United States Office of Pollution June 1999
Environmental Protection Prevention and Toxics EPA 745-B-99-013
Agency Washington, DC 20460
EMERGENCY PLANNING AND
COMMUNITY RIGHT-TO-KNOW
SECTION 313
List of Toxic Chemicals within the
Chlorophenols Category
Section 313 of the Emergency Planning and Community Right-to-Know Act (EPCRA)
requires certain facilities manufacturing, processing, or otherwise using listed toxic chemicals to report
their environmental releases of such chemicals annually. Beginning with the 1991 reporting year, such
facilities also must report pollution prevention and recycling data for such chemicals, pursuant to section
6607 of the Pollution Prevention Act, 42 U.S.C. 13106. When enacted, section 313 established an
initial list of toxic chemicals that was comprised of more than 300 chemicals and 20 chemical
categories. Section 313(d) authorizes EPA to add chemicals to, or delete chemicals from, the list and
sets forth criteria for these actions.
CONTENTS
Section 1. Introduction 2
Section 2. CAS Number List of Chemicals within the Chlorophenois Category 5
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Section 1. Introduction
EPCRA section 313 requires threshold determinations for chemical categories to be based on
the total of all chemicals in the category manufactured, processed, or otherwise used. For example, a
facility that manufactures three members of a chemical category would count the total amount of all
three chemicals manufactured towards the manufacturing threshold for that category. When filing
reports for chemical categories, the releases are determined in the same manner as the thresholds. One
report is filed for the category and all releases are reported on this form.
EPA is providing a following list of chemical names and Chemical Abstract Service (CAS)
numbers to aid the regulated community in determining whether they need to report the chlorophenols
category. Although this list covers all members of the category (except those that are individually
listed), there may be CAS numbers, not included in this list, that represent mixtures of chlorophenols or
mixtures of chlorophenols and other chemicals. If a facility is manufacturing, processing, or using a
chemical which meets the chlorophenol definition, they must report under EPCRA section 313, even if
the CAS number does not appear on the following list.
Who Must Report
A plant, factory, or other facility is subject to the provisions of section 313, if it
meets all three of the following criteria:
• It is included in a covered Standard Industrial Classification (SIC) code as listed in the
following table; and
Industrial Sector SIC code
Manufacturing
Metal mining
Coal Mining
Electrical utilities
Treatment, Storage, and Disposal facilities
Solvent recovery services
Chemical distributors
Petroleum bulk terminals
20-39
10 (except 1011, 1081, and 1094)
12 (except 1241)
491 1 , 493 1 , and 4939, limited to facilities that combust coal
and/or oil for the purpose of generating electricity for
distribution in commerce
4953, limited to RCRA Subtitle C permitted or interim status
facilities
7389, limited to facilities primarily engaged in solvent recovery
services on a contract or fee basis
5169
5171
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It has 10 or more full-time employees (or the equivalent 20,000 hours per year); and
It manufactures, imports, processes, or otherwise uses any of the toxic chemicals listed
on the EPCRA section 313 list in amounts greater than the "threshold" quantities
specified below.
Thresholds
Thresholds are specified amounts of toxic chemicals used during the calendar year that trigger
reporting requirements.
If you manufacture or import any of the listed toxic chemicals, the threshold quantity will be:
25,000 pounds per toxic chemical or category over the calendar year.
If you process any of the listed toxic chemicals, the threshold quantity will be:
• 25,000 pounds per toxic chemical or category over the calendar year.
If you otherwise use any of the listed toxic chemicals (without incorporating it into any product
or producing it at the facility), the threshold quantity is:
• 10,000 pounds per toxic chemical or category over the calendar year.
Chlorophenols Category Definition
The chlorophenols category is defined by the following structure:
OH
. -.
Where x = 1 to 5
Chemicals that meet this category definition are reportable.
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Individually Listed Chlorophenols
There are four chemicals, 2,4-dichlorophenol (CAS number 120-83-2), 2,4,5-
trichlorophenol (CAS number 95-95-4), 2,4,6-trichlorophenol (CAS number 88-06-2), and
pentachlorophenol (CAS number 87-86-5) that are on the individual list and the CAS number list (40
CFR 372.65(a) and (b)). Threshold determinations should be made for each of these chemicals
individually and separately from the chlorophenols category.
De Minimis Concentrations
The chlorophenols category is subject, to the 0.1 percent de minimis concentration. Thus,
mixtures that contain members of this category at concentrations equal to or in excess of 0.1 percent
should be factored in threshold and release determinations.
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Section 2. Chlorophenols included in the EPCRA Section 313 Chlorophenols Category
EPA is providing the following list of chemical names and Chemical Abstract Service (CAS)
numbers to aid the regulated community in determining whether they need to report the chlorophenots
category. Although this list covers all members of the category (except those that are individually listed
which are identified below), there may be CAS numbers, not included in this list, that represent mixtures
of Chlorophenols or mixtures of Chlorophenols and other chemicals. If a facility is manufacturing,
processing, or using a chemical which meets the chlorophenol definition, they must report under
EPCRA section 313, even if the CAS number does not appear on the following list.
Chlorophenols Included in the EPCRA Section 313
Chlorolphenols Category
Chlorophenols may be named using either numbers or letters (o, m, p), where:
ortho (o) = 2
meta (m) = 3
para (p) = 4
Example: 2-chlorophenol = o-chlorophenol
NAME CAS NUMBER
MONOCHLOROPHENOL S
2-chlorophenol 95-57-8
3-chlorophenol 108-43-0
4-chloroplienol 106-48-9
3-(or 2) -chlorophenol 29353-84-2
chlorophenol 25167-80-0
DICHLOROPHENOLS
2,3-dichlorophenol 576-24-9
2,5-dichlorophenol 593-78-8
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2,6,-dichlorophenol
87-65-0
3,4, -dichlorophenol
3,5, -dichlorophenol
2,3, (or 3,4)-dichlorophenol
dichlorophenol
TRICHLOROPHENOLS
2,3,4,-trichlorophenol
2,3,5,-trichlorophenol
2,3,6,-trichlorophcnol
3,4,5-trichlorophenol
2,3,5-(2,3,6 or 2,4,5)-trichlorophenol
2,4,7-trichlorophenol1
trichlorophenol
TETRACHLOROPMENOLS
2,3,4,5-tetrachlorophenol
2,3,4,6-tetrachlorophenol
2,3,5,6-tetrachlorophenol
2,4,7,7-tetrachlorophenol1
tetrachlorophenol
95-77-2
591-35-5
83700-00-9
25167-81-1
15950-66-0
933-78-8
933-75-4
609-19-8
119692-99-8
95719-03-2
25167-82-2
4901-51-3
935-95-5
58-90-2
195719-04-3
25167-83-3
*? means that the position of the chlorine is unspecified.
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