A CAS Number (Chemical Abstracts Service Number) is a unique numerical identifier assigned to every chemical substance described in the open scientific literature. Here are some key points about CAS Numbers:
Purpose: They provide a unique and unambiguous identifier for chemical substances, making it easier to communicate and retrieve information about them .
Format: A CAS Number is divided into three parts by hyphens. For example, the CAS Number for caffeine is 58-08-2 2.
Assignment: CAS Numbers are assigned sequentially as new substances are identified and added to the CAS Registry database.
