This is a list of CAS numbers by chemical formulas and chemical compounds, indexed by formula.The CAS number is a unique number applied to a specific chemical by the Chemical Abstracts Service (CAS).This list complements alternative listings to be found at list of inorganic compounds and glossary of chemical formulae. A B C D E F G H I K L M N O P R S T U V W X Y Z See also External links PubChem Search Webelements ATSDR Toxic Substances Common Chemistry – Most common substances from Chemical Abstracts Service CAS numbers list from ChemSynthesis service Chemical compounds CAS numbers by chemical compound ro:Număr registru CAS