Chlorpyrifos is a broad-spectrum organophosphate insecticide.Chlorpyrifos is effective in controlling cutworms, corn rootworms, cockroaches, grubs, flea beetles, flies, termites, fire ants, and lice. It is used as an insecticide on grain, cotton, field, fruit, nut and vegetable crops, and well as on lawns and ornamental plants. It is also registered for direct use on animals for control of parasites. It can be used as Termiticide for the control of Termites. Chlorpyrifos acts on pests primarily as a contact poison, with some action as a stomach poison. It is available as granules, wettable powder, dustable powder and emulsifiable concentrate.

Physical and Chemical Properties Product Name Chlorpyrifos Technical Purity 94.00% Min Sulfotep 0.30% Max Acetone Insoluble In acetone 0.50% Max Acidity 0.10% Max as H2SO4 Chemical Family Organophosphate IUPAC Name O,O-diethyl-O-3,5,6-trichloro-2-pyridl phosphorothioate CAS No [2921-88-2] Empirical Formula C9H11Cl3NO3PS Structural Formula Molecular Weight 350.6 Appearance Colorless crystals Odour Mercaptane Odor Melting Point 42-43°C Specific Gravity 1.44 at 20°C Vapour Pressure 2.7 mPa (25°C) Solubility In water 1.4 mg/lit at 25 oC. Benzene: 7900, Acetone 6500, Chlorform 6300, Carbon disulfide 5900, diethyl ether 5100, xylene 5000, iso-octanol 790, methanol 450 (all in g/kg, 25°C) Stability Rate of hydrolysis increases with pH and in the presence of copper and possibility of other metals that can form chelates; DT 50 1.5 d to 100 d Toxicity Route Species LD50 Mg/Kg of B/w Oral Rat 135-163 Dermal Rabbit >5000 Antidote Atropine Packing 200 Ltr UN approved Drums Formulation Available 20%EC, 40% EC, 40.8% EC,48% EC and 50% EC

< Back to Technicals