Sildenafil Impurity 55 CAS 92945-27-2
| CAS No. | 92945-27-2 |
| Molecular Formula | C9H14N2O2 |
| Molecular Weight | 182.22 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 55 (CAS 92945-27-2) is a certified pharmaceutical impurity reference standard with the molecular formula C9H14N2O2 and a molecular weight of 182.22 g/mol.
Owing to an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage, Sildenafil Impurity 55 is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 182.22 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
As a certified reference material (CRM), Sildenafil Impurity 55 meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C9H14N2O2 |
| Molecular Weight | 182.22 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (faint amine-like odor) |
| 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) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1983 |
| Nitrogen Atoms | 2 |
Related Sildenafil Standards
- Sildenafil Impurity 3 (CAS 139756-02-8)
- Sildenafil Impurity 47 (CAS 247583-78-4)
- Sildenafil Impurity 60 (CAS 503064-95-7)
- Sildenafil Impurity 58 (CAS 383427-88-1)
- Sildenafil Impurity 62 (CAS 116833-23-9)
- Sildenafil Impurity 1 (CAS 42926-52-3)
- Sildenafil Pyrimidine Impurity (CAS 1346600-82-5)
- Sildenafil Impurity 30 (CAS 59259-90-4)
Recommended Standards
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- Netupitant Impurity 25 (CAS 1314651-44-9)
- Pemafibrate Impurity 92 (CAS CATO-C4X-290392)
- Rimegepant Impurity 18 (CAS 1289023-95-5)
- 3,6-dihydro-2h-pyran-4-carbonitrile (CAS 105772-13-2)
- Fruquintinib Impurity 11 (CAS CATO-C4X-303711)
- N-(Carboxymethyl)-N,N,N-trimethyl-d9-ammonium Chloride (CAS 285979-85-3)
- Methyl 3-((tert-butoxycarbonyl)amino)-2-(4-methylbenzyl)propanoate (CAS 886366-49-0)
- Rac Didemethyl Citalopram Hydrochloride (CAS 1189694-81-2)
- 5-Bromo-2-fluoro-N-(pyridin-2-ylmethyl)benzamide (CAS 941186-50-1)
- Peptide Fmoc-Thi-Thi-OH (CAS CATO-CPTD788552)
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