ToxicSubstance | A BiologicallyActiveSubstance of concern because of its potentially hazardous or toxic effects. This would include most drugs of abuse, as well as agents that require special handling because of their toxicity. Most pharmaceutical agents, although potentially harmful, are excluded here and are assigned to the sibling Class PharmacologicSubstance | BiologicallyActiveSubstance | (=> (instance ?ORGANISM ToxicOrganism) (exists (?SUBSTANCE) (and (instance ?SUBSTANCE ToxicSubstance) (part ?SUBSTANCE ?ORGANISM))))
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