ChemIDplus

ChemIDplus provides access to structure and nomenclature authority files used for the identification of chemical substance cited in National Library of Medicine (NLM) databases. ChemIDplus also provides structure searching and direct links to many biomedical resources at NLM and on the Internet for chemicals of interest. The database contains over 349,000 chemical records, of which over 56,000 include chemical structures, and is searchable by name, synonym, CAS registry number, molecular formula, classification code, locator code, and structure. ChemIDplus is searchable through TOXNET's Toxicology data search.