Test Items Standard Appearance White fine crystals Assay 99.0 to 101.0% Specific Rotation [20/D] °~° Melting point 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%