What is KR-445

HEDP•Na4, the sodium salt of Hydroxyethylidene Diphosphonic Acid (HEDP), is a highly effective scale and corrosion inhibitor used across a variety of industrial applications. Here’s a detailed overview of its properties and uses:

  1. Scale Inhibition: HEDP•Na4 is particularly effective as a scale inhibitor for calcium carbonate, preventing its deposition in various water systems.
  2. Applications:
    • Low Pressure Boiler Water Systems: It is used to prevent scale formation in boiler water, which can reduce efficiency and cause operational issues.
    • Circulating Water Systems: HEDP•Na4 helps maintain the clarity and efficiency of water in circulation systems by inhibiting scale buildup.
    • Industrial and Municipal Cleaning Water Systems: It is used to prevent scale in water systems used for cleaning purposes in both industrial and municipal settings.
    • Swimming Pools: HEDP4Na can be used in swimming pools to prevent scale formation on pool surfaces and equipment.
  3. Physical Form: The solid form of HEDP•Na4 is a white powder that is soluble in water.
  4. Deliquescent Property: It is easily deliquescent, which means it can absorb moisture from the air. This property makes it suitable for use in environments where humidity is high, such as winter and freezing districts.
  5. Chemical Nature: As an organophosphonic acid scale and corrosion inhibitor, HEDP•Na4 can form stable complexes with metal ions like iron (Fe), copper (Cu), and zinc (Zn).
  6. Corrosion Inhibition: It can dissolve oxides on metal surfaces, providing protection against corrosion.
  7. Temperature Stability: HEDP•Na4 has good scale and corrosion inhibition effects up to temperatures of 250°C, making it suitable for high-temperature applications.
  8. Widespread Use:
    • Circulating Cool Water Systems: It is widely used in these systems to prevent scale and corrosion.
    • Medium and Low Pressure Boilers: HEDP•Na4 is used in boiler systems to maintain efficiency and protect against scale and corrosion.
    • Oil Field Water Pipelines: It serves as a scale and corrosion inhibitor in oil field operations.
  9. Industrial Fields: HEDP•Na4 is used in various industries such as electric power, chemical, metallurgy, and fertilizer production.
  10. Light Woven Industry: In this industry, HEDP•Na4 is used as a detergent for both metal and nonmetal surfaces.
  11. Dyeing Industry: It functions as a peroxide stabilizer to prevent the breakdown of bleaching agents and as a dye-fixing agent to improve dye adherence to fabrics.
  12. Non-Cyanide Electroplating: HEDP•Na4 is used as a chelating agent in electroplating processes that do not use cyanide, helping to bind and remove metal ions.

HEDP•Na4’s versatility, effectiveness, and stability make it a valuable compound in industrial water treatment and other applications where scale and corrosion control are essential.

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ADD: No.1, Fuqian South Road, Xuecheng Chemical Industrial Park, Xuecheng District, Zaozhuang City, Shandong Province, China

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