The material shall consist of technical deltamethrin, complying with the requirements of WHO specification 333/TC (April 2005), together with any necessary formulants. It shall be in the form of a stable homogeneous liquid, free from visible suspended matter and sediment.
The pH of an aqueous dispersion shall be 4.5 to 7.5
Stability at 0 °C
After storage at 0 ± 2°C for 7 days, no separation of particulate or oily matter shall be visible after gentle agitation.
Stability at elevated temperature
After storage at 54 ± 2°C for 14 days, the determined average active ingredient content must not be lower than 95% relative to the determined average content found before storage and the formulation shall continue to comply with the clause for:
– pH range