toxic electromagnet are poisonous
poisonous_gas is toxic_substance. potassium_nitrite is not toxic_substance. arsenic is toxic_substance. poisonous_gas is not toxic_substance. copper_sulfate is not toxic_substance. potassium_nitrite is toxic_substance. baneberry is poisonous_plant. poison_ivy is poisonous_plant. copper_sulfate is toxic_substance. arsenic is not toxic_substance.