Sildenafil Impurity 11 CAS 139756-03-9
Purity 97%+In StockPharmacopoeial Impurity Standards
| CAS No. | 139756-03-9 |
| Molecular Formula | C17H22N4O3 |
| Molecular Weight | 330.38 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
High-purity Sildenafil Impurity 11 (CAS 139756-03-9) pharmacopoeial impurity standards reference standard. Molecular formula: C17H22N4O3. Molecular weight: 330.38 g/mol. Produced by CATO, one of China's leading reference material manufacturers, with COA documentation and global shipping.
Physical & Chemical Properties
| Molecular Formula | C17H22N4O3 |
| Molecular Weight | 330.38 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) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1996 |
| Nitrogen Atoms | 4 |
Related Sildenafil Standards
- Sildenafil Impurity 96 (CAS CATO-C4X-112896)
- Sildenafil Impurity 93 (CAS CATO-C4X-112893)
- Sildenafil Impurity 298 (CAS CATO-C4X-1128298)
- Sildenafil Impurity 61 (CAS 194602-23-8)
- Sildenafil Impurity 263 (CAS CATO-C4X-1128263)
- Sildenafil Impurity 101 (CAS CATO-C4X-1128101)
- Sildenafil Impurity 259 (CAS CATO-C4X-1128259)
- Sildenafil Impurity 296 (CAS CATO-C4X-1128296)
Recommended Standards
- Tofacitinib Impurity 73 (CAS CATO-C4X-107973)
- N-Nitroso Tofacitinib Impurity 185 (CAS CATO-C4X-1079185)
- Brexpiprazole Impurity 109 (CAS CATO-C4X-1131109)
- Fluconazole Impurity 71 (CAS CATO-C4X-101971)
- Atrasentan Impurity 106 (CAS 1059052-53-7)
- Methyl 3-Oxo-4-Androsten-17-Carboxylate (CAS 2681-55-2)
- 4-(3-Cyano-2-fluorophenyl)phenol (CAS 1261951-45-4)
- 4-(3-Bromo-5-ethoxy-4-hydroxyphenyl)-N-(2-methoxyphenyl)-2-methyl-5-oxo-1,4,5,6,7,8-hexahydroquinoline-3-carboxamide (CAS 494195-84-5)
- 4-Bromo-N-(1,3,4-thiadiazol-2-yl)benzamide (CAS 337468-64-1)
- Biotinyl-S6 Phosphate Acceptor Peptide trifluoroacetate salt (CAS 1815618-12-2)
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