussion on considering “Not Readily Obtainable” when interpreting the IUR data.

Exhibits 18, 19, and 20 summarize the number of chemicals for which sites reported each of the three data elements. The IUR requires submitters to identify a five-digit NAICS code. Due to the large number of NAICS codes reported under IUR, EPA truncated the code to a three-digit number for the purpose of summarizing the major industry sec

tors in this document. Of the approximately 2,800 chemicals for which submitters were required to report industrial processing and use information, 86 percent are classified in the chemical manufac

turing industry (NAICS code 325), and 57 percent are manufactured for further processing as a
formulation or as a reactant. Over 1,300 chemicals were reported to be used as intermediates.

Exhibit 21 presents the 25 most frequently reported three-code combinations for the 2006 reporting period. Due to the number of confidentiality claims asserted, EPA is not presenting information in this document on the number of processing sites, the number of potentially exposed industrial workers, or the percent production volume for each unique

three-code combination. 0 1,000 2,000 3,000 4,000 5,000 6,000

Dry Powder Pellets or Large Crystals Water or Solvent Wet Solid Solid Gas/Vapor LiquidNumber of Chemicals

0 50,000 100,000 150,000 200,000 250,000 300,000 350,000Associated Production Volume (billion lbs)

Total Production Volume

Number of Chemicals 

### Exhibit 17. Number of Chemicals Reported for Each Physical Form and

the Associated Production Volumes25 2006 Inventory Update Reporting: Data Summary Data Analysis and Key Findings

Process or Use Category Number of Chemicals

Processing—incorporation into formulation, mixture, or reaction product 1,640

Processing as a reactant 1,590

Use—nonincorporative activities 471

Processing—repackaging 453

Processing—incorporation into article 389

Not Readily Obtainable 337 

### Exhibit 18. Number of Chemicals in Each Process or Use Category

Exhibit 19. Most Frequently Reported Three-Digit NAICS Codes

3-Digit NAICS NAICS Description Number of Chemicals

325 Chemical Manufacturing 2,468

326 Plastics and Rubber Products Manufacturing 378

324 Petroleum and Coal Products Manufacturing 309

424 Merchant Wholesalers, Nondurable Goods 277

322 Paper Manufacturing 130

211 Oil and Gas Extraction 117

311 Food Manufacturing 104

313 Textile Mills 77

327 Nonmetallic Mineral Product Manufacturing 72

336 Transportation Equipment Manufacturing 6126 2006 Inventory Update Reporting: Data Summary Data Analysis and Key Findings



### Exhibit 20. Number of Chemicals in Each Industrial Function Category

Industrial Function Number of Chemicals

Intermediates 1,333

Surface active agents 311

Lubricants 272

Processing aid, not otherwise listed 248

Functional fluids 226

Solvents (which become part of product formulation or mixture) 188

Adhesives and binding agents 184

Process regulators, used in vulcanization or polymerization processes 180

Stabilizers 165

Fuels 149

Corrosion inhibitors and anti-scaling agents 116

Odor agents 104

Solvents (for cleaning or degreasing) 87

Agricultural chemicals (nonpesticidal) 85

Solvents (for chemical manufacture and processing and are not part of product at greater than 1% by weight) 80

Process regulators, other than polymerization or vulcanization processes 76

Viscosity adjustors 67

Flame retardants 63

Coloring agents, pigments 63

Coloring agents, dyes 50

Flotation agents 36

Photosensitive chemicals 32

pH-regulating agents 32

Plating agents and metal surface treating agents 24

Fillers 2327 2006 Inventory Update Reporting: Data Summary Data Analysis and Key Findings



### Exhibit 20. (continued)

Industrial Function Number of Chemicals

Anti-adhesive agents 14

Reducing agents 13

Adsorbents and absorbents 12

Bleaching agents 12

Fixing agents 12

Oxidizing agents 10

Aerosol propellants 6

Other 841

Not Readily Obtainable 419

Type of Process or Use 5-digit NAICS Description Industrial Function Number of Chemicals

Processing as a reactant Other Basic Organic Chemical Manufacturing Intermediates 734

Processing as a reactant Resin and Synthetic Rubber Manufacturing Intermediates 200

Processing as a reactant All Other Chemical Product and Preparation Manufacturing Intermediates 157

Processing as a reactant Pesticide and Other Agricultural Chemical Manufacturing Intermediates 137

