Chemical Abstracts Service (see comment)
Subject Area 1:
CAS Registry Numbers are unique numerical identifiers assigned by the "Chemical Abstracts Service" to every chemical described in the open scientific literature The assigning agency, Chemical Abstracts Service (CAS) is a function of the American Chemical Society (ACS); Hendizadeh, Hadi: A unique identifier for chemical substances. Chemical Abstracts Service (CAS) is a division of the American Chemical Society that is responsible for the administration, quality assurance and maintenance of the CAS registry. A CAS Number itself has no inherent chemical significance but provides an unambiguous way to identify a chemical substance or molecular structure when there are many possible systematic, generic, proprietary or trivial names.