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Magnesium Nitrate

Magnesium nitrate represented by the chemical formula Mg(NO3)2 or MgN2O6 that bears the IUPAC name magnesium dinitrate [1] is a white crystalline hygroscopic powder that is soluble in water and alcohol [6]. It is a magnesium salt and contains chemical bonds that are ionic in nature [1].

Magnesium Nitrate

Magnesium Nitrate Identification

CAS Number 10377-60-3 [1]
PubChem CID 25212 [1]
ChemSpider ID 23415 [2]
EC Number 233-826-7 [1]

Composition and Synthesis

Magnesium nitrate can be prepared by combining magnesium sulfate with calcium nitrate [4].

MgSO4 + Ca(NO3)2 = Mg(NO3)2 + CaSO4

Magnesium Nitrate Formula

Properties and Characteristics of Magnesium Nitrate

General Properties

Molar mass/molecular weight 148.313 g/mol [1]

Physical Properties

Color/appearance White crystals [1]
Melting point/freezing point 89°C, 192.2°F [3]
Boiling point 330°C, 626°F [3]
Density 1.46 g cm-3 [3]
State of matter at room temperature (normal phase) Solid [1]

Chemical Properties

Solubility in water 42 g/100 ml (at 20oC) [4]
pH 5-7 (acidic) [5]

Atomic Properties

Crystal structure Cubic [6]

Magnesium Nitrate Structure

Prominent Reactions of Mg(NO3)2

A chemical reaction between magnesium nitrate and sodium carbonate produces magnesium carbonate and sodium nitrate [7].

Mg(NO3)2 + Na2CO3 = MgCO3 + 2NaNO3

Magnesium nitrate decomposes in water forming magnesium hydroxide, ammonia and oxygen [8].

Mg(NO3)2 + 4H2O = Mg(OH)2 + 2NH3 + 4O2

On heating Mg(NO3)2, it decomposes in magnesium oxide, nitrogen dioxide and oxygen [9].

2Mg(NO3)2 = 2MgO + 4NO2 + O2

It reacts with sodium hydroxide to give magnesium hydroxide and sodium nitrate [10].

Mg(NO3)2 + 2NaOH = Mg(OH)2 + 2NaNO3

Magnesium Nitrate Uses

  1. As a safe source of nitrate ions [4].
  2. In the production of nitrogenous fertilizers [4].
  3. In pyrotechnics and concentrated nitric acid manufacture [6].
  4. Helps in prilling and coating for ammonium nitrate production and is an ingredient of cosmetics and shampoos [6].

Is It Dangerous

Being a strong oxidizer, it may cause a fire hazard. It may also cause an explosion hazard when brought in contact with organic substances. Contact with eyes, skin and inhalation should be avoided as it results in irritation, coughing and shortness of breath. Ingestion in large quantities results in abdominal pain, dizziness, bloody diarrhea, vomiting, convulsions, weakness and collapse [6].


  1. Magnesium Nitrate –
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  5. Magnesium Nitrate Hexahydrate –
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  7. Question: Magnesium Nitrate and sodium carbonate Mg(NO_3)_2 + Na_2 –
  8. How is the balanced equation of magnesium nitrate plus water determined? –
  9. The thermal decomposition of nitrate magnesium –
  10. Question: Sodium hydroxide reacts with magnesium nitrate to form magnesium hydroxide –

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