Disodium Salt of 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid (HEDP•Na2) is a high-efficiency organophosphonic acid corrosion inhibitor designed for industrial water treatment. It excels in chelating metal ions such as Fe, Cu, and Zn, effectively dissolving oxidized materials and preventing scale accumulation. With exceptional stability under high pH values and resistance to hydrolysis, it provides superior protection in demanding environments.
Engineered for extreme performance, HEDP•Na2 remains stable and effective even at temperatures reaching 250℃. Its superior chloride oxidation tolerance and stability under normal light and heat conditions make it a preferred choice for critical industrial systems. When integrated with other water treatment chemicals, it produces significant synergistic effects, optimizing overall system efficiency and equipment longevity.
Detailed Parameters
| CAS No. | 7414-83-7 | Molecular Formula | C2H6O7P2Na2 |
|---|---|---|---|
| Molecular Weight | 250 | Appearance | Colorless liquid / White powder |
| Active Component (HEDP) | 16.5% min (Liq) / 74.0-79.0% (Sol) | Active Content (HEDP•Na2) | 20.0% min (Liq) / 89.8% min (Sol) |
| Density (20℃) | 1.12-1.22 g/cm3 (Liquid) | PH (1% Solution) | 4.0-6.0 |
| Iron (Fe) Content | Max 20 mg/L (Solid) | Moisture | 3.0-6.0% (Solid) |
Key Advantages
High Temp Stability
Maintains excellent scale and corrosion inhibition performance even under extreme temperatures up to 250℃.
Chemical Stability
Stable under high pH values and highly resistant to hydrolysis, light, and heat decomposition.
Strong Chelating
Forms robust six-ring chelating compounds with metal ions, specifically Ca2+, in water systems.
Oxidation Tolerance
Offers superior acid/alkaline and chloride oxidation tolerance compared to other organophosphonic acids.
Threshold Effect
Demonstrates obvious dissolution threshold effects for highly efficient scale inhibition.
Synergistic Action
Works seamlessly with other water treatment chemicals to enhance overall corrosion protection.
Product Gallery
Management Platforms
Cooling Systems
Optimized for circulating cool water systems in power plants and chemical industries.
Boiler Treatment
Effective scale control for medium and low pressure boiler systems.
Oil Field Pipelines
Protects oil field water pipelines from corrosion and mineral buildup.
Textile Industry
Used as a high-performance detergent for both metal and non-metal materials.
Dyeing Processes
Functions as a peroxide stabilizer and dye-fixing agent for quality consistency.
Electroplating
Acts as a precise chelating agent in non-cyanide electroplating applications.
Investment Return Comparison
| Performance Metric | Standard Inhibitors | HEDP•Na2 | Benefit |
|---|---|---|---|
| Thermal Stability | Moderate | Up to 250℃ | Lower Maintenance |
| pH Adaptability | Limited | High Stability | Versatile Use |
| Chelating Power | Basic | Six-Ring Compound | Faster Descaling |
| Oxidation Resistance | Low | Excellent | Longer Lifespan |
| Operational Cost | Higher (Frequent) | Lower (Efficient) | Reduced Downtime |
Frequently Asked Questions
HEDP•Na2 is widely used as a scale and corrosion inhibitor in circulating cooling water systems, medium/low pressure boilers, oil field pipelines, textile detergents, and as a chelating agent in non-cyanide electroplating.
Unlike many organic inhibitors, HEDP•Na2 is exceptionally stable, maintaining its scale and corrosion inhibition properties even at temperatures as high as 250℃.
Yes, it is highly compatible. In fact, using HEDP•Na2 in combination with other water treatment agents typically results in superior synergistic effects for better system protection.
Liquid forms are stored for 12 months and solid forms for 10 months. Both should be kept in a shady, dry room to maintain stability.
HEDP•Na2 is weakly acidic. While not highly corrosive, it should not come into contact with eyes or skin. If contact occurs, rinse immediately with plenty of water.
The dissolution threshold effect means the product can effectively inhibit the precipitation of scale even at concentrations significantly lower than the stoichiometric amount of the scale-forming ions.
