Etidronic acid

Etidronic acid (CAS 2809-21-4), commonly known as HEDP or Oxyethylidenediphosphonic acid, is a phosphonate chelating agent used in water treatment, industrial cleaning, and personal care manufacturing.

Where is Etidronic acid used?

• Water treatment and oilfield operations: controls calcium carbonate and calcium sulfate scale
• Cooling towers, boilers, and injection systems: extends equipment service life
• Personal care: stabilizer in oxidative hair color and bleaching products
• Textile and paper processing: prevents metal-catalyzed degradation during bleaching and dyeing
• Industrial cleaning and detergents: disperses iron and hardness ions to improve wash performance
• It binds metal ions and inhibits scale formation, preventing corrosion and deposit buildup.

Commercial specifications

• Aqueous solution, most commonly at sixty percent active content for industrial use
• Higher-purity grades serve personal care and specialty formulation markets
• Bulk liquid supply in IBC containers or drums