In addition to organic and inorganic substances, REGISTRY has:

72,416,598 sequences

CAS RN 3147848-18-5 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⁾ 166,922,829 Single and multi-step reactions, and synthetic preparations

CHEMLIST 417,385 Inventoried/regulated substances

CHEMCATS Commercially available chemicals

MARPAT 1,537,276 Searchable Markush structures

^{(1) More information on CASREACT statistics.}