Processing—incorporation
into formulation, mixture, or reaction product Other Basic Organic Chemical Manufacturing Other 131

Processing as a reactant Other Basic Organic Chemical Manufacturing Other 124

Processing as a reactant Petrochemical Manufacturing Intermediates 121 

### Exhibit 21. Most Frequently Reported Use Scenarios Based on Unique Combinations of Process or Use, Five-digit NAICS, and Industrial Function Categories: Number of Chemicals Reported28 2006 Inventory Update Reporting: Data Summary Data Analysis and Key Findings

Type of Process or Use 5-digit NAICS Description Industrial Function Number of Chemicals

Processing--incorporation
into formulation, mixture, or reaction product Soap and Cleaning Compound Manufacturing Surface active agents 109

Processing--incorporation
into formulation, mixture, or reaction product All Other Chemical Product and Preparation Manufacturing Other 102

Processing--incorporation
into formulation, mixture, or reaction product Other Basic Organic Chemical Manufacturing Intermediates 101

Processing as a reactant Soap and Cleaning Compound Manufacturing Intermediates 96

Processing--incorporation
into formulation, mixture, or reaction product Other Basic Organic Chemical Manufacturing Lubricants 70

Processing--incorporation
into formulation, mixture, or reaction product Other Basic Organic Chemical Manufacturing Solvents (which
become part of product formulation

or mixture) 70

Processing--incorporation
into formulation, mixture, or reaction product All Other Chemical Product and Preparation Manufacturing Not Readily Obtainable 66

Processing--incorporation
into formulation, mixture, or reaction product All Other Chemical Product and Preparation Manufacturing Functional fluids 62

Processing--incorporation
into formulation, mixture, or reaction product All Other Chemical Product and Preparation Manufacturing Lubricants 61

Processing--repackaging Other Basic Organic Chemical Manufacturing Intermediates 61

Processing--incorporation
into formulation, mixture, or reaction product Other Basic Organic Chemical Manufacturing Process regulators,
used in vulcanization

or polymerization

processes 51 

### Exhibit 21. (continued)29 2006 Inventory Update Reporting: Data Summary Data Analysis and Key Findings



### Commercial and Consumer Use Data
The 2006 IUR required submitters manufacturing 300,000 pounds or more of a chemical at a site to

indicate whether these chemicals have commercial
or consumer uses. More than 2,100 chemicals were reported as being incorporated into products with

commercial and consumer uses. Exhibit 22 sum

marizes the number of unique chemicals reported and the total times submitters reported each prod

uct category. Note that chemicals may be reported under multiple categories. For each product cat

egory reported, submitters had to indicate whether the chemical was present in products intended for use by children up to 14 years of age. Exhibit 23 shows that only 10 percent of the chemicals reported were used in products intended for use by
children. As with industrial uses, submitters could

indicate that the commercial and consumer data were not readily obtainable. Type of Process or Use 5-digit NAICS Description Industrial Function Number of Chemicals

Processing as a reactant Paint and Coating Manufacturing Intermediates 50

Processing—incorporation
into formulation, mixture, or reaction product Other Petroleum and Coal Products Manufacturing Lubricants 50

Processing—incorporation
into formulation, mixture, or reaction product Adhesive Manufacturing Adhesives and binding agents 48

Not Readily Obtainable Other Basic Organic Chemical Manufacturing Surface active agents 46

Processing—repackaging Other Basic Organic Chemical Manufacturing Other 46

Processing—incorporation
into formulation, mixture, or reaction product All Other Chemical Product and Preparation Manufacturing Odor agents 45

Processing as a reactant Resin and Synthetic Rubber Manufacturing Other 43 

### Exhibit 21. (continued)30 2006 Inventory Update Reporting: Data Summary Data Analysis and Key Findings



### EPA defines “intended for use by children” to mean

the chemical substance or mixture is used in or on a product that is specifically intended for use by children age 14 or younger. The chemical substance or mixture is intended for use by children if it satis

fies at least one of the following questions for the product that incorporates the chemical substance

or mixture:

1. Is the product commonly recognized (i.e., by a reasonable person) as being intended for chil

dren up to the age of 14?

2. Does the manufacturer of the product state through product labeling or other written mate

rials that the product is intended or will be used by children up to the age of 14?

3. Is the advertising, promotion, or marketing of the product aimed at children up to the age of

14?

If a submitter answered “yes” to any of these ques

tions, they should have indicated “yes” for intended use in a children’s product.



