Appearance: white to off-white crystal powder
      Melting Point:  ≥76℃
      Specific Rotation :  -56±2
      Assay:  ≥98％
      Residue on ignition:  ≤0.5%
      Heavy metals( ppm ) :  ≤10

Storage & transportation:

      Store at a dry, light-free place, below 0 ℃