Chemical Abstracts Service Registry Number (CAS Number)

Chemical Abstracts Service (CAS) Number: A unique accession number assigned by the Chemical Abstracts Service, a division of the American Chemical Society. Other than being guaranteed unique to a given compound, this number has no particular meaning. CAS Registry Numbers are assigned to every uniquely-identifiable substance.


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The Life Sciences glossary with terminology, acronyms, for regulatory, quality, compliance, clinical trials, and pharmacovigilance software.