Download ChemIDplus Subset Data

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Download over 400,000 chemical records.

About the Data

Learn about ChemIDplus Data

ChemIDplus was a dictionary of over 400,000 chemicals (names, synonyms, and structures). ChemIDplus included links to NLM and other databases and resources, including links to federal, state and international agencies.

ChemIDplus is no longer updated. These are the final files from February 22, 2023. All ChemIDplus data have been incorporated into PubChem.

• CurrentChemID.xml: XML file containing SUPERID (the identifier in ChemIDplus), other identifiers and names, formula, chemical classification codes, notes, and links to other databases.
• chemid-20230222.xml: same as CurrentChemID.xml
• chemid.ready.20230222: a brief summary of the total number of chemid records
• NLMChemID.dtd: the DTD for the above XML file
• chemid-20230222.zip: contains the XML file plus the following structural data files
  • chemid-2023-02-21-InChi.txt: a tab-delimited list of SUPERID, InChI, and InChIKey
  • chemid-2023-02-21-SMILES.txt: a tab-delimited list of SUPERID and SMILES
• currentchemid.zip: same as chemid-2023-02-22.zip

Note that not all chemicals in ChemIDplus have structure data.

NLM Data News

For more information regarding the changes to ChemIDplus content, please see ChemIDplus and the Drug Information Portal Content Available From PubChem Only Starting December 2022 in the 2022 July-August Issue of the NLM Technical Bulletin.

The NLM Data License has been replaced by Terms and Conditions. No registration is required to access data available from NLM's FTP servers. Users will not be required to renew a license agreement at the end of the year.