List of 189 Hazardous Air Pollutants

Note: This list is based on the Federal EPA list; each state has its own list of HAPs.

Chemical Name

Acetaldehyde

Chlorobenzilate

Acetamide

Chloroform

Acetonitrile

Chloromethyl methyl ether

Acetophenone

Chloroprene

2-Acetylaminofluorene

Cresols/Cresylic acid (isomers and mixture)

Acrolein

0-Cresol

Acrylamide

m-Cresol

Acrylic acid

p-Cresol

Acrylonitrile

Cumene

Allyl chloride

2,4-D, salts and esters

4-Aminobiphenyl

DDE

Aniline

Diazomethane

o-Anisidine

Dibenzofurans

Asbestos

1,2-Dibromo-3-chloropropane

Benzene (including from gasoline)

Dibutylphthalate

Benzidine

1,4-Dichlorobenzene(p)

Benzotrichloride

3,3′-Dichlorobenzidene

Benzyl chloride

Dichloroethyl ether (Bis(2chloroethyl)ether)

Biphenyl

1,3-Dichloropropene

Bis (2-ethylhexyl) phthalate (DEHP)

Dichlorvos

Bis(chloromethyl) ether

Diethanolamine

Bromoform

N,N-Diethyl aniline (N,N-Dimethylaniline)

1,3-Butadiene

Diethyl sulfate

Calcium cyanamide

3,3-Dimethoxybenzidine

Caprolactam

Dimethyl aminoazobenzene

Captan

3,3-Dimethylbenzidine

Carbaryl

Dimethyl carbamoyl chloride

Carbon disulfide

Dimethyl formamide

Carbon tetrachloride

1,1 Dimethylhydrazine

Carbonyl sulfide

Dimethyl phthalate

Catechol

Dimethyl sulfate

Chloramben

4,6-Dinitro-o-cresol, and salts

Chlordane

2,4-Dinitrophenol

Chlorine

2,4-Dinitrotoluene

Chloroacetic acid

1,4-Dioxane (1,4-Diethyleneoxide)

2-Chloroacetophenone

1,2-Diphenylhydrazine

Chlorobenzene

Epichlorohydrin (l-Chloro-2,3-epoxypropane)

1,2-Epoxybutane

Methyl tert butyl ether

Ethyl acrylate

4,4-Methylene bis (2-chloroaniline)

Ethyl benzene

Methylene chloride (Dichloromethane)

Ethyl carbamate (Urethane)

Methylene diphenyl diisocyanate (MDI)

Ethyl chloride (Chloroethane)

4,4′-Methylenedianiline

Ethyl enedibromide (Dibromoethane)

Naphthalene

Ethyl enedichloride (1,2-Dichloroethane)

Nitrobenzene

Ethylene glycol

4-Nitrobiphenyl

Ethyleneimine (Aziridine)

4-Nitrophenol

Ethylene oxide

2-Nitropropane

Ethylene thiourea

N-Nitroso-N-methylurea

Ethylidene dichloride (1,1-Dichloroethane)

N-Nitrosodimethylamine

Formaldehyde

N-Nitrosomorpholine

Heptachlor

Parathion

Hexachlorobenzene

Pentachloronitrobenzene (Quintobenzene)

Hexachlorobutadiene

Pentachlorophenol

Hexachlorocyclopentadiene

Phenol

Hexachloroethane

p-Phenylenediamine

Hexamethylene-1,6-diisocyanate

Phosgene

Hexamethylphosphoramide

Phosphine

Hexane

Phosphorus

Hydrazine

Phthalic anhydride

Hydrochloric acid

Polychlorinated biphenyls (Aroclors)

Hydrogen fluoride (Hydrofluoric acid)

1,3-Propane sultone

Hydroquinone

beta-Propiolactone

Isophorone

Propionaldehyde

Lindane (all isomers)

Propoxur (Baygon)

Maleic anhydride

Propylene dichloride (1,2-Dichloropropane)

Methanol

Propylene oxide

Methoxychlor

1,2-Propylenimine (2-Methyl aziridine)

Methyl bromide (Bromomethane)

Quinoline

Methyl chloride (Chloromethane)

Quinone

Methyl chloroform (1,1,1-Trichloroethane)

Styrene

Methyl ethyl ketone (2-Butanone)

Styrene oxide

Methyl hydrazine

2,3,7,8-Tetrachlorodibenzo-p-dioxin

Methyl iodide (Iodomethane)

1,1,2,2-Tetrachloroethane

Methyl isobutyl ketone (Hexone)

Tetrachloroethylene (Perchloroethylene)

Methyl isocyanate

Titanium tetrachloride

Methyl methacrylate

Toluene

2,4-Toluene diamine

2,4-Toluene diisocyanate

o-Toluidine

Antimony compounds

Toxaphene (chlorinated camphene)

Arsenic compounds (inorganic, including arsine)

1,2,4-Trichlorobenzene

Beryllium compounds

1,1,2-Trichloroethane

Cadmium compounds

Trichloroethylene

Chromium compounds

2,4,5-Trichlorophenol

Cobalt compounds

2,4,6-Trichlorophenol

Coke oven emissions

Triethylamine

Cyanide compounds

Trifluralin

Glycol ethers

2,2,4-Trimethylpentane

Lead compounds

Vinyl acetate

Manganese compounds

Vinyl bromide

Mercury compounds

Vinyl chloride

Mineral fibers

Vinylidene chloride (1,1-Dichloroethylene)

Nickel compounds

Xylenes (isomers and mixture)

Polycyclic organic matter

o-Xylenes

Radionuclides (including radon)

m-Xylenes

Selenium compounds

p-Xylenes