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Chemical Identification
Common Name
Phenthoate
中文通用名
稻丰散
IUPAC
S-α-ethoxycarbonylbenzyl O,O-dimethyl phosphorodithioate
or
ethyl dimethoxyphosphinothioylthio(phenyl)acetate
CAS
ethyl α-[(dimethoxyphosphinothioyl)thio]benzeneacetate
CAS No.
2597-03-7
Molecular Formula
C12H17O4PS2
Molecular Structure
Category
Activity
Insecticide, acaricide
Premix
Cypermethrin+phenthoate
Fenobucarb+phenthoate
Phenthoate+Buprofezin
Abamectin+Phenthoate
Phenthoate+Emamectin benzoate
Emulsifiable concentrate, wettable powder, oil solution, dust, granules. 
Premix Parters: chlorpyrifos; cypermethrin;
Physical Properties
Molecular weight:320.4; Physical form:Colourless crystals; ( tech., reddish-yellow liquid). Density:1.226 (20 °C); Melting point:17-18 °C; Flash point:165-170 °C; Vapour pressure:5.3 mPa (40 °C); Partition coefficient(n-octanol and water):logP = 3.69; Solubility:In water 10 mg/l (25 °C). Readily soluble in methanol, ethanol, acetone, hexane, xylene, benzene, carbon disulfide, chloroform, methylene dichloride, acetonitrile, tetrahydrofuran; in n-hexane 116, kerosene 340 (both in g/l, 25 °; Stability:Decomposes 180 °C. In water, stable under neutral and acidic conditions; degrades under alkaline conditions.
Toxicology
Oral:Acute oral LD50 for male rats 270, female rats 249, mice 350, dogs >500, guinea pigs 377, rabbits 72 mg/ kg. Percutaneous:Acute percutaneous LD50 for rats >5000, male mice 2620 mg/kg. Non-irritating to skin and eyes (rabbits). Not a skin sensitiser (guinea pigs). Inhalation:LC50 (4 h) for rats 3.17 mg/l air. Phytotoxicity:Phytotoxic to some varieties of grape, fig, and peach, and red-skinned varieties of apple. ADI:( JMPR) 0.07 mg/ kg b.w. (for d
Environmental Profile
Ecotoxicology: 
Bees:Toxic to bees. LD50 0.306 mg/bee.Birds:Acute oral LD50 for pheasants 218, quail 300 mg/ kg.Fish: TLm (48 h) for carp 2.5, goldfish 2.4 ppm. 

Environmental fate: 
Animals:In mammals, phenthoate is degraded with almost equal facility by hydrolysis of the carboethoxy moiety, cleavage of the P-S or C-S bond and removal of the methoxy group by either direct demethylation or hydrolytic cleavage of the P-O bond. The following meSoil: DT50 ?/SYM>1 d in both upland and submerged soil. The degradation product is phenthoate acid.Plant:In plants, there is oxidation to the phosphorothioate, followed by hydrolysis. Phosphoric acid, dimethyl and monomethyl phosphate have been identified as metabolites. WATER SOLUBILITY: Soluble, 0.02% at 20°C HAZARDS: Fish: LC100 4.5 mg/l (goldfish). Bee: Toxic
Transport Information
Signal Word:WARNING; Hazard Class:II(Moderately hazardous)

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