Used as a key intermediate in the synthesis of organic compounds, particularly in the production of flame retardants and plasticizers. It plays a significant role in modifying polymer properties, enhancing thermal stability and flame resistance in materials like textiles and electronics. Additionally, it is utilized in the preparation of metal-organic frameworks (MOFs) for applications in gas storage, separation, and catalysis. Its phosphonic acid group makes it valuable in surface modification and corrosion inhibition for metals. In agriculture, it serves as a precursor for developing plant growth regulators and pesticides.