What is CAS?

What is CAS?

• A. The 2010 chemical abstract system registry that lists over 113 million chemicals
• B. A safety procedure for hazmat incidents
• C. A federal law for emergency planning
• D. A type of hazardous material

Answer: (A)

CAS is the Chemical Abstracts Service registry—a centralized database that assigns a unique CAS Registry Number to each chemical substance. This lets you identify a chemical precisely, even if it has multiple common names. By 2010, the CAS registry listed information on over 113 million chemicals, which means responders can quickly look up hazard data, properties, and safety information tied to that single identifier. This helps determine appropriate containment, PPE, and response actions. It’s not a safety procedure, a law, or a type of hazardous material; it’s a comprehensive catalog used for accurate chemical identification.

CAS is the Chemical Abstracts Service registry—a centralized database that assigns a unique CAS Registry Number to each chemical substance. This lets you identify a chemical precisely, even if it has multiple common names. By 2010, the CAS registry listed information on over 113 million chemicals, which means responders can quickly look up hazard data, properties, and safety information tied to that single identifier. This helps determine appropriate containment, PPE, and response actions. It’s not a safety procedure, a law, or a type of hazardous material; it’s a comprehensive catalog used for accurate chemical identification.