Chlorpyrifos 97% TC, 480g/L EC Other Name O,O-diethyl O-3,5,6-trichloro-2-pyridyl phosphorothioate Molecular Formula C9H11Cl3NO3PS Molecular Weight 350.5863 CAS NO. 2921-88-2 Physical & Chemical natures Chlorpyrifos technical is light yellow or white granule, stable under room temperature. Customized packing available