Citric Acid Monohydrate USP/Ph.Eur 25KG Go Back


: 5949-29-1

Molecular Formula

: C6H8O7.H2O

Molecular Weight

: 210.14
Description: Colourless, translucent crystals or white or almost white granular to fine crystalline powder, efflorescent.(Note: The product may cause lumps or hardening over the storage).
Solubility: Very soluble in water, freely soluble in alcohol and ethanol(96%), very slightly soluble in ether,
Identification (By chemical test 1): The solution is strongly acidic.
Identification (By IR): IR spectra of the sample should be concomitant with IR spectra of the corresponding standadrd
Identification (By chemical test 2): A red colour develops.
Identification (By chemical test 3): A white precipitate is formed.
Identification (By Water): 7.5% to 9.0%
Appearance of solution: The solution is clear and colourless or not more intensely coloured than reference solution Y7, BY7 or GY7.
Clarity of solution: The sample solution shows the same clarity as that of water or its opalescence is not more pronounced that standard suspension A.
Colour of solution: The sample solution is not more intensely colored than water or standard solutions A, B, and C .
Assay (Anhydrous basis): 99.5% - 100.5%
Residue on ignition /Sulfated ash: NMT 0.1%
Sulphate(SO4): NMT 0.015% (NMT 150 ppm)
Limit of oxalic acid: NMT 0.036% (NMT 360 ppm)
Readily carbonizable substances: The color of the acid should not be darker than that of a similar volume of matching reference solution A (fluid K) or reference solution B.
Water: 7.5% to 9.0%
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