Test Items Standard Appearance White fine crystals Assay 98.0 to 101.0% Specific Rotation [20/D] -21.00° (c=2.5, water) Melting point 48-50℃ Chloride (Cl) Not more than 0.10% Heavy Metals (Pb) Not more than 10 PPM Loss on Drying Not more than 0.20% Residue on Ignition (Sulfate) Not more than 0.20%