Preparation and Characterization of Alternative Oil-in-Water Emulsion Formulation of Deltamethrin

The purpose of this study was to prepare a stable oil-in-water emulsion formulation of deltamethrin. Oil-in-water emulsion was prepared by using a two-step procedure. Stability studies were performed at different accelerated conditions (0°C and 54°C) to predict the stability of the formulation. Different parameters, namely, active ingredient content, mean particle size distribution, pH, viscosity, flash point, effect of centrifugation, persistent foaming and emulsion stability were determined during stability studies. The formulation exhibited good stability after preparation at different temperatures. No phase separation was observed during stability testing