Disodium Hydroxyethylidene Diphosphonate HEDP·Na2
HEDP·Na₂ Disodium Salt - Advanced scale and corrosion inhibitor for industrial water treatment. Exceptional thermal stability up to 250°C with superior chemical resistance.
HEDP·Na₂ Disodium Salt - Advanced scale and corrosion inhibitor for industrial water treatment. Exceptional thermal stability up to 250°C with superior chemical resistance.
Product Name: 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid Disodium Salt (HEDP·Na₂)
CAS Number: 7414-83-7
Molecular Formula: C₂H₄O₇P₂Na₂
Molecular Weight: 250 g/mol
Synonyms: Disodium hydroxyethylene diphosphonate; Sodium etidronate; HEDP 2Na
HEDP·Na₂ is an advanced organic phosphonic acid scale and corrosion inhibitor engineered for exceptional performance in demanding water treatment applications. This highly effective compound forms stable complexes with various metal ions including iron, copper, and zinc, while demonstrating remarkable thermal stability with consistent performance at temperatures up to 250°C. Its unique molecular structure provides excellent resistance to hydrolysis and decomposition under extreme pH conditions and photothermal exposure. With superior acid-alkali resistance and chlorine oxidation stability compared to other organic phosphonates, HEDP·Na₂ delivers reliable scale inhibition through six-ring chelate formation with metal ions, particularly calcium, exhibiting significant threshold effects and ideal synergistic performance when combined with other water treatment agents.
Exceptional Thermal Stability: Maintains performance integrity at temperatures up to 250°C
Superior Chemical Resistance: Excellent stability under high pH conditions and chlorine exposure
Effective Metal Chelation: Forms stable complexes with iron, copper, zinc and other metal ions
Enhanced Scale Inhibition: Excellent calcium scale prevention through six-ring chelate formation
Synergistic Performance: Ideal compatibility and enhanced effects with other water treatment agents
Oxide Dissolution Capability: Effectively dissolves metal surface oxides
Broad Application Range: Suitable for various industrial water systems and conditions
| Parameter | Liquid Form | Solid Form |
|---|---|---|
| Appearance | Colorless to light yellow transparent liquid | White powder |
| Active Content (as HEDP), % ≥ | 16.5 | 74.0-79.0 |
| Active Content (as HEDP·Na₂), % ≥ | 20.0 | ≥ 90.0 |
| Orthophosphate (as PO₄³⁻), % ≤ | -- | 0.5 |
| Phosphite (as PO₃³⁻), % ≤ | -- | 1.5 |
| Iron (Fe²⁺), mg/L ≤ | -- | 20.0 |
| Density (20°C), g/cm³ | 1.12-1.22 | -- |
| pH (1% aqueous solution) | 4.0-6.0 | 4.0-6.0 |
*Complies with HG/T2839-2010 standards. Specifications may vary between production batches.*
HEDP·Na₂ is engineered for excellence across multiple industrial sectors:
Industrial Cooling Systems: Power, chemical, metallurgical, and fertilizer industry circulating water
Boiler Water Treatment: Scale and corrosion inhibition in medium and low-pressure boilers
Oil & Gas Industry: Oilfield water injection and pipeline protection
Textile Processing: Metal and non-metal cleaning applications
Bleaching & Dyeing: Peroxide stabilizer and color fixing agent
Electroplating Industry: Complexing agent in cyanide-free electroplating
General Industrial: Various water treatment and metal protection applications
HEDP·Na₂ demonstrates excellent synergistic effects when combined with other water treatment agents. Optimal performance is achieved through proper formulation and dosage adjustment based on specific water chemistry and system parameters. The product maintains stability and effectiveness across various operating conditions.
Liquid Form: 30 kg and 250 kg plastic drums
Solid Form: 25 kg polyethylene-lined woven bags
Custom Packaging: Available according to customer requirements
Storage: Store in cool, dry, well-ventilated area
Shelf Life: 12 months from production date when stored properly
Handling: Protect from moisture and extreme temperatures
HEDP·Na₂ is an alkaline substance. Appropriate personal protective equipment must be worn during handling, including chemical-resistant gloves and safety glasses. Avoid contact with skin, eyes, and clothing. In case of contact, immediately flush with plenty of water and seek medical attention if necessary. For comprehensive safety information, consult the Safety Data Sheet (SDS).
[ Safety Data Sheet (SDS)]
[ Technical Data Sheet (TDS)]
[ Certificate of Analysis (COA)]
Contact our technical team to request complete documentation package
Evaluate HEDP·Na₂ performance in your specific application. Contact us to request a complimentary sample and technical consultation.
Our team of water treatment specialists provides:
Customized formulation recommendations
Application-specific dosage guidance
Compatibility testing services
Technical consultation and troubleshooting
Performance optimization services
Quality Assurance: All products undergo rigorous quality control testing to ensure consistent performance and reliability. Each batch is accompanied by a Certificate of Analysis guaranteeing specification compliance.
Regulatory Compliance: HEDP·Na₂ meets international standards for water treatment chemicals and environmental regulations.
Disclaimer: The information provided is based on current knowledge and believed to be accurate. Users should conduct appropriate testing to determine suitability for specific applications. All products are supplied subject to our standard terms and conditions of sale.
