Table III-1a.
Group 1 carcinogens
| Substance | CAS No. | Year of proposal |
|---|---|---|
| *Evaluation does not necessarily apply to all individual chemicals within the group. †Provisional. ( ) in the year of proposal indicates year of reconsideration resulting in no classification change. | ||
| 4-Aminobiphenyl | 92-67-1 | '81, '86 |
| Arsenic and inorganic arsenic compounds* | 7440-38-2 | '81, '86, ('00) |
| Asbestos | 1332-21-4 | '81, '86, ('00) |
| Benzene | 71-43-2 | '81, '86, ('97) |
| Benzidine | 92-87-5 | '81, '86 |
| Benzotrichloride | 98-07-7 | '81, '86, ('01) |
| Beryllium and compounds*† | 7440-41-7 | '86, '16 |
| Bis (chloromethyl) ether | 542-88-1 | '81, '86 |
| 1,3-Butadiene | 106-99-0 | '91, '95, '01 |
| Cadmium and compounds* | 7440-43-9 | '86, '91, '96 |
| Chromium (VI) compounds | 18540-29-9 | '81, '86 |
| Coal-tar pitch volatiles | — | '81, '86, ('04) |
| Coal-tars | 8007-45-2 | '81, '86, ('04) |
| 1,2-Dichloropropane | 78-87-5 | '13, '14 |
| Erionite | 12510-42-8 | '91 |
| Ethylene oxide | 75-21-8 | '86, '90, '96 |
| Ionizing radiation | — | '12 |
| Mineral oils (untreated and mildly treated) | — | '81, '86, '91 |
| 2-Naphthylamine | 91-59-8 | '81, '86 |
| Nickel smelting dusts* | 7440-02-0 | '81, '86, '91, ('09) |
| Polychlorinated biphenyls (PCB)† | 1336-36-3, 53469-21-9, 11097-69-1 | '86, '91, '16 |
| Shale oils | 68308-34-9 | '95 |
| Silica (crystalline) | 14808-60-7 | '91, '01 |
| Soots | — | '81, '86 |
| Sulphur dichlordiethyl | 505-60-2 | '86 |
| Talc containing asbestiform fibers | 14807-96-6 | '91 |
| 2,3,7,8-Tetrachlorodibenzo-p-dioxin | 1746-01-6 | '86, '00 |
| Tobacco smoke | — | '10 |
| o-Toluidine† | 95-53-4 | '86, '95, '01, '16 |
| Trichloroethylene | 79-01-6 | '96, '15 |
| Vinyl chloride | 75-01-4 | '81, '86 |
| Wood dust | — | '98 |