Levofloxacin Impurity 51 CAS 1026952-91-9
| CAS No. | 1026952-91-9 |
| Molecular Formula | C13H11F2NO4 |
| Molecular Weight | 283.23 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including Levofloxacin Impurity 51.
As a process- or degradation-related impurity, Levofloxacin Impurity 51 (CAS 1026952-91-9, C13H11F2NO4) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Based on its molecular formula C13H11F2NO4, Levofloxacin Impurity 51 contains a nitrogen-containing heterocyclic scaffold, 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 283.23 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).
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.
As a certified reference material (CRM), Levofloxacin Impurity 51 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 | C13H11F2NO4 |
| Molecular Weight | 283.23 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| 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) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1988 |
| Halogen Content | F-containing |
| Nitrogen Atoms | 1 |
Related Levofloxacin Standards
- Levofloxacin Impurity 12 (CAS 1798887-79-2)
- Levofloxacin EP Impurity F (CAS 100986-89-8)
- Levofloxacin Impurity 16 (CAS 82419-35-0)
- Levofloxacin Impurity 20 (CAS 2206360-62-3)
- Levofloxacin impurity 72 (CAS CATO-C4X-137172)
- Levofloxacin impurity 91 (CAS 151250-74-7)
- Levofloxacin Impurity 18 (CAS 431058-46-7)
- Levofloxacin impurity 90 (CAS CATO-C4X-137190)
Recommended Standards
- Celecoxib Impurity 16 (CAS 915280-81-8)
- 7-(Benzo[d][1,3]dioxol-5-yl)pyrazolo[1,5-a]pyrimidine-3-carboxylic acid (CAS 1017068-75-5)
- Methyl 4-oxo-4-((5-(trifluoromethyl)-1,3,4-thiadiazol-2-yl)amino)butanoate (CAS 329695-18-3)
- 1-(2-Methoxyethyl)-2,4,7-trioxo-1,2,3,4,5,6,7,8-octahydropyrido[2,3-d]pyrimidine-5-carboxylic acid (CAS 1030477-46-3)
- Brimonidine EP Impurity A (CAS 91147-43-2)
- Difelikefalin Impurity 80 (CAS CATO-C4X-304180)
- Apixaban Impurity 85 (CAS 14273-86-0)
- 2',5'-Dichloro-[1,1'-biphenyl]-2,5-dione (CAS 79756-69-7)
- 3-aminopyrazolo[1,5-a]pyrimidin-7-ol (CAS 201599-18-0)
- (S)-5-benzyl-3-bromo-6-methyl-4,5,6,7-tetrahydropyrazolo[1,5-a]pyrazine (CAS 2306252-53-7)
- 3-Ethoxy-2-methyl-6-nitropyridine (CAS 73101-78-7)
- Moxifloxacin-D3 Hydrochloride (CAS 1092356-42-7)
- 3-((4-(1H-1,2,4-triazol-1-yl)phenyl)amino)-1-(4-methoxyphenyl)propan-1-one (CAS 763126-06-3)
- Tirzepatide Impurity 44 (CAS CATO-C4X-324044)
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