Magnesium oxide (chemical formula: MgO) is an oxide of magnesium, an ionic compound.
It is a white solid at room temperature. Magnesium oxide exists in nature in the form of magnesia and is the raw material for magnesium smelting.
Character
White amorphous powder. Odorless, tasteless and non-toxic. Because preparation method is different, have light qualitative and heavy qualitative cent. It has strong refraction in the visible and near-ultraviolet light range. Open air is easy to absorb water and carbon dioxide and gradually become basic carbonic acid, light than heavy quality faster, combined with water to produce magnesium hydroxide, a slightly alkaline reaction, saturated aqueous solution pH10.3. However, it is easily soluble in dilute acids and extremely slightly soluble in pure water. The presence of carbon dioxide increases its solubility. It is a mild catalyst. It's insoluble in ethanol. Relative density (d254)3.58. Melting point is 2852 ℃. The boiling point of 3600 ℃.
Chemical properties                                                             
Magnesium oxide is a basic oxide, has the common property of basic oxide, belongs to the gels exposed in the air, easy to absorb water and carbon dioxide and gradually become basic magnesium carbonate, light product is faster than the heavy product, combined with water to produce magnesium hydroxide, slightly alkaline reaction, saturated water solution PH is 1.03. Soluble in acids and amines, but insoluble in water, the solution is alkaline. It's insoluble in ethanol. Slowly interacting with water, magnesium hydroxide is strongly refracted in the visible and near-ultraviolet light.
Application field   
Magnesium oxide products are used in agriculture, animal husbandry, chemical industry, papermaking, metallurgy, environmental protection and other industries. Light burning magnesium oxide and ammonium chloride aqueous solution with a certain proportion, can be gelatinized and hardened into a certain physical and mechanical properties of the hardening body, known as magnesite cement. Magnesite cement as a new type of cement, has the advantages of light weight, high strength, fire insulation, energy saving and environmental protection, can be widely used in building materials, municipal, agricultural, machinery and other fields.


Light burning magnesia index

Particle index of lightly burnt magnesium oxide fertilizer

High purity magnesium oxide index

Magnesium carbonate index