Decyltrimethylammonium chloride is widely used as a surfactant in various industrial and household cleaning products. Its ability to reduce surface tension makes it effective in formulations for detergents, fabric softeners, and disinfectants. In the personal care industry, it is utilized in hair conditioners and skin cleansers for its conditioning and emulsifying properties. Additionally, it serves as an antimicrobial agent in sanitizers and antiseptic solutions, helping to eliminate bacteria and other pathogens. In agriculture, it is employed as a pesticide additive to enhance the effectiveness of formulations. Its cationic nature also makes it useful in water treatment processes, where it aids in the removal of organic contaminants and as a biocide to control microbial growth in industrial water systems.