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1,Formula: C6H5K3O7·H2O
2,Formula wt: 324.41
3,CAS: [6100-05-6]
4,Specificity: White crystal or powder; odorless; taste salty; easy deliquescence; readily soluble in water or glycerin, almost insoluble in ethanol(Relative density 1.98 it will melt and decompose when heated to 230°C.
5,Packing: 25kg net paper bag or 1mt big bag with PE liner.
Name of index | BP98 | E-332(ii) |
Description | White, hygroscopic, granular powder or transparent crystals | |
Identification | Positive tests for citrate and for potassium | |
Appearance of solution | Clear and colourless | -- |
Assay(on anhydrous basis),% | 99.0—101.0 | ≥99.0 |
Chloride ,≤ppm | 50 | -- |
Heavy metals(As Pb),≤ppm | 10 | 5 |
Sodium,≤% | 0.3 | -- |
Oxalates,≤% | 0.03 | 0.01 |
Sulphates,≤% | 0.015 | -- |
Acidity or Alkalinity | Passes test | -- |
Easiest carbonated substances | Not deeper than standard | -- |
Loss on drying(180°C,4h) | 4.0-7.0 | ≤6% |
pH(5% aqueous solution) | 7.5-9.0 | |
Arsenic(As),≤ppm | -- | 1 |
Lead(Pb),≤ppm | -- | 1 |
Mercury(Hg),≤ppm | -- | 1 |
potassium citrate