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

6 days ago · CAS is a division of the American Chemical Society that provides products and services that help empower scientific discoveries. Check out our latest product, SciFinder-n, to see how you …

The CAS Institute, or iCAS, is a subsidiary of the Casualty Actuarial Society offering new credentials and specialized professional education for quantitative professionals.

A CAS Registry Number[1] (also referred to as CAS RN[2] or informally CAS Number) is a unique identification number, assigned by the Chemical Abstracts Service (CAS) in the US to every …

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

The CAS (Court of Arbitration for Sport) is an independent institution, based in Lausanne, involved in resolving legal disputes in the field of sport through arbitration and mediation. The CAS jurisdiction is …

PubChem is the world's largest collection of freely accessible chemical information. Search chemicals by name, molecular formula, structure, and other identifiers. Find chemical and physical properties, …

CAS provides prompt, personal service and tailored solutions to clients of all sizes. We are committed to building long-term relationships through dependable service, clear communication, and genuine …

Mar 9, 2026 · CAS numbers give every chemical substance a unique identifier. Here’s how they work and why they matter in labs, databases, and everyday products.