Citric acid, also known as citrate, is a colorless crystal. It often contains one molecule of crystal water, is odorless, has a strong sour taste, and is easily soluble in water. Its calcium salt is easier to dissolve 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 the appropriate temperature during crystallization. The following is a specific analysis of the use of citric acid:
Because citric acid has a mild and refreshing sour taste, it is commonly used in the manufacture of various beverages, sodas, wines, candies, snacks, biscuits, canned juices, dairy products and other foods. In all organic acid markets, the acidifier citric acid made by citric acid manufacturing plant has a market share of more than 70%. Up to now, there is no acidifier that can replace the citric acid. Citric acid with one molecule of crystal water is mainly used as an acid flavoring agent for refreshing beverages, fruit juices, jams, fruit candies and canned foods, and can also be used as an antioxidant for edible oils. At the same time, it improves the sensory properties of food, enhances appetite and promotes the digestion and absorption of calcium and phosphorus in the body.
(1) Citric acid can be used as the reagent for chemical analysis in chemical technology, used as experimental reagent, chromatographic analysis reagent and biochemical reagent, used as complexing agent, masking agent and used to prepare buffer solution.
(2) Citric acid or citrate used as builders can improve the performance of washing products, can quickly precipitate metal ions, prevent pollutants from re-attaching to the fabric, maintain the necessary alkalinity for washing, and disperse and suspend dirt and ash. It can improve the performance of surfactants, is an excellent chelating agent and can be used as a reagent for testing the acid resistance of architectural ceramic tiles.
Adding citric acid to the piglet feed can wean the piglets early, increase the feed utilization rate by 5% to 10%, and increase the litter size of the sow. Adding 1% to 2% citric acid to the daily ration for growing and fattening pigs can increase daily gain, reduce feed-to-meat ratio, increase protein digestibility, reduce back fat thickness, and improve meat quality and carcass characteristics. Rare earth citrate is a new type of high-efficiency feed additive, suitable for pigs, chickens, fish, shrimps, cattle, sheep, rabbits, silkworms and other animals. It can promote animal growth, improve product quality, increase disease resistance and survival rate, improve the feed conversion rate and shorten the feeding cycle. At this time we have to admit that the use of citric acid is very wide.
Citric acid is a kind of fruit acid. Its main function is to accelerate the renewal of keratin. It is often used in lotions, creams, shampoos, whitening products, anti-aging products, and acne products. The renewal of keratin helps to peel off the melanin in the skin, shrink the pores, and dissolve blackheads.
The combined effect of citric acid and 80°C temperature has a good effect of killing bacterial spores, and can effectively kill the contaminated bacterial spores in the pipelines of hemodialysis machine. Lemon, known as the "King of Western Food", has a strong bactericidal effect and is good for food hygiene. Coupled with the fragrance of lemon, people have always liked to use it to make cold dishes. It is not only delicious and refreshing, but also can increase appetite.