Industrial grade potassium carbonate is a white crystalline powder with a density of 2.428g/cm and a melting point of 891 ℃. Soluble in water and alkaline aqueous solution, insoluble in ethanol, acetone and ether. It has strong hygroscopicity. When exposed to air, it can absorb carbon dioxide and water and convert it into potassium bicarbonate. Therefore, it should be sealed and packaged.