Nemonoxacin impurity 49 CAS CATO-C4X-312849
| CAS No. | CATO-C4X-312849 |
| Molecular Formula | C18H31N3O2 |
| Molecular Weight | 321.46 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
Nemonoxacin impurity 49 (CAS CATO-C4X-312849) is a certified pharmaceutical impurity reference standard with the molecular formula C18H31N3O2 and a molecular weight of 321.46 g/mol.
The molecular framework of Nemonoxacin impurity 49 (C18H31N3O2) is characterized by a steroid core, an amide group, a hydroxyl group, an ether linkage. 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. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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.
Physical & Chemical Properties
| Molecular Formula | C18H31N3O2 |
| Molecular Weight | 321.46 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | ＞90% |
| 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 |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 3 |
Related Nemonoxacin Standards
- Nemonoxacin impurity 48 (CAS CATO-C4X-312848)
- Nemonoxacin impurity 103 (CAS 221221-13-2)
- Nemonoxacin Impurity 23 (CAS CATO-C4X-312823)
- Nemonoxacin Impurity 32 (CAS CATO-C4X-312832)
- Nemonoxacin Impurity 100 (CAS CATO-C4X-3128100)
- Nemonoxacin impurity 105 (CAS 656234-57-0)
- Nemonoxacin Impurity 24 (CAS CATO-C4X-312824)
- Nemonoxacin impurity 108 (CAS CATO-C4X-3128108)
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- 5,12-dihydro-12-phenylindolo[3,2-c]carbazole[1346571-68-3] (CAS 1346571-68-3)
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