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Product Information, Characteristics & Applications

This product is a colourless to pale yellow clear liquid. HEDP is widely used as a sequestrant, chelating and deposit control agent, and provides excellent control of calcium and other metal salts (including iron and manganese) by acting as a strong crystal modifying agent and threshold inhibitor.

HEDP is a 60% active aqueous solution and is part of the Biphosphonic Acid Group. It is highly water soluble and stable under harsh conditions, which makes it ideal for water treatment. The main uses in the water treatment industry are, reverse osmosis formulation, cooling water treatment, boiler water treatment, swimming pools, scale and corrosion inhibitor.

Industries that HEDP are used in include

  • Industrial
  • Cleaning Products & Detergents
  • Engineering, Metal & Surface Treatment
  • Water Treatment

Other names

  • Hydroxy Ethylidene Diphosphonic Acid
  • Hydroxyethylidene -1, 1-Diphosphonic Acid
  • 1,1,1-Ethanetriol Diphosphonate
  • Ethane-1-Hydroxy-1,1-Diphosphonate
  • Etidronic Acid
  • Dequest
  • Briquest
  • Unihib 106
  • Didronel (in Pharmaceuticals)

Other common uses & industry applications are;

  • Industrial and household cleaners and detergents
  • Textile and paper bleaching
  • Pulp processing
  • Detergent for metal and non-metal in light woven industry
  • Oilfields
  • Dye fixing agent
  • Sugar processing
  • Metal finishing
  • Desalination
  • Petroleum secondary recovery

HEDP product quality & technical details

  • CAS Registry Number: 2809-21-4
  • EINECS: 220-552-8
  • Chemical formula: C2H8O7P2

HEDP hazard transport information:

  • Shipping name: corrosive liquid, acidic, organic, N.O.S. (1-Hydroxyethane-1,1-(Diphosphonic acid))
  • Un: 3265
  • Class: 8
  • Packing Group: III

HEDP product packaging

  • 25kg poly
  • 250kg drum
  • 1250kg IBC

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