IDENTIFICATION
Common name: Bifenthrin
Other name: bifenthrin (BSI, ANSI, draft E-ISO); bifenthrine ((f) draft F-ISO)
Iupac name : 2-methylbiphenyl-3-ylmethyl(Z)-(1RS,3RS)-3-(2-chloro-3,3,3-trifluoroprop -1-enyl)-2,2-dimethylcyclopropanecarboxylate
Chemical abstracts name: (2-methyl [1,1′-biphenyl]-3-yl) methyl 3-(2-chloro-3,3,3- trifluoro-1-propenyl)-2,2-dimethylcyclopropanecarboxylate
Type: Insecticide for Agriculture
CAS RN: [82657-04-3]
M.F. :C23H22ClF3O2
Mol Wt :422.9
PHYSICAL CHEMISTRY
Form (appearance): Viscous liquid; crystalline or waxy solid
M.P.: 68-70.6℃
V.P.: 0.024 mPa (25℃)
F.P.:165℃ (Tag open cup); 151℃ (pensky Martens closed cup)
S.G.:1.210 (25℃)
Solubility.: In water <1μg/l. Soluble in acetone, chloroform, dichloromethane, diethyl ether, and toluene. Slightly soluble in heptane and methanol
Stability: Stable for 2 y at 25℃ and 50℃ (tech.). In natural daylight, DT50 255 d; stable 21 d at pH 5-9 (21℃)
Henry: 1.02×102 Pa m3 mol-1 (calc.)
KowlogP: >6
APPLICATION
Formulation types: EC;GR;SC;UL;WP
Mode of action: Contact and stomach action
Uses: Effective against a broad range of foliar pests, including Coleoptera, Heteroptera, Homoptera, Lepidoptera and Orthoptera; it also controls some species of Acarina. Crops include cereals, citrus, cotton, fruit, grapes, ornamentals and vegetables. Rates range from 5 g a.i./ha against Aphididae in cereals to 45 g/ha against Aphididae and Lepidoptera in top fruit
Compatibility: Not compatible with alkaline materials
MAMMALIAN TOXICOLOGY
Reviews: FAO/WHO 65, 67 (see part 2 of the Bibliography).
Oral: Acute oral LD50 for rats 54.5 mg/kg.
Skin and eye: Acute percutaneous LD50 for rabbits >2000 mg/kg. Non-irritant to skin; virtually nondrritating to eyes (rabbits). No skin sensitization (guinea pigs).
Noel: (1 y) for dogs 1.5 mg/kg daily. Non-teratogenic in rats (≤2 mg/kg daily) and rabbits (8 mg/kg daily).
ADI: (JMPR) 0.02 mg/kg [1992].
Toxicity: WHO (a.i.) Ⅱ; EPA (formulation) II
ECOTOXICOLOGY
Birds: Acute oral LD50 for bobwhite quail 1800, mallard ducks 2150 mg/kg. Dietary LC50 (8 d) for bobwhite quail 4450, mallard ducks 1280 mg/kg diet.
Fish: LC50 (96 h) for bluegill sunfish 0.00035, rainbow trout 0.00015 mg/l.
Daphnia: LC50 (48 h) 0.00016 mg/l. Low solubility in water and high affinity for soil contribute to produce little impact in aquatic systems under field conditions.
Worms: /Bees: LD50 (oral) 0.1 μg/bee; (contact) 0.01462 ,μg/bee.
ENVIRONMENTAL FATE
Soil/Environment: Soil DT50 65-125 d. Koc 1.31-3.02 × 10-5.
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