Citric acid is an organic acid naturally present in many fruits and vegetables, especially citrus fruits. It is widely used in the food industry as a food additive for its sour taste and its ability to regulate the acidity of food products. Citric acid is also used in the pharmaceutical, cosmetic and cleaning industry due to its antibacterial, antioxidant properties and chelating action. It is often used as an acidifying agent, preservative, stabilizer and disinfectant in various products and formulations.