To ensure the color of the solution according to CP in its expired time, we purified 7-ADCA, the majority material to produce Cefradine.

• 为确保头抱拉定的色级在效期内符合药典标准,将主要原料7-ADCA进行精制,利用平行试验的方法,对比头孢拉定的色级及色级稳定性。