Vardenafil EP Impurity A CAS 2169247-39-4
| CAS No. | 2169247-39-4 |
| Molecular Formula | C21H28N6O4S |
| Molecular Weight | 460.55 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 460.55 g/mol gives Vardenafil EP Impurity A distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
CATO supplies Vardenafil EP Impurity A (CAS 2169247-39-4), a pharmacopoeial impurity reference standard (molecular formula C21H28N6O4S, MW 460.55 g/mol) used for the identification and quantification of trace impurities in APIs.
Owing to a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage, Vardenafil EP Impurity A is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 460.55 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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.
CATO manufactures Vardenafil EP Impurity A under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C21H28N6O4S |
| Molecular Weight | 460.55 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 |
| Degree of Unsaturation (DBE) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1998 |
| Nitrogen Atoms | 6 |
| Sulfur Atoms | 1 |
Related Vardenafil Standards
- Vardenafil USP Related Compound E (CAS 448184-46-1)
- Vardenafil EP impurity A (CAS CATO-C4X-101722)
- Vardenafil Impurity 66 (CAS CATO-C4X-101766)
- Vardenafil Impurity N19 (CAS 2411340-39-9)
- Vardenafil Impurity 36 (CAS 224788-36-7)
- Vardenafil Impurity 31 (CAS CATO-C4X-101731)
- Vardenafil Acetyl Analogue (CAS 1261351-28-3)
- Vardenafil Acetyl-d5 Analogue (CAS 1330171-51-1)
Recommended Standards
- Sildenafil EP Impurity F (CAS 139755-82-1)
- N-(4-methoxyphenyl)-2-((5-(2-methoxyphenyl)-4-(p-tolyl)-4H-1,2,4-triazol-3-yl)thio)acetamide (CAS 333313-43-2)
- Sildenafil Impurity 51 (CAS 263897-18-3)
- N-(2-methoxyphenyl)-2-((5-(phenoxymethyl)-4-(p-tolyl)-4H-1,2,4-triazol-3-yl)thio)acetamide (CAS 333322-50-2)
- Leflunomide Impurity 19 (CAS 51135-73-0)
- Ambroxol Impurity 66 (CAS CATO-C4X-108566)
- Ceftiofur Impurity 7 (CAS CATO-C4X-15817)
- 4-(Difluoromethyl)-6-hydroxy-2-(trifluoromethoxy)nicotinaldehyde (CAS 1806160-00-8)
- 1,2,3,4-tetrahydro-7-methoxy-3-phenyl-Isoquinoline, hydrochloride (1:1) (CAS 1394040-36-8)
- (3-Aminopyrrolidin-3-yl)methanol (CAS 125033-01-4)
- 1-Methyl-4-(6-nitrobenzo[d][1,3]dioxol-5-yl)piperazine (CAS 1706434-94-7)
- 3-((tert-Butoxycarbonylamino)methyl)-5-methoxyisonicotinic acid (CAS 1138444-21-9)
- (R)-2-((R)-2-Amino-3-phenylpropanamido)propanoic acid (CAS 76612-31-2)
- Semaglutide impurity 273 (CAS CATO-C4X-2226273)
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