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

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 …

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

CAS numbers are unique numbers assigned to chemical substances by the Chemical Abstract Service to provide a consistent and reliable way of identifying the chemical substances.

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 1, 2025 · Chemical Abstracts Service (CAS) has a registry system for all completely identified chemical compounds or substances. There are over 144 million chemical substances & …

CASA was founded in 1977, when a Seattle superior court judge, amidst an overwhelmed child welfare system, grew concerned about making decisions on behalf of child victims of abuse or …

CAS provides solutions and services that help empower scientific discoveries. Learn how CAS can facilitate your research and drive innovation.

Texas CASA is a registered 501 (c) (3) non-profit. Texas CASA's EIN is 75-2252358.

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.