Formulation of Cinnamon Essential Oil (Cinnamomum burmannii) and Clove Essential Oil (Syzygium aromaticum) Nanoemulsion-Based Liquid Soap

Soap is a cosmetic that acts as a cleaning agent, to protect the body from various diseases, such as skin diseases caused by bacteria and fungi. One of the bacteria that causes infection is Staphylococcus aureus. The eugenol content in cloves and cinnamaldehyde in cinnamon can inhibit the growth of bacteria. This research aims to determine the liquid soap formulation based on a nanoemulsion combination of clove and cinnamon essential oils that meets the physicochemical characteristics and its activity in inhibiting the growth of S. aureus bacteria using the diffusion method. The research results showed that clove and cinnamon essential oils had antibacterial activity, with the concentration of clove essential oil used being 2% and cinnamon essential oil 3%. Then it was formulated into a nanoemulsion with a composition ratio of Tween 80 and PEG 400 as the most optimal surfactant and cosurfactant of 40:10. The nanoemulsion is formulated into liquid soap where the nanoemulsion combination of clove and cinnamon essential oils is added to the liquid soap base. The resulting liquid soap has good physicochemical properties and meets the requirements.