Classification of agents that are possibly carcinogenic to humans
IARC group 2B substances, mixtures and exposure circumstances are those that have been classified as "possibly carcinogenic to humans" by the International Agency for Research on Cancer (IARC) as [ 1] This category is used when there is limited evidence of carcinogenicity in humans and less than sufficient evidence of carcinogenicity in experimental animals . It may also be used when there is insufficient evidence of carcinogenicity in humans but sufficient evidence in experimental animals. In some cases, an agent, mixture, or exposure circumstance with inadequate evidence of carcinogenicity in humans but limited evidence in experimental animals, combined with supporting evidence from other relevant data, may be included in this group.
This list focuses on the hazard linked to the agents. This means that the carcinogenic agents are capable of causing cancer, but this does not take their risk into account, which is the probability of causing a cancer given the level of exposure to this carcinogenic agent.[ 2] The list is up to date as of January 2024.[ 3]
Agents and groups of agents [ edit ]
Dacarbazine
Dantron (Chrysazin, 1,8-Dihydroxyanthraquinone)
Daunomycin
DDT (p ,p' -DDT)
N,N'-Diacetylbenzidine
2,4-Diaminoanisole
4,4'-Diaminodiphenyl ether
2,4-Diaminotoluene
Dibenz[a,h ]acridine
Dibenz[c,h ]acridine
7H -Dibenzo[c,g ]carbazole
Dibenzo[a,h ]pyrene
Dibenzo[a,i ]pyrene
Dibromoacetic acid
Dibromoacetonitrile
1,2-Dibromo-3-chloropropane
2,3-Dibromopropan-1-ol
1,4-Dichloro-2-nitrobenzene
Dichloroacetic acid
para-Dichlorobenzene
3,3'-Dichlorobenzidine
3,3'-Dichloro-4,4'-diaminodiphenyl ether
1,2-Dichloroethane
2,4-D (2,4-dichlorophenoxyacetic acid)
1,3-Dichloropropene (technical grade)
1,3-Dichloro-2-propanol
Dichlorvos
Diethanolamine
Di(2-ethylhexyl)phthalate
1,2-Diethylhydrazine
Diglycidyl resorcinol ether
Digoxin
Dihydrosafrole
Diisopropyl sulfate
3,3'-Dimethoxybenzidine (o -Dianisidine)
N,N-Dimethylacetamide
para-Dimethylaminoazobenzene
trans -2-[(Dimethylamino)methylimino]-5-[2-(5-nitro-2-furyl)-vinyl]-1,3,4-oxadiazole
2,6-Xylidine (2,6-Dimethylaniline)
Dimethylarsinic acid
3,3'-Dimethylbenzidine (o -Tolidine)
1,1-Dimethylhydrazine
Dimethyl hydrogen phosphite
Dimethyl-p-toluidine
3,7-Dinitrofluoranthene
3,9-Dinitrofluoranthene
1,3-Dinitropyrene
1,6-Dinitropyrene
1,8-Dinitropyrene
2,4-Dinitrotoluene
2,6-Dinitrotoluene
1,4-Dioxane
1,2-Diphenylhydrazine
Diphenylamine
Disperse Blue 1
Foreign bodies, implanted in tissues
Polymeric, prepared as thin smooth films (with the exception of poly(glycolic acid))
Metallic, prepared as thin smooth films
Metallic cobalt, metallic nickel and an alloy powder containing 66-67% nickel, 13-16% chromium and 7% iron
HC Blue No. 1
Heptachlor
Hexachlorobenzene
Hexachloroethane
Hexachlorocyclohexanes
Hexamethylphosphoramide (HMPA)
2,4-Hexadienal
Human immunodeficiency virus type 2 (infection with)
Human papillomavirus types 26, 53, 66, 67, 70, 73, 82
Human papillomavirus types 30, 34, 69, 85, 97
Human papillomavirus types 5 and 8 (in patients with epidermodysplasia verruciformis )
Hydrochlorothiazide
1-Hydroxyanthraquinone
Magnetic fields (extremely low frequency )
Malachite green
MeA-α-C (2-Amino-3-methyl-9H -pyrido[2,3-b ]indole)
