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) Inventory 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 Inventory Update Reporting (IUR) rule. Manufacturers and importers1 provided information 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 

data2. 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-confidential 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 collected 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 collection.

In 2006, a total of 3,827 sites3, representing 1,541 

companies, reported information on 6,200 chemicals. 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 “manufacturer” 

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 processed in the United States. In 1977, EPA promulgated 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 manufactured, 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 visit 

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, production 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 information and improving the utility of the information reported. Under the amended IUR requirements, 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 manufacturer 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 substances, the 2003 amendments expanded the collection 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 requirements. 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 reporting 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 manufacture TSCA Inventory-listed chemicals in quantities 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 reporting requirements. A submission typically contains 

reports for multiple chemicals.

EPA required all reporting sites to submit the following manufacturing information for each reportable chemical substance: 

•	 Parent company and site identification

•	 Specific chemical name

•	 Chemical Abstracts Service (CAS) Registry Number (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 chemical 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 threshold, then they were required to submit information 

on industrial processing and use and on commercial 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 industrial processing or use activity 

– Number of workers reasonably likely to be exposed to the chemical substance during each 

processing or use activity

– Percent of the total production volume associated with each processing or use activity 

Commercial and consumer use information includes 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 associated 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 available 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.asp
6 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 summary 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 significant errors on a substantial number of reporting 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 submitted 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 chemical 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 information. 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-confidential data. 

Manufacturing, processing, and use data, compiled 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 company name. The resulting searches provide chemical-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 submission 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 company 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 manufacturing, 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 Production Volume (HPV) Challenge Program6 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 information, technical understanding, best practices, and 

risk management approaches. In addition, the 

countries coordinate research on new approaches 

to chemical testing and assessment. This partnership, launched in August 2007, commits the three 

countries to accelerating and improving the effectiveness of actions to safeguard human health and 

the environment, providing cost-effective solutions 

for risk management for businesses and governments, 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 information 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 commitments 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 (especially children), the environment, and the general 

population. 

In 2008, as part of the SPP commitments, EPA 

began posting screening-level risk-based prioritization (RBP) documents on EPA’s Web site. The RBPs 

summarize basic hazard and exposure information 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 initial priority determination. In addition, EPA began 

developing initial evaluations of Moderate Production 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 commerce. 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, processing, and use of chemical substances.

•	 Supporting regulatory initiatives to require

testing and/or submission of information about 

selected chemical substances.

•	 Identifying manufacturers of chemical substances in the event of a need for rapid risk management response to a concern about a chemical 

substance.

•	 Assisting in the design and implementation of

cooperative programs with the chemical industry and the public such as the Voluntary Children’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 organizations, 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 associated 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 exposures 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 purposes. 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 starting point in prioritizing and screening chemicals 

for potential risks to humans and the environment. 

The public should also consider several characteristics of IUR information when using the data, as 

follows: 

•	 Confidential Business Information Claims—

IUR data can be designated as confidential business information (CBI) by the submitter. EPA 

has protected confidential information when aggregating 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 complete 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 information 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 information 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 applications (uses for which it is considered a chemical substance under TSCA) and food applications (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 Introduction). In general, manufacturers are not required 

to report IUR information for polymers, microorganisms, naturally occurring chemical substances, 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 foreign (if any), are less than $4 million regardless 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: Reporting 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 quantities 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 information7. However, 

manufacturers were required to report manufacturing information for these partially exempted 

substances. (See 40 CFR 710.46(b) for additional 

information.)

•	 Reporting in Ranges—The following data elements 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 number of industrial processing and use workers 

reasonably likely to be exposed to the chemical 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 developing 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 processing 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 substance 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 production 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 accounted 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 subject 

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 reported 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 imported 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 chemical 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 chemical 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 majority 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 data8, including confidential 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 Sites
14 2006 Inventory Update Reporting: Data Summary

Data Analysis and Key Findings

imported, or both domestically manufactured and 

imported. Exhibit 5 illustrates the relationship between the manufacturing and importing activities 

for both nationally aggregated chemical information 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 domestically manufactured, 63 percent were only domestically 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 imported 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 domestic 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 identified 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 industry in the United States.

