{"id":4456,"date":"2024-01-29T20:14:59","date_gmt":"2024-01-29T12:14:59","guid":{"rendered":"http:\/\/www.watercarechem.com\/?post_type=product&p=4456"},"modified":"2026-01-18T11:53:01","modified_gmt":"2026-01-18T03:53:01","slug":"hedp-antiscalant-corrosion-inhibitor","status":"publish","type":"product","link":"https:\/\/www.watercarechem.com\/it\/prodotto\/hedp-antiscalant-corrosion-inhibitor\/","title":{"rendered":"HEDP (Hydroxyethylidene Diphosphonic Acid) Effective Scale and Corrosion Inhibitor | CAS 2809-21-4"},"content":{"rendered":"

What is HEDP (Hydroxyethylidene Diphosphonic) Acid<\/strong><\/b>?<\/h3>\n

HEDP (Hydroxyethylidene Diphosphonic Acid) is a phosphonic acid compound that is widely used as a scale and corrosion inhibitor in water treatment applications. It is a clear, colorless liquid or crystalline solid with the chemical formula C2H8O7P2.<\/p>\n

It is highly effective in preventing the formation of scale and inhibiting corrosion in various water systems. It has excellent chelating properties, which means it can bind with metal ions, such as calcium, magnesium, and iron, forming stable complexes with them. By binding with these metal ions, HEDP prevents their precipitation and deposition as scale, helping to maintain the efficiency of heat transfer equipment, such as boilers and heat exchangers.<\/p>\n

In addition to scale inhibition, it also acts as a corrosion inhibitor. It forms a protective film on metal surfaces, which acts as a barrier, reducing the rate of corrosion by preventing direct contact between the metal and corrosive substances present in the water.<\/p>\n

HEDP is known for its stability over a wide range of pH levels and temperatures, making it suitable for use in various water treatment<\/a> applications<\/strong>. It is commonly used in industrial settings, including power plants, oil refineries, chemical processing plants, and water treatment systems for cooling towers and swimming pools.<\/strong><\/p>\n

HEDP solid is a high-purity product, suitable for extremely cold regions in winter; it is especially suitable as a cleaning agent<\/em><\/strong> for the electronics industry and as an additive<\/strong> for daily chemical products.<\/p>\n

Synonyms<\/strong>: HEDP; HEDP(A); HEDPA; Etidronic Acid; 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid
\nCAS No.<\/strong>: 2809-21-4
\nHS code<\/strong>: 29310000
\nActive content (HEDP)<\/strong>: \u226558-62% (liquid), \u226590% (solid)
\nPlace of origin<\/strong>: China
\nAppearance<\/strong>: colorless, odorless liquid or white crystalline particles.
\nMolecular formula<\/strong>: C2<\/sub>H8<\/sub>O7<\/sub>P2<\/sub><\/p>\n

\n

Key Features and Benefits:<\/h3>\n
    \n
  1. Unmatched Scale Inhibition:<\/strong><\/b> HEDP\u2019s chelating properties prevent the aggregation of metal ions, thwarting scale formation, and ensuring optimal equipment performance.<\/li>\n
  2. Corrosion Inhibition Excellence:<\/strong><\/b> Its ability to form a protective film on metal surfaces protects the equipment against corrosive substances, prolonging its lifespan.<\/li>\n
  3. Adaptable pH Stability:<\/strong><\/b> With consistent efficacy across a wide pH range, HEDP adapts to varying operational environments.<\/li>\n
  4. Thermal Robustness:<\/strong><\/b> High thermal stability of HEDP makes it suitable for systems operating at elevated temperatures without compromising its performance.<\/li>\n
  5. Exceptional Solubility and Compatibility:<\/strong><\/b> Its solubility and cooperative behavior with other water treatment chemicals<\/a> result in amplified water treatment effects.<\/li>\n
  6. Durable Complex Formation:<\/strong><\/b> The ability to form stable complexes with metals ensures the stability and effectiveness of HEDP in various applications.<\/li>\n
  7. Diverse Industrial Utility:<\/strong><\/b> Suitable for a myriad of applications, from cooling systems to domestic cleaning, making it a versatile steward of quality and efficiency.<\/li>\n<\/ol>\n

    Target Industries<\/h3>\n
      \n
    1. Water Treatment Industry:<\/strong><\/b> Ensuring the smooth operation and longevity of cooling towers, boilers, and heat exchangers.<\/li>\n
    2. Textile Industry:<\/strong><\/b> Providing metal ion control for consistent coloring and bleaching stabilization, paramount to fabric quality.<\/li>\n
    3. Industrial Cleaning Sector:<\/strong><\/b> Upgrading the cleaning efficacy of industrial cleaning products.<\/li>\n
    4. Pulp and Paper Industry:<\/strong><\/b> Rendering scale control and enhanced brightness, contributing vitally to paper product quality.<\/li>\n<\/ol>\n

      Detailed Industry Benefits<\/h3>\n
        \n
      1. In Water Treatment:<\/strong><\/b> By preventing scale and corrosion, HEDP saves on maintenance costs and minimizes operational disruptions in critical water systems.<\/li>\n
      2. In Textile Manufacturing:<\/strong><\/b> It performs as an essential agent in maintaining color fidelity and fabric integrity during the bleaching process.<\/li>\n
      3. In Industrial Cleaning:<\/strong><\/b> Its action as a sequestering agent improves cleaning effectiveness, leading to cleaner facilities and longer-lasting equipment.<\/li>\n
      4. In Pulp and Paper Production:<\/strong><\/b> HEDP contributes to higher quality paper products by preventing scale, improving brightness, and streamlining production processes.<\/li>\n<\/ol>\n

        Instructions for Use<\/h3>\n

        HEDP can be used for multiple purposes, such as a scale inhibitor, corrosion inhibitor, and cleaning agent. Here are the recommended usage concentrations for each application:<\/p>\n

          \n
        1. Scale Inhibitor:<\/strong> For preventing scale formation, it is generally recommended to use at a concentration of 1-10 mg\/L.<\/li>\n
        2. Corrosion Inhibitor:<\/strong> To protect against corrosion, the suggested concentration range is 10-50 mg\/L.<\/li>\n
        3. Cleaning Agent:<\/strong> When used as a cleaning agent, it is typically applied at a concentration of 1000-2000 mg\/L.<\/li>\n<\/ol>\n

          It is advisable to combine HEDP with polycarboxylic acid-based scale dispersants for enhanced performance.<\/p>\n

          For applications in other industries or specific scenarios, it is recommended to conduct experiments to determine the optimal dosage based on the desired results and system requirements.<\/p>\n

          Safety Precautions:<\/h3>\n

          As HEDP is an acidic substance, it is important to observe proper safety measures during handling.<\/p>\n

            \n
          1. Personal Protective Equipment:<\/strong> Wear appropriate personal protective equipment, such as gloves and safety goggles, to prevent skin and eye contact.<\/li>\n
          2. Avoid Contact:<\/strong> Avoid any direct contact. In case of accidental contact, promptly rinse the affected area with a generous amount of clean water.<\/li>\n
          3. Ventilation:<\/strong> Ensure proper ventilation in the working area to minimize exposure to HEDP fumes or vapors.<\/li>\n
          4. Handling and Spills:<\/strong> Handle with care to avoid spills. In case of a spill, contain and clean it up promptly using suitable inert absorbent materials. Dispose of the waste properly according to applicable regulations.<\/li>\n<\/ol>\n

            Packaging and Storage<\/h3>\n