The IUPAC International Chemical Identifier (InChI, see MIR:00000383) is an identifier for chemical substances, and is derived solely from a structural representation of that substance. Since these can be quite unwieldly, particularly for web use, the InChIKey was developed. These are of a fixed length (25 character) and were created as a condensed, more web friendly, digital representation of the InChI.

Prefix
inchikey
Links
Homepage
Contact
Missing Contact
Pattern for Local Unique Identifiers

Local identifiers in InChIKey should match this regular expression:
^[A-Z]{14}\-[A-Z]{10}(\-[A-Z])?$

Example Local Unique Identifier
RYYVLZVUVIJVGH-UHFFFAOYSA-N   Resolve
Pattern for CURIES

Compact URIs (CURIEs) constructed from InChIKey should match this regular expression:
^inchikey:[A-Z]{14}\-[A-Z]{10}(\-[A-Z])?$

Example CURIE
inchikey:RYYVLZVUVIJVGH-UHFFFAOYSA-N
Ontology

A summary of the relations in the Bioregistry schema can be found here.

In Collection
Synapse.org external links
Metaregistry InChIKey

The metaregistry provides mappings between the Bioregistry and other registries. There are 5 mappings to external registries for this resource with 2 unique external prefixes.

Registry Name Registry Metaprefix External Prefix Curate
BioContext biocontext INCHIKEY
Identifiers.org Identifiers.org logo miriam inchikey
N2T Name-to-Thing logo n2t inchikey
TogoID togoid InchiKey
Wikidata Wikidata Property logo wikidata P235
Providers

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 RYYVLZVUVIJVGH-UHFFFAOYSA-N is used to demonstrate the providers available for InChIKey. Some providers may use a different example, which is displayed in the table below. A guide for curating additional providers can be found here.

Name Metaprefix URI
InChIKey inchikey https://www.chemspider.com/search?params=RYYVLZVUVIJVGH-UHFFFAOYSA-N
Bioregistry bioregistry https://bioregistry.io/inchikey:RYYVLZVUVIJVGH-UHFFFAOYSA-N
Identifiers.org miriam https://identifiers.org/inchikey:RYYVLZVUVIJVGH-UHFFFAOYSA-N
Name-to-Thing n2t https://n2t.net/inchikey:RYYVLZVUVIJVGH-UHFFFAOYSA-N
Extra Providers

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

Code Name URL
scholia Scholia https://scholia.toolforge.org/inchikey/RYYVLZVUVIJVGH-UHFFFAOYSA-N