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Registry Lookups

Exact computer match of chemical name or CAS Registry Number!

CAS Client Services staff has the capability to search for and confirm CAS Registry Numbers for millions of substances. Submit your request and receive the substance identification information you need within 24 hours (excluding weekends and holidays).

All requests are kept strictly confidential.

Please submit the Registry Lookups Order Form by fax to expedite processing.

For more information, including prices, you may contact CAS Client Services in any of the following ways:

• Phone: 800-631-1884
• Phone: 614-447-3870
• Fax: 614-447-3747
• E-mail: answers@cas.org