Regulations last checked for updates: May 15, 2024

Title 40 - Protection of Environment last revised: May 13, 2024
All TitlesTitle 40Chapter IPart 63Subpart RRRRAppendix - Table 5 to Subpart RRRR of Part 63—List of Hazardous Air Pollutants That Must Be Counted Toward Total Organic HAP Content if Present at 0.1 Percent or More by Mass
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Appendix - Table 5 to Subpart RRRR of Part 63—List of Hazardous Air Pollutants That Must Be Counted Toward Total Organic HAP Content if Present at 0.1 Percent or More by Mass
Chemical name CAS No.
1,1,2,2-Tetrachloroethane79-34-5
1,1,2-Trichloroethane79-00-5
1,1-Dimethylhydrazine57-14-7
1,2-Dibromo-3-chloropropane96-12-8
1,2-Diphenylhydrazine122-66-7
1,3-Butadiene106-99-0
1,3-Dichloropropene542-75-6
1,4-Dioxane123-91-1
2,4,6-Trichlorophenol88-06-2
2,4/2,6-Dinitrotoluene (mixture)25321-14-6
2,4-Dinitrotoluene121-14-2
2,4-Toluene diamine95-80-7
2-Nitropropane79-46-9
3,3'-Dichlorobenzidine91-94-1
3,3'-Dimethoxybenzidine119-90-4
3,3'-Dimethylbenzidine119-93-7
4,4'-Methylene bis(2-chloroaniline)101-14-4
Acetaldehyde75-07-0
Acrylamide79-06-1
Acrylonitrile107-13-1
Allyl chloride107-05-1
alpha-Hexachlorocyclohexane (a-HCH)319-84-6
Aniline62-53-3
Benzene71-43-2
Benzidine92-87-5
Benzotrichloride98-07-7
Benzyl chloride100-44-7
beta-Hexachlorocyclohexane (b-HCH)319-85-7
Bis(2-ethylhexyl)phthalate117-81-7
Bis(chloromethyl)ether542-88-1
Bromoform75-25-2
Captan133-06-2
Carbon tetrachloride56-23-5
Chlordane57-74-9
Chlorobenzilate510-15-6
Chloroform67-66-3
Chloroprene126-99-8
Cresols (mixed)1319-77-3
DDE3547-04-4
Dichloroethyl ether111-44-4
Dichlorvos62-73-7
Epichlorohydrin106-89-8
Ethyl acrylate140-88-5
Ethylene dibromide106-93-4
Ethylene dichloride107-06-2
Ethylene oxide75-21-8
Ethylene thiourea96-45-7
Ethylidene dichloride (1,1-Dichloroethane)75-34-3
Formaldehyde50-00-0
Heptachlor76-44-8
Hexachlorobenzene118-74-1
Hexachlorobutadiene87-68-3
Hexachloroethane67-72-1
Hydrazine302-01-2
Isophorone78-59-1
Lindane (hexachlorocyclohexane, all isomers)58-89-9
m-Cresol108-39-4
Methylene chloride75-09-2
Naphthalene91-20-3
Nitrobenzene98-95-3
Nitrosodimethylamine62-75-9
o-Cresol95-48-7
o-Toluidine95-53-4
Parathion56-38-2
p-Cresol106-44-5
p-Dichlorobenzene106-46-7
Pentachloronitrobenzene82-68-8
Pentachlorophenol87-86-5
Propoxur114-26-1
Propylene dichloride78-87-5
Propylene oxide75-56-9
Quinoline91-22-5
Tetrachloroethene127-18-4
Toxaphene8001-35-2
Trichloroethylene79-01-6
Trifluralin1582-09-8
Vinyl bromide593-60-2
Vinyl chloride75-01-4
Vinylidene chloride75-35-4
[84 FR 9645, Mar. 15, 2019]
authority: 42 U.S.C. 7401
source: 57 FR 61992, Dec. 29, 1992, unless otherwise noted.
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