Caustic soda liquid (sodium hydroxide solution, NaOH) is widely used for:
1. Chemical Manufacturing – For making soaps, detergents, bleach, and other chemicals.
2. Petroleum Industry – For refining oil and removing impurities.
3. Pulp & Paper – For processing wood pulp and recycling paper.
4. Cleaning – As an industrial degreaser and drain cleaner.
5. Water Treatment – For pH adjustment and neutralizing acidic water.
6. Food Processing – For peeling fruits/vegetables, curing olives, and pretzel making.
7. Textiles – For cleaning and preparing fabrics for dyeing.
8. Laboratories – For pH control and chemical reactions.
Note: It is highly corrosive and must be handled with care.