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98% HEDP 1-Hydroxyethylidene Diphosphonic Powder

Name: HEDP/1-Hydroxyethylidene-1,1-diphosphonic acid
CAS: 2809-21-4
Chemical formula: C2H8O7P2
Appearance: 98% white crystal powder
MOQ: No request
Availability:
Quantity:
  • HEDP 2809-21-4

  • SINOBIO

  • 3808940090


Product Overview


Sinobio’s 98% purity HEDP powder (CAS 2809-21-4), chemically known as 1-Hydroxyethylidene-1,1-diphosphonic acid, is a high-performance organophosphonic acid corrosion and scale inhibitor. With the molecular formula C₂H₈O₇P₂ and EINECS number 220-552-8, this white crystalline powder is engineered for superior stability and efficacy across diverse industrial applications.


Key Features


Exceptional Chelation Capacity: Effectively chelates with metal ions (Fe, Cu, Zn, etc.) to form stable complexes, dissolving oxide layers on metal surfaces and preventing scale formation.


High Temperature Resistance: Maintains optimal scale and corrosion inhibition performance even at temperatures up to 250°C, making it suitable for high-heat systems.


Chemical Stability: Resists hydrolysis under high pH conditions and remains stable under normal light and heat. It exhibits better tolerance to acids, alkalis, and chlorine oxidation compared to other organophosphonic acids/salts.


Synergistic Effects: Works efficiently with other water treatment chemicals (e.g., polycarboxylic acids) to enhance overall performance.


Versatile Form: The solid crystalline powder is ideal for winter or freezing regions. Its high purity enables use in electronic cleaning and daily chemical additives.


Technical Specifications


Items

Liquid Form Index

Powder Form Index

Appearance

Clear, colorless to pale yellow aqueous solution

White crystal powder

Active content (HEDP)

58.0-62.0%

≥90.0%

Active content (HEDP·H₂O)

--

≥98.0%

Phosphorous acid (as PO₃³⁻)

≤2.0%

≤0.8%

Phosphoric acid (as PO₄³⁻)

≤0.8%

≤0.5%

Chloride (as Cl⁻)

≤0.02%

≤0.01%

pH (1% water solution)

≤2.0

≤2.0

Density (20℃) g/cm³

≥1.40

--

Fe (mg/L)

≤20.0

≤10.0

Ca sequestration (mg CaCO₃/g)

≥500.0

--


Applications & Usage


Water Treatment Industry

  • HEDP powder is widely used as a scale and corrosion inhibitor in:

  • Circulating cooling water systems (power, chemical, metallurgy, and fertilizer industries).
  • Oil fields and low-pressure boilers, preventing scale buildup in pipelines and equipment.

  • Light textile industry: Acts as a metal and non-metal cleaner.

  • Dyeing industry: Functions as a peroxide stabilizer and dye-fixing agent, improving color fastness and process stability.


Industrial & Medical Applications

Electroplating: Serves as a chelating agent in cyanide-free electroplating processes, ensuring smooth and uniform plating.

Electronics: High-purity grade is used as a cleaning agent for electronic components, removing oxides and contaminants without damaging sensitive parts.

Medical Field: Acts as a carrier for radioactive elements, supporting tumor detection and diagnostic procedures.


Recommended Dosage


  • Scale inhibitor: 1-10 mg/L

  • Corrosion inhibitor: 10-50 mg/L

  • Detergent: 1000-2000 mg/L

  • For optimal results, blend with polycarboxylic acid-based additives.


Packaged in 25kg bags with no minimum order quantity, Sinobio’s HEDP powder (CAS 2809-21-4) is a reliable choice for industries seeking high-performance water treatment and metal protection solutions. Contact us for bulk orders or technical support.


 HEDP Powder CAS 2809-21-4   HEDP Powder CAS 2809-21-4    HEDP Powder CAS 2809-21-4
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