In February 2016, the International Agency for Research on Cancer (IARC) gathered together international experts to evaluate the carcinogenicity of seven industrial chemicals.
N,N-dimethylformamide (a solvent), 2-mercaptobenzothiazole (found in rubber products), hydrazine (used in rocket propellant and aircraft fuel), and tetrabromobisphenol A (a flame retardant) were classified as probably carcinogenic to humans (Group 2A).
1-bromopropane (a solvent used in chemical manufacturing, spray adhesives, vapour degreasing, and dry cleaning), 3-chloro-2-methylpropene (used in chemical industry and as a seed fumigant), and N,N-dimethyl-p-toluidine (used in dental materials, bone cement and nail polish) were classified as possibly carcinogenic to humans (Group 2B).
These assessments are published as volume 115 of the IARC Monographs. Click here to read a summary of the evaluations published in The Lancet Oncology.