SECTION 112 HAZARDOUS AIR POLLUTANTS

"This draft list includes current EPA staff recommendations for technical corrections and clarifications of the hazardous air pollutants (HAP) list in Section 112(b)(1) of the Clean Air Act. This draft has been distributed to apprise interested parties of potential future changes in the HAP list and is informational only. The recommended revisions of the current HAP list which are included in this draft do not themselves change the list as adopted by Congress and have no legal effect. EPA intends to propose specific revisions of the HAP list, including any technical corrections or clarifications of the list, only through notice and comment rulemaking."


Chemical
Abstract
Service
Number            Pollutant
75-07-0            Acetaldehyde
60-35-5            Acetamide
75-05-8            Acetonitrile
98-86-2            Acetophenone
53-96-3             2-Acetylaminofluorene
107-02-8        Acrolein
79-06-1            Acrylamide
79-10-7            Acrylic acid
107-13-1        Acrylonitrile
107-05-1        Allyl chloride
92-67-1            4-Aminobiphenyl
62-53-3            Aniline
90-04-0            o-Anisidine
1332-21-4        Asbestos
71-43-2            Benzene (including benzene from gasoline
92-87-5            Benzidine
98-07-7            Benzotrichloride
100-44-7        Benzyl chloride
92-52-4            Biphenyl
117-81-7        Bis(2-ethylhexyl)phthalate (DEHP)
542-88-1        Bis(chloromethyl) ether
75-25-2            Bromoform
106-99-0        1,3-Butadiene
156-62-7        Calcium cyanamide
105-60-2        Caprolactam (Removed 6/18/96, 61FR30816)
133-06-2        Captan
63-25-2            Carbaryl
75-15-0            Carbon disulfide
56-23-5            Carbon tetrachloride
463-58-1        Carbonyl sulfide
120-80-9        Catechol
133-90-4        Chloramben
57-74-9            Chlordane
7782-50-5        Chlorine
79-11-8            Chloroacetic acid
532-27-4        2-Chloroacetophenone
108-90-7        Chlorobenzene
510-15-6        Chlorobenzilate
67-66-3            Chloroform
107-30-2        Chloromethyl methyl ether
126-99-8        Chloroprene
1319-77-3        Cresol/Cresylic acid (mixed isomers)
95-48-7            o-Cresol
108-39-4        m-Cresol
106-44-5        p-Cresol
98-82-8            Cumene
N/A                 2,4-D (2,4-Dichlorophenoxyacetic Acid) (including salts and esters)
72-55-9            DDE (1,1-dichloro-2,2-bis(p-chlorophenyl) ethylene)
334-88-3        Diazomethane
132-64-9        Dibenzofuran
96-12-8             1,2-Dibromo-3-chloropropane
84-74-2            Dibutyl phthalate
106-46-7        1,4-Dichlorobenzene
91-94-1             3,3'-Dichlorobenzidine
111-44-4        Dichloroethyl ether (Bis[2-chloroethyl]ether)
542-75-6        1,3-Dichloropropene
62-73-7            Dichlorvos
111-42-2        Diethanolamine
64-67-5            Diethyl sulfate
119-90-4        3,3'-Dimethoxybenzidine
60-11-7             4-Dimethylaminoazobenzene
121-69-7        N,N-Dimethylaniline
119-93-7        3,3'-Dimethylbenzidine
79-44-7             Dimethylcarbamoyl chloride
68-12-2             N,N-Dimethylformamide
57-14-7             1,1-Dimethylhydrazine
131-11-3        Dimethyl phthalate
77-78-1            Dimethyl sulfate
N/A                 4,6-Dinitro-o-cresol (including salts)
51-28-5             2,4-Dinitrophenol
121-14-2        2,4-Dinitrotoluene
123-91-1        1,4-Dioxane (1,4-Diethyleneoxide)
122-66-7        1,2-Diphenylhydrazine
106-89-8        Epichlorohydrin (l-Chloro-2,3-epoxypropane)
106-88-7        1,2-Epoxybutane
140-88-5        Ethyl acrylate
100-41-4        Ethylbenzene
51-79-6            Ethyl carbamate (Urethane)
75-00-3            Ethyl chloride (Chloroethane)
106-93-4        Ethylene dibromide (Dibromoethane)
