CAS Number Lookup
A CAS number is the international identifier for a chemical substance. Enter a CAS number, name or alias to find the compound; you can also start from the popular CAS numbers below.
Popular CAS Numbers
N-Methylcyclohexanamine hydrochloride65845-61-6Potassium indigotrisulfonate67627-18-3Ammonium tetrathiomolybdate15060-55-6N-benzylcyclohexanamine.hydrochloride16350-96-21,3-Diaminopropane dihydrochloride10517-44-9Lithium aluminate12003-67-71-Octanoylbenzotriazole58068-80-7Hexaamminecobalt(III) nitrate10534-86-8vanadium oxide12037-42-2COBALT TETRAFLUOROBORATE HEXAHYDRATE26490-63-1Copper(II) tetrafluoroborate hexahydrate72259-10-0Cerium(IV) sulfate hydrate123333-60-8Tetrahydro-2H-pyran-3-amine hydrochloride675112-58-0Chromium(III) acetylacetonate21679-31-2Ruthenium(III) acetylacetonate14284-93-6Yttrium(III) 2,4-pentanedionate15554-47-9Manganese(II) citrate10024-66-5Cobalt(II) fluoride10026-17-2Copper(II) ethoxide2850-65-9Potassium polyphosphate29057-10-1Acrylic acid, nickel (II) salt60700-37-0Piperazine hydrochloride hydrate6094-40-2Lithium formate monohydrate6108-23-2Ethyl D-tryptophanate hydrochloride61535-49-7Zinc L-lactate6155-68-6Calcium/sodium PVM/MA copolymer62386-95-2Naphthenic acids, sodium salts61790-13-4Calcium cyclohexanebutyrate110861-66-0Cerium(III) trifluoromethanesulfonate hydrate698999-65-4Tris(ethylenediamine)nickel(II) chloride hydrate699012-90-3
CAS Number FAQ
What is a CAS number?
A CAS Registry Number is an identifier assigned by the Chemical Abstracts Service, formatted as 2–7 digits, a hyphen, 2 digits, a hyphen and a check digit.
How do I look up a compound by CAS number?
Enter the CAS number in the search box for an exact match, or search by Chinese name, English name or alias.
Is a CAS number unique?
A CAS number usually refers to one substance or substance class, and the same substance may have multiple names or aliases; Jingsj uses a CID as the stable record identifier.