The physical characteristics of the O/W microemulsion made from the surfactant cetyltrimethylammonium bromide (CTAB), cold liver oil, water, and lauryl alcohol (LA) as a non-ionic cosurfactant were investigated using Electrical conductivity and hydrodynamic viscosities at various temperature and different oil additions. The range of concentration CTAB ranged from 1× 10-3 M to 2 × 10-2 M. Through the aid of the level of the critical micelle concentration (CMC) and the typical free energy of micellar (G o m) dissociation () micellization was assessed. Also discovered is that the growth of the CMC of CTAB is gradually accompanied by a starting at 25 °C to 55 °C. It is obvious to see that the CMC of CTAB continues to rise when more cold is introduced. increased by liver oil. In light of the findings from this study, it can the usage of CTAB is advised for micellization in watery medium and the creation of optical or water emulsions or microemulsions would have many applications in the future, especially in the production of pharmaceuticals and cosmetics

Keywords : Surfactants, Microemulsions, Cetyl Trimethyl Ammonium Bromide, Cold Liver Oil, Lauryl Alcohol, CMC, Electrical Conductivity.