Flomoxef Impurity 21 CAS CATO-C4X-138221
| CAS No. | CATO-C4X-138221 |
| Molecular Formula | C15H17F2N6O7S2 |
| Molecular Weight | N/A |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 518.44 g/mol gives Flomoxef Impurity 21 distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
As a process- or degradation-related impurity, Flomoxef Impurity 21 (CAS CATO-C4X-138221, C15H17F2N6O7S2Na) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Flomoxef Impurity 21 (C15H17F2N6O7S2Na) contains a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage, fluorine substitution. It is notably hygroscopic, halogen substitution raises its density and boiling point, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 | C15H17F2N6O7S2 Na |
| Molecular Weight | 518.44 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 9.5 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Halogen Content | F-containing |
| Nitrogen Atoms | 6 |
| Sulfur Atoms | 2 |
Related Flomoxef Standards
- Flomoxef Impurity 3 (CAS 103057-61-0)
- Flomoxef Impurity 2 (CAS 1208982-59-5)
- Flomoxef Impurity 5 (CAS 134237-56-2)
- Flomoxef Impurity 64 (CAS 2095482-92-9)
- Flomoxef Impurity 59 (CAS 2095489-25-9)
- Flomoxef Impurity 29 (CAS 2095697-75-7)
- Flomoxef Impurity 7 (CAS 2095697-76-8)
- Flomoxef Impurity 9 Sodium Sal (CAS 2095697-77-9 (free acid))
Recommended Standards
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- Methyl 5-bromo-2-chloro-1-methyl-6-oxo-1,6-dihydropyridine-3-carboxylate (CAS 869357-63-1)
- Prednisolone EP Impurity H (CAS 2427-64-7)
- Nojirimycin-1-Sulfonic Acid (CAS 114417-84-4)
- 3-(4-Chlorophenyl)-1,5-diphenyl-4,5-dihydro-1H-pyrazole (CAS 10180-02-6)
- Brompheniramine-d6 Maleate (CAS 1346606-73-2)
- L-Hercynine-d3 (CAS CATO-CCFD201202)
- Tirzepatide(sodium salt) (CAS 2023788-19-2(free base))
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