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List of IARC Group 1 carcinogens

Substances, mixtures and exposure circumstances in this list have been classified by the IARC as Group 1: The agent (mixture) is carcinogenic to humans. The exposure circumstance entails exposures that are carcinogenic to humans. This category is used when there is sufficient evidence of carcinogenicity in humans. Exceptionally, an agent (mixture) may be placed in this category when evidence of carcinogenicity in humans is less than sufficient but there is sufficient evidence of carcinogenicity in experimental animals and strong evidence in exposed humans that the agent (mixture) acts through a relevant mechanism of carcinogenicity.


Agents and groups of agents


  • Alcoholic beverages
  • Analgesic mixtures containing phenacetin
  • Areca nut
  • Betel quid with tobacco
  • Betel quid without tobacco
  • Coal-tar pitches
  • Coal-tars
  • Mineral oils, untreated and mildly treated
  • Salted fish (Chinese-style)
  • Shale-oils
  • Soots
  • Tobacco products, smokeless
  • Wood dust

Exposure circumstances

  • Aluminium production
  • Arsenic in drinking water
  • Auramine, manufacture of
  • Boot and shoe manufacture and repair
  • Coal gasification
  • Coke (fuel) production
  • Furniture and cabinet making
  • Haematite mining (underground) with exposure to radon
  • Secondhand smoke
  • Iron and steel founding
  • Isopropanol manufacture (strong-acid process)
  • Magenta, manufacture of
  • Painter (occupational exposure as a)
  • Rubber industry
  • Strong inorganic acid mists containing sulfuric acid (occupational exposure to)
  • Tobacco smoking


  1. This evaluation applies to the group of compounds as a whole and not necessarily to all individual compounds within the group.
  2. Evaluated as a group.
  3. There is also conclusive evidence that these agents have a protective effect against cancers of the ovary and endometrium.
  4. Specific radionuclides for which there is sufficient evidence for carcinogenicity to humans are also listed individually as Group 1 agents.
  5. There is also conclusive evidence that this agent (tamoxifen) reduces the risk of contralateral breast cancer.
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "List_of_IARC_Group_1_carcinogens". A list of authors is available in Wikipedia.
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