Citric Acid Monohydrate is used as an excipient in pharmaceutical preparations due to its antioxidant properties. It maintains stability of active ingredients and is used as a preservative. It is also used as an acidulant to control pH and acts as an anticoagulant by chelating calcium in blood. In the food industry, Citric acid is predominantly used as a flavouring and preserving agent, especially in soft drinks and candies.