Founded in 1914, the cas is the world’s only actuarial organization focused exclusively on property and casualty risks and serves over 11,000 members worldwide. Cas registry®, the cas substance collection, is the premier source relied upon by scientists and regulators worldwide for accurate information on chemical substances. Quickly confirm chemical names, cas registry numbers®, structures or basic physical properties by searching compounds of general interest or leveraging an api connection.

Learn how cas can facilitate your research and drive innovation. 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. If you are a current cas member, candidate, student central member or have ever had a cas account in our previous portal, please use the button below to access our new system.

Redistribution rights for cas registry numbers are reserved by the american chemical society. If you are a current cas member, candidate, student central member or have ever had a cas account in our previous portal, please use the button below to access our new system.