外观Appearance White to tan crystals or powder 红外光谱鉴别Infrared spectrometry Conforms to structure 纯度Purity(HPLC) ≥98.0 % 纯度Purity(Nonaqueous Titration) 97.5 - 102.5 % 熔点Melting point 171.0 - 175.0 °C 比旋光度Specific rotation [a]20/D +180.0 to +200.0 °(C=1,CH2Cl2)