it is a kind of inorganic compounds, the chemical formula is KOH, is a common inorganic material, has a strong alkaline, soluble in water, ethanol, slightly soluble in ether, easily absorb moisture in the air and deliquescence. It can absorb carbon dioxide and become potassium carbonate, mainly used as the material of producing potassium, can also be used for electroplating, printing and dyeing, etc.