Appearance White crystalline powder
Assay 99.0-100.5%min
Melting point 128-132℃
Specific optical rotation -15.7˚~-17.3˚
Residue on ignition 0.1% max
Loss on drying 0.5%max
metals 20ppm max
Absence of reducing substance Accords with the specification
Clarity and color of the solution Accords with the specification