Regulations last checked for updates: Nov 22, 2024

Title 40 - Protection of Environment last revised: Nov 20, 2024
Appendix - Table 5 to Subpart PPPP of Part 63—List of HAP 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
[85 FR 41160, July 8, 2020]
authority: 42 U.S.C. 7401
source: 57 FR 61992, Dec. 29, 1992, unless otherwise noted.