项目　                                                生物化学级
                                                           （BC）
红外光谱鉴定Infrared spectrometry       和对照品匹配
纯度Purity                                             >99.0% (滴定)
熔点Melting point                                   102°C - 106°C
水不溶物                                               ≤0.01%
重金属Heavy metals (as Pb):                 ≤0.0003 %  
pH (1 %; H2O):                                     8.8 - 9.6
等电点pKa 25℃                                     6.45-6.65  
干燥失重Water:                                      ≤1 %  
铁Fe:                                                      ≤0.0005 %  
吸光度A (1 cm/0.1 M in water):  
280 nm:                                 ≤0.04  
340 nm:                                 ≤0.02  

项目                                                  分子生物学级
                                                      （Molecular biology grade）
外观Appearance                                     白色或无色结晶
红外光谱鉴定Infrared spectrometry       和对照品匹配
纯度Purity                                             >99.0% (滴定)
熔点Melting point                                   102°C - 106°C
水不溶物                                                ≤0.01%
重金属Heavy metals (as Pb):                  ≤0.0003 %  
pH (1 %; H2O):                                      8.8 - 9.6
等电点pKa 25℃                                      6.45-6.65  
干燥失重Water:                                      ≤1 %  
铁Fe:                                                      ≤0.0005 %  
吸光度A (1 cm/0.1 M in water):  
280 nm:                                              ≤0.04  
340 nm:                                              ≤0.02  
DNA酶 DNase                                   无
蛋白酶 Protease                               无
RNA酶 RNase                                   无