Sildenafil Impurity 7 CAS 139756-22-2
Purity >95%In StockPharmacopoeial Impurity Standards
| CAS No. | 139756-22-2 |
| Molecular Formula | C17H19ClN4O4S |
| Molecular Weight | 410.88 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Sildenafil Impurity 7 (CAS 139756-22-2) is a high-purity pharmacopoeial impurity standards reference standard from CATO, an ISO 17034 accredited reference material producer. Molecular formula: C17H19ClN4O4S. Molecular weight: 410.88 g/mol. Each batch is supplied with a Certificate of Analysis (COA).
Physical & Chemical Properties
| Molecular Formula | C17H19ClN4O4S |
| Molecular Weight | 410.88 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1996 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 4 |
| Sulfur Atoms | 1 |
Related Sildenafil Standards
- Sildenafil Impurity 6 (CAS 501120-42-9)
- Sildenafil Impurity 79 (CAS CATO-C4X-112879)
- Sildenafil Impurity 68 (CAS CATO-C4X-112868)
- Sildenafil Impurity 15 (CAS 2512206-40-3)
- Sildenafil Impurity 269 (CAS CATO-C4X-1128269)
- Sildenafil Impurity 292 (CAS CATO-C4X-1128292)
- Sildenafil Impurity 38 (CAS 319491-68-4)
- Sildenafil Impurity 102 (CAS CATO-C4X-1128102)
Recommended Standards
- 2-Formyl Loratadine (CAS 1076198-15-6)
- Methyl 4-amino-3-(4-(4-chlorophenyl)thiazol-2-yl)-1-phenyl-1h-pyrazole-5-carboxylate (CAS 878260-11-8)
- 4-Formyl Loratadine (CAS 1076198-16-7)
- Empagliflozin Impurity 44 (CAS CATO-C4X-106544)
- Azilsartan Impurity 21 (CAS 136285-67-1)
- 216393-64-5 4 - Bromo - 2 - fluorophenylboronic acid 4-Bromo-2-fluorobenzeneboronic acid boronic acid, (4-bromo-2-fluorophenyl)- (CAS 216393-64-5)
- 3-Boc-6,6-dibromo-3-azabicyclo[3.1.0]hexane (CAS 2222867-27-6)
- 6-Bromo-8-methyl-2-phenylimidazo[1,2-a]pyridine (CAS 1146911-28-5)
- N-(4-amino-2-chlorophenyl)isobutyramide hydrochloride (CAS 1185096-84-7)
- Semaglutide impurity 215 (CAS CATO-C4X-2226215)
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 13829788188 / jacky.chen@cato-chem.com