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                                           Items
                                          Standard
                     
                                      Appearance
                                          White   to off-white powder
                     
                                      Identification
                                          HNMR
                     
                                      Molecular weight
                                          406.9±1.0
                     
                                      HPLC peak area purity
                                          ≥98.0%
                     
                                      Related substances
                                          Maximum single impurity <1.0%
                     
                                      Moisture
                                          <5%
                     
                                      Assay
                                          ≥98.0%
                     
                                      Infrared
                                          Conforms to standard
                     
                                      Heavy Metals
                                          ＜20ppm
                     
                                      Residue on Ignition
                                          ＜1.0%
                     
    

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