Pulp & Paper


Martin Marietta Magnesia Specialties provides magnesium hydroxide for use in the production of paper products.



CellGuard® magnesium hydroxide functions as a cellulose protector and an alkali in mechanical pulp peroxide bleach systems, as well as in the oxygen delignification and extraction stages of chemical pulp bleaching.

Technical Data Sheets

CellGuard® MH

CellGuard® OP

Common Applications

  • Mechanical pulp
  • Chemical pulp


Mechanical Pulp Bleaching Chemical Pulp Bleaching
Significantly lowers bleach chemical costs by eliminating or reducing caustic soda and sodium silicate usage and by yielding higher residual peroxide for potential reuse Reduces chemical costs by eliminating magnesium sulfate usage in oxygen delignification and extraction stage bleaching
Reduces potential for silicate scaling and oxalate scaling Lowers caustic soda, peroxide and/or chlorine dioxide usage in chemical pulp bleaching
Lowers BOD/COD up to 40% Maintains brightness and physical properties
Improves pulp yield as indicated by BOD/COD reduction
Reduces anionic trash as measured by conductivity up to 40%
Maintains brightness and physical properties

For more information regarding your application or to place an order, please call 800-648-7400 (inside the U.S.) or +1-410-780-5500. Or, Contact Us with your questions.