Used as a flame retardant additive in polymers and plastics due to its ability to promote char formation and reduce flammability. It is effective in epoxy resins, polyurethanes, and textile coatings where thermal stability and fire resistance are required. Also serves as an intermediate in the synthesis of other phosphorus-containing compounds used in industrial applications. Its hydrophilic nature allows for better dispersion in aqueous systems, making it suitable for use in water-based formulations. Additionally, it has been explored in metal surface treatment for corrosion inhibition.