Citric acid is an important organic acid, also known as citric acid, colorless crystals, often containing a molecule of crystalline water, odorless, with a strong acidic smell, easily soluble in water. Its calcium salt is more soluble in cold water than in hot water, and this property is often used to identify and separate citric acid. Citric acid can be obtained anhydrous by controlling the appropriate temperature during crystallization. It has many applications in industry, food industry, cosmetics industry, etc.

For food industry

Because of its mild and refreshing acidity, citric acid is commonly used in the manufacture of various beverages, soft drinks, wines, candies, snacks, cookies, canned juices, dairy products and other foods. In the market of all organic acids, citric acid market share is more than 70%, flavoring agent, also used as an antioxidant for edible oil. It also improves the organoleptic properties of food, enhances appetite and promotes the digestion and absorption of calcium and phosphorus substances in the body. Citric acid anhydrous is used in large quantities in solid drinks. Salts of citric acid such as calcium citrate and iron citrate are fortifying agents for calcium and iron ions in some foods. Esters of citric acid such as triethyl citrate can be used as non-toxic plasticizers to manufacture plastic films for food packaging, acidulant and preservative for beverage and food industries.

Used in chemical and textile industries

Citric acid can be used in chemical technology as reagent for chemical analysis, laboratory reagent, chromatographic reagent and biochemical reagent; used as complexing agent, masking agent; used to prepare buffer solution. The use of citric acid or citric acid salts as auxiliary detergent, can improve the performance of washing products, can quickly precipitate metal ions, prevent pollutants from reattaching to the fabric, to maintain the necessary alkalinity of washing; so that dirt and ash dispersion and suspension.

Formaldehyde pollution of garments has been a very sensitive issue, citric acid and modified citric acid can be made into a formaldehyde-free anti-wrinkle finishing agent for cotton fabric anti-wrinkle finishing. Not only good anti-wrinkle effect, and

and low cost.

For environmental protection

Citric acid-sodium citrate buffer is used for flue gas desulfurization. China is rich in coal resources, which is the main part of energy, but there has been a lack of effective flue gas desulfurization process, resulting in serious atmospheric SO2 pollution. The research of effective desulfurization process is a matter of urgency. Citric acid-sodium citrate buffer solution is a valuable desulfurization absorber due to its low vapor pressure, non-toxicity, chemical stability and high absorption rate of SO2.

For livestock production

Adding citric acid to piglet feed can wean early, improve feed utilization rate by 5% to 10%, and increase the litter size of sows. Adding 1%-2% citric acid in the diet of growing fattening pigs can improve daily weight gain, reduce meat ratio, improve protein digestibility, reduce back fat thickness and improve meat quality and carcass characteristics. Citric acid rare earth is a new type of efficient feed additive, suitable for various animals such as pigs, chickens, fish, shrimps, cattle, sheep, rabbits, silkworms, etc. It has the characteristics of promoting animal growth, improving product quality, increasing disease resistance and survival rate, improving feed conversion rate, shortening feeding cycle, etc.

Used in cosmetics

Citric acid is a kind of fruit acid, the main role is to accelerate the renewal of keratin, commonly used in lotions, creams, shampoos, whitening products, anti-aging products, acne products, etc.. The renewal of keratin helps the skin's melanin peeling, pore refinement, blackhead dissolution, etc.

For sterilization

Citric acid and 80 ℃ temperature combination has a good effect of killing bacterial spores, and can effectively kill the bacterial spores contaminated in the hemodialysis machine line. King of Western food

Lemon has a strong bactericidal effect and is good for food hygiene, plus the fresh smell of lemon, people traditionally like to use it to make cold dishes, which is not only delicious and refreshing, but also can enhance appetite.

Used in medicine

1. Citric acid has the effect of preventing and eliminating skin pigmentation. Chinese traditional medicine believes that lemon is warm, bitter, non-toxic, has the function of quenching thirst and generating fluid, dispelling summer heat and calming the fetus, draining stagnation, strengthening the stomach, relieving pain, etc. Diuretic, regulating vascular permeability, suitable for swollen and fat mm. smokers should eat more lemon because they need two times more vitamin C than non-smokers. Lemon is low in calories and has strong contractility, so it facilitates fat reduction and is a good remedy for weight loss. Lemon prevents cardiovascular atherosclerosis and reduces blood viscosity. Hot lemon juice with honey is very effective in the treatment of bronchitis and nasopharyngitis. Glycyrrhiza glabra moistens the lungs, sour ground quenches thirst, appetizing and detoxifies alcohol, whitens the skin, emollient and lowers cholesterol. Brew the remaining, can be applied to the face to treat facial spots, pimples.

2, expel phlegm: more little known, is lemon can also expel phlegm, and expel phlegm efficacy than orange and citrus also strong. The lemon juice with warm water and salt can be drunk to cough out the phlegm accumulated in the throat smoothly, which is very effective. At the beginning of the flu, you may use lemon and honey to drink water, which can relieve sore throat and reduce dry throat discomfort.

3, maintenance of the body every morning before any food to drink a glass of lemon water, can strengthen the intestinal peristalsis, treatment of constipation, the elimination of toxins in the body, to achieve the effect of beauty, but also to remove bad taste in the mouth, eliminate bad breath. A glass of hot lemon water every morning can also make your eyes look brighter and your skin rosier. If you add more lemon juice to the water, it will also play a role in removing waste from the body.