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HEDP.Na2 powder Technical 90% min

Disodium of 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid


CAS No.: 7414-83-7

Molecular Formula: C2H6O7P2Na2          Molecular weight: 250


HEDP•Na2 is an organophosphonic acid corrosion inhibitor, it can chelate with Fe, Cu, and Zn ions, it can dissolve the oxidized materials, has good scale and corrosion inhibition effects even under 250℃.






White powder

White powder

Active content (HEDP•Na2)%

90 min


Active content(HEDP)%



density (20℃)g/cm3



Fe Ions(Fe3+)  PPM

35 max


Phosphorous acid (as PO33-)%

2 max


Moisture, %



PH (1% water solution)




HEDP.Na2 is widely used in circulating cool water system, medium and low pressure boiler, oil field water pipelines as scale and corrosion inhibitor in fields such as electric power, chemical industry, metallurgy, fertilizer, etc.. In light woven industry,HEDP.Na2 is used as detergent for metal and nonmetal. In dyeing industry, HEDP.Na2 is used as peroxide stabilizer and dye-fixing agent; In non-cyanide electroplating, HEDP.Na2 is used as chelating agent.


25kg/bag, and can make special specification according to customers’ requirement

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