Product Overview
Disodium Salt of 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid (HEDP•Na2) is a high-performance organophosphonic acid corrosion inhibitor designed for critical industrial water systems. It excels in chelating metal ions such as Fe, Cu, and Zn, effectively dissolving oxidized materials and providing superior scale inhibition and corrosion protection even in extreme environments up to 250°C.
Engineered for stability, HEDP•Na2 remains robust under high pH values and resists hydrolysis, light, and heat decomposition. Its exceptional tolerance to chloride oxidation and alkaline conditions makes it a superior choice compared to standard organophosphonic acids, especially when utilized in synergistic formulations with other water treatment chemicals to maximize efficiency.
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 Content | 3.0-6.0% (Solid) |
Key Advantages
High-Temp Stability
Maintains powerful scale and corrosion inhibition effects even under extreme temperatures reaching 250°C.
Chemical Resilience
Stable under high pH values and resistant to hydrolysis, light, and heat decomposition over time.
Superior Chelation
Forms six-ring chelating compounds with metal ions, particularly effective with Ca2+, Fe, Cu, and Zn.
Oxidation Tolerance
Offers better chloride oxidation and acid/alkaline tolerance than other organophosphonic acids.
Synergistic Effect
Works seamlessly with other water treatment chemicals to enhance overall system protection.
Versatile Application
Applicable across power, chemical, metallurgy, fertilizer, and textile industries.
Product Gallery
Management Platforms
Industrial Cooling
Optimized for circulating cool water systems in power and chemical plants.
Boiler Maintenance
Prevents scale buildup in medium and low pressure boiler systems.
Oilfield Pipelines
Acts as a high-efficiency corrosion inhibitor for oilfield water transport.
Textile Detergents
Used as a professional detergent for both metal and non-metal fibers.
Dyeing Process
Serves as a peroxide stabilizer and dye-fixing agent for quality coloring.
Electroplating
Provides essential chelating functions in non-cyanide electroplating baths.
Investment Return Comparison
| Performance Metric | Standard Organophosphonics | HEDP•Na2 Solution |
|---|---|---|
| Thermal Stability | Moderate | Excellent (up to 250°C) |
| Chloride Tolerance | Standard | High Tolerance |
| Chelation Strength | General | Superior (6-ring compounds) |
| pH Range Stability | Limited | Broad/High pH Stable |
| Maintenance Cost | Higher (Frequent) | Lower (Extended Cycles) |
Frequently Asked Questions
HEDP•Na2 is the disodium salt form, offering better solubility and stability in alkaline environments compared to the acid form, making it more suitable for specific industrial water treatments.
Yes, HEDP•Na2 is specifically designed to maintain scale and corrosion inhibition effects even under temperatures as high as 250°C.
Liquid form should be stored in a shady, dry room for up to 12 months. Solid form should be stored similarly for up to 10 months.
Absolutely. It is designed to work synergistically with other chemicals to improve threshold effects and scale inhibition.
HEDP•Na2 is weakly acidic. Avoid contact with eyes and skin. If contact occurs, rinse immediately with plenty of water.
It is widely used in electric power, chemical manufacturing, metallurgy, fertilizer production, and the textile dyeing industry.
