Tetra Sodium Salt of 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid (HEDP·Na4), also known as Tetrasodium Etidronate, is a high-efficiency organophosphonic acid scale and corrosion inhibitor. Engineered for superior stability, it acts as a powerful chelating agent that forms stable complexes with metal ions such as Fe, Cu, and Zn, effectively dissolving surface oxides and preventing mineral buildup in challenging industrial environments.
This versatile chemical is widely utilized across power generation, metallurgy, the chemical industry, and fertilizer production. Whether applied in circulating cooling systems, medium-to-low pressure boilers, or oil field pipelines, HEDP·Na4 ensures optimal system longevity by providing exceptional scale inhibition for calcium carbonate and remaining effective at temperatures up to 250°C.
Detailed Parameters
| CAS No. | 29329-71-3 (x-Na), 3794-83-0 (4-Na) | Molecular Formula | C2H4O7P2Na4 |
|---|---|---|---|
| Molecular Weight | 294 | Appearance (Liquid) | Colorless to yellowish transparent liquid |
| Appearance (Solid) | White powder | Active Content (HEDP) | Liquid: 20.3-21.7% | Solid: 60.0% min |
| Active Content (HEDP·Na4) | Liquid: 29.0-31.0% | Solid: 85.0% min | Total Phosphoric Acid | Liquid: 18.4-20.4% | Solid: 55.0% min |
| pH (1% solution) | 10.0-12.0 | Density (20℃) | 1.26-1.36 g/cm3 (Liquid) |
Key Advantages
Superior Scale Inhibition
Provides exceptional prevention of calcium carbonate scale in boilers and cooling water systems.
High Thermal Stability
Maintains powerful scale and corrosion inhibition effects even under temperatures reaching 250°C.
Strong Chelating Power
Forms stable complexes with Fe, Cu, and Zn ions to dissolve metal surface oxides effectively.
Cold Weather Suitability
The solid powder form is ideal for use in winter and freezing regions due to its handling properties.
Multi-Industry Utility
Applicable in textile dyeing, non-cyanide electroplating, and municipal water cleaning.
Enhanced Stability
Acts as an efficient peroxide stabilizer and dye-fixing agent in professional dyeing industries.
Product Gallery
Management Platforms
Flexible Packaging
Available in 200L drums, 1000L IBC tanks, or 25kg bags to meet specific project needs.
Industrial Application
Optimized for electric power, chemical plant, and metallurgical water treatment systems.
Quality Control
Strict adherence to active content specifications for consistent chemical performance.
Safe Storage
Stable shelf life of ten months when stored in a shady, dry, and ventilated environment.
Logistics Efficiency
Streamlined supply chain for rapid delivery of both liquid and solid HEDP·Na4 variants.
Safety Protocol
Comprehensive safety guidance for handling alkaline materials to ensure operator protection.
Investment Return Comparison
| Performance Metric | Standard Scale Inhibitors | HEDP·Na4 (Sodium Salt) | Business Value |
|---|---|---|---|
| Temp. Resistance | Low to Medium | Up to 250°C | Lower Equipment Downtime |
| Metal Chelation | Basic | Advanced (Fe, Cu, Zn) | Reduced Pipe Corrosion |
| Cold Weather Use | Poor (Freezing Risk) | Excellent (Solid Form) | Year-round Operations |
| Application Range | Narrow | Broad (Textile to Oil) | Consolidated Sourcing |
| Cleaning Efficiency | Standard | High (Dissolves Oxides) | Reduced Cleaning Costs |
Frequently Asked Questions
HEDP·Na4 is the sodium salt form of HEDP. This modification makes it more suitable for specific alkaline environments and provides a solid powder option that is much easier to handle in freezing climates compared to liquid acids.
It is highly effective in the power, chemical, and metallurgical industries for cooling systems, as well as in the textile industry for peroxide stabilization and non-cyanide electroplating as a chelating agent.
Yes, HEDP·Na4 is specifically designed to maintain its scale and corrosion inhibition properties at high temperatures, remaining effective up to 250°C.
It should be stored in a dry, shady room. When kept under these conditions, the product remains stable for up to ten months.
Since HEDP·Na4 is alkaline, you should avoid direct contact with eyes and skin. In case of accidental splashes, rinse the affected area immediately with plenty of water.
Yes, it can form stable complexes with iron (Fe), copper (Cu), and zinc (Zn) ions, allowing it to effectively dissolve oxides on metal surfaces.
