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Quick Details

  • Classification: Chemical Auxiliary Agent
  • CAS No.: 2809-21-4
  • Other Names: HEDP
  • MF: C2H8O7P2
  • EINECS No.: 2809-21-4
  • Purity: 60% / 98%
  • Place of Origin: Shanghai, China (Mainland)
  • Type: scale and corrosion inhibitor
  • Usage: Petroleum Additives, Textile Auxiliary Agents, Water Treatment Chemicals, Oilfield reinjection water system and Dyeing
  • Brand Name: HEDP
  • Model Number: KIMA-S201
  • Application: as scale and corrosion inhibitor
  • Description: Chemicals Auxiliary Agent
  • Appearance: Clear colorless to pale transparent liquid/White crystalline solid
  • Solid content%: 60%/ 98%
  • Product name: organophosphoric acid corrosion inhibitor
  • similar to: Dequest 2010; MBC220; PTP0100
  • Other name: HEDP
  • sample time: 7 dasys-HEDP
  • package: DRUM/ BAG-HEDP

Packaging & Delivery

Packaging Details 1) HEDP liquid: Normally in 200L drum or IBC (1000L) can be used as required.
2) HEDP solid: 25Kg inner liner polyethylene (PE) bag, outer plastic woven bag or 1000L jumbo bag can be used as required.
Delivery Time Shipped in 7 days after payment

Product Name:   1-    Hydroxy Ethylidene-1,1-Diphosphonic Acid (HEDP)






HEDP (similar to Dequest 2010; MBC220; PTP0100) is an organophosphoric acid corrosion inhibitor, It can be mixed with water by any proportion, stable chemical properties. It belongs to corrosives Class 8.1. It has good complexation for bivalent metal ions; its alkali tolerance & temperature resistance are excellent. HEDP shows good scale & corrosion inhibition performance and shows the ideal synergistic effect when compound used with zinc ions.


The solid state of HEDP is crystal powder, suitable for usage in winter and freezing districts because of its high purity. It can be used as cleaning agent in electronic fields and as additives in daily chemicals.


CAS No.2809-21-4                 Molecular Weight: 206.02

Molecular Formula: C2H8O7P2    

Structural Formula:       









Clear colorless to pale transparent liquid

White crystalline solid

Active Content( as HEDP)%



PH value (1% water) ≤



Phosphorous acid (as PO33-) % ≤



Phosphoric acid (as PO43-)% ≤



Density (20 oC) g/cm3



Chloride (as Cl- ) mg/l ≤



Acetic acid(as CH3COOH)% ≤



Iron content ( as Fe2+) mg/l ≤



Calcium chelating value (mg/g)≥



Color number APHA ≤






Character and Advantage


HEDP can chelate with Fe, Cu, and Zn ions to form stable chelating compounds. It can dissolve the oxidized materials on these metals’ surfaces. It has good chemical stability under high pH value, hard to be hydrolyzed, and hard to be decomposed under ordinary light and heat conditions. Its acid/alkali and chlorine oxidation tolerance are better than that of other organophosphoric acids (salt). HEDP can react with metal ions in water system to form hexa-element chelating complex, with calcium ion in particular. Therefore, HEDP has good antiscale and visible threshold effects.   







1)      Oilfield reinjection water system: as scale and corrosion inhibitor.

2)      Dyeing: as chelating agent & oxygen bleaching stabilizer.

3)      Electroplating industry: as non-cyanide complexing agent.

4)      RO system: as scale inhibitor.

5)      Circulating cool water system: as scale and corrosion inhibitor.



Package and Storage


Package and Storage Recommendation

1)  HEDP liquid: Normally in 200L drum or IBC (1000L) can be used as required.

2)  HEDP solid: 25Kg inner liner polyethylene (PE) bag, outer plastic woven bag or 1000L jumbo bag can be used as required.

3)  Storage for 24 months in room shady and dry place.


Sample Picture










Company Information




Company Introduction


We, SHANGHAI KIMA CHEMICAL CO., LTD., are located in PUTUO District, Shanghai City, we are a Chinese leading & professional Phosph-chemicals supplier of Water Treatment Chemicals, Inorganic acid, Inorganic Phosphate chemicals, pesticide intermediates and other raw materials.




Our products have been exported to more than 40 countries and areas all over the world on a regular basis and won the high esteem and reputation from our customers. We always target to provide our customers with top-quality products along with moderate prices and professional services, and endeavor to be a 360 degree-solution supplier for the concerned products.




So far, with our production bases in Jiangsu Province and Guangxi Province, we can provide customers with more than 100,000 tons of Water Treatment Chemicals, Inorganic phosphoric acid, stable and efficient Inorganic Phosphate chemicals every year. By cooperating with various domestic higher education institutions and the foreign industry leaders, we constantly develop new products to meet market demands; in the field of electronic phosphoric acid, HEDP, PBTCA, PESA… we have nearly 100 kinds of products for customers' choice, which nearly cover all industries such as food additive, pharmaceutical manufacturing, oil field, dyeing, chemical polishing, circulating cool water system, printing industry and so on.



Company   address:Shanghai  city,China                 


Production   base : Jiangsu  province,China                


Guangxi province,China








Our Services

Our services


Operation Philosophy: Cooperation, All-win, Development.


Business Objective: Becoming the top-quality manufacturer in water treatment field. 


Target Customer: Global water treatment companies & Wholesalers & Distributors; Traders and Service Enterprises of Water treatment field.


Special Service:


Supply a full set of technical services, including water quality analysis, formula screening, operation scheme draft, etc.


Supply product R&D, customer-made, sample processing. All of the manufacture and logistics links will be completed by KIMA; you only need to share the achievement.







For the sample


We can supply the free sample, about sample postage, as a new customer, we can't bear it. If you are our regular customer, we will bear it. Thank you for your understanding!


PLS give me your delivery address; I need calculate the charge about private courier by air.

Then you will arrange the postage charge to our bank account,

and then we will let our manufacture department to prepare the samples ASAP. 





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