Cefpodoxime Proxetil Impurity 9 CAS CATO-C4X-15799
| CAS No. | CATO-C4X-15799 |
| Molecular Formula | C21H27N5O10S2 |
| Molecular Weight | 573.60 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
Cefpodoxime Proxetil Impurity 9 (CAS CATO-C4X-15799) is a certified pharmaceutical impurity reference standard with the molecular formula C21H27N5O10S2 and a molecular weight of 573.60 g/mol.
Cefpodoxime Proxetil Impurity 9 (C21H27N5O10S2) contains a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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).
Recommended for quantitative analysis by HPLC, GC, LC-MS/MS, or GC-MS as an external calibration standard; it can also be used for spiked-recovery experiments, LOD/LOQ determination, and LC-MS/MS multiple-reaction-monitoring (MRM) calibration.
Physical & Chemical Properties
| Molecular Formula | C21H27N5O10S2 |
| Molecular Weight | 573.60 g/mol |
| Purity | >90% |
| 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) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 5 |
| Sulfur Atoms | 2 |
Related Cefpodoxime Standards
- Cefpodoxime Proxetil Impurity 10 (CAS CATO-C4X-157910)
- Cefpodoxime Impurity 48 (CAS CATO-C4X-157948)
- Cefpodoxime Impurity 50 (CAS CATO-C4X-157950)
- Cefpodoxime Impurity 62 (CAS CATO-C4X-157962)
- Cefpodoxime Proxetil EP Impurity E (CAS 217803-89-9)
- Cefpodoxime Proxetil EP Impurity E (CAS CATO-C4X-157951)
- Cefpodoxime Proxetil EP Impurity F (CAS CATO-C4X-157953)
- Cefpodoxime Proxetil EP Impurity F (CAS 96680-30-7)
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