Sildenafil Impurity 38 CAS 319491-68-4
Purity 97%+In StockPharmacopoeial Impurity Standards
| CAS No. | 319491-68-4 |
| Molecular Formula | C18H23N5O4S |
| Molecular Weight | 405.47 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Sildenafil Impurity 38 (CAS 319491-68-4) is a pharmacopoeial impurity standards certified reference material from CATO. Molecular formula: C18H23N5O4S. Molecular weight: 405.47 g/mol. ISO 17034 accredited production ensures traceable purity and reliable analytical results.
Physical & Chemical Properties
| Molecular Formula | C18H23N5O4S |
| Molecular Weight | 405.47 g/mol |
| Purity | 97%+ |
| 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) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Nitrogen Atoms | 5 |
| Sulfur Atoms | 1 |
Related Sildenafil Standards
- Sildenafil Impurity 15 (CAS 2512206-40-3)
- Sildenafil Impurity 269 (CAS CATO-C4X-1128269)
- Sildenafil Impurity 292 (CAS CATO-C4X-1128292)
- Sildenafil Impurity 68 (CAS CATO-C4X-112868)
- Sildenafil Impurity 79 (CAS CATO-C4X-112879)
- Sildenafil Impurity 6 (CAS 501120-42-9)
- Sildenafil Impurity 7 (CAS 139756-22-2)
- Sildenafil Impurity 9 (CAS 139756-31-3)
Recommended Standards
- N-(2-(4-Methoxyphenyl)quinazolin-4-yl)-4-methylbenzenesulfonamide (CAS 61364-51-0)
- Colchicine-d6 (CAS 1217651-73-4)
- 9-Butyl-8-((3,4,5-trimethoxyphenyl)sulfinyl)-9H-purin-6-amine (CAS 827302-62-5)
- Delafloxacin Impurity 21 (CAS CATO-C4X-263721)
- Aztreonam Impurity 20 (CAS CATO-C4X-152220)
- tert-Butyl (1R*,4R*)-4-(3-methylbenzylamino)cyclohexylcarbamate (CAS 1286273-32-2)
- 1-(4-Fluorophenyl)-5-methyl-N-(3-(trifluoromethyl)phenyl)-1H-1,2,4-triazole-3-carboxamide (CAS 338398-08-6)
- 1,4,5,6-Tetrahydrocyclopenta[c]pyrazole hydrochloride (CAS 1071575-85-3)
- [2-(4-Chlorophenoxy)pyridin-3-yl]methyl N-(2-methylphenyl)carbamate (CAS 338413-66-4)
- D-[His]1-Semaglutide (CAS CATO-C4X-222652)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
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- Technical support: +86 13829788188 / jacky.chen@cato-chem.com