ChemIDplus and the Drug Information Portal Content Available From PubChem Only Starting December 2022. NLM Technical Bulletin. 2022 Jul–Aug
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The National Library of Medicine's (NLM) ChemIDplus is a free, web-based search system that provides access to the 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.
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Citation Level
1997
English, etc
Website Key Features
Chemical Substance Search
Allows users to search for chemical substances by name, synonym, registry number, molecular formula, or structure.
Structure Searching
Provides the ability to search for chemicals by drawing their molecular structure.
Toxicity Data
Includes links to toxicology and environmental health information from the NLM's TOXNET system.
Chemical Identification
Offers detailed information on chemical substances, including names, synonyms, registry numbers, and molecular formulas.
Direct Links to Resources
Provides direct links to a variety of biomedical resources for chemicals of interest.
Additional information
Parent Organization
National Library of Medicine (NLM), part of the National Institutes of Health (NIH), U.S. Department of Health and Human Services.
Access
Free access to all users without the need for registration.
Update Frequency
Regularly updated with new chemical substances and information.
Contact Information
Provides contact details for support and inquiries regarding the ChemIDplus system.
Educational Resources
Includes tutorials and guides on how to use the ChemIDplus system effectively for research and education.
HTTP headers
Security headers report is a very important part of user data protection. Learn more about http headers for chem.nlm.nih.gov