SLSA for Facial Cleanser SLSA, also known as Sodium Lauryl Sulfoacetate, is a mild-positioned anionic surfactant used in personal care formulations for foaming, cleansing, wetting, and dispersion. In facial cleanser formulations, SLSA can be evaluated as a foaming and cleansing surfactant, especially for rinse-off products such as facial cleansing powders, powder-to-foam cleansers, facial cleansing bars, solid cleansers, and mild foaming …