Appearance White or slightly yellowish crystalline powder, slightly hygroscopic.
Solubility Sparingly soluble in water and in acetone,freely soluble in Methanol, Ethanol(96%),practically insoluble in 1mol/1 sodium hydroxide
Identification A: IR-Spectrum
B: TLC Chromatogram
Appearance of solution Clear
Absorption at 440nm max 0.05
PH of 1% m/V solution in ethanol(10%V/V) 6.4-8.4
Clarity(5% w/V solution in methanol) Clear
Colour(5% w/V solution in methanol) The absorbance measured at 440nm is not greater than 0.05
Sulphated substances 0.1% max
Related substances Single impurity: 0.2% max
Total impurity: 0.5% max
Heavy metals 10ppm max
Loss on drying 0.5% max
Assay 99%-101%