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Home > Products >  HEDP

HEDP CAS NO.2809-21-4

  • Product Details

Keywords

  • 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid
  • Dequest 2010
  • Etidronic Acid

Quick Details

  • ProName: HEDP
  • CasNo: 2809-21-4
  • Molecular Formula: C2H8O7P2
  • Appearance: Clear, Colorless to pale yellow aqueou...
  • Application: HEDP is used as scale and corrosion in...
  • DeliveryTime: within 10 working days
  • PackAge: 200L plastic drum, IBC(1000L), custome...
  • Port: Qingdao port
  • ProductionCapacity: 20 Metric Ton/Day
  • Purity: 60%
  • Storage: Storage for ten months in room shady a...
  • Transportation: by sea
  • LimitNum: 1 Metric Ton

Superiority

STABLE QUALITY,COMPETITIVE PRICE,EXCELLENT SERVICE.

Details

                                 1-   Hydroxy Ethylidene-1,1-Diphosphonic Acid

(HEDP)
CAS No.  2809-21-4                             
Molecular Formula:   C2H8O7P2                         Molecular weight: 206.02 
Synonyms: Dequest 2010; Etidronic Acid
Properties:
HEDP is an organophosphoric acid corrosion inhibitor. It can chelate with Fe, Cu, and Zn ions to form stable chelating compounds. It can dissolve the oxidized materials on these metals’ surfaces. It shows excellent scale and corrosion inhibition effects under temperature 250℃. 
HEDP 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, it has good antiscale and visible threshold effects. When built together with other water treatment chemicals, it shows good synergistic effects. 
Solid HEDP is crystal powder, suitable for usage in winter and freezing districts. Due to its high purity, it can be used as cleaning agent in electronic fields and as additives in daily chemicals.  
Specification:
Items
Index
Appearance
Clear, Colorless to pale yellow aqueous solution
White crystal powder
Active content (HEDP) % 
58.0-62.0
90.0min
Phosphorous acid (as PO33-) %
2.0 max
0.8 max
Phosphoric acid  (asPO43- ) %
0.8 max
0.5 max
Chloride (as Cl-) ppm
100.0 max
100.0max
pH (1% solution)
2.0 max
2.0 max
Density  (20℃) g/cm3
1.43-1.47
-
Fe, mg/L
10.0 max
5.0 max
Colour APHA (Hazen)
30.0 max
-
Ca sequestration (mg CaCO3/g)
500.0 min
-

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