Medroxyprogesterone acetate
MeIQ (2-Amino-3,4-dimethylimidazo[4,5-f ]quinoline)
MeIQx (2-Amino-3,8-dimethylimidazo[4,5-f ]quinoxaline)
Melamine
Merphalan
Methyl acrylate
Methyl isobutyl ketone
Methylarsonic acid
2-Methylaziridine (Propyleneimine)
Methylazoxymethanol acetate
5-Methylchrysene
4,4'-Methylene bis(2-methylaniline)
4,4'-Methylenedianiline
Methyleugenol
2-Methylimidazole
4-Methylimidazole
Methylmercury compounds
N-Methylolacrylamide 1
2-Methyl-1-nitroanthraquinone (uncertain purity)
N-Methyl-N-nitrosourethane
Methylthiouracil
α-Methylstyrene
Metronidazole
Michler's base (4,4'-methylene-bis(N ,N -dimethyl)benzenamine)
Michler's ketone (4,4'-bis(dimethylamino)benzophenone)
Microcystin-LR
Mirex
Mitomycin C
Mitoxantrone
Molybdenum trioxide
3-Monochloro-1,2-propanediol (3-MCPD)
Monocrotaline
5-(Morpholinomethyl)-3-[(5-nitrofurfurylidene)amino]-2-oxazolidinone
β-Myrcene
1,1,1,2-Tetrachloroethane
1,1,2,2-Tetrachloroethane
Tetrachlorvinphos
Tetrahydrofuran
Tetranitromethane
Thioacetamide
4,4'-Thiodianiline
2-Thiouracil
Titanium dioxide
Toluene diisocyanates
Toxaphene (Polychlorinated camphenes)
Triamterene
Trichlormethine (Trimustine hydrochloride)
Trichloroacetic acid
2,4,6-Trichlorophenol
Trp-P-1 (3-Amino-1,4-dimethyl-5H -pyrido[4,3-b ]indole)
Trp-P-2 (3-Amino-1-methyl-5H -pyrido[4,3-b ]indole)
Tungsten weapons-grade (with nickel and cobalt) alloy
Trypan blue
Aloe vera , whole leaf extract
Bitumens , occupational exposure to straight-run bitumens and their emissions during road paving
Bitumens , occupational exposure to hard bitumens and their emissions during mastic asphalt work
Carrageenan , degraded (Poligeenan )
Chlorinated paraffins of average carbon chain length C12 and average degree of chlorination approximately 60%
Diesel fuel , marine
Engine exhaust , gasoline
Fuel oils , residual (heavy)
Fusarium moniliforme , toxins derived from (fumonisin B1 , fumonisin B2 , and fusarin C )
Gasoline
Goldenseal root powder
Magenta dyes (CI Basic Red and fuchins )
Pickled vegetables (traditional in Asia)
Toxaphene (Polychlorinated camphenes)
Welding fumes
Exposure circumstances [ edit ]
^ "List of Classifications, Agents classified by the IARC Monographs, Volumes 1–124" . IARC Monographs on the Evaluation of Risk to Humans . IARC. July 7, 2019. Retrieved July 14, 2019 .
^ "IARC monographs preamble (as amended in 2019)" (PDF) . International Agency for Research on Cancer (IARC). Retrieved August 18, 2023 . A cancer hazard is an agent that is capable of causing cancer, whereas a cancer risk is an estimate of the probability that cancer will occur given some level of exposure to a cancer hazard.
^ "List of Classifications – IARC Monographs on the Identification of Carcinogenic Hazards to Humans" . monographs.iarc.who.int . Retrieved 2024-02-01 .
^ Press release No 208, 31 May 2011 , IARC classifies Radiofrequency Electromagnetic Fields as possibly carcinogenic to humans
^ "Printing Processes and Printing Inks, Carbon Black and Some Nitro Compounds" . IARC Publications Website . Retrieved 2023-10-31 .
^ J, Wilbourn; C, Partensky; WG., Morgan (1996). "Printing Processes and Printing Inks, Carbon Black and Some Nitro Compounds" . International Agency for Research on Cancer. PMID 9148039 . Retrieved 2023-10-31 .
Prominent human carcinogens IARC lists