### Exhibit 22. Number of Chemicals and Reporting Frequency for the Commercial and Consumer Category

Commercial and Consumer Product Category Number of Chemicals Number of Times Reported

Rubber and plastic products 480 747

Paints and coatings 335 498

Lubricants, greases and fuel additives 303 475

Soaps and detergents 271 444

Adhesives and sealants 221 335

Paper products 147 242

“Fabrics, textiles and apparel” 124 146

Agricultural products (non-pesticidal) 108 173

Electrical and electronic products 107 132 

### Definition: Commercial Use and
Consumer Use

For purposes of IUR reporting, a **commercial**

**use** means the use of a chemical substance or mixture in a commercial enterprise providing
saleable goods or a service (such as painting
contractors using paint products).

A **consumer use**
, on the other hand, means the use of a chemical substance that is directly, or as part of a mixture, sold to or made available to consumers for their own

use in or around a residence or in or around a school or recreational area.31 2006 Inventory Update Reporting: Data Summary Data Analysis and Key Findings



### Exhibit 22. (continued)

Commercial and Consumer Product Category Number of Chemicals Number of Times Reported

Transportation products 87 131

Automotive care products 85 110

Polishes and sanitation goods 63 79

Wood and wood furniture 57 82

Metal products 47 60

Photographic supplies 41 44

Glass and ceramic products 25 35

Lawn and garden products (non-pesticidal) 24 29

Leather products 23 24

Artists supplies 17 19

Other 1052 2015

Not Readily Obtainable 427 903



### Exhibit 23. Number of Chemicals in Products Intended for Use by Children

Use in Children’s Products Number of Chemicals*

Chemicals with Reported Commercial/Consumer Uses 2,118

Chemicals with Reports of “Yes” for Children’s Use 232

Chemicals with Reports of “No” for Children’s Use 1,639

Chemicals with Reports of “NRO” for Children’s Use 814

*Each unique chemical may have reports of both Yes and No or Not Readily Obtainable for children’s use; therefore, the sum of the Yes, No, and Not Readily Obtainable responses is greater than the number of chemicals for which commercial and consumer uses were reported.32 2006 Inventory Update Reporting: Data Summary 

### Additional Analyses
EPA plans to release additional analyses and

summaries of the 2006 IUR data. The additional analyses are expected to include information on chemicals with a reported use in products intended for children, the top chemicals in consumer prod

ucts, and the top chemicals with the most workers reasonably likely to be exposed. The additional analyses and other summary information will be

available in the near future.



### TSCA Inventory Reset

Some of the chemical substances on the TSCA Inventory are no longer domestically manufactured in or imported into the United States; therefore, EPA is considering resetting the TSCA Inventory to more accurately reflect the chemical substances actually in commerce. EPA’s ideas are outlined in Background Discussion Piece: EPA’s TSCA Inventory

Reset , which is available on the ChAMP Web site ( www.epa.gov/CHAMP/pubs/invresetdiscussion.htm ).

A reset TSCA Inventory would provide a more meaningful and usable resource for the Agency, the environmental community, industry, and the public by reflecting only those chemical substances actually in commerce in the United States. The resulting, more accurate TSCA Inventory would allow EPA to better plan and execute its mission of protecting human health and the environment from chemicals that might present risks. EPA is committed to resetting the TSCA Inventory, but the concept is still in the early stages of development.



### 2011 Collection Period
The next IUR submission period will occur June 1 through September 30, 2011. Domestic manu

facturers and importers will be required to report information on their 2010 manufacturing, process

ing, and use activities. To minimize problems with the 2011 IUR data, increase the data’s usefulness, and prevent delays with the release of the associ

ated database, EPA is exploring ways to address the issues that were encountered during the 2006 submission period and the Agency’s subsequent database development and data use. Proposed changes to the IUR rule, improvements in guidance and training materials, and enhancements to EPA’s internal process will help to address some of these issues before the next reporting cycle. 

