Cas No. :5949-29-1
Properties:
At room temperature, citric acid is a white crystalline powder. It can exist either in an anhydrous (water-free) form or as a monohydrate. The anhydrous form crystallizes from hot water, whereas the monohydrate forms when citric acid is crystallized from cold water. The monohydrate can be converted to the anhydrous form by heating it above 74 c. Citric acid also dissolves in absolute (anhydrous) ethanol (76 parts of citric acid per 100 parts of ethanol) at 15 degrees celsius. In chemical structure, citric acid shares the properties of other carboxylic acids. When heated above 175 c, it decomposes through the loss of carbon dioxide and water.
1.Citric Acid Monohydrate
Specification:
Characters: A white, crystalline powder, colorless crystals or granules
Identification: To pass test
Appearance of solution: To pass test
Readily carbonisale substances: To pass test
Oxalic acid: Max. 350 ppm
Aluminium: Max. 0.2 ppm
Sulphates: Max. 150 ppm
Heavy metals: Max. 10 ppm
Water: 7.5%~9.0%
Sulphated ash: Max. 0.1%
Bacterial endotoxins: To pass test
Assay: 99.0%~100.5%
2.Citric Acid Anhydrous
Specification:
Definition complies with the test
Characters white, crystalline powder, colorless crystals or granules
Identification complies with the test
Assay 99.5%~100.5%
Loss on drying ≤ 0.5%
Readily carbonisable substances: Pass the test
Sulfate ash ≤ 0.1%
Iron ≤ 50ppm
Chloride ≤ 50ppm
Oxalate ≤ 300ppm
Sulphate ≤ 150ppm
Heavy metals ≤ 10ppm
Arsenic ≤ 4ppm
Calcium ≤ 200ppm
Barium pass the test
Tridodecylamine ≤ 0.1ppm
Packing: 25kg/kraft bag or as required.
Xi:Irritant;