Ammonium alcohol polyvinyl phosphate is widely used as a flame retardant in various materials, particularly in textiles and plastics. It works by promoting char formation and reducing the flammability of these materials, making them safer for use in applications such as clothing, upholstery, and construction materials. Additionally, it is utilized in coatings and adhesives to enhance fire resistance without significantly altering the physical properties of the base material. Its effectiveness and compatibility with other additives make it a valuable component in industries prioritizing fire safety.