Can SLSA Be Used in Shampoo Bars? Yes. Sodium Lauryl Sulfoacetate, commonly known as SLSA, can be used in shampoo bars. SLSA is a high-foaming anionic surfactant widely used in solid and powder-based personal care formulations. Because it is available in fine powder form, it is especially suitable for shampoo bars, cleansing bars, bath bombs, cleansing powders, and other waterless …