Levofloxacin Impurity 53 CAS CATO-C4X-137153
| CAS No. | CATO-C4X-137153 |
| Molecular Formula | C18H20FN3O6 |
| Molecular Weight | 393.37 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.
CATO supplies Levofloxacin Impurity 53 (CAS CATO-C4X-137153), a pharmacopoeial impurity reference standard (molecular formula C18H20FN3O6, MW 393.37 g/mol) used for the identification and quantification of trace impurities in APIs.
Based on its molecular formula C18H20FN3O6, Levofloxacin Impurity 53 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 393.37 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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 | C18H20FN3O6 |
| Molecular Weight | 393.37 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 |
| 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) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Halogen Content | F-containing |
| Nitrogen Atoms | 3 |
Related Levofloxacin Standards
- Levofloxacin Impurity 63 (CAS CATO-C4X-137163)
- Levofloxacin Impurity 86 (CAS CATO-C4X-137186)
- Levofloxacin Impurity 55 (CAS CATO-C4X-137155)
- Levofloxacin Desethylene Diformyl Impurity (CAS 151377-74-1)
- Levofloxacin Hemihydrate EP Impurity H (CAS 177472-30-9)
- Levofloxacin Impurity 38 (CAS 2130840-92-3)
- Levofloxacin Impurity 84 (CAS CATO-C4X-137184)
- Levofloxacin impurity 68 (CAS CATO-C4X-137168)
Recommended Standards
- tert-Butyl [Bis(4-methoxyphenyl)phosphinyloxy]carbamate (CAS 619333-95-8)
- Osimertinib Impurity 40 (CAS CATO-C4X-204540)
- 6-[1-(4-Fluorophenyl)-1H-pyrazol-5-yl]-2-(3-methoxyphenyl)-4-methyl-2,3,4,5-tetrahydro-1,2,4-triazine-3,5-dione (CAS 321538-37-8)
- Osimertinib Impurity 90 (CAS CATO-C4X-204590)
- N-nitroso-fluoxetine (CAS 150494-06-7)
- Ceritinib Impurity 79 (CAS CATO-C4X-104879)
- Bumetanide Impurity 69 (CAS CATO-C4X-198669)
- 2-(4-((1H-Benzo[d]imidazol-2-yl)methyl)piperazin-1-yl)-N-((tetrahydrofuran-2-yl)methyl)acetamide (CAS 1171202-96-2)
- 6-(Indolin-1-yl)-3-(p-tolyl)pyrimidine-2,4(1H,3H)-dione (CAS 847399-57-9)
- 7-amino-8-bromo-tetralin-1-one (CAS 214697-98-0)
- Tert-butyl 7-((R)-1-amino-2-methoxy-2-oxoethyl)-4-azaspiro[2.5]Octane-4-carboxylate (CAS 2387585-41-1)
- 4-Methoxybenzyl isobutyrate (CAS 71172-26-4)
- Oxcarbazepine Impurity 25 (CAS 104839-39-6)
- Acetyl tetrapeptide-9(Dermican LS 9837) (CAS 928006-50-2)
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