Didecyldimethylammonium bromide (DDAB) is widely used as a disinfectant and sanitizer in various industries due to its strong antimicrobial properties. It is effective against a broad spectrum of bacteria, viruses, and fungi, making it a key ingredient in surface cleaners, antiseptics, and healthcare products. In agriculture, it is applied as a biocide to control microbial growth on crops and in irrigation systems. DDAB is also utilized in the formulation of personal care products, such as shampoos and conditioners, for its antimicrobial and conditioning effects. Additionally, it serves as a stabilizer in nanoparticle synthesis and gene delivery systems in biotechnology and pharmaceutical research. Its versatility and efficacy make it a valuable component in both industrial and scientific applications.