Library Class and Subject Guides: Chemistry: Web sites

Web Resources

PubChem
Contains the chemical structures of small organic molecules and information on their biological activities. Also includes substance information, compound structures, and bioactivity data in three primary databases, PCSubstance, PCCompound, and PCBioAssay, respectively. Integrated with Entrez, NCBI's primary search engine, it also provides compound neighboring, sub/superstructure, similarity structure, bioactivity data, and other searching features.

Science.gov
Comprises selected resources from "17 U.S. government science organizations within 12 Federal agencies. These agencies form the voluntary Science.gov Alliance. Visitors to the site can search across Alliance agency resources via one query...Two major types of information are included — selected authoritative science Web sites and often hard-to-access scientific databases."