BTMS Conditioning Emulsifier, also known as Behentrimonium Methosulfate is a commonly used vegetable derived emulsifier. It can be used in hair conditioners, skin care products like creams and lotions and scrubs.BTMS adds a silky feel to lotions and hair care products. Products with BTMS incorporated tend to have a light, whipped appearance. Commonly used in hair conditioners, lotions and scrubs.