熔点：245.0 °C 
[α]20D -20.0 ° (C=4.00, H2O)  
 

外观Appearance                                  白色结晶粉末
溶液澄清度与色泽Clarity：                  无色、澄清
红外光谱鉴别Infrared spectrometry       符合 
纯度Purity (HPLC)                                ≥99.0% (面积归一法) 
含量Assay (UV )：                               98.0% (以干品计)
熔点Melting point                                  245℃～250℃ 
比值 (abs. max. 249nm,ε=8,ε=         150±2%, PH7)：
A250/A260                                              1.30～1.40
A280/A260                                               0.08～0.10
比旋光度Specific rotation [a]20/D       +50 ～ +54 °(C=1, W/V in NaOH)
干燥失重Loss on drying                        ≤0.5%
灼烧残渣Residue On Ignition               ≤0.1%
重金属Heavy Metals(as pb)：              ≤10ppm

WGK Germany  3