CAS No.: 2921-88-2
Molecular Formula: C9H11Cl3NO3PS
Molecular Weight: 350.59
Melting point |
42–44 °C |
Boiling point |
200 °C |
Density |
1.398 |
Vapor pressure |
5.03 x 10-5 mmHg at 25 °C (subcooled liquid vapor pressure calculated from GC retention time data; Hinckley et al., 1990) |
Flash point |
2 °C |
Storage temperature |
Approx. 4 °C |
Solubility |
At 25 °C: 6.5, 7.9, 6.3, and 0.45 kg/kg in acetone, benzene, chloroform, and methanol, respectively (Worthing and Hance, 1991) |
pKa |
-5.28 ± 0.10 (Predicted) |
Form |
Solid |
Color |
White to off-white |
Water solubility |
Insoluble; 0.00013 g/100 mL |
Stability |
Stable. Incompatible with strong oxidizing agents. |
Symbol (GHS) |
|
Signal word |
Danger |
Hazard codes |
T; N, N, T, Xn, F, Xi |
RIDADR |
UN 2783 |
Hazard class |
6.1 (b) |
Packing group |
III |
HS code |
29333990 |
Chlorpyrifos is a crystalline organophosphate insecticide, acaricide, and miticide used primarily to control foliage and soil-borne insect pests in a wide range of food and feed crops. It is widely used worldwide to control pest insects in agricultural, residential, and commercial settings. The largest share of use is in corn. It can also be applied to other crops and vegetables, including soybeans, fruit and nut trees, cranberries, broccoli, and cauliflower. Non-agricultural applications include golf courses, turf areas, greenhouses, and non-structural wood treatment. Chlorpyrifos can also be used as a mosquito adulticide and in roach baits in child-resistant packaging. Its mode of action involves suppressing the insect nervous system by inhibiting acetylcholinesterase.
Chlorpyrifos belongs to the organophosphate class of insecticides. Technical chlorpyrifos is an amber-to-white crystalline solid with a mild sulfur odor. It is insoluble in water, but soluble in benzene, acetone, chloroform, carbon disulfide, diethyl ether, xylene, methylene chloride, and methanol. Chlorpyrifos formulations include emulsifiable concentrates, dust, granular wettable powder, microcapsules, pellets, and sprays. Chlorpyrifos is widely used as an active ingredient in many commercial insecticides, such as Dursban and Lorsban, to control household pests, mosquitoes, and other pests. Formulations include emulsifiable concentrates, granules, wettable powders, dust, microcapsules, pellets, and sprays.