Product Identification & Technical Summary
ZEELCHEM® 101 HEDP 60% is a high-performance phosphonate-based water treatment chemical containing 1-Hydroxyethylidene-1,1-diphosphonic acid (HEDP), also known as Etidronic Acid. With CAS No. 2809-21-4, HEDP 60% is widely used as a scale inhibitor, corrosion inhibitor and chelating agent in industrial water treatment and process applications.
ZEELCHEM® 101 is suitable for applications including circulating cooling water systems, low-pressure boiler water treatment, oilfield water systems, textile processing, peroxide stabilization, metal treatment and non-cyanide electroplating.
- Product Code: ZEELCHEM® 101
- Chemical Name: 1-Hydroxyethylidene-1,1-diphosphonic acid
- Common Name: HEDP 60% / Etidronic Acid
- CAS No.: 2809-21-4
- Molecular Formula: C₂H₈O₇P₂
- Molecular Weight: 206.02 g/mol
- Product Type: Phosphonate Water Treatment Chemical
- Supplier: ZEEL PRODUCT (India)
What is HEDP 60%?
HEDP 60% is an organophosphonate chemical used primarily for scale inhibition, corrosion control and metal-ion chelation. The chemical name is 1-Hydroxyethylidene-1,1-diphosphonic acid, commonly known as Etidronic Acid.
HEDP interacts with metal ions such as calcium, iron, copper and zinc and can help control unwanted mineral deposits and metal-related problems in industrial water systems. Because of its chelating and threshold-inhibition properties, HEDP 60% is commonly incorporated into water treatment formulations and industrial chemical programs.
Why Use ZEELCHEM® 101 HEDP 60%?
ZEELCHEM® 101 is designed for industrial applications requiring reliable phosphonate performance. Key characteristics include:
- Effective threshold scale inhibition against calcium carbonate and mineral scales
- Corrosion-control functionality when combined with zinc or other inhibitors
- Strong metal-ion chelation for iron, copper, and multivalent cations
- High calcium sequestration capability to prevent hardness precipitation
- Excellent chemical compatibility with selected water-treatment polymers (Polyacrylic Acid, Polymaleic Acid, Terpolymer)
- Application in circulating cooling-water towers and industrial circuits
- Application in low-pressure boiler systems and feed water programs
- Use in textile processing, peroxide stabilization, and bleaching formulations
- Use in oilfield produced water and secondary recovery treatment
- Use as a chelating agent in non-cyanide electroplating and metal surface treatment
HEDP 60% Technical Specifications
Below are the technical specifications for ZEELCHEM® 101 HEDP 60% manufactured and supplied by ZEEL PRODUCT:
| Parameter | Specification |
|---|---|
| Product Name | HEDP 60% |
| Brand | ZEELCHEM® |
| Product Code | ZEELCHEM® 101 |
| Chemical Name | 1-Hydroxyethylidene-1,1-diphosphonic acid |
| Common Name | Etidronic Acid |
| CAS Number | 2809-21-4 |
| Molecular Formula | C₂H₈O₇P₂ |
| Molecular Weight | 206.02 g/mol |
| Appearance | Clear, colorless to pale yellow aqueous solution |
| HEDP Active Content | 58.0–62.0% |
| pH, 1% Solution | ≤ 2.0 |
| Density at 20°C | 1.43–1.47 g/cm³ |
| Calcium Chelation Value | ≥ 525 mg CaCO₃/g |
| Chemical Classification | Organophosphonate |
| Primary Function | Scale inhibition, corrosion control and chelation |
| Country of Origin | India |
Note: Specifications should be confirmed against the current product TDS/COA supplied for the specific batch by ZEEL PRODUCT.
HEDP 60% Industrial Applications
HEDP 60% is used in a wide range of industrial chemical and water-treatment applications:
- Cooling Water Treatment: HEDP 60% can be used in circulating cooling-water treatment programs to help control mineral scale and corrosion-related problems on heat-transfer and metal surfaces.
