Reference Standard
| CAS Number | Not assigned |
| Formula | Approx. C₁₆H₁₅N₇O₇S₂ (structure-dependent) |
| Molecular Weight | ~485–505 g/mol |
| Purity | ≥95% |
| Storage | –20 °C; protect from light and moisture. |
Nitrosamine impurity derived from cefixime; classified as a potential genotoxic impurity per regulatory guidance.
EP impurity reference, nitrosamine risk assessment, LC-MS method development.
LC-MS/MS, HRMS, HPLC purity, NMR (structure confirmation).
