BTMS (Behentrimonium Methosulfate) is a conditioning emulsifier commonly used in hair and skin care products. It is especially valued for its gentle conditioning properties and ability to emulsify oil and water phases. It is a mild, plant-derived conditioning emulsifier that provides excellent detangling and softening benefits to hair and skin. It is a self-emulsifying wax that allows you to easily blend oils and water into smooth, stable emulsions.