苦杏仁酸（扁桃酸）

性状：无色正交片状结晶或结晶性粉末。见光变色。密封避光保存。

相对分子质量：152.15

技术条件
含量[C6H5CH(OH)SOOH],%                                          ≥99.0
外观                                                                                合格
熔点，°C                                                                        118~120                       
                              杂质最高含量（以%计）
乙醇溶解试验                                                                 合格
灼烧残渣（以硫酸盐计）                                                 0.05      
氯化物（Cl）                                                                  0.001
硫化物（S）                                                                   0.005
硫酸盐（SO4）                                                               0.005                          
铁（Fe）                                                                        0.001