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Hydroxyethylidenediphosphonic acid

  • CAS NO: 2809-21-4
  • Grade: industry grade
  • Purity: 90%
  • Specs: powder
  • Packaging: 25kg bag
  • Capacity: 2000MTS/month
  • Price: Inquiry

HEDP is an organic phosphoric acid scale and corrosion inhibitor, which can form stable complexes with iron, copper, zinc and other metal ions and dissolve oxides on metal surface. HEDP can still play a good role in corrosion and scale inhibition at 250 C. It is still stable at high pH value and difficult to hydrolyze. It is difficult to decompose under ordinary photothermal conditions. Acid and alkali resistance and chlorine oxidation resistance are better than other organic phosphoric acid (salt). HEDP can form hexacyclic chelate with metal ions in water, especially calcium ions, so HEDP has better scale inhibition effect and obvious solubility limit effect. When combined with other water treatment agents, HEDP shows an ideal synergistic effect.

HEDP solid belongs to high purity products, suitable for winter cold areas; especially suitable for cleaning agents and daily chemical additives in the electronics industry.

  


ItemStandardResult
Appearancewhite crystalwhite crystal
Active Component,%

≥90.0

90.78
Chloride,%

≤100

16
Ph Value(10g/L water solution)1.5-2.01.64
Orthophosphate,%

≤0.50

0.18
Phosphorous Acid

≤0.80

0.39
Fe,mg/L

≤10

4.14

Conclusion:PASS.

CAS NO.
2809-21-4
Name
1-Hydroxyethylidene-1,1-diphosphonic acid
Alias
1-Hydroxyethane-1,1-diphosphonic acid; 1-Hydroxyethylidenedi(phosphonic acid); Dequest 2010; Etidronic acid; HEDP
Formula
C2H8O7P2
Formula weight
206.03
Structural formula
Density
1.45 (60% aq.)
Transport Information
UN 3265
  • Payment term: T/T 30% in advance and T/T 70% against copy of B/L. or 100% L/C at sight.
  • Shipment time: Within 3 weeks after confirming order.
  • We take photos of every stage of the process and can send them to you. Before we ship the container, you will have photos and lab test results.

Provide quality after-sale service once the container is received.

   In case the product is damaged, we will refund you or resend a new packaging.
   Also, if the goods are not as per your specification, we will callback the container at our cost, or compensate you as per our agreement.

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