Phenthoate

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Chemical Identification | General Product Information | Physical & Safety Data

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

General Product Information

Category

Insecticides > Organophosphorus insecticides

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 & Safety Data

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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