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Chemical Identification
Common Name
Fuberidazole
中文通用名
麦穗宁
IUPAC
2-(2′-furyl)benzimidazole
CAS
2-(2-furanyl)-1H-benzimidazole
CAS No.
3878-19-1
Molecular Formula
C11H8N2O
Molecular Structure
Category
Activity
Fungicide
Premix
Water dispersible powder (slurry), dry seed treatment powder, flowable, concentrate, solution.
Premix Parters: amitrole; oxyfluorfen trifluralin; terbuthylazine; trifluralin;
Physical Properties
Molecular weight:184.2; Physical form:Fine crystalline, light brown, odourless powder ( tech.). Melting point:292 °C ( decomp.); Vapour pressure:9 × 10-4 mPa (20 °C); 2 × 10-3 mPa (25 °C); Henry constant:2 × 10-6 Pa m3 mol-1 (20 °C); Partition coefficient(n-octanol and water):logP = 2.67 (22 °C); pKa:c. 4, weak base; Solubility:In water 220 mg/l ( pH 4), 71 mg/l ( pH 7) (both 20 °C). In isopropanol 31, toluene 0.35, dichloromethane 6.6 (all in g/l, 20 °C).; Stability:Stable to hydrolysis in pure water, under sterile conditions, but sensitive to light: DT50 15 min (aqueous solution), 6 h (on silica gel).;
Toxicology
Oral:Acute oral LD50 for male rats c. 336, mice c. 650 mg/ kg. Percutaneous:Acute percutaneous LD50 for rats >5000 mg/kg. Not irritating to skin and eyes (rabbits). Inhalation: LC50 (4 h) for rats >0.3 mg/l air (aerosol).
Environmental Profile
Ecotoxicology: Algae: ErC50 for Scenedesmus subspicatus 0.49 mg/l.Bees:Not harmful to bees when used as directed (seed treatment).Birds:Acute oral LD50 for Japanese quail 500 mg/ kg.Daphnia: LC50 (48 h) 5.6 mg/l.Fish: LC50 (96 h) for golden orfe 16.2, rainbow trout 2.5 mg/l.Worms: LC50 for Eisenia foetida >1000 mg/ kg dry soil. Environmental fate: Animals:In mammals, following oral administration, fuberidazole is rapidly metabolised by hydrolysis and hydroxylation. Elimination is mainly in the urine.Soil:Mobility in different soils is low. Degradation is rapid; DT50 0.6-11 d, DT90 5-64 d measured in laboratory trials, using predominantly BBA standard soils 1 and 2. Direct photodegradation in water contPlant:According to a balance study with labelled a.i. using seed-treated spring wheat planted in a lysimeter, young plants absorbed about 10% of the applied radioactivity which, however, decreased to 1-2% in later development stages.
Transport Information
Signal Word:WARNING; Hazard Class:II(Moderately hazardous)

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