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

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

Sample Price : Depending on the customs tariff
Delivery Time : within a week (depends on your quantity)
Model Number : hedp
Place of Origin : china
Category : Acid Dyes
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Molecular Formula: C2H8O7P2 Molecular weight: 206.02

Propertiesof HEDP:
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℃. 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 of HEDP:
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:
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: Normally In 250kg net Plastic Drum, IBC drum can also be

used as required 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.
Safety Protection:Acidity, Avoid contact with eye and skin, once contacted,

flush with water. 
Synonyms:
HEDP;HEDP(A);HEDPA;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


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