The Toxicology Data Network is sponsored by the National Library of Medicine (National Institutes of Health). It contains a collection of databases covering toxicology, hazardous chemicals, and related topics.

Health and safety lists, past, present and future studies in toxicity and carcinogenicity.

A collaberative effort between several major universities with the goal of cataloging toxicological information. Search and browse through a large number of reports, profiles and briefs on toxicology.

Three individual EPA databases are combined to provide information on chemical-specific toxicity values for aquatic and terrestrial plants and animals.