Overview

Magnesium oxide (mag-NEE-see-um OK-side) is available commercially in several forms, depending on the way it is prepared and the use for which it is intended. Most forms can be classified as either "light" or "heavy" depending on particle size, purity, and method of production. It occurs in nature in the form of the mineral periclase. In its purest form, magnesium oxide is a colorless or white crystalline material or very fine powder, with no odor and a bitter taste.

Key Facts

Other Names:

Magnesia; calcined magnesia; magnesia ulba

Formula:

MgO

Elements:

Magnesium, oxygen

Compound Type:

Metallic oxide (inorganic)

State:

Solid

Molecular Weight:

40.30 g/mol

Melting Point:

2,825°C (5,117°F)

Boiling Point:

3,600°C (6,500°F)

Solubility:

Slightly soluble in water; soluble in most acids; insoluble in alcohol

How It Is Made

A number of methods are available for the preparation of magnesium oxide. Most methods begin with either...