BIFENTHRIN

Common Name: bifenthrin, bifenth (BSI, ANSI, draft E-SO); bifenthrine (f) draft F-ISO

Chemical Name:

IUPAC: 2-methylbiphenyl-3-ylmethyl (Z)-(1RS, 3RS)-3-(2-chloro-3,3,3-trifluoroprop-1-enyl)-2,2-dimethylcyclopropanecarboxylate

CAS: (2-methyl-[1,1’-biphenyl]-3-yl)-methyl 3-(2-chloro-3,3,3-trifluoro-1-propenyl)-2,2-dimethyl cyclopropanecarboxylate

Structural formula:

Empirical formula: C₂₃H₂₂ClF₃O₂

Molecular weight: 422.9

CAS number: 82657-04-3

Colour odour and Physical state: Bifenthrin is an off-white to pale tan waxy solid with a faint, slightly sweet smell.

Melting point or range (for solids): 68-70.6℃

Boiling point or range (for liquids): N/A

Condensation point (gases): N/A

Density/specific gravity: 1.210.0g/ml, 25℃

Vapor pressure, volatility: 0.024mPa , @25℃

Solubility in water determined (g/l or mg/l) in neutral range, acidic range (pH 4-6) and alkaline range (pH 8 to 10) Water, @25℃, 0.1mg/l

Solubility in fats and various organic solvents (expressed in gm/l or mg/l): Bifenthrin is soluble in methylene chloride, acetone, chloroform, ether and toluene. It is slightly soluble in heptane and methanol.

N-Octanol/water partition coefficient (Pow r log pow): more than 6.0

Hydrolysis in aqueous solution under acid, neutral and basic condition: Bifenthrin is stable to hydrolysis.

Stability in the presence of metal ions ( data regarding stability to metal and the metal ions are required only if there is likelihood that  the TGAC will come into contact with metal/metal ions during storage or use;Flash point: Bifenthrin is stable to metals like iron etc, it is stable for 2 years at 25℃ and 50℃, in natural daylight DT50: 255 days, stable 21 days at PH 5-9, 21℃.fhash point: 165℃ (tag open cup); 151℃ (Pensky Martens closed cup).

Bifenthrin is photostable, stable to hydrolysis, has minimal volatility, and is stable in storage. It has a negative temperature coefficient, so it works better at lower temperature.

During storage: the possible main break-down product of Bifenthrin are: 2-methyl-3-phenyl-benzyl alcohol, 2-methyl-3-phenylbenzoic acid, 2-methyl-3-phenylbenzaldehyde, 4’-hydroxy bifenthrin, and cis,trans-4-(2-chloro-3,3,3-trifluoro-1-propenyl)-3,3-dimethylcyclopropanecarboxylic acid, etc.