Who publishes ChemIDplus?

National Library of Medicine, part of U.S. Department of Health & Human Services, publishes this dataset on Data.gov.

How often is it updated?

The publisher does not list a schedule. The last update was on 06/18/2025.

How do I download it?

Use the official source link above to view or request the data.

Checked Oct 30, 2026

Federal dataHealth

ChemIDplus

Name: ChemIDplus
Creator: National Library of Medicine
Published: 2020-09-21T00:00:00.000Z

Published by National Library of Medicine · Updated 06/18/2025

Official source

Last updated: 06/18/2025; First published 09/21/2020
Update frequency: Not listed
Formats: Web only
Coverage: Nationwide; Federal data

About this dataset

ChemIDplus, the Chemical Identification Plus Database, is no longer updated. These are the final files from February 22, 2023. All ChemIDplus data have been incorporated into PubChem. ChemIDplus was a dictionary of over 400,000 chemicals (names, synonyms, and structures). ChemIDplus includes links to NLM and other databases and resources, including links to federal, state and international agencies. NLM makes a subset of ChemIDplus data available for download. The ChemIDplus Subset does not include the structure or the toxicity data available from the NLM web versions of the database. The ChemIDplus Subset is updated monthly.

Files and access

Links open the official government source

Download ChemIDplus Subset Dataftp.nlm.nih.govWeb page
Download ChemIDplus Sample Dataftp.nlm.nih.govWeb page

Links open outside websites we do not control.

Frequently asked questions

Who publishes ChemIDplus?: National Library of Medicine, part of U.S. Department of Health & Human Services, publishes this dataset on Data.gov.
How often is it updated?: The publisher does not list a schedule. The last update was on 06/18/2025.
How do I download it?: Use the official source link above to view or request the data.

Where this catalog comes from

Data.gov CatalogU.S. General Services Administration
State and local open data portalsSocrata Discovery API
State and city CKAN portalsCalifornia, Virginia, Boston, Houston and more
Government ArcGIS Hub sitesCity and county GIS data

Catalog checked 10/24/2026

We list dataset descriptions only. Downloads and APIs link straight to the official government source, which holds the current version and its terms of use.

Source: Data.gov · Last updated 10/24/2026 · Listing only; the data stays with the publisher