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Chemical Identification
Common Name
Iprobenfos
中文通用名
异稻瘟净
IUPAC
S-benzyl O,O-diisopropyl phosphorothioate
CAS
O,O-bis(1-methylethyl) S-(phenylmethyl) phosphorothioate
CAS No.
26087-47-8
Molecular Formula
C13H21O3PS
Molecular Structure
Category
Activity
Fungicide
Premix
Emulsifiable concentrate, granule, dust. 
Premix Parters: pendimethalin;
Physical Properties
Molecular weight:288.3; Physical form:Colourless, transparent oil; ( tech., yellow oil). Density:1.103 (20 °C); Composition:Tech. is c. 94% pure. Vapour pressure:0.247 mPa (20 °C); Henry constant:1.66 × 10-4 Pa m3 mol-1 ( calc.); Partition coefficient(n-octanol and water):logP = 3.21; Solubility:In water 430 mg/l (20 °C). In acetone, acetonitrile, methanol, xylene >1 kg/l.; Stability: DT50 in water 7230-7793 h ( pH 4-9).
Toxicology
Oral:Acute oral LD50 for male rats 790, female rats 680, male mice 1830, female mice 1760 mg/ kg. Percutaneous:Acute percutaneous LD50 for mice 4000 mg/ kg. Inhalation: LC50 (4 h) for male rats 1.12, female rats 0.34 mg/l air. Phytotoxicity:Non-phytotoxic to rice. Injury has been noted on beans, soya beans and aubergines.
Environmental Profile
Ecotoxicology: 
Birds:Acute oral LD50 for cocks 705 mg/ kg.Fish: LC50 for carp 5.1 mg/l. 

Environmental fate: 
Animals:Three metabolites were identified in urine and faeces of rats.Soil: DT50 15 d (two soils). Koc 5030.Plant:For metabolism in plants, see H. Yamamoto et al. (Agric. Biol. Chem., 1973, 37, 1553).
Transport Information
Signal Word:WARNING; Hazard Class:II(Moderately hazardous)

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