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The National Library of Medicine Data Distribution

The NLM Data Distribution Program is the preferred access point for bulk downloading of the datasets listed below. Downloading and use of these datasets is completely free of charge. Please review the Terms and Conditions. Downloading of datasets implies agreement to Terms and Conditions. For questions or assistance regarding the data distributed within this program, either visit Contact Us or email us at


Chemical Carcinogenesis Research Information System: Fully referenced data bank containing chemical records with carcinogenicity, mutagenicity, tumor promotion, and tumor inhibition test results.


The authority file used for the identification of chemical substances cited in other NLM databases.


Genetic Toxicology: Authority file used for the identification of chemical substances cited in other NLM databases.


Hazardous Substances Data Bank: Toxicology data focused on the toxicology of potentially hazardous chemicals.


Drugs and Lactation Database: A database of drugs and other chemicals to which breastfeeding mothers may be exposed.


A bibliographic database for toxicology, encompassing the biochemical, pharmacological, physiological, and toxicological effects of drugs and other chemicals.


Health Services Research Projects in Progress (HSRProj): Ongoing health services research and public health projects containing descriptions of research in progress funded by federal and private grants and contracts.

Catalog Record Data

Catfile, CatfilePlus, Serfile data availble for download in XML and MARC 21 formts.

Other Resources

NLM Data resources available for download.