Ammonium alcohol polyvinyl phosphate is widely used as a flame retardant in various materials, particularly in textiles and plastics. It works by forming a protective char layer when exposed to fire, which helps to prevent the spread of flames and reduce smoke generation. This makes it valuable in applications such as protective clothing, upholstery, and insulation materials where fire safety is critical. Additionally, it is utilized in coatings and adhesives to enhance their fire-resistant properties. Its compatibility with other materials and effectiveness at relatively low concentrations make it a practical choice for improving fire safety in industrial and consumer products.