CHARACTERISTICS OF AVOCADO OIL-BASED COFFEE-SCENTED LIQUID FACIAL SOAP WITH Sapindus rarak FOAMING AGENT

Abstract

The purpose of this study was to assess the properties of liquid soap made from avocado oil and a natural foaming agent derived from the lerak fruit (Sapindus rarak). Saponification of avocado oil was carried out by mixing 100 g of avocado oil at various concentrations of KOH (20; 25; 30; 35 and 40 % w/w) at a temperature of 70-75°C for 2 hours. Then coffee extract and soaked lerak fruits were added, each as a fragrance and foaming agent. The parameters to examine the quality of the liquid soap included density, viscosity, free alkali, pH, and organoleptic. The results showed that KOH concentration affected the viscosity of the soap produced. Density, free alkali, and pH showed no significant difference to the changes in KOH concentration. The results of the organoleptic test pointed out that the product had good quality and was strongly acceptable at 30% KOH concentration. The values of density, viscosity, free alkali, and pH under these conditions were 1.018 gr/mL, and 0.866 kg/m.s, 0.1041% and 11 respectively. Above all, the characteristics of the product complied with the Indonesian National Standards No. 40-4058-1996.