CAS Number Lookup Tool

Search over 80,000 chemical compounds by CAS number. Get molecular formula, weight, density, melting/boiling point, and more. Free tool by SKYSEVEN Chemical.

About CAS Numbers

A CAS Registry Number is a unique numerical identifier assigned by the Chemical Abstracts Service to every chemical substance described in the open scientific literature. It contains up to 10 digits separated by hyphens (e.g. 107-98-2). Use this free tool to look up any chemical by its CAS number and get molecular properties instantly.

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