Levofloxacin impurity 71 CAS CATO-C4X-137171
| CAS No. | CATO-C4X-137171 |
| Molecular Formula | C13H10FNO4 |
| Molecular Weight | 263.22 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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 process- or degradation-related impurity, Levofloxacin impurity 71 (CAS CATO-C4X-137171, C13H10FNO4) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Owing to a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, fluorine substitution, Levofloxacin impurity 71 is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 263.22 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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 | C13H10FNO4 |
| Molecular Weight | 263.22 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| 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) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Halogen Content | F-containing |
| Nitrogen Atoms | 1 |
Related Levofloxacin Standards
- Levofloxacin Impurity 43 (CAS 117620-84-5)
- Levofloxacin impurity 91 (CAS 151250-74-7)
- Levofloxacin Impurity 20 (CAS 2206360-62-3)
- Levofloxacin impurity 72 (CAS CATO-C4X-137172)
- Levofloxacin Impurity 101 (CAS 105804-40-8)
- Levofloxacin Impurity 102 (CAS 1260774-13-7)
- Levofloxacin EP Impurity F (CAS 100986-89-8)
- Levofloxacin Impurity 16 (CAS 82419-35-0)
Recommended Standards
- Enrofloxacin Impurity 12 (CAS 130579-27-0)
- 1310AF 5-Ethyl-7-trifluoromethyl-4,5,6,7-tetrahydro-pyrazolo[1,5-a]pyrimidine-3-carboxylic acid 876708-67-7 C10H12F3N3O2 (CAS 876708-67-7)
- Nemonoxacin Impurity 27 (CAS 926279-65-4)
- N4-(3-fluorophenyl)-5-methylisoxazole-3,4-dicarboxamide (CAS 338792-90-8)
- Relebactam Impurity 50 (CAS CATO-C4X-214450)
- Saxagliptin impurity 78 (CAS CATO-C4X-104978)
- Nebivolol Impurity 2 (CAS CATO-C4X-19682)
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- [6-(Pent-4-ynyloxy)pyridin-3-yl]methylamine (CAS 1993316-69-0)
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- 4-Phenyldibenzofuran (CAS 74104-10-2)
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- 4-Fluoro-N-(2-fluorophenyl)benzamide (CAS 101398-08-7)
- C-Peptide (Proinsulin) (CAS 59112-80-0)
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