This Toolforge instance of Scholia currently only has access to part of the data.
There will be changes in the week of January 20th 2026
regarding the WDQS graph split and sunsetting of the legacy service.
There is a qlever.scholia.wiki mirror running with
QLever as backend with the full Wikidata content.
This mirror is part of an evaluation of alternatives to Blazegraph.
Chemical substances
Examples
Single items
- aspirin
- View information about the painkiller aspirin.
- benzene
- View information about the chemical benzene.
- citric acid
- View information about the chemical citric acid.
- L-proline
- View information about the natural amino acid L-proline
- LSD
- View information about the drug LSD.
Redirecting
If you know the identifier, then Scholia can make a lookup based on the identifier:
- pubchem/14123361
- Look up PubChem CID 14123361. This will identify tetra-tert-butylmethane and redirect to its Scholia page.
- cas/50-00-0
- Look up CAS 50-00-0. This will identify formaldehyde and redirect to its Scholia page.
- inchikey/QTBSBXVTEAMEQO-UHFFFAOYSA-N
- Redirect also works for InChIKeys, here for acetic acid.
- lipidmaps/LMFA00000007
- And for LIPID MAPS identifiers
ChemCuration
There is always more information about chemicals that can be added. This section adds some useful resource for chemistry curation:
- PubChem CID violations
- This page shows CIDs linked to more than one Wikidata item (a "Unique value" violation) and Wikidata items with more than one CID ("Single value" violations).
- Curation of physicochemical properties
- This page shows lists of compounds with missing or incomplete information regarding propephysicochemical properties, like boiling points.