Physicochemical Characteristics and Antioxidant Activity of Solid Soap Enriched with Crude Eucheuma cottoni Extract

Abstract

Eucheuma cottoni extract is known to have potential as an antioxidant because it has secondary metabolite content in the form of bioactive compounds that can be utilized. The content of bioactive compounds are flavonoids, terpenoids, steroids, coumarins, and alkaloids. Soap is one of the products used to clean the body, with a very varied shape. Soap that people need today not only serves to maintain skin hygiene as well as to maintain healthy skin from free radicals. The purpose of this research is to know the effect of different concentration on the addition of Eucheuma cottoni extract to the characteristics and to know the best concentration of the addition Eucheuma cottoni extract. For that purpose, Eucheuma cottoni seaweed is extracted by maceration method using 60% methanol solvent. Eucheuma cottoni extract was added to soap with four various concentrations (0%, 3.5%, 4% and 4.5%). The research method used is Completely Random Design (RAL) experiment, with one factor that is the concentration of Eucheuma cottoni extract with three times repetition. Parametric data were analyzed by ANOVA and HSD test, while nonparametric data were analyzed by Kruskal-Wallis test. The results of the addition Eucheuma cottoni extract showed that the optimum concentration was 3.5% with antioxidant activity 10.296%, moisture content 8.54%, free fatty acid content 2.59%, pH 9.5, foam stability 84.48%, hardness 1134.42 gf, and the best hedonic test. These results have been in accordance with SNI 3532-2016.