Potassium is present in Earth’s crust. But potassium sulphate (K₂SO₄) is rarely found in nature and is also known as arcanite. (K₂SO₄) can be formed in the laboratory by reacting KCl with Sulphuric acid. By using the Hargreaves process, Sulphur dioxide, oxygen, water, and potassium chloride potassium sulphate.

Potassium is an essential mineral for plant nutrition. On the other hand, potassium sulphate is a brilliant source of potassium for plants. And the potassium component in potassium sulphate is the same as potash fertilizer. Potassium sulphate is also a source of that sulphate is used by plants for enzyme and protein synthesis. Potassium sulphate also helps plants in regulating water in leaves and branches. Studies show that the low concentration of K in soil results in less plant growth. Other uses of potassium sulphate include; the production of gypsum board and gypsum cement, the synthesis of potassium alum; as a flash reducer, glass making, and ceramics