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    Lambda-Cyhalothrin 2.5% EC


  • Product Specification
    • Name of the Product
    • Lambda-cyhalothrin 2.5% EC
    • Pack Shot
    • Lambda-cyhalothrin content
    • Lambda-cyhalothrin 25 g/kg

    • Class
    • Synthetic Pyrethroid
    • CAS Number
    • 91465-08-6
    • Empirical formula
    • C23H19ClF3NO3
    • Chemical Name
    • A reaction product comprising equal quantities of
      (S)-α-cyano-3-phenoxybenzyl (Z)-(1R,3R)-3-(2-chloro-3,3,3-trifluoroprop-1-enyl)-2,2-
      dimethylcyclopropanecarboxylate and
      (R)-α-cyano-3-phenoxybenzyl (Z)-(1S,3S)-3-(2-

    • Structural Formula    
    • Structural formula of lambda-cyhalothrin
    • Molecular Weight
    • 449.9

    • Description
    • The material shall consist of technical lambda-cyhalothrin, complying with the requirements of WHO specification 463/TC (2003), dissolved in suitable solvents together with any other necessary formulants. It shall be in the form of a clear to slightly hazy, stable homogeneous liquid, free from visible suspended matter and sediment, to be applied as an emulsion after dilution with water.

    • PH Range
    • 6.0 to 8.0
    • Persistent foam
    • There shall be a maximum of 15 ml after 1 minute.


    • Emulsion stability and re-emulsification  
    • The formulation when diluted at 30 ± 20C  with CIPAC Standard Waters A and D, shall comply with the following:

      Time after dilution       Limits of stability

      0 h      Initial emulsification complete
      0.5 h    'Cream', maximum: 1 ml
      2.0 h    'Cream', maximum: 2 ml
      'Free oil': maximum trace

      24 h       Re-emulsification complete
      24.5 h    'Cream', maximum: 2 ml

                                  'Free oil', maximum: trace
    • Storage stability
    • Stability at 0 °C

    • After storage at 0 ± 2°C for 7 days, the volume of solid or liquid which separates shall not be more than 0.3 ml.

    • Stability at elevated temperature
    • After storage at 54 ± 2°C for 14 days, the determined average active ingredient content shall not be lower than 95%, relative to the determined average content before storage and the formulation shall continue to comply with the clauses for pH range and emulsion stability and re-emulsification.