Potassium hydroxide is an inorganic compound with the chemical formula KOH. Also commonly called caustic potash, it is a strong base. It is used in various chemical, industrial and manufacturing applications. Potassium hydroxide is also a precursor to other potassium compounds and a direct food substance affirmed as generally recognized as safe. In food products, potassium hydroxide acts as a pH control agent, stabilizer and thickener.