IARC Class 1 Carcinogens - Exposures Known to Cause Cancer IARC Monographs Volumes 1 – 134

Acetaldehyde associated with consumption of alcoholic beverages Larynx
Oesophagus
Oral Cavity
Pharynx: All Combined
Salivary Gland
Upper Aerodigestive Tract (Oral Cavity, Pharynx, Larynx, Oesophagus)
Acheson Process, occupational exposure associated with Lung
Acid mists, strong inorganic Larynx
Aflatoxins Liver
Alcoholic beverages Breast
Colon
Larynx
Liver
Oesophagus
Oral Cavity
Pharynx: All Combined
Rectum
Upper Aerodigestive Tract (Oral Cavity, Pharynx, Larynx, Oesophagus)
Aluminium production Lung
Urinary bladder
4-Aminobiphenyl Urinary bladder
Areca Nut Oesophagus
Oral cavity
Aristolochic acid Renal pelvis and ureter
Aristolochic acid, plants containing Renal pelvis and ureter
Arsenic and inorganic arsenic compounds Lung
Skin (malignant non-melanoma)
Urinary bladder
Asbestos (all forms), including actinolite, amosite, anthophyllite, chrysolite, crocidolite, tremolite) NB Mineral substances (e.g., talc or vermiculite) that contain asbestos should be Regarded as carcinogenic to humans Larynx
Lung
Mesothelium (Pleura, Peritoneum, and Other)
Ovary
Auramine production Urinary bladder
Azathioprine Non-Hodgkin’s lymphoma: all combined
Skin (malignant non-melanoma)
Benzene Leukaemia Acute Myeloid
Leukaemia Other Acute Non-Lymphocytic
Benzidine Urinary bladder
Benzidine, dyes metabolized to Urinary bladder
Benzo[a]pyrene (Sufficient evidence in experimental animals)
Beryllium and beryllium compounds Lung
Betel quid with tobacco (betel quid is any chewing substance that contains areca nut) Oesophagus
Oral Cavity
Pharynx: All combined
Betel quid without tobacco (Betel quid is any chewing substance that contains areca nut) Oesophagus
Bis(chloromethyl)ether; chloromethyl methyl ether (technical grade) Lung
Oral cavity
Busulfan Leukaemia, acute myeloid
1,3-Butadiene Leukaemia: All Combined
Lymphoma: All Combined
Multiple Myeloma
Cadmium and cadmium compounds Lung
Chlorambucil Leukaemia, acute myeloid
Chlornaphazine Urinary bladder
Chromium(VI) compounds Lung
Clonorchis sinensis (infection with) Bile duct
Coal gasification Lung
Coal, indoor emissions from household combustion Lung
Coal-tar distillation Skin (malignant non-melanoma)
Coal-tar pitch Lung
Coke production Lung
Cyclophosphamide Leukaemia, acute myeloid
Urinary bladder
Cyclosporine Multiple sites (unspecified)
Non-Hodgkin’s lymphoma: all combined
Skin (malignant non-melanoma)
1,2-Dichloropropane Bile duct
Diethylstilbestrol Breast
Diethylstilbestrol (exposure in utero) Uterine cervix
Vagina
Engine Exhaust, diesel Lung
Epstein-Barr virus Hodgkin lymphoma
Non-Hodgkin’s lymphoma: Burkitt lymphoma
Non-Hodgkin’s Lymphoma: Extranodal; NK/T-cell Lymphoma (nasal type)
Non-Hodgkin’s lymphoma: Immunosuppression-related lymphoma
Pharynx: Nasopharynx
Erionite Mesothelium (pleura, peritoneum, and other)
Estrogen-progestogen menopausal therapy (combined) Breast
Endometrium
Estrogen-progestogen oral contraceptives (combined) Breast
Liver
Uterine cervix
Estrogen therapy, postmenopausal Endometrium
Ovary
Ethanol in alcoholic beverages Breast
Colon
Larynx
Larynx
Liver
Oesophagus
Oral cavity
Pharynx: All combined
Rectum
Upper aerodigestive tract (oral cavity, pharynx, larynx, oesophagus)
Ethylene oxide Limited evidence – Lymphatic And hematopoietic cancers (specifically lymphoid tumours, ie. Non-Hodgkin’s lymphoma, multiple myeloma, chronic lymphocytic leukaemia), and breast
Etoposide in combination with cisplatin and bleomycin Leukaemia, acute myeloid