107-06-2        Ethylene dichloride (1,2-Dichloroethane)
107-21-1        Ethylene glycol
151-56-4        Ethyleneimine (Aziridine)
75-21-8            Ethylene oxide
96-45-7            Ethylene thiourea
75-34-3            Ethylidene dichloride (1,1-Dichloroethane)
50-00-0            Formaldehyde
76-44-8            Heptachlor
118-74-1        Hexachlorobenzene
87-68-3             Hexachlorobutadiene
N/A                 1,2,3,4,5,6-Hexachlorocyclyhexane (all stereo isomers, including lindane)
77-47-4             Hexachlorocyclopentadiene
67-72-1            Hexachloroethane
822-06-0        Hexamethylene diisocyanate
680-31-9        Hexamethylphosphoramide
110-54-3        Hexane
302-01-2        Hydrazine
7647-01-0        Hydrochloric acid (Hydrogen chloride [gas only])
7664-39-3        Hydrogen fluoride (Hydrofluoric acid)
123-31-9        Hydroquinone
78-59-1            Isophorone
108-31-6        Maleic anhydride
67-56-1            Methanol
72-43-5            Methoxychlor
74-83-9            Methyl bromide (Bromomethane)
74-87-3            Methyl chloride (Chloromethane)
71-55-6            Methyl chloroform (1,1,1-Trichloroethane)
78-93-3            Methyl ethyl ketone (2-Butanone)
60-34-4            Methylhydrazine
74-88-4            Methyl iodide (Iodomethane)
108-10-1        Methyl isobutyl ketone (Hexone)
624-83-9        Methyl isocyanate
80-62-6            Methyl methacrylate
1634-04-4        Methyl tert-butyl ether
101-14-4        4,4'-Methylenebis(2-chloroaniline)
75-09-2            Methylene chloride (Dichloromethane)
101-68-8        4,4'-Methylenediphenyl diisocyanate (MDI)
101-77-9        4,4'-Methylenedianiline
91-20-3            Naphthalene
98-95-3            Nitrobenzene
92-93-3            4-Nitrobiphenyl
100-02-7        4-Nitrophenol
79-46-9            2-Nitropropane
684-93-5        N-Nitroso-N-methylurea
62-75-9             N-Nitrosodimethylamine
59-89-2             N-Nitrosomorpholine
56-38-2            Parathion
82-68-8             Pentachloronitrobenzene (Quintobenzene)
87-86-5             Pentachlorophenol
108-95-2        Phenol
106-50-3        p-Phenylenediamine
75-44-5            Phosgene
7803-51-2        Phosphine
N/A                 Phosphorus Compounds
85-44-9            Phthalic anhydride
1336-36-3        Polychlorinated biphenyls (Aroclors)
1120-71-4        1,3-Propane sultone
57-57-8             beta-Propiolactone
123-38-6        Propionaldehyde
114-26-1        Propoxur (Baygon)
78-87-5            Propylene dichloride (1,2-Dichloropropane)
75-56-9            Propylene oxide
75-55-8             1,2-Propylenimine (2-Methylaziridine)
91-22-5            Quinoline
106-51-4        Quinone (p-Benzoquinone)
100-42-5        Styrene
96-09-3            Styrene Oxide
1746-01-6        2,3,7,8-Tetrachlorodibenzo-p-dioxin
79-34-5             1,1,2,2-Tetrachloroethane
127-18-4        Tetrachloroethylene (Perchloroethylene)
7550-45-0        Titanium tetrachloride
108-88-3        Toluene
95-80-7             Toluene-2,4-diamine
584-84-9        2,4-Toluene diisocyanate
95-53-4            o-Toluidine
8001-35-2        Toxaphene (chlorinated camphene)
120-82-1        1,2,4-Trichlorobenzene
79-00-5             1,1,2-Trichloroethane
79-01-6             Trichloroethylene
95-95-4             2,4,5-Trichlorophenol
88-06-2             2,4,6-Trichlorophenol
121-44-8        Triethylamine
1582-09-8        Trifluralin
540-84-1        2,2,4-Trimethylpentane
108-05-4        Vinyl acetate
593-60-2        Vinyl bromide
75-01-4            Vinyl chloride
75-35-4            Vinylidene chloride (1,1-Dichloroethylene)
1330-20-7        Xylenes (mixed isomers)
95-47-6            o-Xylene
108-38-3        m-Xylene
106-42-3        p-Xylene