# Next Steps



# E PA is continually working to improve the IUR public database and plans to release additional non-confidential data pertaining to the 2006 reported information. The Agency was not able to release a complete and final version of the current database due to the need to address chemical identity errors requiring correction by the submitter. The errors included: submitters not specifically identifying a chemical substance, provid

ing chemical names and CAS Registry Numbers that did not match, and providing a CAS Registry Number that did not exist. EPA continues efforts to obtain corrections for these submissions and will include corrected information with a future version of the public

database. 2006 Public Database33 2006 Inventory Update Reporting: Data Summary Next Steps



### EPA hopes to dramatically increase the percentage of electronically submitted IUR data in the future. One approach to handling this issue is to require the use of the IUR reporting software (eIUR) and to require electronic submissions over the Inter

net as the only means of reporting for the 2011 IUR. Data submitted over the Internet through the Central Data Exchange (CDX) system were easily incorporated into the database and, due to the eIUR validation requirements, were internally
consistent. The eIUR, which was needed in order to submit using CDX, contained a validation step that helped to ensure the completeness and consistency

of the submission. Information submitted on a CD or in hardcopy was more likely to be damaged in transport, to be misinterpreted when scanned into
the database, and to contain inconsistent and er

roneous information.

Electronic submissions will ensure that IUR data will have completed a basic validation check, be quickly incorporated into a database and ready for immediate Agency use, and not be subject to subsequent data entry errors. The Agency is also considering immediately rejecting incomplete or incorrectly submitted IUR reports.

EPA is also exploring how to make the IUR data more useful, including ways to reduce seemingly

excessive claims of confidential information and to encourage an increased level of reporting for the processing and use information. EPA will provide opportunities for the public to comment on pro

posed 2011 IUR regulatory changes.34 2006 Inventory Update Reporting: Data Summary 

# Appendix

CAS Registry

Number Chemical Name Production Volume Range (billion pounds)

66071-92-9 Sulfite liquors and Cooking liquors, spent 15,000 to 20,000

68131-30-6 Sulfite liquors and Cooking liquors, green 1,000 to 5,000

68131-33-9 Sulfite liquors and Cooking liquors, white 1,000 to 5,000

64741-56-6 Residues (petroleum), vacuum 295 to 300

64741-45-3 Residues (petroleum), atm. tower 225 to 230

64741-57-7 Gas oils (petroleum), heavy vacuum 220 to 225

8008-20-6 Kerosine (petroleum) 205 to 210

64741-44-2 Distillates (petroleum), straight-run middle 200 to 205

8052-42-4 Asphalt 195 to 200

8002-05-9 Petroleum 175 to 180

64742-80-9 Distillates (petroleum), hydrodesulfurized middle 145 to 150

471-34-1 Carbonic acid calcium salt (1:1) 145 to 150

115-07-1 1-Propene 130 to 135

64741-41-9 Naphtha (petroleum), heavy straight-run 130 to 135

64741-42-0 Naphtha (petroleum), full-range straight-run 125 to 130

12168-85-3 Calcium oxide silicate (Ca 3 O(SiO 4 )) 120 to 125

64741-79-3 Coke (petroleum) 115 to 120

64741-54-4 Naphtha (petroleum), heavy catalytic cracked 105 to 110

68131-74-8 Ashes (residues) 100 to 105

64741-55-5 Naphtha (petroleum), light catalytic cracked 95 to 100

64741-59-9 Distillates (petroleum), light catalytic cracked 90 to 95

64741-46-4 Naphtha (petroleum), light straight-run 90 to 95

10034-77-2 Silicic acid (H 4 SiO 4 ), calcium salt (1:2) 85 to 90 

### Exhibit A1. Top 100 Chemicals Based on Total Reported Production Volume35 2006 Inventory Update Reporting: Data Summary Appendix

CAS Registry

Number Chemical Name Production Volume Range (billion pounds)

