Appearance White crystals
Assay 98%min
Specific optical rotation +78.5˚~+81.0˚
Residue on ignition 0.5% max
Chloride 0.005% max
Sulfate 0.005% max
Heay metals 0.001% max
Lead 3ppm max
Arsenic 1ppm max
Mercury 0.1ppm max
Cadmium 1ppm max
Loss on drying 0.5% max
