HEDP

Hydroxyethylenediphosphoric acid (HEDP)ZX-C3-06 is an organic polyphosphonic acid compound. At room temperature, the pure product is a white crystalline state, while the industrial product is a colorless to pale yellow transparent viscous liquid. It is highly soluble in water and organic solvents such as methanol and ethanol. It has stable chemical properties, is resistant to acids and alkalis and is not prone to hydrolysis. It maintains structural stability even in high-temperature environments and has excellent chelating ability, effectively combining metal ions such as calcium, magnesium and copper.

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Description

General

ZX-C3-06 HEDP is an organophosphoric acid corrosion inhibitor. It can chelate with Fe, Cu, and Zn etc. metal ions and form stable complex compound. It can dissolve the oxidized materials on these metals'surfaces. Under250C HEDP shows excellent scale and corrosion inhibition ability. 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 of HEDP is high purity product, suitable for using in winter and freezing districts. it is quite suitable for using as cleaning agent in electronic fields and as additives in daily chemicals.

Composition

Organophosphoric acid corrosion inhibitor

Product properties

Appearance	Transparent powder crystal
Active component (HEDP)	% ≥ 90
Active component (measured by HEDP·H2O)	% ≥ 98
Phosphorous acid (PO33-)% ≤ /div	0.
PH value (1% aqueous solution)	≤ 2.0
Phosphoric acid (as PO43-) content	%≤ 0.5
Chloride (Cl-)%, ppm	≤ 80
Iron (in Fe2+)ppm	5

Application

HEDP is widely used in the in circulating cool water system of electric power, chemical industry, metallurgy, fertilizer, etc. and widely used as a scale and corrosion inhibitor of low-pressure boilers, field water flood, oil pipeline.

In light&textile 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.

Packing

HEDP liquid: Normally In 30kg or 250kg net Plastic Drum; HEDP solid: 25kg inner liner polyethylene (PE) bag, outer plastic woven bag, or confirmed by clients request.Storage for ten months in room shady and dry place.

Storage

ZX-C3-06 HEDP should be stored in a ventilated, cool, dry storeroom and should be away from the fire. The container must be sealed to prevent volatilization if certain amount of inhibitor has been remained in the container after use. The quality of the inhibitor product is guaranteed for one year in normal atmospheric temperature.

Safety and handling

ZX-C3-06 HEDP is Acidity, Avoid contact with eye and skin, once contacted, flush with water.

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