Benzalkonium Chloride (abbreviation: BAC) is a quaternary ammonium salt compound. As a broad-spectrum fungicide of cationic surfactant, it can effectively control the reproduction of bacteria and algae in water and the growth of slime, and has good slime stripping effect and certain It has the functions of dispersing and osmosis, and has certain degreasing, deodorizing and corrosion-inhibiting effects. At the same time, because benzalkonium chloride has a good disinfection effect, it is widely used in medical disinfection and is the main component of common eye drops and Band-Aids.