Chemical Abstracts Service (Cas)

CAS (Chemical Abstracts Service) is a division of the American Chemical Society. We are located in Columbus, Ohio. CAS is the producer of the largest and most comprehensive databases of chemical information. Our principal databases are Chemical Abstracts (CA) which contains about 14 million document records from the chemical journal and patent literature, and Registry which contains over 21 million substance records.

CAS also operates the STN International online service with partner organizations in Europe and Asia. STN provides access to nearly 200 databases covering topics such as science, technology, patents, and business information.

CAS offers print, CD-ROM, online, desktop, and web based access to databases covering science, engineering, technology, patents, business information, and much more. These products are designed to accommodate a wide range of information needs, whether you are an infrequent searcher who only needs a few quick answers, or a professional searcher who requires a more powerful and comprehensive set of search tools.