It is produced by the strain of Cephalosporium aceemonium C.M.I 49137. Cephalosporin C has weak resistance to gram-positive and negative bacteria, is stable to penicillinase, and can be broken down by cephalosporin enzyme. Hydrolysis and removal of side chains to obtain 7-amino-cefenoic acid (7-ACA) is an important raw material for the preparation of semi-synthetic cephalosporin.