Sodium hydroxide (NaOH), also known as lye and caustic soda,is an inorganic compound. It is a white solid and highly caustic metallic base and alkali salt which is available in pellets, flakes, granules, and as prepared solutions at a number of different concentrations.Sodium hydroxide is soluble in water, ethanol and methanol.
Application are as:
Sodium hydroxide is a popular strong base used in the industry. Around 56% of sodium hydroxide produced is used by the industry, 25% of which is used in paper industry. Sodium hydroxide is also used in manufacturing of sodium salts and detergents, pH regulation, and organic synthesis. It is used in the Bayer process of aluminium production.in bulk, it is most often handled as an aqueous solution, since solutions are cheaper and easier to handle.