Vardenafil Impurity 35 CAS CATO-C4X-101735
| CAS No. | CATO-C4X-101735 |
| Molecular Formula | C21H27N7O5S |
| Molecular Weight | 489.55 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), Vardenafil Impurity 35 meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Vardenafil Impurity 35 (CAS CATO-C4X-101735) is a certified pharmaceutical impurity reference standard with the molecular formula C21H27N7O5S and a molecular weight of 489.55 g/mol.
The molecular framework of Vardenafil Impurity 35 (C21H27N7O5S) is characterized by a flavonoid core, an amide group, a sulfone 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 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.
Physical & Chemical Properties
| Molecular Formula | C21H27N7O5S |
| Molecular Weight | 489.55 g/mol |
| Purity | 97%+ |
| 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 |
| Degree of Unsaturation (DBE) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 7 |
| Sulfur Atoms | 1 |
Related Vardenafil Standards
- Vardenafil Impurity 58 (CAS CATO-C4X-101758)
- Vardenafil Impurity 34 (CAS CATO-C4X-101734)
- Vardenafil (CAS 224785-90-4)
- Vardenafil-d5 (CAS 1189685-70-8)
- Vardenafil Impurity 40 (CAS CATO-C4X-101740)
- Vardenafil Impurity 43 (CAS CATO-C4X-101743)
- Vardenafil Impurity 38 (CAS 224787-06-8)
- Vardenafil Impurity 41 (CAS CATO-C4X-101741)
Recommended Standards
- N-(2,3-Dihydrobenzo[b][1,4]dioxin-6-yl)-2-((4-(4-ethoxyphenyl)-5-(pyridin-3-yl)-4H-1,2,4-triazol-3-yl)thio)acetamide (CAS 477330-75-9)
- 4-(4-((2,3-Dihydrobenzo[b][1,4]dioxin-6-yl)sulfonyl)piperazin-1-yl)-2-(pyridin-3-yl)quinazoline (CAS 851185-20-1)
- N-Nitroso Sildenafil EP Impurity F (CAS CATO-C4X-112883)
- N-((1R,2R)-2-(3-(3,5-Bis(trifluoromethyl)phenyl)thioureido)cyclohexyl)-2-methylpropane-2-sulfinamide (CAS 959979-36-3)
- Vancomycin EP Impurity H (CAS 357396-41-9)
- Ribociclib Impurity 30 (CAS CATO-C4X-310030)
- Canagliflozin Impurity 43 (CAS CATO-C4X-112343)
- 4-[(1-Hydroxycyclobutyl)methyl]piperazin-2-one (CAS 2098500-76-4)
- 5-[(4-Chlorophenyl)sulfanyl]-1,3-thiazolidine-2,4-dione (CAS 204848-73-7)
- 4,5-Difluoro-2-iodopyridine (CAS 1806368-02-4)
- 1-(4-chlorophenyl)-2,3-dimethylbutan-2-amine (CAS 1742-31-0)
- Benzyl 3-bromo-4-oxopyrrolidine-1-carboxylate (CAS 2089377-01-3)
- 1-(3,4,5-Trimethoxyphenyl)-4-piperidinone, 97% (CAS 94634-99-8)
- Macrocyclic Peptide flaviviridae Viruses InhibitorDISCONTINUED (CAS 1510841-23-2)
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