Chlopyrifos Product Name Chlopyrifos Chemical Name O,O-diethyl O-(3,5,6-trichloro- ... -2 Molecular Weight 350.5 Formulation 97%TC, 480g/L EC Applications Chlorpyrifos is a broad spectrum insecticide, a chemical used ... , cockroaches, grubs, flea beetles, flies, termites, fire ants, and lice. Chlopyrifos 48% EC