The Sodium Lauryl Ether Sulphate (SLES) is widely used in the composition of detergents and frequently ends up in wastewater treatment plants. Sodium laureth sulfate, or sodium lauryl ether sulfate (SLES), is an anionic detergent and surfactant found in many personal care products (soaps, shampoos, toothpaste etc.). SLES is an inexpensive and very effective foaming agent. SLES, SLS, ALS, and sodium pareth sulfate surfactants that are used in many cosmetic products for their cleansing and emulsifying properties. They behave similarly to soap.