Vardenafil Impurity 34 CAS CATO-C4X-101734
| CAS No. | CATO-C4X-101734 |
| Molecular Formula | C23H32N6O4S |
| Molecular Weight | 488.60 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
As a process- or degradation-related impurity, Vardenafil Impurity 34 (CAS CATO-C4X-101734, C23H32N6O4S) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Owing to a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage, Vardenafil Impurity 34 is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 488.60 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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).
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 | C23H32N6O4S |
| Molecular Weight | 488.60 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) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 6 |
| Sulfur Atoms | 1 |
Related Vardenafil Standards
- Vardenafil (CAS 224785-90-4)
- Vardenafil Impurity 35 (CAS CATO-C4X-101735)
- Vardenafil Impurity 58 (CAS CATO-C4X-101758)
- 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
- Thieno[3,2-b]furan, 5,6-bis(4-methoxyphenyl)-2,3-diphenyl- (CAS 81385-77-5)
- Sildenafil EP Impurity A (CAS 1391053-95-4)
- N-(2-ethyl-6-methylphenyl)-2-((5-((4-methoxyphenoxy)methyl)-4-phenyl-4H-1,2,4-triazol-3-yl)thio)acetamide (CAS 332912-84-2)
- Meropenem Impurity 49 (CAS CATO-C4X-130949)
- Paclitaxel EP Impurity K (CAS 148930-55-6)
- Irbesartan impurity 37 (CAS 1415462-83-7)
- Benidipine Impurity 49 (CAS CATO-C4X-112049)
- (1-Isopropyl-4-methyl-1H-pyrazol-5-yl)boronic acid (CAS 2750602-15-2)
- 5-Bromo-2-methylbenzene-1-sulfonyl chloride (CAS 69321-56-8)
- 2-((3,3-Dimethyl-3,4-dihydro-2H-pyrrol-5-yl)methyl)succinonitrile (CAS 89730-95-0)
- N-[3-(4-Bromo-3,5-dimethyl-1H-pyrazol-1-yl)propyl]-N,N-dimethylamine (CAS 1170608-73-7)
- 7-Chloro-3-heptyne (CAS 51575-85-0)
- 7-Bromo-5H-pyrrolo[2,3-b]pyrazine-2-carboxylic acid (CAS 2168444-66-2)
- Antiarrhythmic peptide (cattle atrium) (CAS 81771-37-1)
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