Benzalkonium chloride solution contains benzalkonium chloride, a quaternary ammonium compound. It is a mixture of alkylbenzyldimethylammonium chlorides.
The three main uses areas: a biocide, a cationic surfactant, and a phase transfer agent. Benzalkonium chloride is used in fabric softeners, cosmetics, shampoos, conditioners, and body lotions.
As a biocide it is among the most common active ingredients in household and industrial disinfectants.