realized in realized in characteristic of molecular entity creating a mixture of molecules in solution reactant role solvent role PMID: 18373502.Transfusion. 2008 Mar 25. Solvent/detergent treatment of platelet concentrates enhances the release of growth factors. adpated from wikipedia (http://en.wikipedia.org/wiki/Solvatation) Philippe Rocca-Serra The class CHEBI:solvent is logically equivalent to this class, iff it is properly subsumed under the BFO:role branch. The label and textual definition of this CHEBI class are however misleadingly denoting the material entity that bears this role and not the role itself. The OBI modeling was needed as what is considered a solvent in a mixture can depend on the intent of the person creating the mixture. It would be great if this could be dealt with in CHEBI itself. See also https://github.com/obi-ontology/obi/issues/1771. solvent role solvent role is a role which inheres in a molecular entity capable of ensuring the dissolution of another chemical entity and realized by the process of solvation pending final vetting