ChemicalSubstance
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)).
domainIncludes
ChemicalSubstance
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)).
type
comment
A chemical substance is 'a por ...... i/searchId.do?chebiId=59999)).
label
ChemicalSubstance