Magnesium in the metal form is used in:
• An alloying element in aluminium, zinc, lead and other non-ferrous alloys.
• Cathodic protection of other metals against corrosion.
• Flashlight photography, photoengraving plates, flares and pyrotechnics (which includes incendiary bombs).
• Airplane alloys and missiles construction.
• As a reduction agent for the production of pure uranium from its salt.
• Building construction as a flashing material.
• Its alloys are implemented in lightweight applications, auto parts, aerospace equipment, power tools, sporting goods, fixtures and materials-handling equipment.
Magnesium and its compounds are used in:
• Magnesium nitrate [(Mg(NO3)2.6H2O], is used in dry colours, pyrotechnics and to produce magnesia.
• Magnesium methoxide [Mg(OCH3)2], used to dry alcohols to produce absolute fuels.
• Magnesium fluoride (MgF), or sellaite, having a very low refractive index is used for lens and instrument windows to eliminate reflection.
• Its hydroxide, chloride, sulphate and citrate are used in medicines.
• Magnesium carbonate (MgCO3), is used also in insulating coverings for steam pipes and furnaces, making of oxychloride cement, in boiler compounds, and as a filler for rubbers and paper.
• Magnesium sulphate (MgSO4.7H2O) is used also in leather tanning, as a mordant in dyeing and printing textiles, as filler for cotton cloth, for sizing paper, in water-resistant and fireproof magnesia cements and as a laxative.