Sodium hydroxide is widely used in the manufacturing of paper and pulp. It helps in breaking down wood chips to extract cellulose fibers, which are essential for paper production. In the chemical industry, it serves as a key ingredient in the production of various chemicals, including detergents, soaps, and synthetic fibers. It is also used in the saponification process to convert fats and oils into soap. In water treatment facilities, sodium hydroxide is employed to neutralize acidic water and remove heavy metals by precipitating them as hydroxides. This ensures safer and cleaner water for consumption and industrial use. The food industry utilizes it for cleaning and processing equipment, as well as in food preparation. For example, it is used to peel fruits and vegetables, and in the production of cocoa and chocolate. In the petroleum industry, sodium hydroxide is used to refine petroleum products and remove impurities. It also plays a role in the production of biodiesel by catalyzing the transesterification of fats and oils. Additionally, it is used in the textile industry for fabric processing, including dyeing and bleaching, to improve the quality and appearance of textiles.