Displaying 4 results of Cefazolin Stable Isotopes Cefazolin stable isotopes are a set of isotopes that have the same number of protons and electrons in their nucleus as the naturally occurring element but differ in their number of neutrons. These isotopes are used in the stable isotope labeling of cefazolin, which is a cephalosporin antibiotic used to treat bacterial infections. The labeled cefazolin is used in research studies to understand its pharmacokinetics, metabolism, and to identify its targets. The stable isotope-labeled cefazolin is also used in drug development and quality control processes.