DOWEX MONOSPHERE™ Ion Exchange Resins

DOWEX MONOSPHERE™ Ion Exchange Resins are recognized as the premium offering in the deashing of sweeteners, the chromatographic enrichment of high fructose corn syrup and sugar recovery in beet sugar plants, and condensate polishing mixed beds for nuclear power generation plants. The tight uniform particle size of the beads provides premium performance over standard-grade resins with Gaussian particle size distribution. Both cation and anion exchange resins in both gel and macroporous polymer structures are available.


DOWEX MONOSPHERE™ 550A OH is the premier, uniform particle size, gel, strong base anion exchange resin for condensate polishing applications in the nuclear and fossil power industry. It has high total exchange capacity, exceptional bead integrity and a distinguishable light color, providing exceptional stability and capacity in this application. The bead size uniformity of this anion resin and its smaller average particle size results in rapid exchange kinetics and helps provide excellent separability when used in a mixed bed with DOWEX MONOSPHERE™ 650C H Cation Resin. Together, these resins offer near perfect separation in mixed beds and the color distinction between the two resins allows easy visual confirmation of separation following backwash. It is ideally suited to the high flowrate demands commonly encountered in power plant condensate polishing systems. It is also extremely well suited to other mixed bed polishing applications.

Document Links:

Used In:

  • Nuclear power, regenerable condensate polishing
  • Fossil power condensate polishing
  • Mixed bed polishing of demineralized water


  • Superior physical stability
  • Good sulfate kinetics
  • Excellent separation characteristics
  • Low leachables


  • Asia Pacific
  • Europe
  • Latin America
  • North America