Group 1 agents evaluated in the IARC Monographs Volumes 1–120, excluded from primary list of occupational carcinogens
| Agent | Volume (a) | Year (a) | Cancers with sufficient evidence in humans (b) |
| Reason for Exclusion: Group 1 classification based on mechanistic upgrade | |||
| Ethylene oxide | 60 | 1994 | N/A |
| 2,3,4,7,8-Pentachlorodibenzofuran | 100F | 2012 | N/A |
| 3,4,5,3’,4’-Pentachlorobiphenyl (PCB-126) | 100F | 2012 | N/A |
| 4,4'-Methylenebis(2-chloroaniline) (MOCA) | 99 | 2010 | N/A |
| Benzidine, dyes metabolized to | 99 | 2010 | N/A |
| Benzo(a)pyrene | 92 | 2010 | N/A |
| Neutron radiation | 75 | 2000 | N/A |
| Reason for Exclusion: Evaluation did not include occupational epidemiology data | |||
| Aflatoxins | Sup 7 | 1987 | Liver |
| Erionite | Sup 7 | 1987 | Mesothelioma |
| Fission products, including strontium-90 | 100D | 2012 | Salivary gland, oesophagus, stomach, colon, lung, bone, basal cell of the skin, female breast, kidney, urinary bladder, brain and CNS, thyroid, leukaemia |
| Fluoro-edenite fibrous amphibole | 111 | 2017 | Mesothelioma |
| Reason for Exclusion: Group 1 classification is for an occupation, industry, or process | |||
| Acheson process, occupational exposure associated with | 111 | 2017 | Lung |
| Aluminium production | Sup 7 | 1987 | Lung, bladder |
| Auramine production | Sup 7 | 1987 | Bladder |
| Coal gasification | Sup 7 | 1987 | Lung |
| Coal-tar distillation | 92 | 2010 | Skin |
| Coke production | Sup 7 | 1987 | Lung |
| Haematite mining (underground, with exposure to radon)(c) | Sup 7 | 1987 | Lung |
| Iron and steel founding (occupational exposure during) | Sup 7 | 1987 | Lung |
| Isopropyl alcohol manufacture using strong acids | Sup 7 | 1987 | Nasal cavity |
| Magenta production | Sup 7 | 1987 | Bladder |
| Painter (occupational exposure as a) | 47 | 1989 | Lung, mesothelioma, bladder |
| Rubber manufacturing industry (occupational exposures in) | Sup 7 | 1987 | Leukaemia, lymphoma, lung, stomach, bladder |