Long chain APG surfactant, sold as a ~50% viscous liquid, works in combination with fatty soap for this application. Primary function as a mild Degreaser and a foaming/stabilizing surfactant. Mild to skin and also can synergistically reduce the skin irritation caused by anionic surfactants. Has synergy with Lactic acid to increase the dish clean plate count. Contains no biocide for preservation. Listed on EPA’s Safer Chemical Ingredients List.