CAS (Chemical Abstracts Service) is a division of the American Chemical Society and is the producer of comprehensive databases of chemical information.

Prefix

cas

Alternative Prefixes

CAS_RN cas_id SECONDARY_CAS_RN CASID

Keywords

chemical chemical entity physical chemistry structure

Links

Homepage

Contact

Andrea Jacobs   0000-0001-9316-9400

Pattern for Local Unique Identifiers

Local identifiers in CAS Registry Number should match this regular expression:
^\d{1,7}\-\d{2}\-\d$

Example Local Unique Identifier

50-00-0   Resolve

Pattern for CURIES

Compact URIs (CURIEs) constructed from CAS Registry Number should match this regular expression:
^cas:\d{1,7}\-\d{2}\-\d$

Example CURIE

cas:50-00-0

Publications

2022 CAS Common Chemistry in 2021: Expanding Access to Trusted Chemical Information for the Scientific Community

The metaregistry provides mappings between the Bioregistry and other registries. There are 10 mappings to external registries for this resource with 6 unique external prefixes.

A provider turns a local unique identifiers from a resource into a URI. Many providers are also resolvable as URLs (i.e., they can be used in a web browser).

The local unique identifier 50-00-0 is used to demonstrate the providers available for CAS Registry Number. Some providers may use a different example, which is displayed in the table below. A guide for curating additional providers can be found here.

Additional providers curated in the Bioregistry are listed here. These are typically inherited from Identifiers.org or Prefix Commons, and need extra curation.