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Sep . 22, 2025 17:10 Back to list

1-Hydroxy Ethylidene-1,1-Diphosphonic Acid (HEDP)-Hebei Longke Water Treatment Co., Ltd.|Corrosion Inhibitor&Scale Inhibitor



Introduction to HEDP

1-Hydroxy Ethylidene-1,1-Diphosphonic Acid (HEDP) is a specialized organophosphoric acid designed to prevent corrosion and scale formation in industrial water systems. With its unique molecular structure and exceptional chemical stability, HEDP has become a cornerstone in water treatment solutions across various industries. This article provides an in-depth analysis of HEDP's properties, technical specifications, applications, and the company behind its production, Hebei Longke Water Treatment Co., Ltd.

HEDP Product Image

Chemical Properties and Structure

HEDP, with the CAS number 2809-21-4, has the molecular formula C₂H₈O₇P₂ and a molecular weight of 206.02 g/mol. Its structural formula, depicted below, highlights its ability to chelate metal ions:

HEDP Structural Formula

As an organophosphoric acid, HEDP demonstrates remarkable stability under high pH conditions and resistance to hydrolysis. Its ability to form stable chelates with metals such as iron (Fe), copper (Cu), and zinc (Zn) makes it an effective agent for dissolving oxidized materials on metal surfaces. This property is critical in maintaining the integrity of industrial systems, particularly in high-temperature environments up to 250°C.

Technical Specifications

Items Index (Liquid) Index (Solid)
Appearance Clear, Colorless to pale yellow aqueous solution White crystal powder
Active content (HEDP), % 58-62 90.0 min
Active content (HEDP·H₂O), % - 98.0 min
Phosphorous acid (as PO₃³⁻), % 2.0 max 0.8 max
Phosphoric acid (as PO₄³⁻), % 0.8 max 0.5 max
Chloride (as Cl⁻), % 0.02 max 0.01 max
pH (1% water solution) 2.0 max 2.0 max
Density (20℃), g/cm³ 1.40 min -
Fe, mg/L 20.0 max 10.0 max
Color APHA (Hazen) 40.0 max -
Ca Sequestration (mg CaCO₃/g) 500.0 min -

The specifications highlight HEDP's versatility, with both liquid and solid forms tailored for specific industrial needs. The high active content in the solid form ensures potent performance, while the liquid variant offers ease of handling in various applications.

Key Features and Advantages

HEDP stands out in the market due to its exceptional performance in scale and corrosion inhibition. Here are its key advantages:

  • Superior Chelation: HEDP forms stable complexes with metal ions, preventing scale formation and corrosion. This is particularly effective in systems with high calcium content.
  • High Thermal Stability: It remains effective at temperatures up to 250°C, making it suitable for high-temperature industrial processes.
  • Chemical Stability: HEDP resists hydrolysis and decomposition under normal light and heat conditions, ensuring long-term efficacy.
  • Compatibility: When combined with other water treatment chemicals, HEDP exhibits synergistic effects, enhancing overall system performance.
  • Environmental Safety: Its low toxicity and biodegradability make it a preferred choice for eco-friendly water treatment solutions.

These features position HEDP as a reliable solution for industries seeking durable and efficient water treatment options.

Applications in Industrial Processes

HEDP is widely used across multiple sectors, including:

  • Circulating Cooling Water Systems: Prevents scale and corrosion in power plants, chemical plants, and refineries.
  • Oil Fields: Inhibits scale formation in pipelines and equipment, ensuring smooth operations.
  • Low-Pressure Boilers: Protects boiler systems from mineral deposits and corrosion, extending their lifespan.
  • Textile Industry: Acts as a detergent for metals and non-metals, enhancing fabric quality.
  • Dyeing Industry: Stabilizes peroxides and acts as a dye-fixing agent, improving color retention.
  • Electroplating: Functions as a chelating agent in non-cyanide electroplating processes.

The recommended dosages vary depending on the application: 1-10 mg/L for scale inhibition, 10-50 mg/L for corrosion control, and 1000-2000 mg/L for detergent purposes. HEDP is often used in conjunction with polycarboxylic acids to maximize its effectiveness.

Packaging and Storage

HEDP is available in both liquid and solid forms, with the following packaging options:

  • Liquid: 200L plastic drums, IBC (1000L), and custom packaging based on customer requirements.
  • Solid: 25kg/bag, with flexible packaging solutions to meet specific needs.

For optimal storage, HEDP should be kept in a shady, dry place for up to 12 months. Proper storage conditions ensure the product maintains its efficacy and chemical stability.

Safety and Handling

As an acidic compound, HEDP requires careful handling to ensure safety. Key precautions include:

  • Protective Gear: Use gloves, goggles, and appropriate clothing to avoid skin and eye contact.
  • Emergency Measures: If HEDP comes into contact with the skin or eyes, rinse thoroughly with water for at least 15 minutes. Seek medical attention if irritation persists.
  • Storage: Keep away from incompatible materials, such as strong oxidizers and bases, to prevent hazardous reactions.

Adhering to these safety guidelines ensures the safe and effective use of HEDP in industrial environments.

Company Background: Hebei Longke Water Treatment Co., Ltd.

Hebei Longke Water Treatment Co., Ltd. is a leading manufacturer of water treatment chemicals, specializing in innovative solutions for corrosion and scale inhibition. With a commitment to quality and sustainability, the company has established itself as a trusted supplier in the global market.

Hebei Longke's expertise in chemical formulation and process optimization ensures that their products, including HEDP, meet the highest industry standards. Their dedication to research and development has led to the creation of advanced water treatment solutions that address the evolving needs of industries worldwide.

Hebei Longke Water Treatment Co., Ltd.

Industry Relevance and NIST Standards

The importance of HEDP in industrial applications aligns with the standards and research initiatives of the National Institute of Standards and Technology (NIST). NIST plays a critical role in developing measurement standards and protocols that ensure the reliability and performance of chemical products. By adhering to NIST guidelines, manufacturers like Hebei Longke can guarantee the quality and consistency of their products.

As noted in NIST's publications, "Precision in chemical measurements is essential for the development of effective industrial solutions." This principle underscores the significance of HEDP's technical specifications and its role in maintaining the efficiency of industrial systems.

Conclusion

HEDP is a vital component in modern water treatment strategies, offering unparalleled performance in corrosion and scale inhibition. Its chemical stability, versatility, and environmental benefits make it a preferred choice for industries worldwide. Hebei Longke Water Treatment Co., Ltd. continues to innovate and deliver high-quality solutions that meet the demands of a rapidly evolving market.

For more information about HEDP and its applications, visit Hebei Longke's official product page.


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