Sodium dodecylbenzenesulfonate, English name sodium dodecylbenzenesulfonate, referred to as SDBS, is a white or light yellow powder or flake solid. It is difficult to volatilize, easily soluble in water, and dissolves in water to form a translucent solution. It is chemically stable to alkali, dilute acid, and hard water, and is slightly toxic. It is a commonly used anionic surfactant.