Registry Database Online Chemical Abstracts Service

CHEMICAL ABSTRACTS SERVICE Division of the Ameriean Chemieal Society, 2540 Olentangy River Road, Columbus OH 43210, (614) 447-3731. Established 1907. Over 13 million abstracts of chemical related literature and patents, and over 16 million material records. Publishes numerous abstracts, current awareness bulletins, and registry handbooks. Most literature now also available on CD-ROMs and online through STN International, which has 200 databases available. Connected to international databases. 

Chemical Abstracts Service (CAS) Registry Number This is a imique identifier assigned by the American Chemical Society to chemicals recorded in the CAS Registry System. This nrrmber is used to access various chemical databases such as the Hazardous Substances Data Bank (HSDB), CAS Online, Cherrrical Substances Irrfomration Network and many others. This entry is also useful to conclusively identify a substance regardless of the assigned name. 

Chemical Abstracts Service is the publisher of Chemical Abstracts and corresponding products and services, which are available in the following formats printed, microform, online databases, CD-ROM, World Wide Web. Polymers selected for inclusion in the CAS Chemical Registry System and the CA Chemical Substance Indexes are indexed in two ways ... 

The literature before 1967 is included retrospectively in the database CAOLD, which, in the meantime, contains 700,000 references to 1.4 million substances, which were mentioned before 1967, and 152.000 references to patents. For this database Chemical Abstracts Service scans bit by bit the Formula Index of the Sixth (1957-1961) and the Seventh (1962-1966) Collective Period. Therefore only substance references are contained in this database with no text information or even abstracts. However, cross-references to patents are marked with P. Using this database you have to consider that the chemical nomenclature in those days was quite different to the names in use today. Therefore an online search in CAOLD should be proceded by a search in the Registry File (Sect. 7.6) and then continued with the appropriate CAS Registry Number in CAOLD. 

CAS Registry Numbers are included in the printed Chemical Abstracts chemical substance and formula indexes and in the CAS databases. The full set of CAS Chemical Registry System database information—structures, names, formulas, and ring data—is available for search and display through STN International, SciFinder, and other CAS search services. CAS Registry information is also available in CAS databases offered by other online system vendors. 

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