ChemIDplus - Chemical Information

ChemIDplus - Chemical Information

ChemIDplus is a free, web-based search system that provides access to structure and nomenclature authority files used for the identification of chemical substances 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 380,000 chemical records, of which over 269,000 include chemical structures, and is searchable by Name, Synonym, CAS Registry Number, Molecular Formula, Classification Code, Locator Code, Structure, and/or Biological/Chemical properties.

There are two versions of this database. The ChemIDplus Lite version is available for simplified Name and RN searching without the need for plugins or applets. ChemIDplus Advanced allows various search capabilities beyond the Lite version including chemical structure and biological/chemical property searching.

NLM databases included in in ChemIDplus are: