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Organophosphonic Acid Scale Inhibitor Chelating Agent Etidronate Disodium HEDP Na2 CAS 7414-83-7

HEDP.Na2 is an organophosphonic acid corrosion inhibitor, it can chelate with Fe, Cu, and Zn ions, it can dissolve the oxidized materials, it has good scale and corrosion inhibition effects even under 250℃,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/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 usedwith other Water Treatment Chemicals, the synergistic effects is better.
Availability:
Quantity:
  • HEDP Na2 20% 90%

  • Sinobio

  • 29319090

Disodium of 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid(HEDP•Na2)



Name: HEDP
CAS: 2809-21-4
Chemical formula: C2h8o7p2
Appearance: Colorless transparent liquid

Etidronic acid (HEDP) is a new type of chloride free electroplating complexing agent, which is used as the main agent to stabilize the water quality in the circulating cooling water system and plays a role of corrosion and scale inhibition.
This product is one of the organic polyphosphonic acid free water tablets, and there are also other varieties of this type of product produced domestically, such as amino trimethylene phosphonic acid (ATMP): [CH2PO (OH) 2] 3N, and  (EDTMP), etc. Organic polyphosphonic acid is a type of water treatment agent developed in the late 1960s and confirmed around the 1970s. The emergence of this type of treatment agent has taken a significant step forward in water slicing technology. Compared with organic polyphosphates, organic polyphosphonate free acids have the characteristics of chemical stability, difficult hydrolysis, high temperature resistance, small dosage, and scale moderation. It is a type of cathodic corrosion inhibitor and a type of non chemical equivalent scale inhibitor; When used in combination with other water treatment agents, it exhibits ideal synergistic effects. It has excellent chelating properties for many metal ions such as calcium, magnesium, copper, zinc, etc., and even has good deactivation effects on inorganic salts of these metals such as CaSO4, CaCO3, MgSiO3, etc. Therefore, it is widely used in water treatment technology.



Specification


Active content(HEDP)%
90.0min
Active content(HEDP·H2O)%
98.0min
Ph0sphorous acid(as PO3 3-)%  
0.8max
Ph0sphoric acid(as PO4 3-)%
0.6max
PH (1% solution )
2.0max
Fe ppm
5.0max
Chloride ppm
100.0max



Application scope and method of use


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, The dyes the industry fixing agent In non-cyanide electroplating used as chelating agent.



Package and Storage


HEDP.Na2 plastic drum, 25kg or 250kg, or confirmed by clients Storage for ten months in shady room and dry place. 


package   package   package



Safety Protection


HEDP.Na2 Weak acidity, Avoid contact with eye and skin, once contacted, flush with water.

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