<![CDATA[Butterfly pea flower (Clitoria ternatea L.) extract contains anthocyanins that have potential for use in cosmetic preparations. Lotion is a topical formulation consisting of an oil phase, a water phase, and an emulsifier. This research objective is to determine the effect of varying concentrations of stearic acid and triethanolamine (TEA) as emulsifiers on the physical stability of butterfly pea flower extract lotion. The variations in stearic acid and TEA concentrations used were F1 (1%:7%), F2 (2%:5%), and F3 (3%:3%). The evaluations included organoleptic properties, homogeneity, pH, viscosity, spreadability, adhesion, a hedonic test, and stability testing using the cycling test method. The results showed that all formulas exhibited a semi-solid form, a light green color, a lavender scent, and homogeneity, with a pH of 7–8, a viscosity of 2400–2900 cP, a spreadability of 5–7 cm, and an adhesion of greater than 4 seconds. Variations in the concentrations of stearic acid and TEA significantly affected the physical characteristics of the lotion: higher concentrations of stearic acid combined with lower concentrations of TEA resulted in increased viscosity and adhesion, while spreadability decreased. Conversely, the formula with lower stearic acid and higher TEA concentrations produced lower viscosity and adhesion but greater spreadability. The concentration variations influenced viscosity, spreadability, and adhesion, but did not affect organoleptic properties, homogeneity, or pH. The variation of stearic acid and TEA at a ratio of 2%:5% demonstrated the best physical stability. Based on the research findings, it can be concluded that variations in the concentrations of stearic acid and triethanolamine affect the physical stability of butterfly pea flower extract lotion, with the stearic acid and TEA formula at a ratio of 2%:5% providing the optimal physical stability.]]>
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