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: C₂₂H₁₈Cl₂FNO₃
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 dichloromethane and toluene, 10-20 g/l hexane, 20-50 g/l propan-2-ol
Stability: Thermally stable at room temperature.
Specification: 95%TC, 5%EC
Uses: Non-systemic insecticide with contact and stomach action. Acts on the nervous system, with rapid knockdown and long residual activity. 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.