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Common NameSulfotep
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中文通用名治螟磷
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IUPACO,O,O′,O′-tetraethyl dithiopyrophosphate
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CASthiodiphosphoric acid ([(HO)2P(S)]2O) tetraethyl ester
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CAS No.3689-24-5
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Molecular FormulaC8H20O5P2S2
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Molecular Structure
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Category
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ActivityFumigant, Insecticide, acaricide
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Physical PropertiesMolecular weight:322.3; Physical form:Pale yellow liquid. Density:1.196 (20 °C); Flash point:102 °C; Vapour pressure:14 mPa (20 °C); Henry constant:4.5 × 10-1 Pa m3 mol-1 (20 °C); Partition coefficient(n-octanol and water):logP = 3.99 (20 °C); Solubility:In water 10 mg/l (20 °C). Miscible with most organic solvents. Sparingly soluble in ligroin and petroleum ether.; Stability:Relatively slowly hydrolysed; DT50 (est.) 10.7 d ( pH 4), 8.2 d ( pH 7), 9.1 d ( pH 9) (22 °C).;
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ToxicologyOral:Acute oral LD50 for rats c. 10 mg/kg. Percutaneous:Acute percutaneous LD50 (7 d) for rats 65 mg/kg; (4 h) for rats 262 mg/kg. Not irritating to eyes and skin (rabbits). Inhalation: LC50 (4 h) for rats c. 0.05 mg/l air (aerosol). Phytotoxicity:Phytotoxic to some ornamentals, e.g. chrysanthemums, orchids, and some rose varieties. ADI:0.24 mg/kg.
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Environmental ProfileEcotoxicology:
Algae: ErC50 for Scenedesmus subspicatus 7.2 mg/l.Bees:No data; only used as a glasshouse fumigant.Birds:No data; only used as a glasshouse fumigant.Daphnia: LC50 (48 h) 0.002 mg/l.Fish: LC50 (96 h) for golden orfe 0.071, rainbow trout 0.00361 mg/l.
Environmental fate:
Animals:Orally administered sulfotep was absorbed relatively quickly by rats. Elimination took place quickly via the kidney. The main elimination product is the diethylthiophosphate.Soil:Koc value and leaching studies indicate that sulfotep can be classified as immobile. Degraded quickly in different soils. Monothiotep and tetraethylpyrophosphate were very short-lived intermediate products which were degraded tPlant:Major metabolites are monothiotep, tetraethylpyrophosphate, diethylthiophosphoric acid and diethylphosphoric acid. -
Transport InformationHazard Class:Ia(Extremely hazardous)
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