Potassium hydroxide Formula: KOH Appearance and properties: White crystals Solubility: Insoluble in water, soluble in hot out alcohol and glycerol. Melting point 360.4 degrees Celsius. The chemical properties similar sodium hydroxide solution), (caustic soda is colorless, have a strong alkali can damage cells and tissues. Main application: Be used as the raw material, chemical production and used in medicine, dye, light Industry, etc.