United States Office of Pollution November 1994
Environmental Protection Prevention and Toxics EPA 745-B-95-004
Agency Washington, DC 20460
EMERGENCY PLANNING AND
COMMUNITY MGHT-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 Chlorophenols Category ... 4
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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 ceitegory. 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 conducts manufacturing operations (is included in Standard Industrial
Classification (SIC) codes 2 through 39); and
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.
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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:
Where x = 1 to 5
OH
Cl
x
H
(5-x)
Chemicals that meet this category definition are reportable.
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 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 Chlorophenols category. Although this list covers all members of the category
(except those that aire 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
Chlorophenols 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
MONOCHLOROPHENOLS
2-Chlorophenol
3-chlorophenol
4-chlorophenol
3-(or 2) -chlorophenol
chlorophenol
DICHLOROPHENQLS
2,3-dichlorophenol
2,5-dichlorophenol
2,6,-dichlorophenol
CAS NUMBER
95-57-8
108-43-0
106-48-9
29353-84-2
25167-80-0
576-24-9
583-78-8
87-65-0
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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,-trichlorophenol
3,4,5 -trichlorophenol
2,3,5-(2,3,6 or 2,4,5)-trichlorophenol
2,4, ?-trichloropheno I!
trichlorophenol
TETRACHLOROPHENOLS
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
95719-04-3
25167-83-3
? means that the position of the chlorine is unspecified.
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