NIEHS' National Toxicology Program released the 13th Report on Carcinogens
October 2, 2014 — NIEHS' National Toxicology Program released the 13th Report on Carcinogens listing 243 substances as "known" or "reasonably anticipated" to cause cancer in humans. The bi-annual report is a science-based document that identifies chemical, biological, and physical agents determined to be cancer hazards for people living in the United States, prepared by NTP on behalf of the U.S. Department of Health and Human Services. The four substances added to the report include: Ortho-toluidine, used to make rubber chemicals, pesticides, and dyes, has been reevaluated and is now listed as a known human carcinogen. Three substances have been added as reasonably anticipated to be human carcinogens. These include 1-bromopropane, used as a cleaning solvent and spray adhesive; cumene, used to make phenol and acetone, and also found in fuel products and tobacco smoke; and the wood preservative mixture pentachlorophenol.