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IARC Working Group on the Evaluation of Carcinogenic Risks to Humans. Some Chemicals Used as Solvents and in Polymer Manufacture. Lyon (FR): International Agency for Research on Cancer; 2017. (IARC Monographs on the Evaluation of Carcinogenic Risks to Humans, No. 110.)

Cover of Some Chemicals Used as Solvents and in Polymer Manufacture

Some Chemicals Used as Solvents and in Polymer Manufacture.

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6Evaluation

6.1. Cancer in Humans

There is limited evidence in humans for the carcinogenicity of dichloromethane. Positive associations have been observed between exposure to dichloromethane and cancer of the biliary tract and non-Hodgkin lymphoma.

6.2. Cancer in experimental animals

There is sufficient evidence for the carcinogenicity of dichloromethane in experimental animals.

6.3. Overall evaluation

Dichloromethane is probably carcinogenic to humans (Group 2A).

6.4. Rationale

The overall evaluation of Group 2A was based on sufficient evidence in experimental animals and limited evidence in humans. In addition, a Group 2A evaluation was also supported by sufficient evidence in experimental animals, and the strong evidence that the metabolism of dichloromethane via GSTT1 leads to the formation of reactive metabolites, that GSTT1 activity is strongly associated with genotoxicity in vitro and in vivo, and that GSTT1-mediated metabolism of dichloromethane occurs in humans.

© International Agency for Research on Cancer, 2017. For more information contact publications@iarc.fr.
Bookshelf ID: NBK436246

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