Moxifloxacin Impurity 40(S,R) CAS 855661-74-4
| CAS No. | 855661-74-4 |
| Molecular Formula | C21H24FN3O4 |
| Molecular Weight | 401.43 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
As a process- or degradation-related impurity, Moxifloxacin Impurity 40(S,R) (CAS 855661-74-4, C21H24FN3O4) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Based on its molecular formula C21H24FN3O4, Moxifloxacin Impurity 40(S,R) contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage, fluorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 401.43 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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 | C21H24FN3O4 |
| Molecular Weight | 401.43 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| 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) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1987 |
| Halogen Content | F-containing |
| Nitrogen Atoms | 3 |
Related Moxifloxacin Standards
- MOXIFLOXACIN (CAS 1346747-14-5)
- Moxifloxacin (CAS 354812-41-2)
- Moxifloxacin Impurity 41(R,S) (CAS 855661-71-1)
- Moxifloxacin EP Impurity D (CAS 1029364-77-9)
- Moxifloxacin EP Impurity G (CAS 268545-13-7)
- Moxifloxacin (CAS 151096-09-2)
- Moxifloxacin impurity 79 (CAS 2445515-66-0)
- Moxifloxacin Impurity 83 (CAS 1829588-19-3)
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- GO 6976 (CAS 136194-77-9)
- 5,6,7,8-Tetrahydro-4H-cyclohepta[b]thiophen-4-one (CAS 61942-70-9)
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