Explore Chemical and Drug Information with PubChem

Two resources, ChemIDplus and the Drug Information Portal, are being retired by the National Library of Medicine (NLM) by mid-December 2022, as announced in the NLM Technical Bulletin. PubChem will serve as NLM’s single source for chemical information after ChemIDplus and the Drug Information Portal are retired. All of the data found in ChemIDplus and the Drug Information Portal is currently available and will continue to be available in PubChem.

PubChem is the world’s largest collection of freely accessible chemical information. Search chemicals by name, molecular formula, structure, and other identifiers. Find chemical and physical properties, biological activities, safety and toxicity information, patents, literature citations, and more. About PubChem provides a wealth of information about using PubChem, including sections on PubChem News, What’s in PubChem, PubChem Search and Tools, and Programmatic Access.

The HSLS Drug Information Resource Guide provides access to additional drug information by topic. For questions about using PubChem and other drug information resources, please contact Ask a Librarian.