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C-1 APPENDIX C The Clean Air Act Amendments of 1990 List of Hazardous Air Pollutants CAS Number Chemical Name CAS Number Chemical Name 75070 Acetaldehyde 108907 Chlorobenzene 60355 Acetamide 510156 Chlorobenzilate 75058 Acetonitrile 67663 Chloroform 98862 Acetophenone 107302 Chloromethyl methyl ether 53963 2-Acetylaminofluorene 126998 Chloroprene 107028 Acrolein 1319773 Cresols/Cresylic acid (isomers and mixture) 79061 Acrylamide 95487 o-Cresol 79107 Acrylic acid 108394 m-Cresol 107131 Acrylonitrile 106445 p-Cresol 107051 Allyl chloride 98828 Cumene 92671 4-Aminobiphenyl 94757 2,4-D, salts and esters 62533 Aniline 3547044 DDE 90040 o-Anisidine 334883 Diazomethane 1332214 Asbestos 132649 Dibenzofurans 71432 Benzene (including benzene from gasoline) 96128 1,2-Dibromo-3-chloropropane 92875 Benzidine 84742 Dibutylphthalate 98077 Benzotrichloride 106467 1,4-Dichlorobenzene(p) 100447 Benzyl chloride 91941 3,3-Dichlorobenzidene 92524 Biphenyl 111444 Dichloroethyl ether (Bis(2-chloroethyl)ether) 117817 Bis(2-ethylhexyl)phthalate (DEHP) 542756 1,3-Dichloropropene 542881 Bis(chloromethyl)ether 62737 Dichlorvos 75252 Bromoform 111422 Diethanolamine 106990 1,3-Butadiene 121697 N,N-Diethyl aniline (N,N-Dimethylaniline) 156627 Calcium cyanamide 64675 Diethyl sulfate 105602 Caprolactam 119904 3,3-Dimethoxybenzidine 133062 Captan 60117 Dimethyl aminoazobenzene 63252 Carbaryl 119937 3,3'-Dimethyl benzidine 75150 Carbon disulfide 79447 Dimethyl carbamoyl chloride 56235 Carbon tetrachloride 68122 Dimethyl formamide 463581 Carbonyl sulfide 57147 1,1-Dimethyl hydrazine 120809 Catechol 131113 Dimethyl phthalate 133904 Chloramben 77781 Dimethyl sulfate 57749 Chlordane 534521 4,6-Dinitro-o-cresol, and salts 7782505 Chlorine 51285 2,4-Dinitrophenol 79118 Chloroacetic acid 121142 2,4-Dinitrotoluene 532274 2-Chloroacetophenone 123911 1,4-Dioxane (1,4-Diethyleneoxide)

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C-2 CAS Number Chemical Name CAS Number Chemical Name 122667 1,2-Diphenylhydrazine 100027 4-Nitrophenol 106898 Epichlorohydrin 79469 2-Nitropropane (l-Chloro-2,3-epoxypropane) 684935 N-Nitroso-N-methylurea 106887 1,2-Epoxybutane 62759 N-Nitrosodimethylamine 140885 Ethyl acrylate 59892 N-Nitrosomorpholine 100414 Ethyl benzene 56382 Parathion 51796 Ethyl carbamate (Urethane) 82688 Pentachloronitrobenzene (Quintobenzene) 75003 Ethyl chloride (Chloroethane) 87865 Pentachlorophenol 106934 Ethylene dibromide (Dibromoethane) 108952 Phenol 107062 Ethylene dichloride (1,2-Dichloroethane) 106503 p-Phenylenediamine 107211 Ethylene glycol 75445 Phosgene 151564 Ethylene imine (Aziridine) 7803512 Phosphine 75218 Ethylene oxide 7723140 Phosphorus 96457 Ethylene thiourea 85449 Phthalic anhydride 75343 Ethylidene dichloride (1,1-Dichloroethane) 1336363 Polychlorinated biphenyls (Aroclors) 50000 Formaldehyde 1120714 1,3-Propane sultone 76448 Heptachlor 57578 beta-Propiolactone 118741 Hexachlorobenzene 123386 Propionaldehyde 87683 Hexachlorobutadiene 114261 Propoxur (Baygon) 77474 Hexachlorocyclopentadiene 78875 Propylene dichloride (1,2-Dichloropropane) 67721 Hexachloroethane 75569 Propylene oxide 822060 Hexamethylene-1,6-diisocyanate 75558 1,2-Propylenimine (2-Methyl aziridine) 680319 Hexamethylphosphoramide 91225 Quinoline 