1,2-Dibromo-3-chloropropane (DBCP)
1,4-Butanediol dimethanesulfonate (Busulfan)
2-Naphthylamine
4-Aminobiphenyl (4-amino-diphenyl)
5-Methoxypsoralen with ultraviolet A therapy
Arsenic (inorganic arsenic compounds)
Asbestos
Azathioprine
Benzene
Certain combined chemotherapy for lymphomas
Chlorambucil
Chloromethyl methyl ether (technical grade)
Chromium (hexavalent compounds)
Coke oven emissions
Conjugated estrogens
Cyclophosphamide (hydrated)
Diethylstilbestrol (DES)
Ethylene oxide
Melphalan
Mustard Gas
Soots, tars, and mineral oils (untreated and mildly treated oils and used engine oils)
Thorium dioxide
Treosulfan
Vinyl chloride
