Sildenafil Impurity 292 CAS CATO-C4X-1128292
| CAS No. | CATO-C4X-1128292 |
| Molecular Formula | C18H22N4O5S |
| Molecular Weight | 406.46 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including Sildenafil Impurity 292.
CATO supplies Sildenafil Impurity 292 (CAS CATO-C4X-1128292), a pharmacopoeial impurity reference standard (molecular formula C18H22N4O5S, MW 406.46 g/mol) used for the identification and quantification of trace impurities in APIs.
Owing to a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage, Sildenafil Impurity 292 is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 406.46 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
Recommended for quantitative analysis by HPLC, GC, LC-MS/MS, or GC-MS as an external calibration standard; it can also be used for spiked-recovery experiments, LOD/LOQ determination, and LC-MS/MS multiple-reaction-monitoring (MRM) calibration.
As a certified reference material (CRM), Sildenafil Impurity 292 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 | C18H22N4O5S |
| Molecular Weight | 406.46 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 |
| Degree of Unsaturation (DBE) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 4 |
| Sulfur Atoms | 1 |
Related Sildenafil Standards
- Sildenafil Impurity 15 (CAS 2512206-40-3)
- Sildenafil Impurity 269 (CAS CATO-C4X-1128269)
- Sildenafil Impurity 38 (CAS 319491-68-4)
- 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
- Glipizide Impurity 12 (CAS CATO-C4X-140712)
- Peficitinib Impurity 25 (CAS 2055576-48-0)
- Vardenafil Impurity 53 (CAS CATO-C4X-101753)
- O1-Benzyl O2-ethyl cis-5-(tert-Butoxycarbonylamino)piperidine-1,2-dicarboxylate (CAS 1078129-20-0)
- Caspofungin Impurity 46 HAc (CAS CATO-C4X-157546)
- Paliperidone Impurity 78 (CAS 691007-05-3)
- Etamsylate Impurity 1 (CAS CATO-C4X-28541)
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