CAS Client Services

CAS Client Services can assist you in the assignment of CAS Registry Numbers® and CA Index Names.

  • To obtain CA Index Names and assign CAS Registry Numbers for regulatory chemicals to be included on PreManufacture  Notification (PMN) submissions to the U.S. EPA, go to the Inventory Expert Service.  
  • For substance information identification via CAS Registry Number assignment and CA Index Name generation, go to Chemist Consultation
  • For simple exact match requests for chemical names or CAS Registry Numbers, ask about the Registry Lookup Service.

Contact Us

For more information and instructions, including prices, contact us in any of the following ways:

Phone: 800-631-1884 (North America)
Phone: 614-447-3870


Contact CAS

Let us know how we can best serve you.