What Is a CAS Number in MSDS?
Material safety data sheets (MSDS) are used in the workplace to provide essential information on the safe use and disposal of chemicals and mixtures. Typically, standard MSDS contain 16 sections in which vital information on a product’s identity, hazards and properties are described. Chemical Identity In order to communicate about chemicals in a standardized way, much of the world uses a standardized numerical identifiers called CAS registry numbers (RNs), instead of chemical names. CAS CAS, or Chemical Abstracts Service, a division of the American Chemical Society, assigns unique CAS numbers to individual chemicals. Generally, there is one specific CAS number for each chemical. Format CAS RNs always take the form of a code segmented into three sections separated by dashes. The first section contains at least two digits, the second section always contains two digits and the third section always contains one digit. Generally, a CAS RN would look like: [string of digits]-XX-X. For exampl
