{"data":{"id":"us/40-cfr-table-4-to-subpart-f-of-part-63","jurisdiction":"us","citation":"40 CFR Table 4 to Subpart F of Part 63","heading":"Table 4 to Subpart F of Part 63—Organic Hazardous Air Pollutants Subject to Cooling Tower Monitoring Requirements in § 63.104","body":"Chemical name CAS Number a\nAcetaldehyde 75070\nAcetonitrile 75058\nAcetophenone 98862\nAcrolein 107028\nAcrylonitrile 107131\nAllyl chloride 107051\nAniline 62533\nAnisidine (o-) 90040\nBenzene 71432\nBenzyl chloride 100447\nBiphenyl 92524\nBromoform 75252\nButadiene (1,3-) 106990\nCarbon disulfide 75150\nCarbon tetrachloride 56235\nChloroacetophenone (2-) 532274\nChlorobenzene 108907\n2-Chloro-1,3-butadiene (Chloroprene) 126998\nChloroform 67663\nCresol and cresylic acid (o-) 95487\nCresol and cresylic acid (m-) 108394\nCresol and cresylic acid (p-) 106445\nCumene 98828\nDichlorobenzene (p-) 106467\nDichlorobenzidine (3,3″-) 91941\nDichloroethane (1,2-) (Ethylene dichloride) (EDC) 107062\nDichloroethyl ether (Bis(2-chloroethyl)ether) 111444\nDichloropropene (1,3-) 542756\nDiethylene glycol diethyl ether 112367\nDiethylene glycol dimethyl ether 111966\nDiethyl sulfate 64675\nDimethylaniline (N,N-) 121697\nDimethylhydrazine (1,1-) 57147\nDimethyl phthalate 131113\nDimethyl sulfate 77781\nDinitrophenol (2,4-) 51285\nDinitrotoluene (2,4-) 121142\nDioxane (1,4-) (1,4-Diethyleneoxide) 123911\nEpichlorohydrin (1-Chloro-2,3-epoxypropane) 106898\nEthyl acrylate 140885\nEthylbenzene 100414\nEthyl chloride (Chloroethane) 75003\nEthylene dibromide (Dibromoethane) 106934\nEthylene glycol dimethyl ether 110714\nEthylene glycol monobutyl ether acetate 112072\nEthylene glycol monoethyl ether acetate 111159\nEthylene glycol monoethyl ether 110805\nEthylene glycol monomethyl ether 109864\nEthylene glycol monomethyl ether acetate 110496\nEthylene glycol monopropyl ether 2807309\nEthylene oxide 75218\nEthylidene dichloride (1,1-Dichloroethane) 75343\nFormaldehyde 50000\nHexachlorobenzene 118741\nHexachlorobutadiene 87683\nHexachloroethane 67721\nHexane 110543\nIsophorone 78591\nMethanol 67561\nMethyl bromide (Bromomethane) 74839\nMethyl chloride (Chloromethane) 74873\nMethyl hydrazine 60344\nMethyl isobutyl ketone (Hexone) 108101\nMethyl methacrylate 80626\nMethyl tert-butyl ether 1634044\nMethylene chloride (Dichloromethane) 75092\nMethylenedianiline (4,4″-) 101779\nNaphthalene 91203\nNitrobenzene 98953\nNitropropane (2-) 79469\nPhenol 108952\nPhenylenediamine (p-) 106503\nPhosgene 75445\nPropionaldehyde 123386\nPropylene dichloride (1,2-Dichloropropane) 78875\nPropylene oxide 75569\nQuinone 106514\nStyrene 100425\nTetrachloroethane (1,1,2,2-) 79345\nTetrachloroethylene (Perchloroethylene) 127184\nToluene 108883\nToluidine (o-) 95534\nTrichlorobenzene (1,2,4-) 120821\nTrichloroethane (1,1,1-) (Methyl chloroform) 71556\nTrichloroethane (1,1,2-) (Vinyl trichloride) 79005\nTrichloroethylene 79016\nTrichlorophenol (2,4,5-) 95954\nTriethylamine 121448\nTrimethylpentane (2,2,4-) 540841\nVinyl acetate 108054\nVinyl chloride (chloroethylene) 75014\nVinylidene chloride (1,1-Dichloroethylene) 75354\nXylene (m-) 108383\nXylene (o-) 95476\nXylene (p-) 106423\na CAS Number = Chemical Abstract Service number.","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER C—AIR PROGRAMS","PART 63—NATIONAL EMISSION STANDARDS FOR HAZARDOUS AIR POLLUTANTS FOR SOURCE CATEGORIES","Subpart F—National Emission Standards for Hazardous Air Pollutants From the Synthetic Organic Chemical Manufacturing Industry"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-40.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:04Z","sha256":"84afefe5c98dcaa1fcf93fc5c419299cf87886781bae58051ec410126536f08a","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-table-3-to-subpart-f-of-part-63","next":"us/40-cfr-63.110"},"notice":"GroundRules: Original legal text. Not legal advice."}