Diethylenetriaminepentamethylenephosphonic acid heptasodium salt, commonly known as DETPMP•Na7, is a highly efficient organic phosphonic acid-based compound. The product has a chemical formula of C9H28N3O15P5Na7, a molar mass of 683.15 g/mol, and exhibits excellent performance in various applications. One of the main advantages of DETPMP•Na7 is its excellent chelating properties. It can form stable complexes with various metal ions, effectively prevent the formation of scale, and eliminate the adverse effects of metal ions in the water system. Additionally, the product significantly inhibits corrosion on metal surfaces, making it an excellent choice for boiler water treatment, industrial cooling water systems, and oilfield applications.