Magnesium Oxide
Calcined magnesia for expansive cementing and acid neutralization.
Magnesium oxide's reactivity is set by its calcination temperature, and that single variable determines what it is good for. Lightly burned MgO reacts quickly and buffers pH; hard-burned MgO reacts slowly and controls expansion in cement. Specifying the right grade matters more with this material than with almost anything else we supply.
Typical Specifications
What you're buying.
| Property | Value |
|---|---|
| Chemical formula | MgOPER STANDARD |
| Grades available | Light-burned · Hard-burnedTYPICAL — CONFIRM |
| MgO content | 90% minimum typicalTYPICAL — CONFIRM |
| Appearance | White to buff powderTYPICAL — CONFIRM |
| Loss on ignition | 5.0% maximum typicalTYPICAL — CONFIRM |
| Fineness, passing 200 mesh | 90% minimum typicalTYPICAL — CONFIRM |
Per standard values are requirements of the cited specification. Typical values reflect commercial norms and should be confirmed against the certificate of analysis for your specific shipment.
Principal Industrial Uses
Where it's used, and why.
Cementing & Concrete
Expansive additive that compensates for shrinkage in cement systems, and a pH buffer in specialty cementing formulations.
Wastewater Treatment
Neutralizes acidic effluent and precipitates heavy metals with less risk of pH overshoot than caustic soda.
Agriculture & Feed
Magnesium supplement in animal feed rations and a soil amendment for magnesium-deficient ground.
Related Minerals
Often ordered alongside Magnesium Oxide.
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