Domestic

Manufacture

Import

Diagram is not to scale

Site-Limited

Chemicals* Reports**

Domestic Manufacture Only 3,038 16,696

Import Only 1,366 8,769

Domestic Manufacture and Import 1,796 558

Site-Limited 508 3,719

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 approximately 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 Region 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 domestically 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 accounting for approximately 5 percent of the total production 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

9 HI

Guam

Trust Terroritories

American Somoa

Northern Mariana Islands

Exhibit 6. EPA Regions

0

2000

4000

6000

8000

10000

12000

14000

16000

1 2 3456 7 8 9 10

EPA Region

Production Volume (billion pounds)

0

500

1000

1500

2000

2500

3000

3500

Number of chemicals

Imported Production Volume

Manufactured Production Volume

Number of Chemicals

Exhibit 7. Production Volumes and the 

Number of Chemicals Reported by 

Each EPA Region 
16 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 manufactured in each state. Approximately half of the states 

had 50 or more sites reporting 2006 IUR information. Exhibit 9 illustrates the total reported production 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 production 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 Reporting Sites

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 State
17 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

Production Volume Ranges

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

State

Total Production Volume 

(billion lbs)

0

5,00

1,000

1,500

2,000

Number of Chemicals

Total Production Volume Reported Chemicals

Exhibit 10. The Top 10 States by 

Production Volume and the Number of 

Chemicals They Report
18 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 generation 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 confidential. 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 information is available for all non-confidential chemicals 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 chemicals based on the total production volume excluding 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 population 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 exposures 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 trillion pounds reported. 

Exhibits 13 and 14 provide background information 

for two different chemical manufacturing scenarios—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 VolumeRange (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 (Ca3O(SiO4)) 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 (H4SiO4), 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 Volume
20 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 VolumeRange (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 (Ca3O(SiO4)) 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 (H4SiO4), 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
21 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 oxide
22 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 (SiO2) (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 Air Precipitator

To stack

Fly Ash (Recovery or Disposal)

Bottom Ash (Disposal or Reuse)

Ash

Hoppers

Flame
23 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 concentration 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. Submitters 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 exposures 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 concentration in a mixture are factors in the assessment 

of exposure of workers to that chemical. Exhibit 

16 illustrates that most chemicals were manufactured at relatively high concentrations, i.e. 90 

percent or greater by weight. Exhibit 17 shows the 

number of chemicals reported for each physical 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 Workers 

Number 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 Concentration

Number of Times Reported

Import Manufacture Both

Exhibit 16. Number of Times 

Submitters Reported a Particular 

Range of Maximum Concentration
24 2006 Inventory Update Reporting: Data Summary

Data Analysis and Key Findings

Industrial Processing and Use Data

For the first time, the 2006 IUR required submitters 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, manufacturers 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 following:

•	 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 adsorbents, 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 priority-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 sectors 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 manufacturing 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

Liquid

Number of Chemicals

0

50,000

100,000

150,000

200,000

250,000

300,000

350,000

Associated Production Volume (billion lbs) 

Total Production Volume

Number of Chemicals

Exhibit 17. Number of Chemicals 

Reported for Each Physical Form and

the Associated Production Volumes
25 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 61
26 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 23
27 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 

Reported
28 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 summarizes the number of unique chemicals reported 

and the total times submitters reported each product category. Note that chemicals may be reported 

under multiple categories. For each product category 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 satisfies 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 children up to the age of 14? 

2. Does the manufacturer of the product state 

through product labeling or other written materials 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 questions, 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 products, 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 manufacturers and importers will be required to report 

information on their 2010 manufacturing, processing, and use activities. To minimize problems with 

the 2011 IUR data, increase the data’s usefulness, 

and prevent delays with the release of the associated 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, providing 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 Database
33 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 Internet 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 erroneous 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 proposed 2011 IUR regulatory changes.
34 2006 Inventory Update Reporting: Data Summary

Appendix

CAS Registry

Number Chemical Name Production VolumeRange (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 (Ca3O(SiO4)) 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 (H4SiO4), calcium salt (1:2) 85 to 90

Exhibit A1. Top 100 Chemicals Based on Total Reported Production Volume
35 2006 Inventory Update Reporting: Data Summary

Appendix

CAS Registry

Number Chemical Name Production VolumeRange (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 VolumeRange (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 (AlCa2FeO5) 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 (Al2O3) 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 (Al2Ca3O6) 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 VolumeRange (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 (Fe2O3) 15 to 20

1310-73-2 Sodium hydroxide (Na(OH)) 15 to 20
38 2006 Inventory Update Reporting: Data Summary

Appendix

CAS Registry

Number Chemical Name Production VolumeRange (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 (Ca3O(SiO4)) 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 (H4SiO4), 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 VolumeRange (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 (AlCa2FeO5) 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 (Al2O3) 35 to 40

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

7664-41-7 Ammonia 30 to 35
40 2006 Inventory Update Reporting: Data Summary

Appendix

CAS Registry

Number Chemical Name Production VolumeRange (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 (Al2Ca3O6) 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 VolumeRange (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 (Fe2O3) 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)