This is a list of

CAS number A CAS Registry Number (also referred to as CAS RN or informally CAS Number) is a unique identification number assigned by the Chemical Abstracts Service (CAS), US to every chemical substance described in the open scientific literature. It inclu ...

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chemical formula In chemistry, a chemical formula is a way of presenting information about the chemical proportions of atoms that constitute a particular chemical compound or molecule, using chemical element symbols, numbers, and sometimes also other symbol ...

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chemical compound A chemical compound is a chemical substance composed of many identical molecules (or molecular entities) containing atoms from more than one chemical element held together by chemical bonds. A molecule consisting of atoms of only one element ...

s, indexed by formula.The CAS number is a unique number applied to a specific chemical by the

Chemical Abstracts Service CAS (formerly Chemical Abstracts Service) is a division of the American Chemical Society. It is a source of chemical information. CAS is located in Columbus, Ohio, United States. Print periodicals ''Chemical Abstracts'' is a periodical index t ...

(CAS).This list complements alternative listings to be found at list of inorganic compounds and glossary of chemical formulae.

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PubChem SearchWebelementsATSDR Toxic SubstancesCommon Chemistry – Most common substances from Chemical Abstracts Service
Chemical compounds CAS numbers by chemical compound * ro:Număr registru CAS

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