The structural formula of citric acid is HOC(CH2COOH)2COOH. The molecular weight is 192.13, and the structure contains three functional groups: one hydroxyl group (—OH) and two carboxyl groups (—COOH). Citric acid (CA), also known as citric acid, with the molecular formula C?H?O?, is an important organic acid. It is a colorless crystal, odorless, has a strong sour taste, and is easily soluble in water. It is a natural Preservatives and food additives. The melting point of citric acid is 153°C (water loss); the boiling point is 175°C; the decomposition density is 1.542g/cm?.

Precautions when using citric acid:

Citric acid is an edible acid that can enhance normal metabolism in the body and is harmless to the human body in appropriate doses. Adding citric acid to certain foods tastes good and can increase appetite. In China, citric acid is allowed to be used in jams, drinks, cans and candies. Based on the effect that citric acid can have on calcium metabolism.

People who often consume canned food, drinks, jams, and sour candies, especially children, should pay attention to calcium supplements, drink more milk, fish heads, fish bone soup, eat small shrimps, etc., to avoid insufficient blood calcium. And it affects health. Patients with gastric ulcer, hyperacidity, dental caries and diabetes should not consume citric acid regularly. Citric acid cannot be added to pure milk, otherwise it will cause the pure milk to coagulate. The dairy industry often mixes citric acid into a solution of about 10% and adds it to a low-concentration milk solution. It should be stirred quickly when adding.

Reference for the above content: Baidu Encyclopedia-Citric Acid