Solid caustic soda is a white solid scaly mass, very hygroscopic. Liquid caustic soda has the form of a colorless liquid.
Caustic soda (sodium hydroxide) is the most common alkali, a widely used product of the chemical industry. It is used in the oil industry for the purification of petroleum products, in the light industry during the production of silk, and also in the technological processes of fabric bleaching. It is used in the pulp and paper industry to produce cellulose. Caustic soda is successfully used in metallurgy in the production of aluminum. In the automotive industry, it is used in the production of alkaline batteries, in the chemical industry in the manufacturing processes of trilon B, and, of course, it is of great importance in the production of a wide variety of detergents: from ordinary soap to washing powders of various types. In the food industry, with the help of caustic soda, the refining of vegetable oils is carried out
oils and some other products.