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

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

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MOQ : 1 Kilogram

1-Hydroxy Ethylidene-1,1-Diphosphoric Acid (HEDP) Specification

Melting Point
>190C (decomposes)

Molecular Weight
206.03 g/mol

Structural Formula
CH3C(OH)(PO3H2)2

Form
Liquid or powder

Purity
60% (as HEDP liquid); 98% (as HEDP solid)

Solubility
Freely soluble in water

Shape
Liquid or crystalline solid

HS Code
29319090

Refractive Rate
1.4221.430

Smell
Odorless

Density
1.38 Gram per cubic centimeter(g/cm3)

Ph Level
1.52.5 (1% solution)

Storage
Store in cool, dry, ventilated area. Keep containers tightly closed

Other Names
HEDP; Etidronic Acid

Molecular Formula
C2H8O7P2

Classification
Organophosphonic acid scale inhibitor

Grade
Industrial/Technical Grade

Type
Acidic chemical compound

Usage
Used in cooling water systems, boilers, detergent industries, textile, and dyeing

Main Material
Phosphoric acid derivative

Application
Water treatment chemical, scale inhibitor, cleaning agent, metal ion chelator

About 1-Hydroxy Ethylidene-1,1-Diphosphoric Acid (HEDP)

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

CAS Number	2809-21-4
Appearance	Colorless or light yellow transparent liquid
Assay	58.0-62.0
pH	2 max
Iron content	10 max
Colour (APHA)	40 max
Colour (HAZEN)	40 max
Density	1.4 20Cg/cm3
Chloride	0.01 max
Packing	250 kgs
Use	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.
Storage	Storage for ten months in room shady and dry place.
Phosphoric acid (as PO43)%	2.0 max
Organic phosphonic acid (as PO43) %	0.8 max

Effectiveness as a Scale Inhibitor

HEDP is highly valued for its ability to prevent scale formation in water systems. Its strong chelating properties allow it to bind with metal ions, reducing water hardness and minimizing deposit buildup. This ensures the longevity and efficiency of industrial equipment such as boilers and cooling towers.

Versatility in Industrial Applications

This compound finds widespread use across numerous industries, including water treatment plants, detergent production, and textile dyeing processes. Its stabilizing properties make HEDP a preferred option for cleaning agents and as a corrosion control additive in critical operations.

Storage and Handling Recommendations

Store HEDP in a cool, well-ventilated, and dry location. Ensure that containers remain tightly sealed to prevent contamination or degradation. Although odorless and stable, proper storage extends shelf life and maintains chemical integrity for optimal industrial performance.

FAQs of 1-Hydroxy Ethylidene-1,1-Diphosphoric Acid (HEDP):

Q: How should 1-Hydroxy Ethylidene-1,1-Diphosphoric Acid (HEDP) be stored for best results?

A: HEDP should be kept in a cool, dry, and well-ventilated area. Always store it in tightly closed containers to avoid contamination and maintain its quality. Proper storage conditions prevent the compound from decomposing or becoming less effective.

Q: What are the main industrial applications of HEDP?

A: HEDP is widely used as a scale inhibitor and metal ion chelator in water treatment systems, cooling towers, boilers, the detergent industry, as well as in textile and dyeing processes. Its capacity to prevent the formation of scales extends equipment life and enhances operational efficiency.

Q: When should HEDP be utilized in a process?

A: HEDP is generally added during water treatment and cleaning operations where the risk of scale and metal ion buildup exists. Its timely application helps safeguard machinery and pipes from scale deposits, especially in cooling water and boiler systems.

Q: Where can HEDP be sourced in India?

A: HEDP is available from various suppliers, distributors, manufacturers, importers, retailers, traders, and wholesalers throughout India. It is important to obtain it from reputable sources to ensure high purity and compliance with industrial standards.

Q: What is the process of using HEDP in water treatment?

A: HEDP is added directly to water systems at calculated dosage levels. It binds with metal ions and inhibits the precipitation of scale-forming compounds, keeping pipelines and equipment clean. Regular monitoring ensures effectiveness and prevents overdosing.

Q: How does HEDP benefit water treatment and industrial systems?

A: By preventing scale formation and chelating metal ions, HEDP reduces maintenance costs, increases the lifespan of equipment, and ensures more consistent system performance. Its effective corrosion control also helps maintain high operational standards.

Q: What forms and grades are available for HEDP?

A: HEDP is supplied in both liquid and crystalline solid forms, at purities of 60% (liquid) and 98% (solid). It is typically offered as industrial or technical grade, making it suitable for demanding applications in large-scale industries.

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