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Secang wood is one of the plants that contains many antioxidants, secondary metabolites and antibacterial compounds. This study aims to determine characterization of simplicia and chemical substances of Secang wood extract. Secang wood which was already in the form of simplicia was extracted by maceration using 96% ethanol solvent and the extract was concentrated with a rotary evaporator at a temperature of 40°C, then screening and characterization tests were carried out. The results of this study showed that phytochemical screening of the ethanol extract of sappan wood (Caesaloinia sappan L) showed the presence of flavonoid, tannin, saponin, alkaloid, steroid, and phenolic compounds. Characterization of simplicia obtained results at water content (3.95%) water soluble extract (11.01%), ethanol soluble extract (17.22%), total ash content (1.81%) and non-soluble ash content. acid soluble (0.28%).

Secang wood from the Caesalpiniacea tribe which was commonly found in Indonesia had secondary metabolites as antibacterial. This study aims to formulate secang wood ethanol extract into a transparent solid soap that is able to meet quality requirements. This research method was begin with formulating the extract into a transparent solid soap preparation with 3 concentrations, namely 5g (F1), 10g (F2), and 15g (F3). Furthermore, appearance tests, foaming ability, free alkali, free fatty acids, irritation, hedonic, and pH were carried out. The results of the research on transparent solid soap gave different colors for each concentration, namely transparent bright red (F1) and transparent dark red (F2 and F3) which were stable for 4 weeks; the foam power test shows a height of 4.5-6.5 cm after 10 minutes; free alkaline test shows a value of 0.07-0.08%; free fatty acid test 0.16%, and pH test 8.96-9.66 at week 4; and transparent solid soap does not cause irritation, attractive and liked by volunteers