About Magnesium Granules Mg Granules: Magnesium Granules silvery-white metal (hexagonal system).The melting temperature of 648.5 ℃.The boiling point of 1107 ℃.Relative density 1_74.Soluble in inorganic acids, ammonium salts, insoluble in cold water, chromic anhydride, alkali. It decomposes in hot water to form magnesium hydroxide. In dry air does not lose luster, but in moist air,…