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Common NameDimefuron
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中文通用名噁唑隆
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IUPAC3-[4-(5-tert-butyl-2,3-dihydro-2-oxo-1,3,4-oxadiazol-3-yl)-3-chlorophenyl]-1,1-dimethylurea
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CASN′-[3-chloro-4-[5-(1,1-dimethylethyl)-2-oxo-1,3,4-oxadiazol-3(2H)-yl]phenyl]-N,N-dimethylurea
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CAS No.34205-21-5
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Molecular FormulaC15H19ClN4O3
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Molecular Structure
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Category
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ActivityHerbicide
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Physical PropertiesMolecular weight: 338.8. Physical form: Colourless, odourless crystals. Melting point:193 °C; Vapour pressure:0.1 mPa (20 °C); Henry constant:2.12×10-3 Pa m3 mol-1 ( calc.); Partition coefficient(n-octanol and water):logP = 2.51; Solubility:In water 16 mg/l (20 °C). Readily soluble in chloroform. Moderately soluble in acetone, acetonitrile, acetophenone and ethanol. Slightly soluble in benzene, toluene and xylene.; Stability:Stable in aqueous solution in acidic conditions.
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ToxicologyOral:Acute oral
LD50 for rats >5000, mice >10,000 mg/kg, dogs >2000 mg/kg. Percutaneous:Acute percutaneous LD50 for rats >2000 mg/kg. Non-irritant to eyes and skin (rabbits). -
Environmental ProfileEcotoxicology:
Bees:Non-toxic to bees.LD50 (48 h) (contact) >500 µg formulation/bee; (oral) >2563 µg formulation/bee.Birds:Non-toxic to birds.Fish: LC50 (96 h) for rainbow trout and bluegill sunfish >1000 mg/l.
Environmental fate:
Animals:Metabolites include desmethylaminodimefuron, monomethylamino-tert-butylhydroxydimefuron and monomethylaminodimefuron.Soil:Residual activity persists in soil for 3-6 months, following application in late autumn or winter. Microbial degradation increases rapidly in the spring as the temperature rises. Kdes 19.0-44.9 (4 soil types),Koc 13Plant:Metabolites include N-demethyldimefuron and N-didemethyldimefuron. -
Transport InformationSignal Word:CAUTION; Hazard Class:III (Slightly hazardous)
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