40 CFR Part 63, Table 4
Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
| Chemical name | CAS No. |
|---|---|
| 4-Aminobiphenyl | 92671 |
| Styrene oxide | 96093 |
| Diethyl sulfate | 64675 |
| N-Nitrosomorpholine | 59892 |
| Dimethyl formamide | 68122 |
| Hexamethylphosphoramide | 680319 |
| Acetamide | 60355 |
| 4,4′-Methylenedianiline | 101779 |
| o-Anisidine | 90040 |
| 2,3,7,8-Tetrachlorodibenzo-p-dioxin | 1746016 |
Beryllium salts |
| Benzidine | 92875 |
|---|---|
| N-Nitroso-N-methylurea | 684935 |
| Bis (chloromethyl) ether | 542881 |
| Dimethyl carbamoyl chloride | 79447 |
Chromium compounds (hexavalent) |
| 1,2-Propylenimine (2-Methyl aziridine) | 75558 |
|---|---|
| Arsenic and inorganic arsenic compounds | 99999904 |
| Hydrazine | 302012 |
| 1,1-Dimethyl hydrazine | 57147 |
| Beryllium compounds | 7440417 |
| 1,2-Dibromo-3-chloropropane | 96128 |
| N-Nitrosodimethylamine | 62759 |
Cadmium compounds |
| Benzo (a) pyrene | 50328 |
|---|---|
| Polychlorinated biphenyls (Aroclors) | 1336363 |
| Heptachlor | 76448 |
| 3,3′-Dimethyl benzidine | 119937 |
| Nickel subsulfide | 12035722 |
| Acrylamide | 79061 |
| Hexachlorobenzene | 118741 |
| Chlordane | 57749 |
| 1,3-Propane sultone | 1120714 |
| 1,3-Butadiene | 106990 |
Nickel refinery dust |
| 2-Acetylaminoflourine | 53963 |
|---|---|
| 3,3′-Dichlorobenzidine | 53963 |
| Lindane (hexachlorcyclohexane, gamma) | 58899 |
| 2,4-Toluene diamine | 95807 |
| Dichloroethyl ether (Bis(2-chloroethyl) ether) | 111444 |
| 1,2-Diphenylhydrazine | 122667 |
| Toxaphene (chlorinated camphene) | 8001352 |
| 2,4-Dinitrotoluene | 121142 |
| 3,3′-Dimethoxybenzidine | 119904 |
| Formaldehyde | 50000 |
| 4,4′-Methylene bis (2-chloroaniline) | 101144 |
| Acrylonitrile | 107131 |
| Ethylene dibromide (1,2-Dibromoethane) | 106934 |
| DDE (1,1-p-chlorophenyl 1-2 dichloroethylene) | 72559 |
| Chlorobenzilate | 510156 |
| Dichlorvos | 62737 |
| Vinyl chloride | 75014 |
Coke Oven Emissions |
| Ethylene oxide | 75218 |
|---|---|
| Ethylene thiourea | 96457 |
| Vinyl bromide (bromoethene) | 593602 |
| Selenium sulfide (mono and di) | 7488564 |
| Chloroform | 67663 |
| Pentachlorophenol | 87865 |
| Ethyl carbamate (Urethane) | 51796 |
| Ethylene dichloride (1,2-Dichloroethane) | 107062 |
| Propylene dichloride (1,2-Dichloropropane) | 78875 |
| Carbon tetrachloride | 56235 |
| Benzene | 71432 |
| Methyl hydrazine | 60344 |
| Ethyl acrylate | 140885 |
| Propylene oxide | 75569 |
| Aniline | 62533 |
| 1,4-Dichlorobenzene(p) | 106467 |
| 2,4,6-Trichlorophenol | 88062 |
| Bis (2-ethylhexyl) phthalate (DEHP) | 117817 |
| o-Toluidine | 95534 |
| Propoxur | 114261 |
| 1,4-Dioxane (1,4-Diethyleneoxide) | 123911 |
| Acetaldehyde | 75070 |
| Bromoform | 75252 |
| Captan | 133062 |
| Epichlorohydrin | 106898 |
| Methylene chloride (Dichloromethane) | 75092 |
| Dibenz (ah) anthracene | 53703 |
| Chrysene | 218019 |
| Dimethyl aminoazobenzene | 60117 |
| Benzo (a) anthracene | 56553 |
| Benzo (b) fluoranthene | 205992 |
| Antimony trioxide | 1309644 |
| 2-Nitropropane | 79469 |
| 1,3-Dichloropropene | 542756 |
| 7, 12-Dimethylbenz(a) anthracene | 57976 |
| Benz(c) acridine | 225514 |
| Indeno(1,2,3-cd)pyrene | 193395 |
| 1,2:7,8-Dibenzopyrene | 189559 |
[63 FR 71382, Dec. 28, 1998]