Caustic soda flakes (technical sodium hydroxide flakes) – flake mass of white color, very hygroscopic, very soluble in water and alcohol. The formula is NaOH. Technical sodium hydroxide flakes are obtained by evaporating of liquid caustic soda. The product is used in organic synthesis processes, petroleum products refining, the textile industry in production of viscose silk and in bleaching fabrics in paper and aniline industry, soap making, production of aluminum and sodium metal, soluble glass, alkaline accumulators, Trilon B.