Chemistry

The fastest and most reliable way to find information about a compound in a resource is to use the Chemical Abstracts Service Registry Number (CASRN). This is like a social security number for compounds and is often used as an indexing tool in many chemistry resources. Look for it as a series of three numbers, often inside of square brackets:  [XXXX-XX-X].

To lookup a compound's CASRN, search one of the below resources using the compound's name.