CAS Common Chemistry in 2021: Expanding Access to Trusted Chemical Information for the Scientific Community

CAS Common Chemistry
(https://commonchemistry.cas.org/) is an open web resource that
provides access to reliable chemical substance information for the
scientific community. Having served millions of visitors since its
creation in 2009, the resource was extensively updated in 2021 with
significant enhancements. The underlying dataset was expanded from
8000 to 500,000 chemical substances and includes additional associated
information, such as basic properties and computer-readable chemical
structure information. New use cases are supported with enhanced search
capabilities and an integrated application programming interface.
Reusable licensing of the content is provided through a Creative Commons
Attribution-Non-Commercial (CC-BY-NC 4.0) license allowing other public
resources to integrate the data into their systems. This paper provides
an overview of the enhancements to data and functionality, discusses
the benefits of the contribution to the chemistry community, and summarizes
recent progress in leveraging this resource to strengthen other information
sources.