Citric is a colorless weak organic acid. It occurs naturally in citrus fruits. In biochemistry, it is an intermediate in the citric acid cycle, which occurs in the metabolism of all aerobic organisms.
People use it as a food flavoring and preservative, an ingredient in cosmetics, and a component in cleaning products.
Citric acid is also used in insecticides and disinfectants to help destroy bacteria and viruses. It is used to preserve and marinate meats, and flavor foods and beverages.