Translation

有毒な / 毒性のある / 有害な

Meaning

Toxic means poisonous or seriously harmful to living things. It is common in safety labels, medicine, chemistry, and environmental news. Do not use it as a casual synonym for merely bad when precision matters.

Examples

• その化学物質は魚に有毒です。
  The chemical is toxic to fish.
• 煙には有毒ガスが含まれていました。
  The smoke contained toxic gases.