Characteristic
Magnesium nitrate refers to inorganic compounds with the formula Mg(NO3)2(H2O)x, where x = 6, 2, and 0. All are white solids. The anhydrous material is hygroscopic, quickly forming the hexahydrate upon standing in air. All of the salts are very soluble in both water and ethanol.
Chemical formula:Mg(NO3)2
Molar mass:148.32 g/mol (anhydrous);184.35 g/mol (dihydrate);256.41 g/mol (hexahydr.)
Appearance:White crystalline solid
Density:2.3 g/cm3 (anhydrous);2.0256 g/cm3 (dihydrate);1.464 g/cm3 (hexahydrate)
Melting point:129 °C (264 °F; 402 K) (dihydrate);88.9 °C (hexahydrate)
Boiling point:330 °C (626 °F; 603 K) decomposes
Solubility in water:71 g/100 mL (25 ºC)
Solubility:moderately soluble in ethanol, ammonia
Refractive index (nD):1.34 (hexahydrate)
Crystal structure:cubic
Application
It is used in printing, chemical, agriculture and ceramics industries. Its fertilizer grade has 10.5% nitrogen and 9.4% magnesium.