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Registry of Toxic Effects of Chemical Substances (RTECS)

National Institute for Occupational Safety and Health

This is the most comprehensive list available of potentially toxic substances, containing data on approximately 120,000 chemicals. Information is provided in abbreviated form on both acute and chronic health effects, substance identification, toxicity, carcinogenicity review, etc. This resource is valuable because it is so comprehensive. The records are cryptic, however, and can be difficult to interpret.

A printed version of this database was last produced in 1986.

Access Information

Online Commercial AccessAvailable in other formats and through other vendors
National Library of Medicine TOXNET system