Potassium Nitrate

Potassium Nitrate

What is Potassium Nitrate

Potassium nitrate is a chemical compound with the formula KNO3. It is an ionic salt of potassium ions and nitrate ions. It occurs as mineral nitre and is a natural solid source of nitrogen. It is also known as saltpetre.

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The wide applications of this chemical has led to it being called as one of “Most Useful” chemicals ever developed by the Human race.

It is slightly soluble in cold water and very soluble in hot water. It is prepared commercially by the reaction of potassium chloride with sodium nitrate. When potassium nitrate decomposes (on heating), it releases oxygen. It has been used widely as the oxygen-supplying component of gunpowder, since about the 12th century. It is a source of potassium and nitrogen, two primary nutrients that essential for plant nutrition and growth. It is used in a wide variety of applications including glass manufacturing, explosives for mining and civil works, metal treatment, and fireworks.

Researchers have discovered the potential of this product as a medicine. If taken under medical supervision in small doses, medical potassium supplements are known to lower blood pressure.

It has a variety of uses in many industries and is widely used all across the globe. Some of its main applications are in the following industries:-



It is used in numerous industrial applications like:-

  • Fireworks.
  • Glass.
  • Explosive.
  • Nitrogenous Fertilizers for Foliar applications (NPK 13:00:45 formulation)
  • Meat Preservatives (E252)
  • Cigarette paper.
  • Toothpaste for Sensitive Teeth.
  • Thermal Storage Salts.
  • Ceramic Frits.
  • Tree stump removal.
  • Heat treatment of metals.

Details of SNDB Chemicals Potassium Nitrate can be found below:-


Physical Properties

Chemical FormulaKNO3
AppearanceWhite crystals
Melting Point334 °C
Density2.11 g/cm3
Molar Mass101.10 g/mole

Technical Specifications

ParametersUnitGrade IGrade IIPharma
Assay (as KNO3)% min99.509999.70
Nitrogen (as NO3)% max131313
Potassium (as K2O)% max46.5046.5046.50
Nitrites (as NO2)% max0.010.010.01
Loss on drying% max0.150.150.15
pH of 5% soln6.56.56.5
Chlorides% max0.0010.150.0001
Water insoluble matter% max0.0010.0010.0001


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