The Lancet Oncology – A Working Group of 20 scientists from 10 countries met at the invitation of the International Agency for Research on Cancer (IARC) to finalise their evaluation of the carcinogenicity of four agents: anthracene, 2-bromopropane, butyl methacrylate (BMA), and dimethyl hydrogen phosphite (DMHP). 2-Bromopropane was classified as “probably carcinogenic to humans” (Group 2A) based on “sufficient” evidence for cancer in experimental animals and “strong” mechanistic evidence in experimental systems. The other three agents were classified as “possibly carcinogenic to humans” (Group 2B) based on “sufficient” evidence for cancer in experimental animals. For all four agents, the evidence regarding cancer in humans was “inadequate”, as no studies were available. These assessments will be published in Volume 133 of the IARC Monographs.

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As a national organization, our work extends across borders into many Indigenous lands throughout Canada. We gratefully acknowledge that our host institution, the University of British Columbia Point Grey campus, is located on the traditional, ancestral and unceded territories of the xʷməθkʷəy̓əm (Musqueam) people.