110543 Hexane 106514 Quinone 302012 Hydrazine 100425 Styrene 7647010 Hydrochloric acid 96093 Styrene oxide 7664393 Hydrogen fluoride (Hydrofluoric acid) 1746016 2,3,7,8-Tetrachlorodibenzo-p-dioxin 7783064 Hydrogen sulfide 79345 1,1,2,2-Tetrachloroethane 123319 Hydroquinone 127184 Tetrachloroethylene (Perchloroethylene) 78591 Isophorone 7550450 Titanium tetrachloride 58899 Lindane (all isomers) 108883 Toluene 108316 Maleic anhydride 95807 2,4-Toluene diamine 67561 Methanol 584849 2,4-Toluene diisocyanate 72435 Methoxychlor 95534 o-Toluidine 74839 Methyl bromide (Bromomethane) 8001352 Toxaphene (chlorinated camphene) 74873 Methyl chloride (Chloromethane) 120821 1,2,4-Trichlorobenzene 71556 Methyl chloroform (1,1,1-Trichloroethane) 79005 1,1,2-Trichloroethane 78933 Methyl ethyl ketone (2-Butanone) 79016 Trichloroethylene 60344 Methyl hydrazine 95954 2,4,5-Trichlorophenol 74884 Methyl iodide (Iodomethane) 88062 2,4,6-Trichlorophenol 108101 Methyl isobutyl ketone (Hexone) 121448 Triethylamine 624839 Methyl isocyanate 1582098 Trifluralin 80626 Methyl methacrylate 540841 2,2,4-Trimethylpentane 1634044 Methyl tert butyl ether 108054 Vinyl acetate 101144 4,4-Methylene bis(2-chloroaniline) 593602 Vinyl bromide 75092 Methylene chloride (Dichloromethane) 75014 Vinyl chloride 101688 Methylene diphenyl diisocyanate (MDI) 75354 Vinylidene chloride (1,1-Dichloroethylene) 101779 4,4-Methylenedianiline 1330207 Xylenes (isomers and mixture) 91203 Naphthalene 95476 o-Xylenes 98953 Nitrobenzene 108383 m-Xylenes 92933 4-Nitrobiphenyl 106423 p-Xylenes

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C-3 CAS Number Chemical Name Source: www.epa.gov/ttn/atw/orig189.html. 0 Antimony Compounds NOTE: For all listings above that contain the word "compounds" and for glycol ethers, the following applies: Unless otherwise specified, these 0 Arsenic Compounds listings are defined as including any unique chemical substance that (inorganic including arsine) contains the named chemical (i.e., antimony, arsenic etc.) as part of 0 Beryllium Compounds that chemical's infrastructure. Includes mineral fiber emissions 0 Cadmium Compounds from facilities manufacturing or processing glass, rock, or slag fibers (or other mineral derived fibers) of average diameter 1 micrometer or 0 Chromium Compounds less. 0 Cobalt Compounds * X'CN where X = H' or any other group where a formal dissociation may 0 Coke Oven Emissions occur. For example KCN or Ca(CN)2. 0 Cyanide Compounds* ** Includes mono- and di- ethers of ethylene glycol, diethylene glycol, and 0 Glycol ethers** 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 0 Lead Compounds with the structure: R-(OCH2CH)n-OH. Polymers are excluded from the 0 Manganese Compounds glycol category. (See Modification.) 0 Mercury Compounds *** Includes mineral fiber emissions from facilities manufacturing or 0 Fine mineral fibers*** processing glass, rock, or slag fibers (or other mineral derived fibers) of average diameter 1 micrometer or less. 0 Nickel Compounds **** Includes organic compounds with more than one benzene ring, and 0 Polycylic Organic Matter**** which have a boiling point greater than or equal to 100 C. 0 Radionuclides (including radon)***** ***** A type of atom which spontaneously undergoes radioactive decay. 0 Selenium Compounds