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Insecticide
  • Beta-cyfluthrin(CAS RN 68359-37-5)

Beta-cyfluthrin(CAS RN 68359-37-5)

  • Description:
  • Beta Cyfluthrin content:

    Min. 95%.

    Appearance:

    White to light yellow crystalline powder.

    Weight loss after drying:

    Max. 0.5%.

    Acidity (as H2SO4) :

    Max. 0.3%.

    Insoluble substance in acetone:

    Max. 0.5%.

  • Description

Common name beta-cyfluthrin (BSI, draft E-ISO); beta-cyfluthrine ((f) draft F-ISO); cyfluthrin-beta (Canada)
IUPAC name (RS)--cyano-4-fluoro-3-phenoxybenzyl (1RS,3RS;1RS,3SR)-3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropanecarboxylate
Chemical Abstracts name cyano(4-fluoro-3-phenoxyphenyl)methyl 3-(2,2-dichloroethenyl)-2,2-dimethylcyclopropanecarboxylate
CAS RN [68359-37-5]

PHYSICAL CHEMISTRY
Composition Comprises a mixture of four diastereoisomeric pairs of enantiomers:
I (R)--cyano-4-fluoro-3-phenoxybenzyl (1R)-cis-3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropanecarboxylate + (S)-, (1S)-cis-;
II (S)-, (1R)-cis- + (R)-, (1S)-cis-;
III (R)-, (1R)-trans- + (S)-, (1S)-trans-;
IV (S)-, (1R)-trans- + (R)-, (1S)-trans- .
Tech. grade contains: <2% diastereoisomer I, 30-40% diastereoisomer II, <3% diastereoisomer III, and 53-67% diastereoisomer IV.  Mol. wt. 434.3  M.f. C22H18Cl2FNO3  Form Colourless crystals; (tech. is a white to light yellow crystalline powder).  M.p. (II) 81 ºC; (IV) 106 ºC  V.p. (II) 1.4 10-5 mPa; (IV) 8.5 10-5 mPa (both 20 ºC)  KOW (II) logP = 5.94; (IV) logP = 5.91  Henry (II) 2.9  10-3; (IV) 3.1  10-2 (both in Pa m3 mol-1, 20 °C)  S.g./density 1.34 g/cm3 (22 ºC)  Solubility In water: (II) 2.1, (IV) 1.2 (both in g/l, 20 ºC). In dichloromethane and toluene, both pairs >200 g/l (20 ºC). (II) In hexane 2-5, isopropanol 5-10 (both in g/l, 20 ºC). (IV) in hexane 1-2, isopropanol 2-5 (both in g/l, 20 ºC).  Stability Thermally stable at room temperature. Hydrolysis DT50 (22 ºC) for (II): 117 d (pH 4), 20 d (pH 7), 6 d (pH 9); for (IV): 25 d (pH 4), 11 d (pH 7), 5 d (pH 9).

APPLICATIONS
Mode of action Non-systemic insecticide with contact and stomach action. Acts on the nervous system, with rapid knockdown and long residual activity.
Uses Insecticide effective against Lepidoptera, Coleoptera, Hemiptera and Homoptera on cotton, fruit, vegetables, cereals and other crops, at 7.5-20 g/ha. Also against migratory locusts and grasshoppers; and in animal health.
Formulation types 95%TC 2.5%CS 1.3%,2.5%,2.8%,4.3%EC 2.5%EW 2.5%ME 1.25%,2.5%,4%,6%,7.5%SC 50%WP

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