Benzalkonium chloride (BZK, BKC, BAK, BAC) is the active ingredient used to make Hygiene Clean Hand Sanitizer. This active ingredient acts by disrupting the cell membranes of the target organisms and is active at relatively low concentrations (0.12%-0.13%). Since this surfactant is not volatile, it is expected to remain on the skin as the product dries. BZK has a long history of use in both surface disinfectants used in the food industry and as a skin sanitizer.²