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Name of index | BP2010 | E -332(ii) | usp-30 | |
Description | White, hygroscopic, granular powder or transparent crystals | |||
Identification | Pass test | Pass test | Pass test | |
Assay( anhydrous basis) | % | 99.0 -101.0 | ≥99.0 | 99.0-100.5 |
Solubility | Very soluble in water, practically insoluble in ethanol(96 per cent) | -- | -- | |
Appearance of solution | Solution is clear and colorless | -- | -- | |
Acidity and Alkalinity | Pass test | -- | Pass test | |
Chloride | ≤ppm | 50 | -- | -- |
Heavy metals(as Pb) | ≤ppm | 10 | -- | 10 |
Oxalates | ≤% | 0.03 | 0.01 | -- |
Sulphates | ≤% | 0.015 | -- | -- |
Tartrate | -- | -- | Pass test | |
Pyrogens | Pass test | -- | -- | |
Readily carbonisable substances | Pass test | -- | -- | |
Loss on drying, | 11.0-13.0 | 10.0-13.0(180 °C, 18h) | 10.0-13.0(180 °C, 18h) | |
pH(5% aqueous solution) | -- | 7.5-9.0 | -- | |
Arsenic(As) | ≤ppm | -- | 1 | -- |
Lead(Pb) | ≤ppm | -- | 2 | -- |
Mercury(Hg) | ≤ppm | -- | 1 |