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  • Citric Acid

Citric Acid


Citric Acid Monohydrate Property:

Colourless crystals or white crystalline granules (technical grade with light yellow colour), odorless, taste intensely tart flavour, readily soluble in water and ethanol.

Molecular Formula: C6H8O7.H2O

Molecular Weight: 210.14

CAS No.: 5949-29-1

Citric Acid Anhydrous Property:

colorless or white crystalline powder. deliquescent in humid air and efflorescent in dry air.

Molecular Formula: C6H8O7

Molecular Weight: 192.1

CAS No.: 77-92-9

NameCitric Acid AnhydrousCitric Acid Monohydrate
AppearanceColourless or White crystalline powderColourless or White crystalline powder
Chemical formulaC6H8O7C6H8O7·H20
CAS No.77-92-95949-29-1
EINECS No.201-069-1201-069-1
Molecular weight192.1210.14
Model numberBP98/E330/USP24/FCCBP93/BP98/E330/USP24/FCC
PackingIn 25KG composite paper-plastic bagsIn 25KG composite paper-plastic bags
NameCitric Acid AnhydrousCitric Acid Monohydrate
Assay, %99.5-100.5-
Purity, %-99.5-101.5
Sulphate, ppm150 Max150 Max
Oxalate, ppm100 Max100 Max
Calcium, ppm200 Max-
Heavy metals, ppm5 Max5 Max
Iron, ppm50 Max-
Chloride, ppm50 Max-
Sulphated ash, ppm0.1 Max0.05 Max
Bacterial endotoxin, IU/mg0.5 Max0.5 Max
Aluminium, ppm0.2 Max0.2 Max
Lead, ppm1 Max0.5 Max
Moisture, %0.5 Max7.5-8.8
Mercury, ppm1max1max


1. For the food industry
Because citric acid has a mild and sour acidity, it is commonly used in the manufacture of various beverages, sodas, wines, candies, snacks, biscuits, canned juices, dairy products and the like. In the market of all organic acids, citric acid market share of more than 70%, flavoring agents, can also be used as antioxidants in edible oils. At the same time improve the sensory traits of food, enhance appetite and promote the digestion and absorption of calcium and phosphorus substances in the body. Anhydrous citric acid is used in large quantities in solid beverages Salts of citric acid such as calcium citrate and ferric citrate are fortifiers that require the addition of calcium and iron ions in certain foods.
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.
3. For environmental protection
Citric acid-sodium citrate buffer is used for flue gas desulfurization.
4. For cosmetics
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.