parathion

A poisonous yellowish liquid organophosphate compound, C₁₀H₁₄NO₅PS, used as an insecticide. Its use in the United States is highly restricted.

O,O-Diethyl-O-4-nitro-phenylthiophosphate, a powerful, dangerously toxic insecticide.

a colorless and odorless toxic oil used as an insecticide