结晶磺胺(SN)
中华人民共和国兽药规范
（1992）                                              BPC68                                EP6                   
性状：白色结晶性颗粒                                                                   白色或淡黄白色结晶性粉末                          
熔点：164.5-166.5℃                        164.5-166.5℃                  164.5-166.0℃   
鉴别：(1)(2)(3)应符合                      (1)(2)(3)(4)(5)应符合          ABCD应符合            
粒度：二号筛上不得过0.5%
            五号筛上不得过15%                   /                                  /
酸度：≤0.1mol/L NaOH 0.2ml            /                          ≤0.1mol/L NaOH 0.2ml                                         
重金属：不得过百万分之十                  /                          ≤20PPM  
含量：不得少于99.0%             ≥99.0%                         99.0-101.0%  
干燥失重：/                               ≤0.5%                            ≤0.5%  
铁盐：/                                       ≤40PPM                         /
氯化物：/                                  ≤350PPM                         /                                                    
有关物质：/                               ≤0.5%（TLC）            ≤0.5%（TLC）                  
炽灼残渣：/                               ≤0.1%                            ≤0.1%