Firefighter (occupational exposure as a) Mesothelium (pleura, peritoneum, and other)
Urinary bladder
Fission products, including strontium 90 Leukaemia: all combined
Leukaemia, childhood: all combined
Multiple sites (unspecified)
Fluoro-edenite fibrous amphibole Mesothelium (pleura, peritoneum, and other)
Formaldehyde Leukaemia, acute myeloid
Leukaemia, chronic myeloid
Leukaemia, other acute non- lymphocytic
Pharynx: Nasopharynx
Haematite mining (underground)- radon exposure Lung
Helicobacter Pylori (infection with) non-Hodgkin’s lymphoma: low Grade B-cell mucosa Associated lymphoid Tissue (MALT) gastric lymphoma
Stomach
Hepatitis B virus (chronic infection with) Liver
Hepatitis C virus (chronic infection with) Liver
Non-Hodgkin lymphoma: all Combined
Human immunodeficiency virus type 1 (infection with) Anus
Breast
Endothelium (Karposi sarcoma)
Eye
Hodgkin’s lymphoma
Non-Hodgkin’s lymphoma: all combined
Uterine cervix
Human papillomavirus type 16 Anus
Oral cavity
Penis
Pharynx: Oropharynx
Pharynx: Tonsil
Uterine cervix
Vagina
Vulva
Human papillomavirus 18, 31, 33, 35, 39, 45, 51, 52, 56, 58, and 59 Uterine cervix
Human T-cell lymphotropic virus type 1 Leukaemia/lymphoma, Adult T- Cell
Ionizing radiation: all types (No human studies, but causes more DNA damage than x and gamma radiation)
Iron and steel founding (occupational exposure during) Lung
Isopropyl alcohol manufacture using strong acids Nasal cavity and paranasal sinus
Karposi sarcoma herpesvirus Endothelium (Karposi sarcoma)
Primary effusion lymphoma
Leather dust Nasal cavity and paranasal sinus
Lindane Non-Hodgkin lymphoma: all Combined
Magenta production Urinary bladder
Melphalen Leukaemia, acute myeloid
Methoxsalen (8-methoxypsoralen) plus ultraviolet A radiation (PUVA) Skin (malignant non-melanoma)
Methyl-CCNU Acute myeloid leukaemia
4,4”-Methylenebis(2-chloroaniline) (MOCA) (Sufficient evidence in experimental animals)
Mineral Oils, untreated or mildly treated Skin (malignant non-melanoma)
MOPP and other combined chemotherapy including alkylating agents Leukaemia, acute myeloid
Lung
2-Naphthylamine Urinary bladder
Neutron radiation (No human studies, but causes more DNA damage than x and gamma radiation)
Nickel compounds Lung
Nasal cavity and paranasal sinus
N-Nitrosonornicotine (NNN) and 4-(N-Nitrosomethylamino)-1- (3-pyridyl)-1-butanone (NNK) – In tobacco products (Sufficient evidence in experimental animals)
Opisthorchis viverrine (infection with) Opisthorchis viverrine (infection with) Bile ductOpisthorchis viverrine (infection with) Bile duct
Opium consumption Larynx
Lung
Urinary bladder
Ortho-Toluidine Urinary bladder
Outdoor air pollution Lung
Outdoor air pollution, particulate matter in Lung
Painter (occupational exposure as a) Lung Mesothelium (pleura, peritoneum, and other)
Urinary bladder
3,4,5,3,”,4”- Pentachlorobiphenyl (PCB-126) Malignant melanoma
Positive association – Breast Non-Hodkin’s lymphoma
2,3,4,7,8-Pentachloro dibenzofuran (Sufficient evidence in experimental animals)
Pentachlorophenol Multiple myeloma
Non-Hodgkin’s lymphoma: all Combined
Phenacetin Renal pelvis and ureter
Phenacetin, analgesic mixtures containing Renal pelvis and ureter
Phosphorus-32, as phosphorous Leukaemia, acute lymphocytic
Leukaemia, acute myeloid
Leukaemia, other acute non- Lymphocytic
Plutonium Bone
Liver
Lung
Bile duct
Polychlorinated biphenyls (PCBs) Skin (melanoma)
Positive association – Breast Non-Hodgkin’s lymphoma
Polychlorinated biphenyls, dioxin-like, with a Toxicity Equivalent Factor (TEF) according to WHO (PCBs 77, 81, 105, 114, 118, 123, 126, 156, 157, 167, 169, 189) Breast Skin (melanoma)
