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Chemical Identification
Common Name
Metobromuron
中文通用名
溴谷隆
IUPAC
3-(4-bromophenyl)-1-methoxy-1-methylurea
CAS
N′-(4-bromophenyl)-N-methoxy-N-methylurea
CAS No.
3060-89-7
Molecular Formula
C9H11BrN2O2
Molecular Structure
Physical Properties
Molecular weight:259.1; Physical form:Colourless crystals. Density:1.60 (20 °C); Melting point:95.5-96 °C; Vapour pressure:0.40 mPa (20 °C); Henry constant:3.1 × 10-4 Pa m3 mol-1 (calc.); Partition coefficient(n-octanol and water):logP = 2.41; Solubility:In water 330 mg/l (20 °C). In acetone 500, dichloromethane 550, methanol 240, toluene 100, octanol 70, chloroform 62.5, hexane 2.6 (all in g/l, 20 °C).; Stability:Very stable in neutral, dilute acid and dilute alkaline media. Hydrolysed by strong acids and alkalis. DT50 (20 °C) 150 d (pH 1), >200 d (pH 9), 83 d (pH 13).;
Toxicology
Oral:Acute oral LD50 for rats 2603 mg/ kg. Percutaneous:Acute percutaneous LD50 for rats >3000, rabbits >10 200 mg/kg. Not a skin or eye irritant (rabbits). Inhalation: LC50 (4 h) for rats >1.1 mg/l air. Phytotoxicity:Some bean and tobacco varieties may be injured.
Environmental Profile
Ecotoxicology: 
Algae: EC50 (5 d) 0.26 mg/l.Bees:Not toxic to bees. LC50 (oral) >325 mg/bee; (contact) >130 mg/bee.Birds: LD50 for Japanese quail 565, Pekin ducks 6643 mg/ kg b.w. LC50 (7 d) for Japanese quail >10 000, mallard ducks >24 300, bobwhite quail 18 100 Daphnia: LC50 (48 h) 44 mg/l.Fish: LC50 (96 h) for rainbow trout 36, bluegill sunfish 40, crucian carp 40 mg/l.Worms: LC50 (14 d) for earthworms 467 mg/ kg (practically non-toxic). 

Environmental fate: 
Animals:Metabolism proceeds mainly via N-demethylation, N-dealkoxylation, phenyl ring hydroxylation, cleavage of the ureido group and subsequent conjugation with sulfuric acid.Soil: DT50 in soil 30 d; strongly bound to soil (Koc 184 ml/g), indicating low leaching potential. In water, it is stable to abiotic degradation, bu,t in biologically active systems, DT50
Transport Information
Signal Word:CAUTION; Hazard Class:III(Slightly hazardous)

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