The Behentrimonium methosulfate is an organic compound with the formula C26H57NO4S. The IUPAC name of this c hemical is docosyl(trimethyl)azanium; methyl sulfate. With the CAS registry number 81646-13-1, it is also named as N,N,N-Trimethyl-1-docosanaminium methosulfate. Additionally, this chemical is anti-static, so it can make the hair shiny. And it is also used as surface active agent.