Looking for CAS Registry Numbers or CA Index Names for known substances? For common and frequently regulated chemicals, you can use CAS Common Chemistry, an open community …

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 …

Chemsrc provides free CAS Number Search engine to fast access over millions chemical structures, CAS number, MSDS, properties and associated information.

Redistribution rights for CAS registry numbers are reserved by the American Chemical Society. “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.

The Chemical Abstracts Service (CAS) has developed a registry of unique numeric identifiers, aka CAS Numbers or CAS Registry Numbers, for more than 73 million organic and inorganic …

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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 3, 2025 · The CAS Content Collection now includes life sciences data curated by our expert scientists. Answer key drug discovery questions with structure-activity relationships, …