The material shall consist of technical permethrin complying with the requirements of FAO Specification 331/TC/S (1991), dissolved in suitable solvents and with any other necessary formulants. It shall be in the form of a stable liquid, free from visible suspended matter and sediment.
Maximum 3 g/kg
Maximum acidity: 1.5 g/kg calculated as H2SO4
Emulsion stability and re-emulsification
After the heat stability test, the product, when diluted at 30°C with CIPAC Standard Waters A and C, shall comply with the following: Time after dilution Limits ofstability
0 h Initial emulsification complete
0.5 h’Cream’, maximum: 1 ml
2.0 h’Cream’, maximum: 2 ml
‘Free oil’: nil
24 h Re-emulsification complete
24.5 h ‘Cream’, maximum: 2 ml
‘Free oil’, maximum: 2 ml
If required, the flash point of the product shall not be lower than 230C declared flash point. A closed cup method shall be used and the method stated
Stability at 0 ±1°C
After storage at 0 ±10C for 7 days, the volume of solid and/or liquid which separates shall be not more than 0.3 ml.
Stability at 54 ± 2°C
After storage at 54 ± 20C for 14 days, the product shall continue to comply with permethrin content and acidity.