{"@context":"https://schema.org","@type":"Class","@id":"https://schema.org/ChemicalSubstance","rdfs:label":"ChemicalSubstance","rdfs:comment":"A chemical substance is 'a portion of matter of constant composition, composed of molecular entities of the same type or of different types' (source: [ChEBI:59999](https://www.ebi.ac.uk/chebi/searchId.do?chebiId=59999)).","rdfs:subClassOf":[{"@id":"https://schema.org/BioChemEntity"}],"schema:properties":["chemicalComposition","chemicalRole","potentialUse"],"schema:subTypes":[],"schema:isPartOf":{"@id":"https://pending.schema.org"}}