How likely are lewisite and mustard-lewisite to cause cancer?
The Department of Health and Human Services (DHHS), the International Agency for Research on Cancer (IARC), and theEnvironmental Protection Agency(EPA) have not classified Lewisite as to its carcinogenicity. Both the DHHS and IARC have classified the blister agent H/HD (thesulfur mustardused in the Mustard-Lewisite mixture) as a human carcinogen. We to not know whether the Mustard-Lewisite mixture might also be a human carcinogen.