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• Chemist Consultation - Substance Identification
• Registry Lookups
• Computer Readable Services
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CAS Client Services^SM

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

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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 Home
• Inventory Expert Service Order Form

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Chemist Consultation - Substance Identification

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

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

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Registry Lookups

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

• Registry Lookups Home
• Registry Lookups Order Form

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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 Home
• Computer Readable Services Order Form

For more information, including prices, 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
• CAS Client Services vCard