Tunodafil Impurity 4 HCl CAS CATO-C4X-31104
| CAS No. | CATO-C4X-31104 |
| Molecular Formula | C24H33N5O6S |
| Molecular Weight | N/A |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a process- or degradation-related impurity, Tunodafil Impurity 4 HCl (CAS CATO-C4X-31104, C24H33N5O6SHCl) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
The molecular framework of Tunodafil Impurity 4 HCl (C24H33N5O6SHCl) is characterized by a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage, 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.
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 | C24H33N5O6S HCl |
| Molecular Weight | 556.08 g/mol |
| Purity | >95% |
| Storage | Store in a cool place (≤25°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 | Cl-containing |
| Nitrogen Atoms | 5 |
| Sulfur Atoms | 1 |
Related Tunodafil Standards
- Tunodafil Impurity 1 (CAS CATO-C4X-31101)
- Tunodafil Impurity 10 (CAS CATO-C4X-311010)
- Tunodafil Impurity 11 (CAS CATO-C4X-311011)
- Tunodafil Impurity 12 (CAS CATO-C4X-311012)
- Tunodafil Impurity 13 (CAS CATO-C4X-311013)
- Tunodafil Impurity 14 (CAS CATO-C4X-311014)
- Tunodafil Impurity 2 (CAS CATO-C4X-31102)
- Tunodafil Impurity 3 (CAS CATO-C4X-31103)
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