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Citric acid monohydrate, also known as citric acid, citric acid, exists in nature in lemons, citrus, plums, plums, pears, peaches, figs and other fruits, with more immature acid content.
Citric acid monohydrate is colorless translucent crystal or white crystalline powder, easily soluble in water or alcohol solution, and can also be mixed with other ingredients to form an emulsion. Odorless, with a strong pleasant sour taste, it gradually weathers in warm air and deliquescent in moist air. According to different crystallization conditions, the crystal forms include anhydrous citric acid and citric acid containing crystal water.
Commercial citric acid is mainly anhydrous citric acid and citric acid monohydrate.
Citric acid monohydrate is crystallized from an aqueous solution at a low temperature (below 36.6°C), and the product is separated and dried. Placed in dry air, the crystal water in citric acid monohydrate will escape and weather.
Anhydrous citric acid is crystallized in an aqueous solution above 36.6 °C, and the critical temperature for the conversion of citric acid monohydrate to anhydrous citric acid is 36.6 °C.
Citric acid is a weak organic acid with a sour preference. Citric acid is commonly utilized in the food as well as beverage market as an acidity regulator and chemical.
Citric acid monohydrate is mainly used in the food and beverage industries. As sour representative, seasoning representative as well as preservative, chemical. It can additionally be utilized as feed additive, non-toxic detergent, mordant, and so on. It is additionally used as antioxidant, plasticizer, detergent in chemical sector, cosmetic industry and cleaning sector. It is also made use of in the preparation of pharmaceutical cooling down agents, ingredients for detergents, etc.
Applications in the food industry:
Citric acid monohydrate is secure and non-toxic, as well as is referred to as the very first edible sour agent. It is widely used in beverage as well as fruit handling, soy items and flavor agents.
Citric acid monohydrate is extensively utilized in jelly, sweet, a glass of wine, as well as citric acid is added to frozen food, which can reinforce the result of anti-oxidants, inactivate enzymes, and ensure the security of frozen food. Including citric acid to veggies and also fish and shellfish can inhibit the development of microorganisms and lengthen the preservation time.
This product can make soft drinks acidic because it reacts with carbon dioxide gas to form carbonic acid, which then dissolves added calcium carbonate to neutralize the gas.
Sodium citrate and potassium citrate are added to jelly, cakes and various beverages as acidulants, food additives, etc. to improve the flavor. According to statistics, about 70% of the total production of citric acid is used in the food and beverage industry.
The pharmaceutical industry is used to prepare ferric ammonium citrate (as blood supplement) and sodium citrate (as blood transfusion agent). And can be used as an antidote for alkaline poisoning.
Citric acid monohydrate is also widely used in various nutritional oral liquids to adjust the pH value of oral liquids, maintain the stability of ingredients, and ensure nutritional effects.
Uses in the chemical industry:
Citric acid monohydrate also has a wide range of applications in the chemical industry. Citric acid itself is a chemical synthesis intermediate and the basic raw material for chemical synthesis. Because of its excellent buildings, it is widely utilized as cleaner, stabilizer, chelating representative as well as defoamer in the chemical sector.
In shampoos, anti-dandruff shampoos and hair dyes, adding citric acid to adjust the pH value can increase hair luster and restore hair elasticity when shampooing. Citric acid is added to cosmetics and toothpaste to prevent the product from breaking down and spoiling.
Recently, with the enhancement of people’s recognition of environmental management, sodium citrate is an increasing number of widely made use of to generate ecologically friendly and eco-friendly phosphorus-free cleaning agents.
Citric acid monohydrate is used in electroplating industry as pH adjuster of electroplating solution. The printing and dyeing industry is used as a resist for varamine dyes. In addition, it can also be used as metal cleaner, grease antioxidant, concrete retarder, boiler cleaning agent, non-toxic plasticizer, pipe cleaning agent, etc.
As a chemical reagent, it is used as a sequestering agent, used to prepare buffer solutions, determine serum potassium, and determine bismuth, nitrite, oxygen and water.
In addition, citric acid monohydrate can also be used in light industry, atomic energy, environmental protection and other industrial fields, and is an indispensable raw material for cosmetics, metal cleaning agents, resins, cardboard, tobacco, electroplating, etc.
There is no significant distinction between citric acid monohydrate as well as citric acid anhydrous, yet the former includes a crystal water, which is no various from ordinary water after being dissolved.
Mutual transformation: Heating citric acid monohydrate to 153°C (dehydration), the critical temperature of solution crystallization is 36.6°C (the crystal above 36.6°C is citric acid anhydrous, and the crystal below 36.6°C is citric acid monohydrate).
Normally speaking, the added materials include a lot of water, as well as the enhancement proportion is normally very little, so the enhancement of these 2 type of citric acid rarely impacts the water material, so they can be made use of.
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