Dodecanoic acid is most widely used in surfactant industry. According to the classification of surfactants, dodecanoic acid can be divided into cationic type, anionic type, non-ionic type and amphoteric type. See the attached table of this item for the varieties of dodecanoic acid surfactants. Some surfactants of dodecanoic acid and dodecanol derivatives are also disinfectants, such as dodecyl dimethyl benzyl ammonium chloride (geramine), dodecyl dimethyl benzyl ammonium bromide (Bromogeramine), dodecyl dimethyl (2-phenoxyethyl) ammonium bromide (Domiphen). Dodecyl dimethyl ammonium-2,4,5-trichlorophenol salt in these derivatives can be used as citrus preservative. Dodecanoic acid has many applications in plastic additives, food additives, perfume industry and pharmaceutical industry.