HEDP 60% for Water Treatment and Detergents | Unilong

HEDP 60% Liquid

Unilong supplies HEDP 60% liquid for industrial water treatment and detergent formulations. This etidronic acid grade combines an active acid content of at least 60.0% with drum and IBC packaging for commercial orders.

Active acid: 60.0% min
Chloride: 100 ppm max
Packaging: 290 kg/drum or 1,250 kg/IBC

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What is Etidronic Acid HEDP CAS 2809-21-4

Hydroxyethylidene diphosphonic acid, also known as HEDP or etidronic acid, is an organophosphonate used in water-treatment and cleaning formulations. Its metal-ion sequestration and threshold scale-inhibition functions make it useful in circulating cooling-water programs and formulated detergents.

This product is an aqueous acid solution for industrial use. The molecular formula C₂H₈O₇P₂ and molecular weight of 206.03 g/mol refer to the HEDP molecule. Common chemical names include 1-hydroxyethylidene-1,1-diphosphonic acid and hydroxyethylidene diphosphonic acid.

Specification

Test item	Specification
Appearance	Clear liquid, colorless to pale tan, free from foreign matter
Odor	Slight to none
Active acid, %	60.0 min
Phosphorous acid (as PO₃³⁻), %	2.0 max
Phosphoric acid (as PO₄³⁻), %	0.8 max
Chloride as Cl, ppm	100 max
Sequestrant value as CaCO₃, mg/g of product at pH 11–12	500 min
pH of 1% solution at 20°C	2.0 max
Density at 20°C, g/cm³	1.440 min
Iron as Fe, ppm	35.0 max
Color, Hazen	80 max

The limits above define the listed HEDP 60% grade. Request a COA for the batch proposed for your order, together with any additional impurity or color requirements.

Applications

HEDP is used in scale- and corrosion-control formulations for circulating cooling-water systems. It is commonly combined with other water-treatment ingredients, including polycarboxylate dispersants, to match the operating conditions of the system.

Circulating Cooling Water

HEDP is used as a phosphonate component in industrial cooling-water treatment programs, particularly where calcium carbonate deposition is a concern. It can contribute to scale control and to the performance of a formulated corrosion-inhibition program.

Oilfield Water and Low Pressure Boilers

Industrial HEDP is also used in oilfield-water and low-pressure boiler treatment formulations. Its role is to help control mineral deposits within a treatment program selected for the water chemistry and operating conditions.

Detergents and Industrial Cleaning

HEDP serves as a chelating ingredient in detergent and industrial-cleaning formulations. It binds metal ions that can interfere with formulation performance and is used in cleaning systems for metallic and nonmetallic surfaces. Finished-product pH, water hardness and substrate compatibility govern the formulation choice.

Textile Processing and Peroxide Stabilization

HEDP is used as a peroxide stabilizer in textile processing and bleaching formulations. Metal-ion control is relevant where peroxide stability affects the process. The appropriate grade and concentration depend on the bleaching bath, peroxide level, temperature and overall stabilizer system.

Noncyanide Electroplating

HEDP is used as a complexing ingredient in non-cyanide electroplating formulations. The plating metal, bath pH and other bath ingredients determine its role in the complete formulation.

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HEDP for Treatment Formulations

HEDP 60% is a concentrated liquid raw material for water-treatment blends and cleaning products. Its working concentration varies with its role in the formulation, including scale inhibition, metal sequestration or corrosion-control support.

As an acidic concentrate, HEDP contributes to the blend’s pH and neutralization demand. Include the application and target pH in your enquiry so the quotation can address the relevant raw-material specification.

Package and Storage

Pack type	Product quantity per pack
Drum	290 kg
IBC	1,250 kg

Storage period: 12 months. Follow the product label and SDS for storage and handling conditions.

For shipment planning, include the preferred pack type, order quantity and destination port in the enquiry. Request the shipment packing details with the quotation; container loading depends on the selected package and transport arrangements.

Product Documents and Ordering

Request the product specification, an applicable batch COA and SDS with your enquiry. If your purchasing specification sets different iron, chloride, color or active-acid limits, send those requirements with the application details.

For a commercial quotation, provide the required quantity, packaging preference, destination and requested delivery timing. MOQ, current availability, dispatch timing and shipping terms are confirmed for the individual enquiry.

Frequently Asked Questions

Can I request a sample before a bulk order?

Send the quantity needed, intended application and delivery address. We will confirm sample availability, charges and shipping arrangements for your request.

What are the MOQ and current lead time?

MOQ and estimated dispatch timing depend on the requested quantity, pack type and destination. Include these details when requesting a quotation.

Can you quote against a lower iron or color limit?

Send your target limits and test method. We will confirm availability against your specification with the quotation.

Is HEDP acid interchangeable with HEDP sodium salts?

The acid and sodium salts differ in neutralization state, pH and concentration basis. A substitution requires formulation adjustment rather than an automatic one-for-one replacement.

Request an HEDP Quotation

Send your HEDP 60% requirement to Unilong with the order quantity, application, preferred packaging, destination and delivery target. Include your purchasing specification and required documents so the quotation can address the relevant grade and shipment terms.

Request an HEDP Quote