68955-35-1 Naphtha (petroleum), catalytic reformed 85 to 90

64742-46-7 Distillates (petroleum), hydrotreated middle 75 to 80

7664-93-9 Sulfuric acid 75 to 80

64741-63-5 Naphtha (petroleum), light catalytic reformed 75 to 80

64741-68-0 Naphtha (petroleum), heavy catalytic reformed 75 to 80

65996-65-8 Iron ores, agglomerates 70 to 75

68553-00-4 Fuel oil, no. 6 70 to 75

74-98-6 Propane 70 to 75

64742-48-9 Naphtha (petroleum), hydrotreated heavy 70 to 75

65996-67-0 Iron, furnace 65 to 70

64742-81-0 Kerosine (petroleum), hydrodesulfurized 65 to 70

64741-60-2 Distillates (petroleum), intermediate catalytic cracked 65 to 70

68476-34-6 Fuels, diesel, no. 2 60 to 65

64741-58-8 Gas oils (petroleum), light vacuum 60 to 65

68476-30-2 Fuel oil, no. 2 55 to 60

1305-78-8 Calcium oxide (CaO) 55 to 60

64742-59-2 Gas oils (petroleum), hydrotreated vacuum 55 to 60

74-85-1 Ethene 50 to 55

106-97-8 Butane 45 to 50

64741-43-1 Gas oils (petroleum), straight-run 45 to 50

64741-81-7 Distillates (petroleum), heavy thermal cracked 45 to 50

64741-64-6 Naphtha (petroleum), full-range alkylate 45 to 50

70592-78-8 Distillates (petroleum), vacuum 45 to 50

64741-87-3 Naphtha (petroleum), sweetened 40 to 45

64742-79-6 Gas oils (petroleum), hydrodesulfurized 40 to 45

64741-82-8 Distillates (petroleum), light thermal cracked 40 to 45 

### Exhibit A1. (continued)36 2006 Inventory Update Reporting: Data Summary Appendix

CAS Registry

Number Chemical Name Production Volume Range (billion pounds)

68915-97-9 Gas oils (petroleum), straight-run, high-boiling 40 to 45

68919-37-9 Naphtha (petroleum), full-range reformed 40 to 45

64742-93-4 Asphalt, oxidized 35 to 40

64742-86-5 Gas oils (petroleum), hydrodesulfurized heavy vacuum 35 to 40

64742-49-0 Naphtha (petroleum), hydrotreated light 35 to 40

68410-00-4 Distillates (petroleum), crude oil 35 to 40

12068-35-8 Aluminum calcium iron oxide (AlCa 2 FeO 5 ) 35 to 40

7664-41-7 Ammonia 35 to 40

124-38-9 Carbon dioxide 35 to 40

64741-62-4 Clarified oils (petroleum), catalytic cracked 35 to 40

64742-38-7 Distillates (petroleum), clay-treated middle 35 to 40

1344-28-1 Aluminum oxide (Al 2 O 3 ) 35 to 40

65996-71-6 Slags, steelmaking 30 to 35

64742-82-1 Naphtha (petroleum), hydrodesulfurized heavy 30 to 35

68477-85-0 Gases (petroleum), C4-rich 30 to 35

12042-78-3 Aluminum calcium oxide (Al 2 Ca 3 O 6 ) 30 to 35

68527-19-5 Hydrocarbons, C1-4, debutanizer fraction 30 to 35

68606-11-1 Gasoline, straight-run, topping-plant 30 to 35

64742-73-0 Naphtha (petroleum), hydrodesulfurized light 25 to 30

64742-47-8 Distillates (petroleum), hydrotreated light 25 to 30

65996-77-2 Coke (coal) 25 to 30

68308-27-0 Fuel gases, refinery 25 to 30

64741-70-4 Naphtha (petroleum), isomerization 25 to 30

68333-25-5 Distillates (petroleum), hydrodesulfurized light catalytic cracked 25 to 30

68955-27-1 Distillates (petroleum), petroleum residues vacuum 25 to 30

107-06-2 Ethane, 1,2-dichloro- 25 to 30 

### Exhibit A1. (continued)37 2006 Inventory Update Reporting: Data Summary Appendix



### Exhibit A1. (continued)

CAS Registry

Number Chemical Name Production Volume Range (billion pounds)

