_{Cephapirin benzathine
Name:5-Thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid, 3-[(acetyloxy)methyl]-8-oxo-7-[[(4-pyridinylthio)acetyl]amino]-, (6R,7R)-, compd. with N,N'-bis(phenylmethyl)-1,2-ethanediamine; 1,2-Ethanediamine, N,N'-bis(phenylmethyl)-, bis[(6R,7R)-3-[(acetyloxy)methyl]-8-oxo-7-[[(4-pyridinylthio)acetyl]amino]-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate]
CAS NO:97468-37-6
Molecular formular:C17H17N3O6S2 . 1/2C16H20N2
Molecular weight:543.63}

_{Quality standard: USP36}

_purity:97%

_{Cephapirin contains：71.5~82.0%}