CAS Client Services is a fee-based service that offers you several options for confirming and assigning CAS Registry Numbers (often referred to as CAS RNs or CAS Numbers) and obtaining CA Index Names.

Inventory Expert Service

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.

• Inventory Expert Service
  
• Inventory Expert Service Order Form

Chemist Consultation - Substance Identification

For substance information identification via CAS Registry Number assignment and CA Index Name generation

• Chemist Consultation - Substance Identification
  
• Chemist Consultation - Substance Identification Order Form

Registry Lookups

For confirmation of chemical names or assignment of existing CAS Registry Numbers

• Registry Lookups
• Registry Lookups Order Form

Computer Readable Services

For identifying large numbers of chemical substances including assignment of existing CAS Registry Numbers and retrieval of CA Index Names and CAS synonyms

• Computer Readable Services
  
• Computer Readable Services Order Form

Contact CAS Client Services

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