Behentrimonium Chloride is a cleaning/conditioning agent (known as a “cationic quaternary ammonium compound”) and can be made from colza oil obtained from the seeds of Brassica rapa, var. oleifera (oilseed turnip). It conditions, detangles, fights static, softens, restores, and rebuilds damaged hair. It doesn’t coat, but penetrates the hair shaft for potent conditioning effects. In some applications, it also acts as a preservative.