Database Counter

In addition to organic and inorganic substances, REGISTRY has:

67,678,691 sequences

CAS RN 2230939-58-7 is the most recent CAS Registry Number

CAS also provides specialized databases of chemical reactions, regulated chemicals, commercially available chemicals and Markush substance information.

Specialized Substance Collections Count

CASREACT(1) 108,669,083 Single and multi-step reactions, and synthetic preparations

CHEMLIST 388,997 Inventoried/regulated substances

CHEMCATS Commercially available chemicals

MARPAT 1,201,629 Searchable Markush structures

(1) More information on CASREACT statistics.