POTASH is not the correct name for kaun; the right name is Trona.

Kaun, Akaun or Kanwa is not Potash. Potash comes from the word Pot Ash. It refers to salts that contain potassium in water-soluble form like potassium chloride, potassium bi carbonate.

Kaun, Akaun, or Kanwa is TRONA.

Trona is Sodium Sesquicarbonate dihydrate. It is a geological mineral found in the thick bed deposits of Lake Chad and Yobe Troughs. It is mined in commercial quantity in Bauchi, Yobe, and Borno States in Nigeria. It can coexist with other minerals such as Natron, Thermonatrite, Halite, and Gypsum.
It is the second most commonly-used salt in Nigeria. In the United States, it is the primary source of Sodium carbonate (Soda Ash). Soda as is used as water softener and can be used to remove oil and grease stains. Soda Ash is also used in textiles, paper, chemicals and glass production.