Used as a key intermediate in the synthesis of polymeric scale inhibitors for water treatment applications. Its phosphonate groups enable strong chelation of metal ions like calcium and magnesium, helping prevent the formation of insoluble mineral deposits in industrial cooling systems and desalination plants. Also employed in the development of functionalized coatings and corrosion inhibitors due to its ability to adhere strongly to metal surfaces while providing water dispersibility. Additionally, it finds use in detergent formulations as a builder to enhance cleaning efficiency in hard water conditions.