Citric acid is a weak organic acid found naturally in citrus fruits such as lemons, oranges, and limes. It has many uses in various industries, including food, beverage, pharmaceutical, and cosmetic.
In food and beverage, citric acid is used as a preservative, flavoring agent, and acidulant. It can enhance the flavor of various foods and drinks, such as sodas, candies, and frozen desserts, and also help prevent the growth of bacteria and fungi.
In the pharmaceutical industry, citric acid is used as an excipient in many medications, including effervescent tablets, as it can improve the solubility of active ingredients.
In cosmetic products, citric acid is used as a pH adjuster, and can also help exfoliate and brighten the skin.