Sildenafil Impurity 276 CAS CATO-C4X-1128276
| CAS No. | CATO-C4X-1128276 |
| Molecular Formula | C19H24N4O4 |
| Molecular Weight | 372.42 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 372.42 g/mol gives Sildenafil Impurity 276 distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
As a process- or degradation-related impurity, Sildenafil Impurity 276 (CAS CATO-C4X-1128276, C19H24N4O4) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Structurally, Sildenafil Impurity 276 (C19H24N4O4) contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 10.0, corresponding to approximately 10 ring(s) or double-bond equivalent(s). With a molecular weight of 372.42 g/mol, it falls into the moderately-high-molecular-weight range. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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 Sildenafil Impurity 276 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 | C19H24N4O4 |
| Molecular Weight | 372.42 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| 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 |
| Nitrogen Atoms | 4 |
Related Sildenafil Standards
- Sildenafil Impurity 244 (CAS CATO-C4X-1128244)
- Sildenafil Impurity 100 (CAS CATO-C4X-1128100)
- Sildenafil Impurity 287 (CAS CATO-C4X-1128287)
- Sildenafil Impurity 278 (CAS CATO-C4X-1128278)
- Sildenafil Impurity 52 (CAS CATO-C4X-112852)
- Sildenafil Impurity 261 (CAS CATO-C4X-1128261)
- Sildenafil Impurity 8 (CAS 139756-27-7)
- Sildenafil Impurity 300 (CAS CATO-C4X-1128300)
Recommended Standards
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- 4-Benzenesulfonyl-butyric acid (CAS 6178-52-5)
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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