SLSA vs SLES: Are They the Same? No. SLSA and SLES are not the same ingredient. SLSA stands for Sodium Lauryl Sulfoacetate, while SLES stands for Sodium Laureth Sulfate, also known as Sodium Lauryl Ether Sulfate. Although both ingredients are anionic surfactants and both can create foam, they are different materials with different chemical structures, product forms, formulation uses, and …