Flomoxef Impurity 20 CAS CATO-C4X-138220
| CAS No. | CATO-C4X-138220 |
| Molecular Formula | C15H17F2N6O7S2 |
| Molecular Weight | N/A |
| 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.
As a process- or degradation-related impurity, Flomoxef Impurity 20 (CAS CATO-C4X-138220, C15H17F2N6O7S2Na) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Owing to a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage, fluorine substitution, Flomoxef Impurity 20 is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 518.44 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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).
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.
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
- Mesna EP Impurity D sodium salt (CAS 16208-51-8)
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- Palbociclib Impurity 16 (CAS CATO-C4X-112516)
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- EN 6 (CAS 1808714-73-9)
- D-Trp25-Tirzepatide (CAS CATO-CPTD788909)
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