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Home > Products >  Disodium of 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid (HEDP.Na2)

Disodium of 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid (HEDP.Na2) CAS NO.7414-83-7

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  • FOB Price: USD 710 /Metric Ton Get Latest Price
  • Min.Order: 1 Metric Ton
  • Payment Terms: L/C,T/T,Western Union,MoneyGram
  • Available Specifications:

    liquid(1-23)Metric Tonpowder(1-23)Metric Ton

  • Product Details


  • HEDP.Na2
  • 90% min powder
  • 20% min liquid

Quick Details

  • ProName: Disodium of 1-Hydroxy Ethylidene-1,1-D...
  • CasNo: 7414-83-7
  • Molecular Formula: C2H6O7P2Na2
  • Appearance: liquid and powder
  • Application: HEDP.Na2 is widely used in circulating...
  • DeliveryTime: Shipped in 7 days after payment
  • PackAge: 1000L IBC and 25kg/bag,palletized,shri...
  • Port: Shanghai,China
  • ProductionCapacity: 45000 Metric Ton/Year
  • Purity: 20% and 90%
  • Storage: In shady room and dry place.
  • Transportation: Sea freight or air cargo according to ...
  • LimitNum: 1 Metric Ton
  • Heavy metal: 0
  • Grade: Industrial Grade


the hedp.na2 has two forms: liquid and powder.
the powder is 90% min;the liquid is 20% min.
it is stable under high ph value, not easy to be hydrolyzed, not easy to be decomposed under normal light and heat condition, its acid or alkaline and chloride oxidation tolerance are better than that of other organophosph-onic acids. hedp.na2 can form six-ring chelating compounds with metal ions in water system, ca2+ in particular. hedp.na2 has good scale inhibition effects and obvious dissolution threshold effects. when used with other water treatment chemicals, the synergistic effects is better.
twin chemical co.,ltd. is a modern enterprise for production,sale,export and trade of chemicals.
why twin
. top 10 chemical enterprises in china 
. over 12 years of experience 
. wholly owned production plant (48500 square meters)
. sales to more than 76 countries 
. high quality hedp.na2 with competitive prices
. strong r&d and private label/contract manufacturing


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℃.





Colorless to yellowish transparent liquid

White powder

Active content(HEDP)%

16.5 min


Active content (HEDP•Na2)%

20.0 min

90 min

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.


Liquid: 200L plastic drum, IBC(1000L), and can make special specification according to customers’ requirement.

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

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