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

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 …

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

4 days ago · 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 provides solutions and services that help empower scientific discoveries. Learn how CAS can facilitate your research and drive innovation.

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

Oct 8, 2024 · What is a CAS Number? A CAS number is a unique identifier assigned to every chemical substance described in the open scientific literature. This number, typically comprising up to ten …

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.

Dec 1, 2025 · Chemical Abstracts Service (CAS) has a registry system for all completely identified chemical compounds or substances. There are over 144 million chemical substances & sequences …