Sodium Citrate USP/Ph.Eur 25KG Go Back


: 6132-04-3

Molecular Formula

: C6H5Na3O7.2H2O

Molecular Weight

: 294.11
Appearance/Description: Colorless crystals or white, crystalline powder/ granular crystals, slightly deliquescent in moist air.
Solubility: Freely soluble in water & very soluble in boiling water. Insoluble in alcohol & Practically insoluble in ethanol (96%)
Identification (Citrate): Solution should produce violet colour turning to violet blue
Identification (Citrate ): A light red color should produce
Identification(Sodium): A dense white precipitate should form.
Identification (reaction upon ignition): Upon ignition, it should yield an alkaline residue that effervesces when treated with 3N hydrochloric acid
Appearance of Solution: Clear and colourless solution
Acidity or alkalinity: Not more than 0.2ml of 0.1M sodium hydroxide is required to change the colour of the indicator.
Alkalinity: No pink colour is produced by 1 drop of phenolphthalein.
Readily carbonizable substances: The solution is not more intensely coloured than reference solution Y2 or GY2.
Chlorides: 50ppm max
Oxalate: 300ppm max
Sulphate (SO4): 150ppm max
Water (By KF): 11.0%-13.0%
Water (At 180°C for 18h): 10.0% -13.0%
Assay (Anhydrous basis): 99.0%-101.0%
Assay (on Anhydrous basis): 99.0%- 100.5%
Tartrates: No crystalline precipitate is formed.
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