74-84-0 Ethane 20 to 25

64741-77-1 Distillates (petroleum), light hydrocracked 20 to 25

68410-63-9 Natural gas, dried 20 to 25

64741-78-2 Naphtha (petroleum), heavy hydrocracked 20 to 25

68476-46-0 Hydrocarbons, C3-11, catalytic cracker distillates 20 to 25

75-28-5 Propane, 2-methyl- 20 to 25

65997-19-5 Steel manufacture, chemicals 20 to 25

68478-17-1 Residues (petroleum), heavy coker gas oil and vacuum gas oil 20 to 25

68783-08-4 Gas oils (petroleum), heavy atmospheric 20 to 25

64741-69-1 Naphtha (petroleum), light hydrocracked 20 to 25

65996-69-2 Slags, ferrous metal, blast furnace 20 to 25

7704-34-9 Sulfur 20 to 25

68334-30-5 Fuels, diesel 20 to 25

64741-47-5 Natural gas condensates (petroleum) 20 to 25

68475-57-0 Alkanes, C1-2 20 to 25

7782-50-5 Chlorine 20 to 25

68915-96-8 Distillates (petroleum), heavy straight-run 20 to 25

8030-30-6 Naphtha 20 to 25

70592-77-7 Distillates (petroleum), light vacuum 15 to 20

71-43-2 Benzene 15 to 20

57-13-6 Urea 15 to 20

7783-28-0 Phosphoric acid, ammonium salt (1:2) 15 to 20

64741-76-0 Distillates (petroleum), heavy hydrocracked 15 to 20

1309-37-1 Iron oxide (Fe 2 O 3 ) 15 to 20

1310-73-2 Sodium hydroxide (Na(OH)) 15 to 2038 2006 Inventory Update Reporting: Data Summary Appendix

CAS Registry

Number Chemical Name Production Volume Range (billion pounds)

8052-42-4 Asphalt 190 to 195

64741-56-6 Residues (petroleum), vacuum 190 to 195

64741-57-7 Gas oils (petroleum), heavy vacuum 185 to 190

8008-20-6 Kerosine (petroleum) 185 to 190

8002-05-9 Petroleum 175 to 180

64741-44-2 Distillates (petroleum), straight-run middle 165 to 170

64741-45-3 Residues (petroleum), atm. tower 140 to 145

64742-80-9 Distillates (petroleum), hydrodesulfurized middle 140 to 145

115-07-1 1-Propene 130 to 135

64741-79-3 Coke (petroleum) 110 to 115

12168-85-3 Calcium oxide silicate (Ca 3 O(SiO 4 )) 100 to 105

64741-41-9 Naphtha (petroleum), heavy straight-run 100 to 105

64741-42-0 Naphtha (petroleum), full-range straight-run 95 to 100

68131-74-8 Ashes (residues) 90 to 95

64741-54-4 Naphtha (petroleum), heavy catalytic cracked 90 to 95

10034-77-2 Silicic acid (H 4 SiO 4 ), calcium salt (1:2) 85 to 90

64741-55-5 Naphtha (petroleum), light catalytic cracked 80 to 85

68955-35-1 Naphtha (petroleum), catalytic reformed 80 to 85

64742-46-7 Distillates (petroleum), hydrotreated middle 75 to 80

64741-46-4 Naphtha (petroleum), light straight-run 70 to 75

66071-92-9 Sulfite liquors and Cooking liquors, spent 70 to 75

65996-65-8 Iron ores, agglomerates 70 to 75

64741-59-9 Distillates (petroleum), light catalytic cracked 70 to 75

68553-00-4 Fuel oil, no. 6 70 to 75

64741-68-0 Naphtha (petroleum), heavy catalytic reformed 70 to 75 

### Exhibit A2. Top 100 Chemicals Based on the Total Reported Production Volume (Excluding Site-Limited Production Volumes)39 2006 Inventory Update Reporting: Data Summary Appendix



### Exhibit A2. (continued)

CAS Registry

Number Chemical Name Production Volume Range (billion pounds)

74-98-6 Propane 65 to 70

64741-60-2 Distillates (petroleum), intermediate catalytic cracked 65 to 70

64742-81-0 Kerosine (petroleum), hydrodesulfurized 60 to 65

68476-34-6 Fuels, diesel, no. 2 60 to 65

68476-30-2 Fuel oil, no. 2 55 to 60

7664-93-9 Sulfuric acid 50 to 55

74-85-1 Ethene 45 to 50

65996-67-0 Iron, furnace 45 to 50

64741-63-5 Naphtha (petroleum), light catalytic reformed 45 to 50

68131-30-6 Sulfite liquors and Cooking liquors, green 45 to 50

106-97-8 Butane 40 to 45

64741-64-6 Naphtha (petroleum), full-range alkylate 40 to 45

64742-48-9 Naphtha (petroleum), hydrotreated heavy 40 to 45

64741-58-8 Gas oils (petroleum), light vacuum 40 to 45

64741-87-3 Naphtha (petroleum), sweetened 40 to 45

64742-93-4 Asphalt, oxidized 35 to 40

68915-97-9 Gas oils (petroleum), straight-run, high-boiling 35 to 40

68919-37-9 Naphtha (petroleum), full-range reformed 35 to 40

12068-35-8 Aluminum calcium iron oxide (AlCa 2 FeO 5 ) 35 to 40

68410-00-4 Distillates (petroleum), crude oil 35 to 40

124-38-9 Carbon dioxide 35 to 40

64742-38-7 Distillates (petroleum), clay-treated middle 35 to 40

1344-28-1 Aluminum oxide (Al 2 O 3 ) 35 to 40

1305-78-8 Calcium oxide (CaO) 30 to 35

7664-41-7 Ammonia 30 to 3540 2006 Inventory Update Reporting: Data Summary Appendix

