Citric acid is widely used as a preservative and flavor enhancer in food and beverages. It acts as an acidity regulator and pH stabilizer in processed foods and soft drinks. It is used in pharmaceutical formulations and effervescent tablets. Citric acid is applied in cosmetic and personal care products for pH adjustment. It is used in cleaning agents and detergents for removing limescale and stains. It serves as a chelating agent in industrial and water treatment applications.