noun
deleterious substance; toxic substance
A legal classification under Japan's Poisonous and Deleterious Substances Control Act; less toxic than 毒物 (poisonous substance).
この薬品は劇物に指定されている。
This chemical is designated as a deleterious substance.
劇物は毒物より毒性が低いが、取り扱いには注意が必要だ。
Deleterious substances are less toxic than poisonous substances, but they still require careful handling.