The chemical formula for potassium hydroxide is K(OH). This compound is formed by one atom of potassium and one molecule of hydroxide, which is formed by one atom each of oxygen and hydrogen.
Potassium hydroxide is commonly referred to as caustic potash and appears as white or yellow crystals that can form lumps, flakes and pellets. Potassium hydroxide is an odorless substance with a melting point of 715 degrees Fahrenheit and a boiling point of 2,415 degrees. As the compound decomposes with heat, it emits toxic potassium oxide gas. It is a strong base that reacts violently to acids and readily corrodes metals.