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 resource …

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 …

Redistribution rights for CAS registry numbers are reserved by the American Chemical Society. “CAS registry” is a registered trademark of the American Chemical society.

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Oct 8, 2024 · 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 digits, serves as a universal …

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.

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Dec 3, 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 …

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