TT No. 297: Determination of Deltamethrin in Edible Oil

Deltamethrin is the common name for (S)-α- cyano-3-phenoxybenzyl(1R)-cis-3-(2,2- dibromovinyl)-2,2-dimethylcyclopropane carboxylate with the structure as in Figure 1. It is a colourless crystalline solid with a melting point of 98o C-100o C. The vapour pressure is 0.002 mPa at 25o C and it is almost insoluble in water with a solubility of 0.002 g litre-1 at 20oC. Solubility in other solvents: acetone 500 g litre-1, benzene 450 g litre-1, cyclohexanone 750 g litre-1, dioxane 900 g litre-1 all at room temperature while solubility in ethanol at 20o C is 900 g litre-1. It is a lypophilic compound and has low volatility.

Main Research: Dr Ainie Kuntom