Magnesium oxides MagChem® 10 (all grades)

Hard Burned Technical Grade Magnesium Oxides

DESCRIPTION MagChem® 10 are high purity technical grades of magnesium oxide produced from magnesium-rich brine. They have relatively high bulk density and low reactivity. The granular grades are essentially dust free.


USES Milled MagChem® 10 grades have a combination of low reactivity, high purity and fine particle size, which makes them suitable for the production of magnesium salts, particularly in reactions with strong acids. They also find applications in fibreglass, aluminium metal processing and fuel additives.

Screened MagChem® 10 products are widely used as a raw material in manufacturing refractories and ceramic products.

COMPOSITION Typical Specification
Magnesium Oxide, MgO                     % 98.2 97.0 min.
Calcium Oxide, CaO                           % 0.90 1.00 max.
Silica, SiO2                                          % 0.40 0.50 max.
Iron Oxide, Fe2O3                               % 0.20 0.30 max.
Aluminium Oxide, Al2O3                       % 0.10 0.20 max.
Chloride, Cl                                        % 0.01 0.02 max.
Sulphate, SO32-                                   % 0.01 0.02 max.
Loss on Ignition                                  % 0.25 0.50 max.


PHYSICAL PROPERTIES MagChem® 10 grades are available in a wide variety of screened and milled sizes, from a powder -325 mesh to a granular 6 x 16 mesh.

Loose bulk densities range from 65 to 120 lb/ft3 (lb/ft3 – pound per cubic foot)
(1,04 to 1,92 g/cm3)

                  Screened Grades              Milled Grades
Grade  Top Size   Bottom Size  Grade   Top Size Median Particle Size
% passing, min. % passing, max. % passing, min. microns
   6 x 16 98   -6 mesh 10        -16 mesh     -20*   96    -20 mesh            50
 12 x 40 95 -12 mesh 10        -40 mesh   -200   95  -200 mesh            10
  PR-30 96 -16 mesh 15      -100 mesh   -325   96  -325 mesh            10
 -325S   99  -325 mesh              9


PACKAGING Available in 25 kg multi-walled bags and big bags on shrink wrapped pallets, on request.
* Bulk carloads and truckloads only.


MagChem® is a trademark of Martin Marietta Magnesia Specialties, LLC


This product is produced by Martin Marietta Magnesia Specialties, LLC and distributed in Poland by “GrayWolf” W.Szwaja in cooperation with M.A.F. Magnesite B.V.



Notice: The information contained herein is, to the best of our supplier’s knowledge and belief, accurate. Any recommendations or suggestions made are without warranty or guarantee of results since conditions of handling and of use are beyond our control; we therefore, assume no liability for loss or damage incurred by following these suggestions. Seller warrants only that this product will meet the specifications set forth. Any other representation or warranty, either express or implied, is specifically disclaimed including warranties of fitness for a particular purpose and of merchantability. Seller’s and manufacturer’s only obligation shall be to replace such quantity of the product proved to be defective. Before using, user shall determine the suitability of the product for user’s intended application and user assumes all risk and liability whatsoever in connection therewith. Neither seller nor manufacturer shall be liable in tort, contract or under any theory for any loss or damage, incidental or consequential, arising out of the use of or the inability to use the product.