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Chemical Identification
Common Name
Tetrachlorvinphos
中文通用名
杀虫威
IUPAC
(Z)-2-chloro-1-(2,4,5-trichlorophenyl)vinyl dimethyl phosphate
CAS
(1Z)-2-chloro-1-(2,4,5-trichlorophenyl)ethenyl dimethyl phosphate
CAS No.
22248-79-9
Molecular Formula
C10H9Cl4O4P
Molecular Structure
Physical Properties
Molecular weight:366.0; Physical form:Tech. is an off-white, crystalline solid. Composition:Tech. grade is typically 98% pure. Melting point:94-97 °C; Vapour pressure:0.0056 mPa (20 °C); Henry constant:1.86 × 10-4 Pa m3 mol-1 ( calc.); Solubility:In water 11 mg/l (20 °C). In acetone <200, chloroform, dichloromethane 400, xylene <150 (all in g/kg, 20 °C).; Stability:Stable <100 °C; slowly hydrolysed (50 °C), DT50 54 d ( pH 3), 44 d ( pH 7), 80 h ( pH 10.5).;
Toxicology
Oral:Acute oral LD50 for rats 4000-5000, mice 2500-5000 mg/kg. Percutaneous:Acute percutaneous LD50 for rabbits >2500 mg/kg. Phytotoxicity:Russetting may occur on Golden Delicious apples under certain conditions. ADI:0.027 mg/kg b.w.
Environmental Profile
Ecotoxicology: 
Bees:Toxic to bees.Birds:Acute oral LD50 for Chukar partridges and mallard ducks >2000 mg/kg, for various other birds 1500-2600 mg/kg.Fish:LC50 (24 h) for five different species 0.3-6.0 mg/l. 

Environmental fate: 
Animals:In mammals, rapid metabolism occurs, with elimination of the metabolites within a few days. Metabolites found in the urine of dogs and rats include 2,4,5-trichlorophenylethanediol glucuronide, further glucuronic acid derivatives, 2,4,5-trichloromandelic aSoil:For a review on metabolism and breakdown in plants, animals and soil, see K. I. Beynon et al., Residue Rev., 1973, 47, 55.
Transport Information
Signal Word:CAUTION; Hazard Class:III(Slightly hazardous)

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