CAS Registry

Number Chemical Name Production Volume Range (billion pounds)

65996-71-6 Slags, steelmaking 30 to 35

64741-62-4 Clarified oils (petroleum), catalytic cracked 30 to 35

64742-86-5 Gas oils (petroleum), hydrodesulfurized heavy vacuum 30 to 35

64742-49-0 Naphtha (petroleum), hydrotreated light 30 to 35

12042-78-3 Aluminum calcium oxide (Al 2 Ca 3 O 6 ) 25 to 30

64742-79-6 Gas oils (petroleum), hydrodesulfurized 25 to 30

68606-11-1 Gasoline, straight-run, topping-plant 25 to 30

68131-33-9 Sulfite liquors and Cooking liquors, white 25 to 30

64742-82-1 Naphtha (petroleum), hydrodesulfurized heavy 25 to 30

65996-77-2 Coke (coal) 25 to 30

64742-59-2 Gas oils (petroleum), hydrotreated vacuum 25 to 30

64741-81-7 Distillates (petroleum), heavy thermal cracked 25 to 30

68333-25-5 Distillates (petroleum), hydrodesulfurized light catalytic cracked 25 to 30

64742-47-8 Distillates (petroleum), hydrotreated light 25 to 30

64741-43-1 Gas oils (petroleum), straight-run 25 to 30

68477-85-0 Gases (petroleum), C4-rich 25 to 30

64741-70-4 Naphtha (petroleum), isomerization 20 to 25

74-84-0 Ethane 20 to 25

68410-63-9 Natural gas, dried 20 to 25

68476-46-0 Hydrocarbons, C3-11, catalytic cracker distillates 20 to 25

70592-78-8 Distillates (petroleum), vacuum 20 to 25

64741-47-5 Natural gas condensates (petroleum) 20 to 25

65997-19-5 Steel manufacture, chemicals 20 to 25

68334-30-5 Fuels, diesel 20 to 25

68475-57-0 Alkanes, C1-2 20 to 25 

### Exhibit A2. (continued)41 2006 Inventory Update Reporting: Data Summary Appendix

CAS Registry

Number Chemical Name Production Volume Range (billion pounds)

7704-34-9 Sulfur 20 to 25

75-28-5 Propane, 2-methyl- 20 to 25

64741-82-8 Distillates (petroleum), light thermal cracked 20 to 25

68955-27-1 Distillates (petroleum), petroleum residues vacuum 15 to 20

68478-17-1 Residues (petroleum), heavy coker gas oil and vacuum gas oil 15 to 20

64741-69-1 Naphtha (petroleum), light hydrocracked 15 to 20

71-43-2 Benzene 15 to 20

57-13-6 Urea 15 to 20

65996-69-2 Slags, ferrous metal, blast furnace 15 to 20

7783-28-0 Phosphoric acid, ammonium salt (1:2) 15 to 20

1309-37-1 Iron oxide (Fe 2 O 3 ) 15 to 20

64741-78-2 Naphtha (petroleum), heavy hydrocracked 15 to 20

64741-77-1 Distillates (petroleum), light hydrocracked 15 to 20

7782-50-5 Chlorine 15 to 20

64742-73-0 Naphtha (petroleum), hydrodesulfurized light 15 to 20

1310-73-2 Sodium hydroxide (Na(OH)) 15 to 20

68783-08-4 Gas oils (petroleum), heavy atmospheric 15 to 20

64-17-5 Ethanol 15 to 20

8030-30-6 Naphtha 15 to 20

75-01-4 Ethene, chloro- 15 to 20

64741-86-2 Distillates (petroleum), sweetened middle 10 to 15

68527-19-5 Hydrocarbons, C1-4, debutanizer fraction 10 to 15

68527-27-5 Naphtha (petroleum), full-range alkylate, butane-contg. 10 to 15

68783-12-0 Naphtha (petroleum), unsweetened 10 to 15

1634-04-4 Propane, 2-methoxy-2-methyl- 10 to 15 

### Exhibit A2. (continued)