The National Library of Medicine's open-access database of over 370,000 chemicals. Can be searched by compound identifiers such as Chemical Name, CAS Registry Number, Molecular Formula, Classification Code, Locator Code, and Structure or Substructure.
Search for data on specific compounds in the Chemistry WebBook based on name, chemical formula, CAS registry number, molecular weight, chemical structure, or selected ion energetics and spectral properties.
Use this database to get information on chemical health and safety data received by EPA and EPA's assessments and regulatory actions for specific chemicals under the Toxic Substances Control Act (TSCA).
Contains "one of the world's most comprehensive and up-to-date lists of internet-linked chemistry journals." Links often allow you to browse current and previous tables of contents; sometimes allow searching, and occasionally provide full-text of articles. Produced by the Cambridge University Chemical Laboratory.
The American Chemical Society is a congressionally chartered independent membership organization which represents professionals at all degree levels and in all fields of chemistry and sciences that involve chemistry.