85-90-92 magnesium oxide

Magnesium oxide (chemical formula: MgO) is an oxide of magnesium, an ionic compound. It is a white solid at room temperature. Magnesia exists in nature in the form of periclase and is the raw material for magnesium smelting.

White fine powder. Odorless. Due to different preparation methods, there are light weight and heavy weight. It has strong refractivity in the visible and near ultraviolet light range. Exposed air is easy to absorb water and carbon dioxide and gradually becomes basic magnesium carbonate. Light weight is faster than heavy weight. It combines with water to form magnesium hydroxide, which is slightly alkaline. The pH of saturated aqueous solution is 10.3. However, it is extremely soluble in dilute acid and slightly soluble in pure water, and its solubility is increased due to the presence of carbon dioxide. Insoluble in ethanol. Relative density (d254) 3.58. The melting point is 2852 ℃. Boiling point 3600 ℃.