Chemical Abstracts Service

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Chem·i·cal Ab·stracts Ser·vice

(CAS) (kem'i-kăl ab'strakts sĕr'vis)
This service assigns a unique CAS number to each chemical for identification and also provides a physical and chemical description of the chemical.
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About CAS Chemical Abstracts Service (CAS), a division of the American Chemical Society, is the world's authority for chemical information and related solutions.