Also known as Behentrimonium Methosulfate, it is a conditioning emulsifier. It’s a vegetable-based quaternary ammonium salt that comes from rapeseed. Many times, it is confused for being a chemical due to the ‘sulfate’ included in its name. But the reality is that while Sulfates are irritants for the skin, BTMS-50 is a conditioning agent that works to provide moisture to the skin.
