Abstract: “Biodiesel is a fuel of future which may be produced by adopting different methods. To deal with the future rapid increasing demand of energy and to handle the toxic greenhouse gas (GHG) emissions, new ideas for the production of low cost biodiesel must be considered. Waste soap and soap stocks (WSS) have been used to produce biodiesel. The price of the process is much lower and considerable in contrast to vegetable oils and other possible alternatives. In this research work, a sample product of biodiesel was obtained by using commercially available soap stocks and soap wastes. In the above process, acid catalyzed trans-esterification multi stage process was applied to achieve greater level of conversion. Finally, important and significant fuel properties like Flash point, Pour point, Cloud point and Fire point were performed according to ASTM procedural standards. The overall results in light of above mentioned tests displayed that the quality of produced diesel from mixture of waste s”

Keywords: Biodiesel, Waste soap and soap stocks (WSS), Fuel Properties.