Sildenafil Impurity 285 CAS CATO-C4X-1128285
| CAS No. | CATO-C4X-1128285 |
| Molecular Formula | C20H28N4O6S |
| Molecular Weight | 452.52 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Based on its molecular formula C20H28N4O6S, Sildenafil Impurity 285 contains a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 452.52 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
CATO supplies Sildenafil Impurity 285 (CAS CATO-C4X-1128285), a pharmacopoeial impurity reference standard (molecular formula C20H28N4O6S, MW 452.52 g/mol) used for the identification and quantification of trace impurities in APIs.
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 285 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 | C20H28N4O6S |
| Molecular Weight | 452.52 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) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 4 |
| Sulfur Atoms | 1 |
Related Sildenafil Standards
- Sildenafil Impurity 245 (CAS CATO-C4X-1128245)
- Sildenafil Impurity 246 (CAS 1786437-29-3)
- Sildenafil Impurity 270 (CAS 1229017-26-8)
- Sildenafil Impurity 271 (CAS 1229017-15-5)
- Sildenafil Impurity 284 (CAS CATO-C4X-1128284)
- Sildenafil EP Impurity C (CAS 139755-91-2)
- Sildenafil Impurity 291 (CAS CATO-C4X-1128291)
- Sildenafil EP Impurity F (CAS 139755-82-1)
Recommended Standards
- Apremilast Impurity 78 (CAS CATO-C4X-100978)
- Cefixime Impurity 27 (CAS 29126-11-2)
- WAY-640879 (CAS 851212-80-1)
- Tris(2-isopropylphenyl) Phosphate (CAS 64532-95-2)
- Eltrombopag Impurity 130 (CAS CATO-C4X-1198130)
- Tinidazole EP Impurity B (CAS 25459-12-5)
- Butalbital Impurity 2 (CAS 3146-66-5)
- 2-Phenylthiazole-4-sulfonyl Chloride (CAS 1305712-05-3)
- 3-Benzyl-1-[(tert-butoxy)carbonyl]azetidine-3-carboxylic acid (CAS 1361114-24-0)
- Wnt-C59 (CAS 1243243-89-1)
- 1-(2,4-Difluorophenyl)-5-(1h-pyrrol-1-yl)-1h-pyrazole-4-carboxylic acid (CAS 1224169-67-8)
- 2-Amino-5-bromo-1H-benzo[d]imidazol-7-ol (CAS 1804270-43-6)
- Evolitrine (CAS 523-66-0)
- Tirzepatide Impurity 21 X TFA Salt (CAS CATO-C4X-324021)
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 18665070610 / Nicole.chen@cato-chem.com