HEDP-Na4 is the sodium salt of HEDP, an excellent inhibitor of calcium carbonate scale. HEDP-Na4 is mainly used as a metal corrosion inhibitor for low-pressure boiler water treatment, circulating water treatment, industrial municipal clean water, and swimming pool sterilization.

The solid state of HEDP-Na4 is white powder, easily soluble in water, moisture-absorbent; it is easy to be transported and suitable for use under severe cold conditions.

HEDP-Na4 belongs to organic phosphonate scale and corrosion inhibitor; it can form stable complexes with iron, copper, zinc and other metal ions, and can dissolve oxides on metal surface. It can dissolve the oxides on the metal surface. It still plays a good role of corrosion and scale inhibition under 250℃. HEDP-Na4 is widely used in electric power, chemical industry, metallurgy, fertilizer and other industrial circulating cooling water, low-pressure boiler, oil field water injection and oil pipeline scale and corrosion inhibition; HEDP-Na4 in the textile industry, can be used as metal and non-metal detergent, peroxide stabilizers in printing and dyeing industry and color-fixing agent, cyanide-free plating complex, additives for daily chemicals. In light textile industry, HEDP-Na4 can be used as metal and non-metal cleaning agent, peroxide stabilizer and color-fixing agent in printing and dyeing industry, non-cyanide electroplating complexing agent, additive of daily-use chemicals.

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