Diethylene Triamine Penta (Methylene Phosphonic Acid), commonly known as DTPMPA, is a high-performance organophosphorus compound that has gained widespread recognition in industrial water treatment and multiple manufacturing sectors. With the CAS number 15827-60-8 and the molecular formula C9H28O15N3P5, this compound exhibits unique physical and chemical properties that distinguish it from other water treatment agents. DTPMPA is innoxious and readily soluble in acidic solutions, presenting as a brownish-yellow or reddish-brown viscous liquid under normal conditions. Its most prominent features include excellent scale and corrosion inhibition capabilities, coupled with exceptional thermal stability, making it suitable for harsh operating environments.
One of the core advantages of DTPMPA lies in its superior performance under high-temperature and alkaline conditions. Unlike conventional organophosphorus agents, it maintains stable scale inhibition and corrosion resistance even at temperatures exceeding 210°C and in strong alkaline systems, addressing the limitations of traditional water treatment chemicals in extreme environments. Additionally, DTPMPA demonstrates strong chelating ability with various metal ions such as calcium, magnesium, copper, and iron, forming stable soluble complexes. This characteristic enables it to effectively dissolve metal oxides on equipment surfaces, such as rust and copper rust, while preventing the formation of insoluble scales.
In terms of quality specifications, DTPMPA complies with the HG/T 3777-2005 standard, with an active component content of no less than 50.0%. Its density ranges from 1.35 to 1.45 g/cm³ at 20°C, and the pH value of a 1% aqueous solution is ≤ 2.0. These strict quality indicators ensure its reliability in industrial applications. The combination of low toxicity, high efficiency, and wide environmental adaptability makes DTPMPA a preferred choice in water treatment and related fields, laying a solid foundation for its extensive application across various industries.
Compared with other organophosphorus compounds, DTPMPA requires a lower dosage to achieve the same scale and corrosion inhibition effects, which helps reduce overall operational costs. Its innocuous nature also minimizes environmental impact when used in compliance with specifications, aligning with the modern industrial pursuit of green and efficient production. These inherent advantages make DTPMPA an indispensable functional additive in many industrial processes.