Cefotaxime Impurity 16 CAS CATO-C4X-120116
| CAS No. | CATO-C4X-120116 |
| Molecular Formula | C16H19N5O8S2 |
| Molecular Weight | 473.48 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Based on its molecular formula C16H19N5O8S2, Cefotaxime Impurity 16 contains a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 473.48 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
Cefotaxime Impurity 16 (CAS CATO-C4X-120116) is a certified pharmaceutical impurity reference standard with the molecular formula C16H19N5O8S2 and a molecular weight of 473.48 g/mol.
This reference standard supports related-substances testing and method development in line with ICH Q3A/Q3B guidance on impurity control, and is suitable for system suitability testing and forced-degradation studies.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C16H19N5O8S2 |
| Molecular Weight | 473.48 g/mol |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 5 |
| Sulfur Atoms | 2 |
Related Cefotaxime Standards
- Cefotaxime Impurity 5 (CAS 64485-89-8)
- E-Cefotaxime S-Oxide (CAS 69132-42-9)
- Cefotaxime S-Oxide (CAS 97466-27-8)
- (E)-Cefotaxime S-Oxide (CAS CATO-C4X-120131)
- Cefotaxime S-Oxide (CAS CATO-C4X-120158)
- Cefotaxime S-Oxide 2 (CAS 71048-88-9)
- Cefotaxime Impurity 90 (CAS CATO-C4X-120190)
- Cefotaxime EP Impurity D Sodium Salt (CAS 65715-12-0)
Recommended Standards
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