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      Codex®  Range of Phosphonates  
 
HEDP and its salts
Codex® 661 Codex® DS Codex® 7101
ATMP and its salts
Codex® 8503 Codex® 9403
DTPMPA and its salts
Codex® 4503 Codex® 4473 Codex® 5323
PBTC:_________________Salts of EDTMPA:
Codex® 551 Codex® 3315

Problems arising out of interference of the undesired metallic ions in the processes, the formation of scales and deposits in the equipment like heat exchangers etc. are frequently encountered in the industry.
The Codex range of phosphonates offers effective solutions to many of these problems with its array of diverse key properties. These products are available in acid form as well as in the form of sodium salts, with each molecule having distinct advantage for specific applications.

Key properties
  • Sequestration
    The multivalent metal ions like Calcium, Magnesium, Copper, Zinc etc. can be complexed with Codex at stoichometric levels, forming a stable water soluble complex that suppresses unwanted effects of metal ions in various processes.

  • Threshold effect
    The scalant mixture can be kept in a solution form by a low concentration of Codex (below the stoichiometric levels), exhibiting a threshold effect.

Codex inhibits precipitation of scales such as Ferric Hydroxide, Carbonates, Phosphates and Sulphates of Calcium, and Hydroxides of Aluminium, Copper and Iron (Ferric). 

  • Hydrolytic Stability
    Codex is highly stable and resistant to hydrolysis over a wide range of pH and temperatures unlike polyphosphates.

Therefore, Codex, offers extended shelf life to the formulations in which it is used. It maintains its performance in high temperature processes as well.

  • Deflocculation (Dispersion)
    Codex gets adsorbed on the growth sites of scalants. This hinders the growth of crystals from getting cluttered. Due to superior thermal and hydrolytic stability, Codex helps in keeping solids in a dispersed form for longer periods compared to polyphosphates.
     

  • Corrosion Control
    Codex
    in combination with Zinc Phosphate, Molybdate or Nitrate, offers synergistically enhanced corrosion inhibition in water systems compared to any of the individual components. These combinations also present a definitive alternative to chromate based systems, which are environmentally unacceptable.

  • Chlorine Stability
    In the industry, Chlorine is used as an oxidizing agent as well as a biocide. Codex 661 is stable in systems containing chlorine. The stability of Codex range of Phosphonates in systems containing Chlorine can be further improved by a formulation with Zinc.
     

  • Applications
    The Codex range of phosphonates are designed for: Cooling water treatment, Boiler water treatment, Soaps and Detergents, Textile processing, Bottle washing, Industrial & Institutional cleaners, Deflocculation of slurries, Antiscalant formulations for oilfields, Sea water evaporators, Reverse Osmosis & Sugar processing.

 
 
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