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Appearance White or almost crystalline powder
** rotation[α]20/D (C=8 in 6N HCl) +25.0°to+27.0°
Chloride (Cl) Not more than 0.05%
Sulfate(SO4) Not more than 0.03%
Heavy metal(Pb) Not more than 20ppm
Ammonium(NH4) Not more than 0.02%
Losson drying Notmore than 3.0%
Residue on ignition(sulfated) Notmore than 0.1%
Assay 98.5% to 101.0%
PH 5.5 to 7.0