Citric acid derivatives are compounds that are chemically related to citric acid, a natural organic acid found in citrus fruits. These derivatives can be formed through various chemical reactions, such as esterification or oxidation, and often retain some of the properties of citric acid, including its acidity and ability to act as a chelating agent. These derivatives are widely used in food, pharmaceuticals, and cosmetics. For example, citric acid esters are commonly used as emulsifiers and stabilizers in food products, while citric acid salts can serve as flavor enhancers or preservatives. Their versatility makes them valuable in many industries.