Toxicant
A toxicant is any toxic substance.
Toxicants can be poisonous, can be may be man-made or naturally occurring, and can be found in the air, soil, water, or food.
Toxins are poisonous substances that are specific products of the metabolic activities of a living organism.
Poison is a substance that through its chemical action can kill, injure, or impair an organism.
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