CHARACTERIZATION OF PHYSICOCHEMICAL PROPERTIES OF SOLID LAUNDRY SOAP BASED ON LERAK (Sapindus rarak DC.)

Lerak (Sapindus rarak DC.) is one of the fruits with a main active compound called saponin. Saponins function as natural surfactants foaming and emulsifying properties. in Indonesia widely used traditional detergent. Using lerak essence detergent, batik washing can be done well without fading colors more environmentally friendly. applied an additional component preparing solid laundry soap. Adding to replace anionic surfactant Sodium Lauryl Sulfate (SLS). Therefore, risk pollution lowered, keep cloth from easily out. This study was conducted using Randomized Block Design (RBD) two factors, including concentration (10%, 7.5%, 5%) NaOH molecules (0.5 mol 0.375 mol). aimed analyze effect variation molecular on physicochemical properties The results showed that higher molecules, it reduces water content Concentrations 10% 0.5 have highest value for foam stability lowest moisture content. Among tensile strength, pH, brightness level yellowness level, 7.5% molecules. Treatments concentrations significantly affect while treatment affects stability, (L*) (b*).