头孢噻呋钠分子式：C19H16N5NaO7S3分子量：545.53质量标准出口标准ANALYSISTEST检验项目SPECIFICATIONS规格RESULTS结果Description性状Off-whiteoryellowpowder类白色或微黄色粉末Lightyellowpowder微黄色粉末Identification鉴别HPLC:SameRtthanreferencestandardHPLC:与对照品保留时间一致Conforms符合规定Bacterialendotoxins细菌内毒素≤0.2EU/mgConforms符合规定PH酸度5.0-7.57.0Water水分≤4.0%1.8%Impurity总杂质Totalimpurities≤3.0%Individualimpurity(Cefotaxime)≤1.0%2.1%0.5%Content含量CountBasedonAnhydrousSubstance,>85%按无水物计，应≥85%87.5%Assay(HPLC)纯度≥97%面积归一法计算（areanormalizationmethod）99.1%)