Caustic soda flakes, also known as sodium hydroxide flakes or NaOH flakes, are a strong, highly alkaline chemical compounds used in a variety of industrial and household applications. They are often used in the production of paper, textiles, and detergents, as well as in the treatment of wastewater and the refining of petroleum. Caustic soda flakes are highly soluble in water and can be used to create solutions of varying strengths, depending on the desired application.