D. Magnesia (MgO)

↪ It occurs naturally as solid mineral periclase. 
↪ It is generally obtained by heating magnesite (MgCO₃) ore.
↪ Molecular formula: MgO
↪ Chemical name: Magnesium oxide
↪ Common name: Magnesia

⁕ Uses of Magnesia

↪ It is used as refractory material in lining furnace.
↪ It is used for making crucible.
↪ It is used as antacid.
↪ Its aqueous suspension is called milk of magnesia.

E. Epsom salt (MgSO₄.10H₂O)

↪ It occurs as epsomite.
↪ It is colorless crystalline efflorescent substance having bitter taste.
↪ Molecular formula: MgSO4.10H2O
↪ Chemical name: Hepta-hydrated Magnesium Sulphate
↪ Common name: Epsom salt

⁕ Uses of Epsom

↪ It is used in medicine as a purgative drug, and as antidote for barium and barbiturate poisoning.
↪ It is used as a source of magnesium fertilizers.
↪ It is used in the dyeing and sizing of textiles.
↪ It is used in the manufacture if paints, soaps.