For definitions of these groups, please see the Preamble.

 

The Preamble to the IARC Monographs describes the objective and scope of the programme, the scientific principles and procedures used in developing a Monograph, the types of evidence considered and the scientific criteria that guide the evaluations. The Preamble should be consulted when reading a Monograph or list of evaluations.

It is strongly recommended to consult the complete Monographs on these agents, the publication date, and the list of studies considered. Significant new information might support a different classification.

For agents that have not been classified, no determination of non-carcinogenicity or overall safety should be inferred.

Table Last Update 09.12.2020

 

Group 1	Carcinogenic to humans	121 agents
Group 2A	Probably carcinogenic to humans	89
Group 2B	Possibly carcinogenic to humans	315
Group 3	Not classifiable as to its carcinogenicity to humans	497

- List of Classifications by cancer site Vol. 1-128 November 2020 (PDF file)
- List of Classifications by cancer site Vol. 1-128 November 2020 (XLS file)
- List of Classifications by cancer site Vol. 1-124 July 2019 (PDF file)
- List of Classifications by cancer site Vol. 1-124 July 2019 (XLS file)
- Preventable Exposures Associated With Human Cancers (Cogliano et al., 2011)