... , in producing explosives, catalysts and other magnesium salts. Magnesium NitrateSynonyms: Magnesium Nitrate 6-Hydrate; Magnesium (II) nitrate, hexahydrate; Nitric acid,magnesium salt, hexahydrate CAS No.: 13446-18 ... (As Pb): 0.002% MAX..PH: 4.0 MIN. Crystal Magnesium Nitrate 100% water soluble