K2SO4 - Potassium sulfate

What is Potassium sulfate?

K2SO4 is an inorganic chemical compound. It is also known as Sulfuric acid dipotassium salt or dipotassium sulfate. Potassium sulfate occurs naturally in volcanic lava and salt lakes. It appears as a colourless to white crystalline powder or crystals. It is odourless and has a bitter, hard and saline-like taste. It dissolves in water but insoluble in ethanol. Production of potassium sulfate –

The steps followed to obtain this compound are as follows:

  1. Crushing the mineral langbeinite
  2. Washing it
  3. Extracting the mineral
  4. Separating

The product is then treated with an aqueous solution of potassium chloride to separate the 2 parts of the double salt from each other.

Potassium sulfate compound can also be produced synthetically. This is possible by treating potassium chloride with raw sulfuric acid.

Properties of Potassium sulfate – K2SO4

K2SO4 Potassium sulfate
Molecular Weight/ Molar Mass 174.259 g/mol
Density 2.66 g/cm³
Boiling Point 1,689 °C
Melting Point 1,069 °C

Potassium sulfate structure – K2SO4

Structure of Potassium sulfate

K2SO4 Uses (Potassium sulfate)

  • It is dominantly used as a fertilizer for crops which include tobacco, some vegetables, and fruits.
  • Potassium sulfate is used as a salt substitute.
  • It is used in artillery propellant charges as a flash reducer.
  • It is used in soda blasting.
  • Potassium sulfate is used as a supplement for animal feeds.
  • It is used in the production of lubricants and dyes.
  • It is used in the manufacturing of ceramics and glass.
  • It is used in the production of gypsum board.
  • It is used to synthesize potassium aluminium sulfate.
  • It is used to produce gypsum cement.
  • It is used in explosives as a flash suppressant

Learn more about the chemical behaviour and importance of K2SO4 with the expert faculties at BYJU’S.

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