Anhydrous citric acid is a colorless translucent crystal or white particles or white crystalline powder, often containing a molecule of crystal water odorless, extremely acidic taste, soluble in water, alcohol and ethanol.
The action of anhydrous citric acid
Calcium salts are more soluble in cold water than in hot water, and this property is often used to identify and isolate citric acid. Anhydrous citric acid can be obtained by controlling appropriate temperature during crystallization. The water solution is acidic. Slight weathering in dry air and delirium in moist air. Decomposition above 175℃ gives off water and carbon dioxide.
It should be used in food and beverage industry as acid taste agent, acidity regulator, flavoring agent, preservative and freshness keeping agent. It is also used as antioxidant, plasticizer and detergent in chemical industry, cosmetic industry and washing industry.
|Appearance||Colorless or white crystals or powder, odorless and tastes sour.|
|Light Transmittance (%)||≥ 95.0|
|Readily Carbonisablle Substance||≤ 1.0|
|Sulphated Ash (%)||≤ 0.05|
|Chloride (%)||≤ 0.005|
|Sulphate (%)||≤ 0.015|
|Oxalate (%)||≤ 0.01|
|Calcium (%)||≤ 0.02|
|Iron (mg/kg)||≤ 5|
|Arsenic (mg/kg)||≤ 1|
|Water Insoluble Substances||Filtration time not more than 1 min;|
Filter membrane basically doesn't change color;
Visual mottled particles not more than 3.
Citric acid is known as the first edible sour agent, China GB2760-1996 is requirements for allowing the use of food acidity regulator. In food industry widely used as sour agent, solubilizer, buffering agent, antioxidant, removing fishy smell removing sweetening agent, chelating agent, its specific purpose, numerous enumeration.
2.Used in the chemical and textile industries
Citric acid can be used as a chemical analysis reagent for chemical analysis, as an experimental reagent, a chromatographic reagent and a biochemical reagent; as a complexing agent and a masking agent; for preparing a buffer solution. The use of citric acid or citrate as a builder can improve the performance of the washing product, can quickly precipitate metal ions, prevent the re-attachment of contaminants on the fabric, maintain the necessary alkalinity for washing, and disperse and suspend the dirt and ash; Improves the performance of surfactants, is an excellent chelating agent; can be used as an acid-resistant reagent for testing architectural ceramic tiles.
Citric acid is a kind of fruit acid. Its main function is to accelerate the renewal of keratin. It is often used in lotion, cream, shampoo, whitening products, anti-aging products, acne products. The renewal of keratin helps the exfoliation of melanin in the skin, the shrinkage of pores, the dissolution of blackheads, and the like.
Effervescent is popular oral drug ingredients release system, citric acid and sodium carbonate or sodium bicarbonate solution common reaction produce large quantities of CO2 (i.e. effervescent) and sodium citrate, can quickly dissolve and enhance the ability to taste the active pharmaceutical ingredient. For example, the cathartic and painkillers increase dissolution.
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