Levofloxacin Impurity 40 CAS 106939-30-4
| CAS No. | 106939-30-4 |
| Molecular Formula | C19H22FN3O4 |
| Molecular Weight | 375.39 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Levofloxacin Impurity 40 (CAS 106939-30-4) is a certified pharmaceutical impurity reference standard with the molecular formula C19H22FN3O4 and a molecular weight of 375.39 g/mol.
Based on its molecular formula C19H22FN3O4, Levofloxacin Impurity 40 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 375.39 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
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.
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 | C19H22FN3O4 |
| Molecular Weight | 375.39 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 |
| CAS Registry Year (est.) | 1987 |
| Halogen Content | F-containing |
| Nitrogen Atoms | 3 |
Related Levofloxacin Standards
- Levofloxacin Impurity 34 (CAS 108224-82-4)
- Levofloxacin Methyl Ester (CAS 862690-19-5)
- Levofloxacin impurity 78 (CAS 107359-24-0)
- Levofloxacin Impurity 83 (CAS 1268719-66-9)
- Levofloxacin Impurity 52 (CAS 1152314-62-9)
- Levofloxacin Impurity 88 (CAS CATO-C4X-137188)
- Levofloxacin EP Impurity C(Levofloxacin N-Oxide) (CAS 117678-38-3)
- (R)-Levofloxacin N-Oxide (CAS 117678-37-2)
Recommended Standards
- Retigabine impurity 11 (CAS CATO-C4X-13151)
- Retigabine Impurity 3 (CAS 1263404-73-4)
- Retigabine Impurity 2 (CAS CATO-C4X-13142)
- Gatifloxacin USP RC E (CAS 1029364-65-5)
- Lurasidone Impurity 34 (CAS 6265-30-1)
- Mepivacaine Impurity 4 (CAS 7730-87-2)
- Tofacitinib Impurity 52 (CAS 694495-63-1)
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- [2-(3-Furan-2-yl-[1,2,4]triazol-4-yl)-phenoxy]-acetic acid (CAS 919016-18-5)
- 2-[2,6-Dichloro-4-(trifluoromethyl)phenyl]-1,2-dihydrophthalazin-1-one (CAS 866048-84-2)
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- Tau Peptide (74-102) (Exon 3/Insert 2 Domain) trifluoroacetate salt (CAS 1322695-34-0)
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