The identification number issued to a chemical substance by the Chemical Abstracts Service Division or the American Chemical Society.
a number assigned to a material by the Chemical Abstracts Service ( CAS) to provide a single unique identifier. Back
CAS Number, CAS # The Chemical Abstracts Service assigns a unique number to every chemical that it registers, making this a common way to identify chemicals. A Chemical Abstract Services (CAS) collective index name is generated by using rules for chemical nomenclature that have been developed and are usually in accordance with the rules published by the International Union of Pure and Applied Chemistry (IUPAC). CAS nomenclature deviates from the IUPAC nomenclature when IUPAC nomenclature names two compounds identically. Each CAS Registry Number includes a check digit that can be used to check its validity. Note that we use the Ninth Collective Index.
Number assigned by the Chemical Abstracts Service Chemical Registry System. Refers to a single or complex substance that has a unique chemical name.
A unique number assigned to a chemical by the Chemical Abstracts Service, a division of the American Chemical Society.
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, so 'cis-2-hexene', 'trans-2-hexene', and '2-hexene' (a mixture with unspecified cis/trans composition) are all assigned separate CAS Numbers.
a unique, identifying number assigned to a chemical by the Chemical Abstracts Service (CAS).
(CASRN, RN) A unique accession number assigned by the Chemical Abstracts Service, a division of the American Chemical Society.
The American Chemical Society (ACS) uniquely assigns chemical Abstracts Service (CAS) Numbers to molecules and mixtures. CAS numbers are often used by local and state hazardous materials compliance legislation for tracking chemicals in the workplace and in the community. These numbers provide a unique identification for chemicals as well as a means for crosschecking chemical names.
CAS registry numbers are unique numerical identifiers for chemical compounds, polymers, biological sequences, mixtures and alloys. They are also referred to as CAS numbers, CAS RNs or CAS #s.
