Didodecyldimethylammonium bromide is widely used as a disinfectant and antimicrobial agent due to its ability to disrupt microbial cell membranes. It is commonly applied in healthcare settings for surface disinfection, ensuring the elimination of bacteria, viruses, and fungi. Additionally, it is utilized in the preservation of industrial products, such as paints and coatings, to prevent microbial growth and spoilage. Its surfactant properties also make it effective in fabric softeners and hair conditioners, where it imparts softness and reduces static. In agriculture, it serves as a biocide to protect crops from harmful pathogens, enhancing yield and quality.