Name | chlorpyrifos |
Synonyms | ISO BSI ANSI Eradex OMS 971 DURSBAN Lorsban Dowco179 ENT27311 DOWCO 179 DURSBAN(R) dursban hf Clorpyrifos CHLORPYRIFOS chlorpyrifos Chlorpyritos Chlorpyriphos Trichlorpyrphos chlorpyrifos-ethyl O,O-diethyl O-3,5,6-trichloro-2-pyridyl phosphorothioate O,O-diethyl S-(3,5,6-trichloropyridin-2-yl) thiophosphate O,O-diethyl-O-(3,5,6-trichloro-2-pyridyl)phos-phorothioate O,O-diethyl O-(3,5,6-trichloropyridin-2-yl) phosphorothioate Phosphorothioic acid O,O-diethyl O-(3,5,6-trichloro-2-pyridinyl) ester |
CAS | 2921-88-2 |
EINECS | 220-864-4 |
InChI | InChI=1/C9H11Cl3NO3PS/c1-3-15-17(14,16-4-2)18-9-7(11)5-6(10)8(12)13-9/h5H,3-4H2,1-2H3 |
InChIKey | SBPBAQFWLVIOKP-UHFFFAOYSA-N |
Molecular Formula | C9H11Cl3NO3PS |
Molar Mass | 350.59 |
Density | 1.398 |
Melting Point | 42-44°C |
Boling Point | 200°C |
Flash Point | 2°C |
Water Solubility | Insoluble. 0.00013 g/100 mL |
Solubility | (At 25 °): 6.5, 7.9, 6.3, and 0.45 kg/kg in acetone, benzene, chloroform, and methanol, respectively(Worthing and Hance, 1991) |
Vapor Presure | 5.03 x 10-5 mmHg at 25 °C (subcooled liquid vapor pressure calculated from GC retention time data,Hinckley et al., 1990) |
Appearance | solid |
Exposure Limit | OSHA PEL: TWA 0.2 mg/m3, STEL 0.6 mg/m3; ACGIH TLV: TWA0.2 mg/m3, STEL 0.6 mg/m3 |
Merck | 13,2208 |
BRN | 1545756 |
pKa | -5.28±0.10(Predicted) |
Storage Condition | APPROX 4°C |
Stability | Stable. Incompatible with strong oxidizing agents. |
Refractive Index | 1.56 |
MDL | MFCD00041800 |
Physical and Chemical Properties | The original drug is white granular Crystal, stable at room temperature, with thiol odor, density 1.398(43.5 ℃), melting point 41.5~43.5 ℃, vapor pressure 2.5mPa(25 ℃), water solubility of 1.2mg/L, soluble in most organic solvents. |
Use | Is a phosphorothioate insecticide, with contact, stomach poison and fumigation effect. In the leaves of the late period is not long, but in the soil is longer, so the control effect of underground pests is better. At the recommended dose, no phytotoxicity to most crops, but sensitivity to tobacco |
Risk Codes | R25 - Toxic if swallowed R50/53 - Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. R36 - Irritating to the eyes R20/21/22 - Harmful by inhalation, in contact with skin and if swallowed. R11 - Highly Flammable R38 - Irritating to the skin |
Safety Description | S1/2 - Keep locked up and out of the reach of children. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S60 - This material and its container must be disposed of as hazardous waste. S61 - Avoid release to the environment. Refer to special instructions / safety data sheets. S36/37 - Wear suitable protective clothing and gloves. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S16 - Keep away from sources of ignition. |
UN IDs | UN 2783 |
WGK Germany | 3 |
RTECS | TF6300000 |
HS Code | 29333990 |
Hazard Class | 6.1(b) |
Packing Group | III |
Toxicity | LD50 orally in rats: 145 mg/kg (Schafer) |
The original drug is white granular Crystal, stable at room temperature, with thiol odor. Water solubility of 2mL/L, soluble in iso-octane, methanol and other organic solvents. Stable under general storage conditions, stable in acidic medium, easy to decompose in alkaline medium, corrosive to copper and brass.
pentachloropyridine is obtained by chlorination of pyridine in the presence of a catalyst. Then with acetonitrile as solvent, at a certain temperature slowly drop add zinc powder/ammonium chloride aqueous solution, the reaction of 2,3,5,6 A four chloropyridine, after alkaline hydrolysis, 2 a hydroxyl group 3,5. 6-chloropyridine. This compound is reacted with 0.O-diethyl thiophosphoryl chloride and treated to obtain chlorpyrifos.
non-systemic, broad-spectrum insecticide with exposure, gastric toxicity and fumigation effects. For corn, cotton, soybean, peanut, sugar beet, fruit trees, vegetables and other crops. Control of mosquitoes, flies, cockroaches, termites and other domestic pests, granary pests and livestock ectoparasites. Generally processed into emulsifiable concentrates or granules. Can be mixed with non-alkaline pesticides.
The acute oral LD50 of male rats was 163mg/kg, the acute oral LD50 of female rats was 135mg/kg, the guinea pig was 500mg/kg, and the rabbit percutaneous LD50 was 2000mg/kg. It is highly toxic to bees, and toxic to prawn and fish. The maximum allowable concentration of indoor air is 0.2 mg/m3. The maximum allowable residue on citrus was 0. 3 mg/kg, 0.05mg/kg in cottonseed and cottonseed oil, 0.1 mg/kg in rice, and 0. 1 mg/kg in cabbage and lettuce.