Caustic Soda Flakes are an inorganic substance, which have the formula NaOH. these are known as lye and caustic soda. The product is an ionic white solid chemical made up of the sodium cations Na+ and the hydroxide anions OH. Sodium hydroxide are the very corrosive base and alkali that can result in serious chemical burns and degrades proteins at normal room temperature. Because of their high water solubility, these quickly takes in moisture and carbon dioxide from the atmosphere. Caustic Soda Flakes produces many hydrates of NaOH and H2O.