Antimony Compounds
Arsenic Compounds (inorganic including arsine)
Beryllium Compounds
Cadmium Compounds
Chromium Compounds
Cobalt Compounds
Coke Oven Emissions
Cyanide Compounds1
Glycol ethers2
Lead Compounds
Manganese Compounds
Mercury Compounds
Fine mineral fibers3
Nickel Compounds
Polycyclic Organic Matter4
Radionuclides (including radon)5
Selenium Compounds


NOTE: For all listings above which contain the word "compounds" and for glycol ethers, the following applies: Unless otherwise specified, these listings are defined as including any unique chemical substance that contains the named chemical (i.e., antimony, arsenic, etc.) as part of that chemical's infrastructure.

1 X'CN
    where X = H' or any other group where a formal dissociation may occur. For example, KCN or Ca(CN)2.

2 (Under review)
Glycol Ether definition draft options:

Possible Correction to CAA 112(b)(1) footnote that would be consistant with OPPTS modified definition.

New OPPTS definition as published is:

R - (OCH2CH2)n - OR' where:

n = 1,2, or 3
R = alkyl C7 or less
or R = phenyl or alkyl substituted phenyl
OR' = H or alkyl C7 or less
or OR'= carboxylic acid ester, sulfate, phosphate, nitrate or sulfonate


CAA Glycol ether definition exactly as in the statute (errors included):

"Includes mono- and di ethers of of ethylene glycol, diethylene glycol, and triethylene glycol R - (OCH2CH2)n-OR'

where
n = 1,2, or 3
R = alkyl or aryl groups
R' = R,H or groups which, when removed, yield glycol ethers with the structure R-(OCH2CH)n-OH. Polymers are excluded from the glycol category.

CAA Glycol ether definition with technical correction made. (A 2 was left out of the last formula)

"Includes mono- and di- ethers of ethylene glycol, diethylene glycol, and triethylene glycol R-(OCH2CH2)n -OR'

where
n = 1, 2, or 3
R = alkyl or aryl groups
R' = R, H, or groups which, when removed, yield glycol ethers with the structure:      R-(OCH2CH2)n-OH. Polymers are excluded from the glycol category.


3 (Under Review)

4 (Under Review)

5 A type of atom which spontaneously undergoes radioactive decay.

Separate Source Category:

Under Section 112(c)(7) of the CAAA , Congress directed EPA to consider regulating research facilities as a separate source category.

hyperlink or bookmark:

CLEAN AIR ACT

TITLE I--AIR POLLUTION PREVENTION AND CONTROL

Part A--Air Quality and Emission Limitations

Sec. 112. Hazardous air pollutants.

(c) List of Source Categories.--

(7) RESEARCH FACILITIES.--The Administrator shall establish a separate category covering research or laboratory facilities, as necessary to assure the equitable treatment of such facilities. For purposes of this section, "research or laboratory facility" means any stationary source whose primary purpose is to conduct research and development into new processes and products, where such source is operated under the close supervision of technically trained personnel and is not engaged in the manufacture of products for commercial sale in commerce, except in a de minimis manner.

To close this document and return to where you called this reference, press the "Close" button.