noun
toxic substance; poisonous substance
A formal or technical term for any material that is toxic or poisonous. Used in scientific, medical, and regulatory contexts.
この工場では毒性物質の取り扱いに厳しい規則がある。
This factory has strict rules for handling toxic substances.
毒性物質が環境に与える影響を調査している。
They are investigating the impact of toxic substances on the environment.
Compound of 毒性 (toxicity) + 物質 (substance, matter).