Positive association – Non-Hodgkin’s lymphoma
Processed meat, consumption of Colon
Rectum
Radioiodines, including iodine-131 Thyroid
Radionuclides, alpha-particle emitting, internally deposited (Individually listed)
Radionuclides, beta-particle emitting, internally deposited (Individually listed)
Radium-222 and its decaying products Lung
Radium-224 and its decaying products Bone
Radium-226 and its decaying products Bone
Mastoid process
Nasal cavity and paranasal sinus
Radium-228 and its decaying products Bone
Nasal cavity and paranasal sinus
Radon- 222 Lung
Positive association - Leukaemia
Rubber manufacturing industry Leukaemia: all combined
Lung
Lymphoma: all combined
Stomach
Urinary bladder
Salted fish, Chinese style Pharynx: Nasopharynx
Schistosoma haematobium (infection with) Urinary bladder
Semustine [1-(2-Chloroethyl)-3-(4-methylcyclohexyl)-1- nitrosourea,Methyl-CCNU] Leukaemia, acute myeloid
Shale oils Skin (malignant non-melanoma)
Silica dust, crystalline, in the form of quartz or cristobalite Lung
Solar radiation-ultraviolet radiation (wavelengths 100-400nm, Encompassing UVA, UVB, and UVC) Skin (melanoma)
Skin (malignant non-melanoma)
Soot (as found in occupational exposure of chimney sweeps) Skin (malignant non-melanoma)
Sulfur mustard Lung
Tamoxifen Endometrium
2,3,7,8-Tetrachlorodibenzo-para-dioxin (TCDD), “dioxin” All cancer sites (combined)
Positive association – Lung Non-Hodgkin’s lymphoma Soft tissue sarcoma
Thiotepa Leukaemia: all combined
Thorium-232 and its decay products (Thorotrast) Bile duct
Gall bladder
Leukaemia, acute lymphocytic
Leukaemia, acute myeloid
Leukaemia, childhood: all combined
Leukaemia, chronic myeloid
Leukaemia/lymphoma, Adult T- cell
Leukaemia, other acute non- lymphocytic
Liver Positive association –
Pancreas
Prostate
Tobacco smoke, secondhand Lung
Tobacco, smokeless Oesophagus
Oral cavity
Oesophagus
Pancreas
Tobacco smoking Bile duct
Colon
Kidney
Larynx
Leukaemia, acute myeloid
Leukaemia, chronic myeloid
Liver (in smokers and smokers’ Children)
Lung
Nasal cavity and paranasal sinus
Oral cavity
Ovary
Pancreas
Pharynx: All combined
Rectum
Renal pelvis and ureter
Stomach
Upper aerodigestive tract (oral cavity, pharynx, larynx, oesophagus)
Urinary bladder
Uterine cervix
Treosulfan Leukaemia, acute myeloid
Trichloroethylene Kidney
Ultra-violet emissions from welding Eye
Ultraviolet-emitting tanning devices Eye Skin (melanoma)
Vinyl chloride Liver
Welding fumes Lung
Wood dust Nasal cavity and paranasal sinus
Pharynx: Nasopharynx
X- and Gamma-radiation - Bone
Brain
Breast
Colon
Kidney
Leukaemia, acute lymphocytic
Leukaemia, acute myeloid
Leukaemia, childhood: all combined
Leukaemia, chronic myeloid
Leukaemia/lymphoma, Adult Tcell
Leukaemia, other acute nonlymphocytic
Lung
Oesophagus
Salivary Gland
Skin (malignant non-melanoma)
Stomach
Thyroid
Urinary bladder
X- and Gamma-radiation (exposure in utero) Multiple sites (unspecified)
    • Acetaldehyde associated with consumption of alcoholic beverages
    • Acheson process, occupational exposure associated with
    • Acid mists, strong inorganic
    • Aflatoxins
    • Alcoholic beverages
    • Alpha particles (see Radionuclides)
    • Aluminium production
    • 4-Aminobiphenyl
    • Areca nut
    • Aristolochic acid
    • Aristolochic acid, plants containing
    • Arsenic and inorganic arsenic compounds
    • Asbestos (all forms, including actinolite, amosite, anthophyllite, chrysotile, crocidolite, tremolite)
    • Auramine production
    • Azathioprine