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)).
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rdf:type | |
rdfs:subClassOf | |
isPartOf | |
schema:source | |
rdfs:label |
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rdfs:comment |
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is domainIncludes of |