Appearance (Colour)
White or almost white , colourless
Appearance (Form)
Crystalline powder or crystals
Solubility
Freely soluble in water,slightly soluble in alcohol
Identification (IR Spectrum)
A) Passes
Assay (HPLC)
98.5 -101.5% (On anhydrous bassis)
Residue on ignition
NMT 0.1%
Water (KF)
NMT 0.5%
Reference
USP 44
