Hedp By Zhengzhou Welcom Tech Co. Ltd.

In the series of our range of products, we are engaged in manufacturing, supplying and exporting an extensive range of HEDP.
Chemical Name : 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid(HEDP)
CAS No.:2809-21-4
Molecular Formula: C2H8O7P2
Molecular Weight:206.02
Production:500MT/month
Main specification :50% liquid m:liquid 60 % and powder 90%

60% liquid
Active content (HEDP)% i 60%min
Phosphorous acid (as PO33-)% i 2.0 max
Phosphoric acid? (asPO43- )% i 0.6 max
Chloride (as Cl-)% i 0.01 max
PH (1% solution)i 2 max
Density (20oC)g/cm3i 1.440min
Fe (ion) ppmi 10 max
Sequestrant value(CaCO3)mg/gi 500min
Colour APHA (Hazen)i 50max

90% powder:
Active content (HEDP)%:90.0 min
Phosphorous acid (as PO33-)%:0.5 max
Phosphoric acid? (asPO43- )%:0.3 max
Chloride (as Cl-)%:0.05 max
PH (1% solution):2 max
Density(20oC)g/cm3:-
Sequestrant value(CaCO3)mg/g:-
Fe (ion) ppm:20 max
Colour APHA (Hazen):
Active content (HEDP.H2O)%:98%min

1)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 metalsa surfaces.
2)HEDP shows excellent scale and corrosion inhibition effects under temperature 250A C.
3)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).