Bifenox

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Chemical Identification | General Product Information | Physical & Safety Data

Chemical Identification

Common Name

Bifenox

中文通用名

甲羧除草醚

IUPAC

methyl 5-(2,4-dichlorophenoxy)-2-nitrobenzoate

CAS

methyl 5-(2,4-dichlorophenoxy)-2-nitrobenzoate

CAS No.

42576-02-3

Molecular Formula

C₁₄H₉Cl₂NO₅

Molecular Structure

General Product Information

Category

Herbicides > Diphenyl ether herbicides

Activity

Herbicide

Premix

Premix Parters: amitraz; S-bioallethrin; zeta-cypermethrin; imidacloprid; indole-3-butyric acid;

Physical & Safety Data

Physical Properties

Molecular weight:342.1; Physical form:Yellow crystals with a slightly aromatic odour. Density:0.65 g/ml (bulk density); Composition:×97% pure. Melting point:84-86 °C; Vapour pressure:0.32 mPa(30 °C); Henry constant:1.14 × 10-2 Pa m3 mol-1; Partition coefficient(n-octanol and water):logP = 4.5; Solubility:In water 0.35 mg/l (25 °C). In acetone 400, chlorobenzene 400, xylene 300, ethanol <50 (all in g/kg, 25 °C). Slightly soluble in aliphatic hydrocarbons.; Stability:Thermally stable up to 175 °C; total decomposition occurs above 290 °C. Stable in slightly acidic or slightly alkaline media, but rapidly hydrolysed above pH 9. DT50 in saturated aqueous solution, 24 m;

Toxicology

Oral:Acute oral LD₅₀ for rats >5000 mg tech./kg, mice 4556 mg/kg. Percutaneous:Acute percutaneous LD₅₀ for rabbits >2000 mg/kg. Non-irritating to skin and eyes. Inhalation:LC₅₀ for rats >0.91 mg/l air.

Environmental Profile

Ecotoxicology:
Bees: LD₅₀(contact) >1000 mg/bee.Birds:Dietary LC₅₀(8 d) for ducks and pheasants >5000 mg/kg diet.Daphnia:LC₅₀ (48 h) 0.66 mg/l.Fish: LC₅₀(96 h) for rainbow trout >0.67, bluegill sunfish >0.27 mg/l.Worms: EC₅₀ and NOEC >1000 mg/kg.Other aquatic spp.:LC₅₀ (96 h) for Palaemonetes pugio (grass shrimp) 569 ppm, for Mysidopsis bahia (mysid shrimp) 0.065 mg/l; (48 h) for Crassostrea virginica (Eastern oyster) 210

Environmental fate:
Animals:Bifenox is relatively rapidly absorbed and eliminated from the body; 5-(2,4-dichlorophenyl)-2-nitrobenzoic acid was the major urinary metabolite, with no bifenox detected. Bifenox together with 5-(2,4-dichlorophenyl)anthranilate were detected in faeces.Soil:DT₅₀ in soil c. 5-7 d. Duration of residual activity is c. 7-8 w. Degradation is mainly chemical and microbial, and the two principal metabolites are 5-(2,4-dichlorophenoxy)-2-nitrobenzoic acid and methyl 5-(2,

Transport Information

Hazard Class:III(Slightly hazardous)