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Chemical Identification
Common Name
Bromoxynil
中文通用名
溴苯腈
IUPAC
3,5-dibromo-4-hydroxybenzonitrile
CAS
3,5-dibromo-4-hydroxybenzonitrile
CAS No.
1689-84-5
Molecular Formula
C7H3Br2NO
Molecular Structure
Category
Activity
Herbicide
Premix
Bromoxynil octanoate+MCPA-isooctyl
Mesotrione+Bromoxynil octanoate+Atrazine
MCPA+Bromoxynil
Nicosulfuron+Bromoxynil
DIFLUFENICAN+BROMOXYNIL OCTANOATE
MCPA-sodium+Bromoxynil octanoate
Bromoxynil octanoate+Nicosulfuron+Fluroxypyr-meptyl
Premix Parters: lambda-cyhalothrin; fenobucarb; imidacloprid; MIPC;
Physical Properties
Molecular weight:276.9; Physical form:Colourless solid. Composition:Tech. grade is c. 95% pure. Melting point:194-195 °C (sublimes at 135 °C/0.15 mmHg); ( tech., 183-192 °C); Vapour pressure:6.3 × 10-3 mPa (20 °C); Henry constant:1.34 ×10-5 Pa m3 mol-1 (calc.); Partition coefficient(n-octanol and water):logP = 2.8 (unionised); pKa:3.86; Solubility:In water 130 mg/l (20 °C). In dimethylformamide 610, tetrahydrofuran 410, acetone, cyclohexanone 170, methanol 90, ethanol 70, mineral oils <20, benzene 10 (all in g/l, 25 °C).; Stability:Very stable to dilute alkalis and acids. Stable to u.v. light. Thermally stable below the melting point.;
Toxicology
Oral:Acute oral LD50 for rats 190, mice 110, rabbits 260, dogs c. 100 mg/kg. Percutaneous:Acute percutaneous LD50 for rats >2000, rabbits 3660 mg/kg. Mild eye irritant; non-irritating to skin (rabbits). Not a skin sensitiser (guinea pigs). Inhalation: LC50 (4 h) for rats 0.41 mg/ml. ADI:( JMPR) 0.03 mg/kg b.w. [1993].
Environmental Profile
Ecotoxicology: Algae:EC50(72 h) for Scenedesmus subspicatus 140 mg/l.Bees: LD50(48 h, oral) 4 mg/bee; harmful to bees.Birds:Acute oral LD50 for pheasants 50, hens 240, quail 100-125, mallard ducks 200 mg/kg. Sub-acute oral LC50 (21 d) for pheasants 4000 ppm diet.Daphnia: LC50(48 h) 12.5 mg/l.Fish:LC50 (48 h) for goldfish 0.46, catfish 0.063 mg/l. Environmental fate: Animals:See plants.Soil:In soil, DT50 c. 10 d. Degraded by hydrolysis and debromination to less toxic substances such as hydroxybenzoic acid. For persistence in soil, see Pestic. Sci., 1980, 11, 341.Plant:Metabolism in plants and animals is by hydrolysis of the ester and nitrile groups, with some debromination occurring (J. H. Buckland, Pestic. Sci., 1973, 4, 149, 689).
Transport Information
Signal Word:WARNING; Hazard Class:II(Moderately hazardous)

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