Nemonoxacin Impurity 39 CAS 221221-39-2
| CAS No. | 221221-39-2 |
| Molecular Formula | C19H23N3O4 |
| Molecular Weight | 357.40 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies Nemonoxacin Impurity 39 (CAS 221221-39-2), a pharmacopoeial impurity reference standard (molecular formula C19H23N3O4, MW 357.40 g/mol) used for the identification and quantification of trace impurities in APIs.
Nemonoxacin Impurity 39 (C19H23N3O4) contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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 | C19H23N3O4 |
| Molecular Weight | 357.40 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| 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 |
| Degree of Unsaturation (DBE) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2020 |
| Nitrogen Atoms | 3 |
Related Nemonoxacin Standards
- Nemonoxacin Impurity 31 (CAS CATO-C4X-312831)
- Nemonoxacin Impurity 44 (CAS CATO-C4X-312844)
- Nemonoxacin Impurity 77 (CAS CATO-C4X-312877)
- Nemonoxacin Impurity 86 (CAS CATO-C4X-312886)
- Nemonoxacin Impurity 89 (CAS CATO-C4X-312889)
- Nemonoxacin Impurity 57 (CAS CATO-C4X-312857)
- Nemonoxacin (CAS 378746-64-6)
- Nemonoxacin Impurity 7 (CAS CATO-C4X-31287)
Recommended Standards
- N-Nitroso Labetalol (Mixture of Diastereomers) (CAS 2820170-74-7)
- Nicergoline Impurity 31 (CAS CATO-C4X-208531)
- Ketorolac impurity 64 (CAS 141031-78-9)
- (2R,3S)-N-Benzoyl-o-(1-ethoxyethyl)-3-phenylisoserine (CAS 216094-54-1)
- Acetyl Empagliflozin Impurity 148 (CAS CATO-C4X-1065148)
- Albendazole Impurity N78 (CAS 139751-05-6)
- Cilnidipine Impurity 2 (CAS 146845-34-3（free，base）)
- Methylprednisolone suleptanate sodium salt (CAS 90350-40-6)
- 1-(2-Cyanophenyl)propan-1-one (CAS 6955-26-6)
- Alcian Blue, pyridine variant (CAS 123439-83-8)
- ethyl 1-fluoro-3-hydroxy-cyclobutanecarboxylate (CAS 2231675-40-2)
- 3-(5,6,7,8-Tetrahydroimidazo[1,2-a]pyridin-2-yl)propan-1-amine (CAS 1540951-17-4)
- Ethyl (E)-2-(2-(4-methylstyryl)-1H-benzo[d]imidazol-1-yl)acetate (CAS 400078-14-0)
- Semaglutide impurity 198 (CAS CATO-C4X-2226198)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com