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Magnesium Oxide MgO is an inorganic substance with the chemical formula MgO, an oxide of magnesium, an ionic compound. It is a white solid at room temperature. Magnesium Oxide MgO exists in nature in the form of periclase and is the raw material for smelting magnesium. Magnesium Oxide MgO has high fire-resistant and insulating properties. It can be converted into crystals by burning at a high temperature above 1000°C, and it will become dead-burned Magnesium Oxide MgO or sintered Magnesium Oxide MgO when it rises to 1500-2000°C.

Magnesium Oxide MgO is divided into light Magnesium Oxide MgO and heavy Magnesium Oxide MgO. Lightweight and loose, it is a white amorphous powder. Odorless, tasteless and non-toxic. Density 3.58g/cm3. Insoluble in pure water and organic solvents, the solubility in water increases due to the presence of carbon dioxide. Soluble in acid and ammonium salt solution. It is converted into crystals by high temperature burning. In case of carbon dioxide in the air, magnesium carbonate double salt is formed. Heavy volume compact, white or beige powder. It is easy to combine with water, and it is easy to absorb moisture and carbon dioxide when it is exposed to the air. It is easy to gel and harden when mixed with magnesium chloride solution.