Everything about Chemical Abstracts Service totally explained
Chemical Abstracts Service (
CAS) is a division of the
American Chemical Society, and produces
Chemical Abstracts, and related products. It is located in
Columbus, Ohio,
USA.
CAS provides the largest databases of publicly disclosed
chemistry-related information, makes them accessible through search and retrieval software and provides links to the original literature and patents. The term "Chemical Abstracts" is often used loosely to apply to all the different files and products, but the different parts now have specific names. In 2007 the Chemical Abstracts Service was designated an
ACS National Historical Chemical Landmark in recognition of its significance as the most comprehensive repository of research in chemistry and related sciences.
Databases
The two principal databases that support the different products are CAplus and Registry.
CAplus
consists of bibliographic information and abstracts for all articles in chemical journals worldwide, and chemistry-related articles from all scientific journals, patents, and other scientific publications.
Registry
contains information about 33 million organic and inorganic substances, and 59 million
DNA sequences. The chemical information is produced by CAS; the sequence information comes from CAS and
GenBank, produced by the
National Institutes of Health. The chemical information is prepared by the CAS Registry System, which identifies each compound with a specific
CAS registry number, index name, and graphic representation of its chemical structure.
The assignment of chemical names is done according the
chemical nomenclature rules for CA index names, which is slightly different from the internationally standard
IUPAC names, according to the rules of
IUPAC
Products
The material from these basic and supplementary databases, is searchable in many ways. CAS databases are available via two principal database systems, STN, and SciFinder.
STN
STN International (Scientific & Technical Information Network) is a system operated jointly by CAS and
FIZ Karlsruhe, and is intended primarily for information professionals, using a
command language interface rather than a graphics interface. In addition to CAS databases, STN also provides access to many other databases which are similar to other commercial systems such as
Dialog.
SciFinder
SciFinder is a CAS software
client application designed primarily for use by professional chemists in commercial organizations. Versions for both the Windows and Macintosh operating systems are available. SciFinder Scholar is a version designed for universities and other academic institutions and lacks some supplementary features for multi-database searching. They are both designed with a graphics interface, making them particularly suitable for searching the Registry file for chemical structures.
CAS released a Web version of SciFinder in 2008.
Further Information
Get more info on 'Chemical Abstracts Service'.
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