1. Regulations
  2. title 40
  3. chapter I-i10
  4. part 63
  5. subpart F
  6. appendix-i 3

- Table 4 to Subpart F of Part 63—Organic Hazardous Air Pollutants Subject to Cooling Tower Monitoring Requirements in § 63.104

Chemical name CAS
Number a		Acetaldehyde75070 Acetonitrile75058 Acetophenone98862 Acrolein107028 Acrylonitrile107131 Allyl chloride107051 Aniline62533 Anisidine (o-)90040 Benzene71432 Benzyl chloride100447 Biphenyl92524 Bromoform75252 Butadiene (1,3-)106990 Carbon disulfide75150 Carbon tetrachloride56235 Chloroacetophenone (2-)532274 Chlorobenzene108907 2-Chloro-1,3-butadiene (Chloroprene)126998 Chloroform67663 Cresol and cresylic acid (o-)95487 Cresol and cresylic acid (m-)108394 Cresol and cresylic acid (p-)106445 Cumene98828 Dichlorobenzene (p-)106467 Dichlorobenzidine (3,3″-)91941 Dichloroethane (1,2-) (Ethylene dichloride) (EDC)107062 Dichloroethyl ether (Bis(2-chloroethyl)ether)111444 Dichloropropene (1,3-)542756 Diethylene glycol diethyl ether112367 Diethylene glycol dimethyl ether111966 Diethyl sulfate64675 Dimethylaniline (N,N-)121697 Dimethylhydrazine (1,1-)57147 Dimethyl phthalate131113 Dimethyl sulfate77781 Dinitrophenol (2,4-)51285 Dinitrotoluene (2,4-)121142 Dioxane (1,4-) (1,4-Diethyleneoxide)123911 Epichlorohydrin (1-Chloro-2,3-epoxypropane)106898 Ethyl acrylate140885 Ethylbenzene100414 Ethyl chloride (Chloroethane)75003 Ethylene dibromide (Dibromoethane)106934 Ethylene glycol dimethyl ether110714 Ethylene glycol monobutyl ether acetate112072 Ethylene glycol monoethyl ether acetate111159 Ethylene glycol monoethyl ether110805 Ethylene glycol monomethyl ether109864 Ethylene glycol monomethyl ether acetate110496 Ethylene glycol monopropyl ether2807309 Ethylene oxide75218 Ethylidene dichloride (1,1-Dichloroethane)75343 Formaldehyde50000 Hexachlorobenzene118741 Hexachlorobutadiene87683 Hexachloroethane67721 Hexane110543 Isophorone78591 Methanol67561 Methyl bromide (Bromomethane)74839 Methyl chloride (Chloromethane)74873 Methyl hydrazine60344 Methyl isobutyl ketone (Hexone)108101 Methyl methacrylate80626 Methyl tert-butyl ether1634044 Methylene chloride (Dichloromethane)75092 Methylenedianiline (4,4″-)101779 Naphthalene91203 Nitrobenzene98953 Nitropropane (2-)79469 Phenol108952 Phenylenediamine (p-)106503 Phosgene75445 Propionaldehyde123386 Propylene dichloride (1,2-Dichloropropane)78875 Propylene oxide75569 Quinone106514 Styrene100425 Tetrachloroethane (1,1,2,2-)79345 Tetrachloroethylene (Perchloroethylene)127184 Toluene108883 Toluidine (o-)95534 Trichlorobenzene (1,2,4-)120821 Trichloroethane (1,1,1-) (Methyl chloroform)71556 Trichloroethane (1,1,2-) (Vinyl trichloride)79005 Trichloroethylene79016 Trichlorophenol (2,4,5-)95954 Triethylamine121448 Trimethylpentane (2,2,4-)540841 Vinyl acetate108054 Vinyl chloride (chloroethylene)75014 Vinylidene chloride (1,1-Dichloroethylene)75354 Xylene (m-)108383 Xylene (o-)95476 Xylene (p-)106423

a CAS Number = Chemical Abstract Service number.

[62 FR 2740, Jan. 17, 1997, as amended at 71 FR 76614, Dec. 21, 2006; 89 FR 43175, May 16, 2024]

AUTHORITY: 42 U.S.C. 7401

SOURCE: 57 FR 61992, Dec. 29, 1992, unless otherwise noted.