Caustic Soda Flake , or Sodium Hydroxide, is a thin white laminate that has moisture absorbency and is capable of dissolving in water. Caustic Soda Flake is obtained from the evaporation of the liquid Caustic Soda 50% cassette which is produced by the membrane technology. Caustic soda Flake chemical and scientific name is ,Sodium Hydroxide or Naoh and it is well-known by these names