Magnesium nitrate - Mg(NO3)2

What is Magnesium nitrate?

Mg(NO3)2 is an inorganic nitrate salt of magnesium with a chemical name Magnesium nitrate. It is also called Magnesium dinitrate or Magniosan or Nitromagnesite (hexahydrate). It is widely used in pyrotechnics.

Magnesium dinitrate is a hygroscopic, crystalline solid white in colour. It is highly soluble in water as well as ethanol and occurs naturally in caverns and mines.

Properties of Magnesium nitrate – Mg(NO3)2

Mg(NO3)2 Magnesium nitrate
Molecular weight of Mg(NO3)2 148.32 g/mol (anhydrous)
Density of Magnesium nitrate 2.3 g/cm3 (anhydrous)
Melting point of Magnesium nitrate 129 °C
Boiling point of Magnesium nitrate 330 °C

Magnesium nitrate structure – Mg(NO3)2

Magnesium nitrate structure

Mg(NO3)2 Uses (Magnesium nitrate)

  • Magnesium nitrate is used as a dehydrating agent to prepare concentrated nitric acid.
  • Used in the manufacturing of petrochemicals.
  • Used as a desensitizer for lithographic plates.
  • Used to manufacture ammonium nitrate.
  • Used in the purification of nitric acid.
  • Used in industries as a viscosity adjuster.
  • Used in the manufacturing of agricultural products.
  • Used in the making of toner, and colorant products.
  • Used in the process is mining.

Magnesium nitrate Reactions

Magnesium dinitrate reacts with alkali metal hydroxide to produce the following:

Mg(NO3)2 + 2 NaOH → Mg(OH)2 + 2 NaNO3

Magnesium nitrate has a high affinity towards water. Therefore, heating it results to decompose into magnesium oxide, nitrogen oxides, and oxygen.

2 Mg(NO3)2 → 2 MgO + 4 NO2 + O2.

Health hazards

Exposure to Magniosan causes mild irritation in the mucous membranes. Symptoms include shortness of breath and coughing. Swallowing large doses may result in dizziness, vomiting, weakness, collapse. abdominal pain, bloody diarrhea, and convulsions. When comes in contact with skin causes redness, pain, and irritation.

On heating this compound to decompose it emits toxic fumes of nitrogen oxides. Contact with oxidizable compound may result in extremely violent combustion.

Learn more about the Structure, physical and chemical properties of Mg(NO3)2 from the experts at BYJU’S.

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