Decyltrimethylammonium bromide is widely used as a surfactant and disinfectant in various industrial and household applications. It is effective in cleaning and sanitizing surfaces, particularly in environments requiring stringent hygiene, such as hospitals and laboratories. The compound is also utilized in the formulation of fabric softeners and hair conditioners, where it helps to reduce static and improve texture. In addition, it serves as a phase transfer catalyst in organic synthesis, facilitating reactions between substances in different phases. Its antimicrobial properties make it valuable in water treatment processes to control microbial growth.