Disodium Salt of 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid (HEDP•Na2) is a high-performance 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 the buildup of scale. Its exceptional thermal stability allows it to maintain peak performance even in extreme environments up to 250°C, making it an essential component for high-temperature industrial systems.
Engineered for versatility, HEDP•Na2 remains stable under high pH values and is resistant to hydrolysis and decomposition under normal light and heat conditions. With superior chloride oxidation tolerance compared to other organophosphonic acids, it forms stable six-ring chelating compounds with calcium ions (Ca2+). When integrated with other water treatment chemicals, HEDP•Na2 demonstrates a powerful synergistic effect, ensuring optimal scale inhibition and threshold dissolution.
Detailed Parameters
| CAS No. | 7414-83-7 | Molecular Formula | C2H6O7P2Na2 |
|---|---|---|---|
| Molecular Weight | 250 | Appearance (Liquid) | Colorless to light yellow transparent liquid |
| Appearance (Solid) | 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 | Moisture (Solid) | 3.0-6.0% |
Key Advantages
Superior Corrosion Inhibition
Powerful chelation of Fe, Cu, and Zn ions prevents oxidative corrosion and maintains pipeline integrity.
Extreme Thermal Stability
Maintains high scale and corrosion inhibition efficiency even at temperatures reaching 250°C.
High pH Stability
Resistant to hydrolysis and decomposition under high alkaline conditions and standard light/heat.
Oxidation Tolerance
Better chloride oxidation tolerance than standard organophosphonic acids, ensuring longevity.
Threshold Dissolution
Provides obvious dissolution threshold effects, effectively removing existing mineral deposits.
Synergistic Efficiency
Works seamlessly with other water treatment chemicals to maximize overall system protection.
Product Gallery
Management Platforms
Industrial Cooling Systems
Optimized for circulating cool water systems in power plants and chemical industry.
Boiler Water Treatment
Ideal for medium and low pressure boilers to prevent scale buildup and corrosion.
Oilfield Pipeline Care
Protects oilfield water pipelines from mineral deposits and corrosive degradation.
Textile & Dyeing Industry
Used as a peroxide stabilizer and dye-fixing agent for high-quality fabric processing.
Metal Cleaning
Acts as a powerful detergent for both metal and non-metal surfaces in woven industry.
Electroplating Process
Serves as a critical chelating agent in non-cyanide electroplating applications.
Investment Return Comparison
| Feature | Standard Phosphonates | HEDP•Na2 Solution |
|---|---|---|
| Thermal Stability | Moderate | Excellent (Up to 250°C) |
| pH Resistance | Variable | High Stability/Low Hydrolysis |
| Oxidation Tolerance | Standard | Superior Chloride Tolerance |
| Chelating Power | Basic | High (Six-ring Complexes) |
| Maintenance Cost | Higher Frequency | Reduced via Synergistic Effect |
Frequently Asked Questions
HEDP•Na2 offers superior thermal stability up to 250°C and better chloride oxidation tolerance, making it more durable in harsh industrial environments compared to standard organophosphonic acids.
Liquid forms should be stored in a shady, dry room for up to twelve months. Solid forms should be stored under similar conditions for up to ten months.
Yes, HEDP•Na2 is widely used as a highly effective chelating agent in non-cyanide electroplating processes to ensure metal ion stability.
Absolutely. HEDP•Na2 is designed to work synergistically with other chemicals to enhance scale inhibition and overall system efficiency.
HEDP•Na2 is weakly acidic. Avoid contact with skin and eyes. In case of accidental splashing, rinse immediately with plenty of water.
It is extensively used in electric power, chemical industry, metallurgy, fertilizer production, textile dyeing, and oilfield water management.
