Appearance White or almost white crystalline powder Specific optical rotation -69.0°～-79.0° Light transmittance ≥98% PH 2.5-3.2 Water ≤0.1% Assay ≥99.0%

Appearance Off-white powder Assay ≥98% Melting point 60-63℃ Water ≤0.1% Residue on igition ≤0.3%

Appearance Pale yellow liquid Assay ≥98%

Appearance Yellow solid Loss on drying 1.0% max Melting Point 40℃-44℃ Max single impurity 1.5% max Purity 98.0% min