API
IMPURITY
CHEMICAL NAME
STRUCTURE
2
Cefalotin Sodium

EP Impurity C

 (6R,7R)-3-[(acetyloxy)methyl]-7-amino-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid (7-ACA), Cefalotin-Sodium_EP-Impurity-C
Cefazolin Sodium

EP Impurity E

 5-methyl-1,3,4-thiadiazol-2-thiol (MMTD) Cefazolin-Sodium_EP-Impurity-E
Cefazolin Sodium

EP Impurity H

 (6R,7R)-3-[(acetyloxy)methyl]-7-amino-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid (7-ACA) Cefazolin-Sodium_EP-Impurity-H