Chemical Abstracts Service (CAS)

CAS is the producer of Chemical Abstracts, SciFinder, SciFinder Scholar, and co-partner in operating STN International, providing comprehensive, authoritative and reliable access to chemical and scientific information from databases covering topics such as chemistry, engineering, patents, medicine and regulatory data. Provides the most comprehensive databases of publicly disclosed research in chemistry and related sciences, including the world's largest collection of substance information, the CAS Registry.

http://www.cas.org/

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