Caustic soda flakes, chemically known as sodium hydroxide (NaOH), are white, odorless, and highly corrosive solids. Widely used in industries like textiles, paper, soap, detergents, and water treatment, they dissolve easily in water to form a strong alkaline solution. Caustic soda flakes are essential in pH regulation, cleaning, and chemical manufacturing, but require careful handling due to their reactivity.