BEHENTRIMONIUM METHOSULFATE

Behentrimonium Methosulfate (BTMS) is a quaternary ammonium compound derived from rapeseed (canola) oil, where the behenic acid (C22 fatty acid) chain is responsible for its exceptional conditioning and detangling performance. Unlike traditional quats such as behentrimonium chloride, the methosulfate counterion is considered milder and less irritating to skin and eyes, making it a preferred choice in rinse-off and leave-in conditioning formulations. Formulators prize BTMS for its dual functionality as both a cationic emulsifier and a substantive hair conditioner, enabling the creation of stable oil-in-water emulsions that deposit conditioning actives directly onto the hair shaft without requiring additional emulsifiers.