CAS - Chemical Abstracts Service - Database Counter...

In addition to organic and inorganic substances, REGISTRY has:
69,523,534 sequences
CAS RN 2777112-29-3 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® 146,182,956 Single and multi-step reactions, and synthetic preparations
CHEMLIST® 417,385 Inventoried/regulated substances
CHEMCATS® Commercially available chemicals
MARPAT® 1,373,565 Searchable Markush structures