Magnesium Nitrate in Chemical Industry - WorldOfChemicals

Magnesium Nitrate - Properties and Uses

Magnesium Nitrate


Magnesium nitrate is an inorganic hygroscopic salt, which is composed of magnesium, nitrogen and oxygen with the chemical formula Mg(NO3)2. It naturally occurs in caverns and mines as nitro magnesite. This is not a common form, although it could be present in places where guano comes in contact with magnesium rich rock.



Magnesium nitrate is prepared by dissolving magnesium oxide, carbonate or hydroxide in nitric acid. It is then followed by evaporation and crystallization at normal room temperature. In commerce, magnesium nitrate used is prepared by the reaction of various magnesium salts along with nitic acid.

Impurities such as iron, aluminum and calcium are precipitated by pretreatment of the solution with little excess of magnesium oxide, followed by subsequent filtration.



Magnesium nitrate is primarily used as a dehydrating agent or a desiccant, in the preparation of nitric acid. Apart from this, magnesium nitrate is commonly used as a catalyst in the manufacture of fireworks and petrochemicals. It is also used as viscosity adjusters, intermediates and construction materials.

This inorganic chemical compound finds applications in the agriculture, printing, chemical and ceramics industries. Fertilizers containing magnesium nitrate are normally used in the hydroponics and greenhouse trade.



Exposure to magnesium nitrate can lead to the irritation of the mucous membrane. Symptoms could include shortness of breath and coughing. Ingestion of excess amount can cause vomiting, dizziness, abdominal pain, diarrhea and convulsions. Contact with skin could cause redness, pain and irritation.


When heated to decomposition, nitrogen oxide fumes are liberated. Since, magnesium nitrate is a strong oxidizing agent, its contact with oxidizable matter could lead to violent combustion.



While dealing with magnesium nitrate at chemical laboratories, clean body covering clothing and protective gloves must be worn. Contact lenses should be avoided when working with this inorganic chemical compound. Contact lenses must not be worn when dealing with this chemical compound.

As an immediate precaution, isolate leak or spill area for a minimum radius of 25 meters for solids and 50 meters for liquids. In the event of dust exposure, the approved respirator must be used.


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