HEDP,HEDP(CAS No.  2809-21-4  ), HEDP 60%,HEDP 90%,HEDP liquid,HEDP solid, HEDP.Na, HEDP.Na2,HEDP.Na4, HEDP.Kx,  

HEDP•Na4,HEDP,HEDP liquid,HEDP acid,HEDP solid,HEDP.Na2

ATMP, HEDP, EDTMPS,EDTMPA, DTPMPA, PBTCA, PAPE, HPAA, HMDTMPA, PAPEMP, BHMTPMPA

1-Hydroxy Ethylidene-1,1-Diphosphonic Acid (HEDP)

CAS No. 2809-21-4 Dequest:2010

Molecular Formula: C2H8O7P2 Molecular weight: 206.02

Properties:
1-Hydroxy Ethylidene-1,1-Diphosphonic Acid (HEDP)is an organophosphoric acidcorrosion 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. 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid (HEDP) shows excellent scale and corrosion inhibition effects under temperature 250°C. 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid (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). 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid (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. When built together with other water treatment chemicals, it shows good synergistic effects.
The solid state of 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid (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.

Specification:
items index
Appearance Colorless or light yellow transparent liquid White crystal powder
Active content (HEDP)% 58.0-62.0 89.0 min
Phosphorous acid (as PO33-)% 2.0 max 0.5 max
Phosphoric acid (asPO43- )% 0.8 max 0.5 max
Chloride (as Cl-)% 0.01 max 0.01 max
pH (1％ solution) 2 max 2 max
Density (20°C)g/cm3 1.40 -
Fe ion ppm 10 max 20 max
Colour APHA (Hazen) 40 max -

Usage:
1-Hydroxy Ethylidene-1,1-Diphosphonic Acid (HEDP) is used as scale and corrosion inhibition in circulating cool water system, oil field and low-pressure boilers in fields such as electric power, chemical industry, metallurgy, fertilizer, etc.. In light woven industry, 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid (HEDP) is used as detergent for metal and nonmetal. In dyeing industry, 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid (HEDP) is used as peroxide stabilizer and dye-fixing agent; In non-cyanide electroplating, 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid (HEDP) is used as chelating agent. The dosage of 1-10mg/L is preferred as scale inhibitor, 10-50mg/L as corrosion inhibitor, and 1000-2000mg/L as detergent. Usually, 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid (HEDP) is used together with polycarboxylic acid.

Package and Storage:
1-Hydroxy Ethylidene-1,1-Diphosphonic Acid (HEDP) liquid: Normally In 250kg net Plastic Drum, IBC drum can also be used as required 1-Hydroxy Ethylidene-1, 1-Diphosphonic Acid (HEDP) solid: 25kg inner liner polyethylene (PE) bag, outer plastic woven bag, or confirmed by clients.
Storage for ten months in room shady and dry place

Contact Information:

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