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CAS REGISTRY®, the CAS substance collection, is the premier source relied upon by scientists and regulators worldwide for accurate information on chemical substances.

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CAS Registry Numbers (CAS RN) are simple and regular, convenient for database searches. They offer a reliable, common and international link to every specific substance across the various …

“CAS registry” is a registered trademark of the American Chemical society.

Quickly confirm chemical names, CAS Registry Numbers®, structures or basic physical properties by searching compounds of general interest or leveraging an API connection.

Feb 11, 2026 · The CAS reference collection aggregates and connects scientific knowledge from thousands of journals and other sources published globally in more than 50 languages dating back to …

CAS (Chemical Abstracts Service) is a division of the American Chemical Society. It is a source of chemical information and is located in Columbus, Ohio, United States.

Access the world’s most comprehensive chemical substance and reaction data. Search by structure, name, CAS Registry Number®, or spectra data. Uncover relevant literature, patents, and regulatory …

CAS content covers all disclosed chemistry and related science from thousands of journals and 109 patent authorities, as well as reputable Web sources, dissertations, books, conference proceedings, …