material produced by or used in a reaction involving changes in atoms or molecules

a very poisonous metallic element that has three allotropic forms; arsenic and arsenic compounds are used as herbicides and insecticides and various alloys; found in arsenopyrite and orpiment and realgar

a herbicide used in the Vietnam War to defoliate forest areas

a synthetic compound derived from triazine that is widely used as an agricultural herbicide

a herbicide that kills weeds without harming vegetables

a poisonous yellow solid used in solution as a herbicide

a herbicide that is effective in controlling woody plants but is toxic to animals

a very poisonous metallic element that has three allotropic forms; arsenic and arsenic compounds are used as herbicides and insecticides and various alloys; found in arsenopyrite and orpiment and realgar