Database with tabulated toxicity data for over 135,000 chemical substances. Extracted from scientific literature world-wide, the information presented includes specifics on mutagenicity, carcinogenicity, reproductive hazards, and acute and chronic toxicity of hazardous substances. Produced by the National Institute for Occupational Safety and Health (NIOSH). Available online (via National Library of Medicine, Datastar, Dialog, chemical Information Service (CIS – see separate entry), DIMDI, STN) and on CDROM (from Silverplatter, see separate entry also as part of discs: TOMES Plus(R), Chembank)