Chemical name: (RS)-α-cyano-4-fluoro-3-phenoxybenzyl(1RS,3RS;1RS,3SR)-3-(2,2-= dichlorovinyl)-2,2-dimethylcyclopropanecarboxylate or (RS)-α-cyano-4-fluoro-3-phenoxybenzyl(1RS)-cis-trans-3- (2,2-dichlorovinyl) -2,2-dimethylcyclopropanecarboxylate
CAS no.: 68359-37-5

Structural formula:

Molecular formula: C₂₂H₁₈C_l2FNO₃
Physical & chemical property:
Cyfluthrin is a mixture of four diastereoisomers and their ratio, expressed as a percentage of the sum of the four diastereoisomers, shall be:
diastereoisomer I (1R,3R,aR + 1S,3S,aS = 1:1; cis): 23.0-27.0%
diastereoisomer II (1R,3R,aS + 1S,3S,aR = 1:1; cis): 17.0-21.0%
diastereoisomer III (1R,3S,aR + 1S,3R,aS = 1:1; trans): 32.0-36.0%
diastereoisomer IV (1R,3S,aS + 1S,3R,aR =1:1; trans): 21.0-25.0%
Physical State: Colourless crystals
Melting point: 64°C(I), 81°C(II), 65°C(III), 106°C(IV)
Density: 1.28(20°C)
Solubility: In water 0.002 mg/ml 20°C,
in other solvents: > 200 g/l in toluene and dichloromethane, 10-20 g/l hexane, 20-50 g/l propan-2-ol
Stability: Thermally stable at room temperature.
Specification: 92%TC, 5%EC
Uses: An insecticide effective against many pests, especially Lepidoptera, Coleoptera, Homoptera and Hemiptera on cereals, cotton, fruit and vegetables; also against migratory locusts and grasshoppers. For agricultural uses, applied at 15-40g/ha. Used against Blattellidae, Culicidae and Muscidae in public health situations, stored products, domestic use and animal health. It has a rapid knockdown effect and long-lasting residual activity.