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Citric Acid Monohydrate - China

IUPAC Name	: 2-Hydroxy-1,2,3-propane tricarboxylic acid monohydrate
Cas Number	: 5949-29-1
HS Code	: 2918.14.00
Formula	: C₆H₈O₇.H₂O

Basic Info

Appearance Name	: White Crystalline Powder
Common Names	: Citric Acid Monohydrate
Packaging	: 25 Kg Bag

Industry

Textile Chemicals

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Technical Document

About Citric Acid Monohydrate - China

Citrus fruits naturally contain citric acid, a weak organic acid with the formula C₆H₈O₇. It is a component of the citric acid cycle, which all aerobic organisms need for metabolism. Over 70% of the yearly output of citric acid, which is generated in excess of a million tons worldwide, is utilized by the food and beverage sector as an acidifier or antioxidant to improve or preserve the tastes and scents of fruit juice, ice cream, and marmalades. There are two forms of citric acid: monohydrate, which crystallizes in cold water, and anhydrous, which crystallizes in hot water. Heating citric acid monohydrate will provide the anhydrous form of the acid.

Manufacturing Process

Citric acid is produced by submerged fermentation using fungus from different sources of carbohydrates, such as molasses and starch-based media. As precipitation, calcium oxide is added to form the slightly soluble tri-calcium citrate tetrahydrate. The precipitate is removed by filtration and washed to remove impurities. It is treated with sulphuric acid to form calcium sulfate and filtered off. The citric acid liquid is then treated with active carbon and passed through a cation and anion exchanger. Finally, the liquid is concentrated in vacuum crystallizers at 20 - 25℃, forming citric acid monohydrate.