Warnings, Caveats and Weasel Words

Most of the experiments linked to here are running on R&D equipment in a non-production environment. They may disappear without warning and/or perform erratically. If one of them isn’t working for some reason, come back later and try again.

InChI Lookup

 2 minute read.

Note: This experiment has been retired. This description has been kept for reference, but many of the links and/or services that appear below no longer work.

The idea is to create a mechanism that would allow Crossref publishers to record InChIs in their submitted Crossref metadata. This, in turn, would allow us to provide a service that would allow users to:

  • Lookup the published articles that mention a particular InChI.
  • Lookup the InChIs mentioned in a published article.

Similar services could, conceivably, be provided for other types of semantic metadata.

The following is a demonstrator of what an DOI2InChI lookup service might look like. Please note that the XML representation of the results is very basic and is not best-practice for linked-data.

The demonstrator currently only holds DOIs and InChIs for a few publishers. A summary of the contents of the database can be found on the status page


A list of all the Crossref DOIs that contain InChIs can be seen here:


A list of all the InChIs that have been registered with Crossref can be seen here:


The system provides the following API calls:

Return all the DOIs that have been registered with a given InChI


Return all the InChIs that have been registered for a given DOI


Last modified: 2018-02-09.