Citric acid is an important organic acid, also known as citric acid, colorless crystal, often contains a molecule of crystal water, odorless, strong acid, easily soluble in water. Its calcium salts are readily soluble in cold water than in hot water. This property is often used to identify and separate citric acid. Anhydrous citric acid can be obtained by controlling suitable temperature during crystallization. There are many uses in industry, food industry, makeup industry and so on.
