Component for the production of magnesium carbonate and magnesium hydroxide

White crystals, density 3.037g/cm³. At 500°C significantly and at 650°C completely decomposes to MgO and CO₂. The solubility of magnesium carbonate in water is negligible (22mg/l at 25°C) and decreases with increasing of temperature.

At saturation by CO₂ of aqueous suspension MgCO₃ dissolves due to formation of hydrogen Mg(HCO₃)₂. From the aqueous solutions in the absence of excess CO₂ allocated basic magnesium carbonates. Magnesium carbonate with some metals carbonates forms double salts. One of such salts isnatural mineral dolomite MgCO₃·CaCO₃.

Magnesium hydroxide (purified)

Inorganic base compound of medium strength. The chemical formula Mg(ОН)₂ Colorless crystals. At temperatures above 350° C decomposes to water and magnesium oxide. Absorbs carbon dioxide from the air and water to form a basic magnesium carbonate. Magnesium hydroxide is almost insoluble in water but soluble in ammonium salts.