[China(Mainland)]
CAS No. 2809-21-4
Molecular Formula: C2H8O7P2 Molecular weight: 206.02
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. HEDP
shows excellent scale and corrosion inhibition effects under temperature 250.C. 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, 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 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 |
Clear, Colorless to pale yellow aqueous solution |
White crystal powder |
|
Active content (HEDP)% |
58.0-62.0 |
90.0min |
|
Phosphorous acid (as PO33-)% |
1.0 max |
0.8 max |
|
Phosphoric acid (asPO43- )% |
0.6 max |
0.5 max |
|
Chloride (as Cl-) ppm |
100.0 max |
100.0max |
|
pH (1% solution) |
2.0 max |
2.0 max |
|
Density (20.C)g/cm3 |
1.43-1.47 |
|
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Fe,mg/L |
10.0 max |
5.0 max |
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Colour APHA (Hazen) |
30.0 max |
|
|
Acetic acid % |
0.5 max |
|
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Ca sequestration (mg CaCO3/g) |
500.0 min |
|
Usage:
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, HEDP is used as detergent for metal and nonmetal. In dyeing industry, HEDP is used
as peroxide stabilizer and dye-fixing agent; In non-cyanide electroplating, 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, HEDP is used together with polycarboxylic acid.
Package and Storage:
HEDP liquid: 200L plastic drum,IBC(1000L),customers' requirement.
HEDP solid: 25kg/bag,customers' requirement.
Storage for ten months in room shady and dry place.
Safety Protection:
Acidity, Avoid contact with eye and skin, once contacted, flush with water.
Synonyms:
HEDP;HEDP(A);ETIDRONIC ACID;1-Hydroxy Ethylidene-1,1-Diphosphonic Acid; Hydroxyethylidene-1,1-diphosphonicacid(HEDP); 1-HYDROXYETHYLIDENEDIPHOSPHONIC ACID;Hydroxyethylidene Diphosphonic acid(HEDP); 1-hydroxy-1,1-Ethanediyl ester

Cnhile Chemical Industrial Science&Technology Co.,Ltd is a specialized manufacturer of water treatment chemicals in China for above 15 years. And we are also the biggest ATMP manufacturer in China. We have more than 10 series and several tens of kinds of water treatment agents. They are mainly used in oilfield, power plant, steel plant, textile&dying, etc. We have cooperation with many big companies, such as Sinopec. Company's mainly products show as below:Acetyl chloride,ATMP,HEDP,EDTMPS,HPAA,PAAS,PAPE,PBTCA,HPMA,AA-AMPS,MA-AA,PCA,Phosphorous acid,DTPMP,PAA,Corrosion inhibitor,corrosion,water treatment chemical,water treatment,rust,chelant,water condition,anti-scale,scale inhibitor,TTA,BTA,AMPS,,etc
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