- Boiler Water Treatment: HEDP 60% is used in selected low-pressure boiler-water treatment formulations for controlling scale-forming deposits. Treatment dosage should be determined according to boiler operating conditions and water chemistry.
- Oilfield Water Treatment: HEDP 60% can be incorporated into oilfield water-treatment programs where scale control and metal-ion management are required in produced water and injection wells.
- Textile Industry: In textile processing, HEDP 60% can function as a chelating agent and peroxide stabilizer in selected bleaching and dyeing formulations to prevent fabric staining.
- Electroplating: HEDP can be used as a chelating agent in non-cyanide electroplating applications and other metal-treatment processes.
- Industrial Water Treatment Formulations: HEDP 60% can be formulated with compatible polymers, phosphonates and other treatment chemicals to develop customized scale and corrosion-control programs.
- Metal-Ion Chelation: HEDP has strong complexing properties with selected metal ions, making it useful where control of calcium, iron, and other multivalent metal ions is required.
HEDP 60% Dosage & Dosing Guidance
The required HEDP 60% dosage depends on water quality, hardness, alkalinity, temperature, concentration cycles, metallurgy, operating conditions and the complete water-treatment formulation.
Typical Application Dosage Ranges
| Application Area | Typical Dosage Range* |
|---|---|
| Scale Inhibition (Cooling Water) | 1–10 mg/L (ppm) |
| Corrosion Inhibition (Circulating Systems) | 10–50 mg/L (ppm) |
| Selected Textile / Bleaching Applications | 1,000–2,000 mg/L (ppm) |
*These ranges are indicative and should not be treated as a universal treatment recommendation. Final dosage should be established through laboratory testing, water analysis, process conditions and the applicable technical formulation.
HEDP 60% Dosing Calculation
For water treatment dosing rate calculation:
Example Calculation: At a treatment dosage of 5 mg/L for 100 m³ of water:
100 m³ × 5 mg/L ÷ 1,000 = 0.50 kg
Therefore, the calculated chemical quantity is 0.50 kg of active treatment product equivalent, subject to the product concentration (60% solution) and actual dosing-program requirements. For continuous dosing systems, calculate pump settings using our B2B Chemical Dosing Calculator.
Important Technical Note: Actual HEDP dosage should be determined by a qualified water-treatment professional after reviewing the water analysis and operating conditions. Make sure to distinguish between active HEDP mass and commercial 60% aqueous solution volume.
HEDP 60% Compatibility & Synergy
HEDP 60% is commonly incorporated into multi-component water-treatment formulations. It exhibits excellent chemical synergy when combined with:
- Polyacrylic Acid (PAA) — Dispersant and scale modifier
- Polymaleic Acid (PMA) — Thermal scale inhibitor
- AA/AMPS Copolymer & Terpolymer — High-stress phosphate & silica dispersants
- PBTC 50% & DTPMPA — Complementary phosphonate scale control
- Zinc Salts & Azoles — Yellow metal corrosion inhibition
HEDP 60% + Polyacrylic Acid Synergy
Combining a phosphonate such as HEDP with a compatible polycarboxylic acid polymer provides complementary scale-control and dispersion functions. HEDP distorts scale crystal lattices, while Polyacrylic Acid keeps precipitated micro-crystals dispersed in solution, preventing thermal deposition on heat exchanger tubes.
HEDP 60% vs Other Phosphonate Chemicals
Different phosphonates are selected according to water chemistry, temperature, corrosion-control requirements, phosphorus limits and formulation compatibility:
HEDP vs ATMP
HEDP and ATMP 50% are both phosphonate-based water-treatment chemicals, but their chemical structures and application profiles differ. HEDP offers superior calcium carbonate scale control and thermal stability, whereas ATMP is highly effective for low-dosage threshold inhibition.
HEDP vs DTPMP
HEDP and DTPMPA are both used in scale and corrosion-control programs. DTPMPA is selected for barium sulfate and sulfate scale control in oilfields, while HEDP is widely used for cooling tower scale inhibition and metal-ion chelation.
