Pazufloxacin lmpurity21 HCI CAS 171567-51-4
| CAS No. | 171567-51-4 |
| Molecular Formula | C15H15FN2O3 |
| Molecular Weight | N/A |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 326.75 g/mol gives Pazufloxacin lmpurity21 HCI distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
As a process- or degradation-related impurity, Pazufloxacin lmpurity21 HCI (CAS 171567-51-4, C15H15FN2O3HCl) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
The molecular framework of Pazufloxacin lmpurity21 HCI (C15H15FN2O3HCl) is characterized by a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, fluorine/chlorine substitution. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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.
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 | C15H15FN2O3 HCl |
| Molecular Weight | 326.75 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | >95% |
| 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) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2006 |
| Halogen Content | F/Cl-containing |
| Nitrogen Atoms | 2 |
Related Pazufloxacin Standards
- Pazufloxacin (CAS 127045-41-4)
- ent-Pazufloxacin-d4 Mesylate (CAS 1346602-24-1)
- Pazufloxacin-d4 Mesylate (CAS 1346602-97-8)
- Pazufloxacin Impurity 8 (CAS 136905-87-8)
- Pazufloxacin Mesilate (CAS 163680-77-1)
- Pazufloxacin Impurity 17 (CAS 164851-44-9)
- Pazufloxacin Impurity 20 (CAS 165071-03-4)
- Pazufloxacin Impurity 10 (CAS 165071-09-0)
Recommended Standards
- Ambroxol Maillard Lactose Impurity 7(Ambroxol Impurity 76) (CAS CATO-C4X-108576)
- Cefadroxil Impurity 8 (CAS CATO-C4X-12248)
- Clevidipine Butyrate impurity 20 (CAS 2458150-60-0)
- 4-Bromo-2-chloro-5-(trifluoromethyl)-1H-1,3-benzimidazole (CAS 1803902-32-0)
- 3-Methyl-4-propoxybenzoic acid (CAS 93351-65-6)
- 1,2-Dibromo-4-cyclopropoxybenzene (CAS 1243409-73-5)
- 2-Bromo-4-(bromomethyl)-6-(difluoromethyl)nicotinic acid (CAS 1806920-13-7)
- (5-Bromo-2-fluoro-3-methylphenyl)(morpholino)methanone (CAS 2635937-51-6)
- N-Desmethyl Nefopam-d4 HCl (CAS 2747914-61-8)
- Cholecystokinin Octapeptide (desulfated) (H-2070.0005) (CAS 198483-36-2)
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