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- CAS REGISTRY®
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 with nearly 500,000 chemical substances from CAS REGISTRY
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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 nomenclatures and disciplines used by branches of science, industry, and regulatory bodies
- CAS Number Search - NIST Chemistry WebBook
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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Quickly confirm chemical names, CAS Registry Numbers®, structures or basic physical properties by searching compounds of general interest or leveraging an API connection
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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 complexities unique to scientific and patent data so that you can find the answers you need efficiently
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