Moxifloxacin impurity 165 CAS 457948-35-5
| CAS No. | 457948-35-5 |
| Molecular Formula | C11H9NO3 |
| Molecular Weight | 203.19 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 165 (CAS 457948-35-5, C11H9NO3) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Based on its molecular formula C11H9NO3, Moxifloxacin impurity 165 contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 203.19 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
As a certified reference material (CRM), Moxifloxacin impurity 165 meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C11H9NO3 |
| Molecular Weight | 203.19 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Nitrogen Atoms | 1 |
Related Moxifloxacin Standards
- Moxifloxacin impurity 163 (CAS 148887-46-1)
- Moxifloxacin impurity 164 (CAS 1668584-26-6)
- Moxifloxacin Impurity 66 (CAS 38233-47-5)
- Moxifloxacin Impurity 45 (CAS 112811-65-1)
- Moxifloxacin Impurity N45 (CAS 1042641-60-0)
- Moxifloxacin Impurity N44 (CAS 116751-24-7)
- Moxifloxacin Impurity 176 (CAS 2102950-42-3)
- Moxifloxacin Impurity 35 (CAS 151213-39-7)
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