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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.

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

Chemsrc provides fast access to over millions CAS#/CAS Number Database, including structure, MSDS, melting point, boiling point, density, etc.

Jun 14, 2007 · “Chemical Abstracts Service (CAS)” commemorative booklet produced by the National Historic Chemical Landmarks program of the American Chemical Society in 2007 (PDF). The …

Our History: Founded in 1907 as a volunteer effort to organize published chemistry research, CAS officially became a self-supporting division of the American Chemical Society in 1956.

Dec 16, 2025 · You can also identify your substance of interest by its CAS Registry Number®, which is universally used to provide a unique, unmistakable identifier for chemical substances.

Dec 22, 2025 · CAS builds the world’s largest collection of human-curated scientific knowledge covering over 150 years of published science. Our tools are designed to address the challenges and …

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 …

6 days ago · CAS registry numbers are used for searching chemical databases. The size of the registry is immense, with over 32 million substances and 59 million sequences. It identifies every chemical …