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
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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
Metaregistry InChIKey

The metaregistry provides mappings between the Bioregistry and other registries. There are 4 mappings to external registries for inchikey with 2 unique external prefixes.

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

Providers are various services that resolve CURIEs to URLs. The example CURIE inchikey:RYYVLZVUVIJVGH-UHFFFAOYSA-N is used to demonstrate the provides available for inchikey. Generation of OLS and BioPortal URLs requires additional programmatic logic beyond string formatting.

Name Metaprefix URI
InChIKey inchikey http://www.chemspider.com/inchikey=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
None scholia https://scholia.toolforge.org/inchikey/RYYVLZVUVIJVGH-UHFFFAOYSA-N
None scholia https://scholia.toolforge.org/inchikey/RYYVLZVUVIJVGH-UHFFFAOYSA-N
Extra Providers

Additional providers curated in the Bioregistry are listed here.

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