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The BCERF program on the Cancer Risks of Environmental Chemicals in the Home and Workplace closed on March 31, 2010. No further updates will be made to this web site. Please go Cornell University’s eCommons web site to access BCERF’s archived research and educational materials (

EnviroChem and Cancer Database

MSDS: Material Safety Data Sheets.
CAS #: Chemical Abstract Service Registry Number, a unique number assigned to each chemical.
DHHS: The Department of Health and Human Services.
NTP: The National Toxicology Program.
NTP TR #: The National Toxicology Program Technical Report Number. Each set of studies (Technical Report) evaluating the cancer causing potential of a particular chemical is assigned a unique number.
RoC: The Report on Carcinogens. The DHHS and the NTP, together with the Public Health Service, are responsible for compiling a biennial report on substances that are known to be or that are reasonably anticipated to be human carcinogens.
IARC: The International Agency for Research on Cancer, Lyon France. IARC works with international experts who critically review and evaluate the cancer risk of chemicals, other agents and mixtures and workplace exposures. Based on the strength of the scientific evidence from human, laboratory animal, and related studies, chemicals/agents are classified in one of the following categories: GROUP 1: Carcinogenic to humans GROUP 2A: Probably carcinogenic to humans GROUP 2B: Possibly carcinogenic to humans GROUP 3: Not classifiable as to its carcinogenicity to humans GROUP 4: Probably not carcinogenic to humans A detailed explanation of the IARC cancer classification system is available in the Preamble section of published monographs or is available on-line at:
OSHA: Occupational Safety and Health Administration.