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Chemical Identification
Common Name
Isoprothiolane
中文通用名
稻瘟灵
IUPAC
diisopropyl 1,3-dithiolan-2-ylidenemalonate
CAS
bis(1-methylethyl) 1,3-dithiolan-2-ylidenepropanedioate
CAS No.
50512-35-1
Molecular Formula
C12H18O4S2
Molecular Structure
Category
Activity
Fungicide/plant growth regulator
Premix
Hymexazol+isoprothiolane
Propiconazole+Isoprothiolane
Pyraclostrobin+Isoprothiolane
Emulsifiable concentrate, granule, wettable powder, ULV, LV. 
Premix Parters: flufenacet;
Physical Properties
Molecular weight:290.4; Physical form:Colourless, odourless crystals; ( tech., yellow solid, with irritating smell). Density:1.044; Composition:Tech. is >96%. Melting point:54-54.5 °C; ( tech., 50-51 °C); Vapour pressure:18.8 mPa (25 °C); Henry constant:0.1 Pa m3 mol-1 ( calc.); Partition coefficient(n-octanol and water):logP = 3.3 (25 °C); Solubility:In water 54 mg/l (25 °C). In methanol 1510, ethanol 760, acetone 4060, chloroform 4130, benzene 2770, n-hexane 10 (all in g/l, 25 °C).; Stability:Stable to acid, alkali, light and heat.
Toxicology
Oral:Acute oral LD50 for male rats 1190, female rats 1340, male mice 1340 mg/ kg. Percutaneous:Acute percutaneous LD50 for male and female rats >10 250 mg/kg. Slight eye irritant; not a skin irritant. Inhalation: LC50 (4 h) for rats >2.7 mg/l. Phytotoxicity:Phytotoxic only to cucurbitaceae.
Environmental Profile
Ecotoxicology: 
Birds:Acute oral LD50 for male Japanese quail 4710, female Japanese quail 4180 mg/ kg.Daphnia: LC50 (3 h) 62 ppm.Fish: LC50 (48 h) for rainbow trout 6.8, carp 6.7 mg/l.
Transport Information
Signal Word:CAUTION; Hazard Class:III(Slightly hazardous)

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