Citric acid 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 using citric acid.
1. The acidifier citric acid is used in the food industry
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 has a market share of more than 70%. Up to now, there is no sour agent that can replace citric acid. One molecule of crystalline water, citric acid, 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.
2. Citric acid is used in the chemical, pharmaceutical and textile industries
In chemical technology, citric acid can be used as a reagent for chemical analysis, as an experimental reagent, chromatographic analysis reagent and biochemical reagent; as a complexing agent and masking agent; and as a buffer solution. Using citric acid or citrates as builders can improve the performance of washing products, can quickly precipitate metal ions, prevent contaminants from re-attaching to the fabric, and maintain the necessary alkalinity for washing; disperse and suspend dirt and ash. It is an excellent chelating agent to improve the performance of surfactants; it can be used as a reagent for testing the acid resistance of architectural ceramic tiles.
3. Citric acid is used in livestock production
Adding citric acid to piglet feed can wean early, increase feed utilization rate by 5% to 10%, and increase sow litter size. Adding 1% to 2% citric acid in the diet of growing and finishing 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.
4. Citric acid is used in cosmetics
Citric acid is a kind of fruit acid. Its main function is to accelerate the renewal of keratin. Citric acid manufacturing plant produces the citric acid product, which is often used in lotions, creams, shampoos, whitening products, anti-aging products, acne products, etc. The renewal of keratin helps to peel off the melanin in the skin, shrink the pores, and dissolve blackheads.
5. Citric acid is used for sterilization
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 hemodialysis machine pipeline. Lemon 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.
6. Citric acid is used in medicine
Traditional Chinese medicine believes that lemon is warm in nature, bitter in taste, non-toxic, and has the functions of producing body fluids, quenching thirst, dispelling heat and restoring fetus, stabilizing stagnation, invigorating the stomach, and relieving pain. It can adjust vascular permeability and be suitable for people with swelling and obesity. Besides, citric acid can prevent cardiovascular arteriosclerosis and reduce blood viscosity.