Sildenafil Impurity 77 CAS CATO-C4X-112877
| CAS No. | CATO-C4X-112877 |
| Molecular Formula | C13H18N2O5S |
| Molecular Weight | 314.36 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.
Sildenafil Impurity 77 (CAS CATO-C4X-112877) is a certified pharmaceutical impurity reference standard with the molecular formula C13H18N2O5S and a molecular weight of 314.36 g/mol.
The molecular framework of Sildenafil Impurity 77 (C13H18N2O5S) is characterized by a nitrogen-containing heterocyclic scaffold, 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. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
CATO manufactures Sildenafil Impurity 77 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 | C13H18N2O5S |
| Molecular Weight | 314.36 g/mol |
| Purity | >95% |
| 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) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Sildenafil Standards
- Sildenafil Impurity 299 (CAS CATO-C4X-1128299)
- Sildenafil Impurity 69 (CAS CATO-C4X-112869)
- Sildenafil Impurity 2 (CAS 332374-42-2)
- Sildenafil Impurity 31 (CAS CATO-C4X-112831)
- Sildenafil Impurity 259 (CAS CATO-C4X-1128259)
- Sildenafil Impurity 101 (CAS CATO-C4X-1128101)
- Sildenafil Impurity 92 (CAS CATO-C4X-112892)
- Sildenafil Impurity 263 (CAS CATO-C4X-1128263)
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- Ethyl 4-(5-oxo-3-propyl-4,5-dihydro-1h-pyrazol-1-yl)benzoate (CAS 701217-05-2)
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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