Exact computer match of chemical name OR CAS Registry Number!

CAS Client Services staff has the capability to retrieve 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 e-mail as a .pdf or fax to expedite processing.

Contact CAS Client Services

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

Phone: 800-631-1884 (North America)
Phone: 614-447-3870
Fax: 614-447-3747
E-mail: answers@cas.org
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