HEDP vs PBTC
HEDP and PBTC 50% are phosphonate chemicals, but PBTC combines phosphonic-acid functionality with carboxylic-acid functionality. PBTC exhibits superior chlorine stability in high-oxidant environments compared to HEDP.
HEDP 60% Manufacturer & Supplier in India
ZEEL PRODUCT, under the ZEELCHEM® brand, manufactures and supplies industrial water-treatment chemicals including phosphonates, polymers, biocides, antiscalants and specialty chemicals.
ZEELCHEM® 101 HEDP 60% is supplied for industrial applications including water treatment, cooling-water systems, boiler treatment, textile processing, oilfield applications and electroplating. ZEEL PRODUCT has operated in the chemical industry since 2006 and serves industrial customers across India and international markets from Vadodara, Gujarat.
Bulk HEDP 60% Supply Enquiries
Product: ZEELCHEM® 101 HEDP 60%
Application: Industrial water treatment and process chemicals
Supply: Bulk drums (250 kg HDPE), IBC totes (1250 kg), and ISO tanks
Location: Vadodara, Gujarat, India
Documents Available: Certificate of Analysis (COA), Technical Data Sheet (TDS), and Safety Data Sheet (SDS)
HEDP 60% Frequently Asked Questions (FAQs)
What is HEDP 60%?
HEDP 60% is a concentrated aqueous solution of 1-Hydroxyethylidene-1,1-diphosphonic acid, also known as Etidronic Acid. It is primarily used as a scale inhibitor, corrosion-control chemical and chelating agent.
What is the chemical name of HEDP?
The chemical name is 1-Hydroxyethylidene-1,1-diphosphonic acid. HEDP is also commonly known as Etidronic Acid.
What is the CAS number of HEDP?
The CAS number of HEDP is 2809-21-4.
What is HEDP 60% used for?
HEDP 60% is used in cooling-water treatment, selected boiler-water treatment, oilfield water systems, textile processing, peroxide stabilization, electroplating and other industrial chemical formulations.
Is HEDP 60% a scale inhibitor?
Yes. HEDP is widely used as a threshold scale inhibitor for controlling mineral deposits in industrial water-treatment systems.
Is HEDP 60% a corrosion inhibitor?
HEDP can contribute to corrosion control and is commonly incorporated into scale-and-corrosion inhibition programs.
What is the dosage of HEDP 60%?
The dosage depends on water chemistry and the treatment objective. Typical ranges may include 1–10 mg/L for scale inhibition and 10–50 mg/L for corrosion-control applications, established through water analysis.
Can HEDP 60% be used in cooling water?
Yes. HEDP 60% is commonly used in circulating cooling-water treatment programs for scale and corrosion control.
Can HEDP 60% be used in boiler water treatment?
HEDP can be used in selected low-pressure boiler-water treatment programs. Dosage and compatibility should be established according to boiler conditions.
Can HEDP 60% be used in textile processing?
Yes. HEDP can be used as a chelating agent and peroxide stabilizer in selected textile bleaching and dyeing processes.
Can HEDP 60% be combined with Polyacrylic Acid?
Yes. HEDP can be formulated with compatible polycarboxylic-acid polymers such as Polyacrylic Acid to provide complementary scale-control and dispersion performance.
What is the appearance of HEDP 60%?
HEDP 60% is typically supplied as a clear, colorless to pale-yellow aqueous solution.
What is the density of HEDP 60%?
The published ZEELCHEM® 101 specification lists a density of approximately 1.43–1.47 g/cm³ at 20°C.
Where can I buy HEDP 60% in India?
HEDP 60% is available from ZEEL PRODUCT under the ZEELCHEM® 101 brand. Contact the company for bulk pricing, availability, packaging and technical documentation.
Who is a HEDP 60% manufacturer and supplier in India?
ZEEL PRODUCT supplies HEDP 60% under the ZEELCHEM® 101 brand for industrial water-treatment and process applications.