Chemical preservatives refer to substances that inhibit the growth and reproduction of microorganisms in food by chemical means, and extend the shelf life of food. Chemical preservatives are widely used in food processing and storage to ensure the safety and quality stability of food. The following are the applications of chemical preservatives in food:

Sulfate preservatives
: such as sodium sulfite, sodium bisulfite, etc., are commonly used for the preservation of dried fruits, vegetables, fruits, fruit juices, and other foods.
Acid preservatives:
such as citric acid, malic acid, acetic acid, etc., commonly used for the preservation of beverages, jams, pickled foods, etc.
Beet Red Pigment: A natural red pigment with antioxidant and antibacterial effects, commonly used in the preservation of meat products, beverages, candy, and other foods.
Synthetic preservatives:
such as sodium propionate, sorbitol diester, etc., commonly used in the preservation of baked goods such as bread, cakes, biscuits, and so on. It should be noted that chemical preservatives also have a certain impact on human health, and excessive or long-term consumption may cause damage to the body. Therefore, when using chemical preservatives in food, the amount used should be controlled to ensure the safety and health of the food.