Sildenafil Impurity 308 CAS CATO-C4X-1128308
| CAS No. | CATO-C4X-1128308 |
| Molecular Formula | C10H12O6S |
| Molecular Weight | 260.26 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 308 (CAS CATO-C4X-1128308) is a certified pharmaceutical impurity reference standard with the molecular formula C10H12O6S and a molecular weight of 260.26 g/mol.
The molecular framework of Sildenafil Impurity 308 (C10H12O6S) is characterized by a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. In reversed-phase chromatography, its retention is governed primarily by the polarity and ionization state of its functional groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. 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).
As a certified reference material (CRM), Sildenafil Impurity 308 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 | C10H12O6S |
| Molecular Weight | 260.26 g/mol |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Sulfur Atoms | 1 |
Related Sildenafil Standards
- Sildenafil Impurity 57 (CAS 200575-16-2)
- Sildenafil Impurity 53 (CAS 2021224-02-0)
- Sildenafil Impurity 294 (CAS 200575-17-3)
- Sildenafil Impurity SM2 (CAS 202066-14-6)
- Sildenafil Impurity 28 (CAS 139756-26-6)
- Sildenafil Impurity 247 (CAS 360068-47-9)
- Sildenafil Impurity 34 (CAS CATO-C4X-112834)
- Sildenafil Impurity N6 (CAS 1004455-71-3)
Recommended Standards
- (3R)-3-[(4-Trifluoromethylphenyl)amino]pentanamide (3R)-3-[[4-(trifluoromethyl)phenyl]amino]pentanamide (R)-3-[[4-(Trifluoromethyl)phenyl]amino]pentanamide 667937-05-5 (CAS 667937-05-5)
- Azacitidine Impurity 37 (5-(Hydroxymethyl)-2’-deoxycytidine-d3) (CAS CATO-C4X-138837)
- N1-(4-cyclopropyl-6-(trifluoromethyl)pyrimidin-2-yl)propane-1,3-diamine (CAS 860790-29-0)
- Flurbiprofen Impurity 16 (CAS 52807-12-2)
- Uridine Impurity 23 (CAS CATO-C4X-233423)
- Venetoclax Impurity 124 (CAS CATO-C4X-2495124)
- Menaquinone impurity 15 (CAS 74610-11-0)
- 1,2,3,4-Tetrahydro-5-methylisoquinoline HCl (CAS 41565-80-4)
- [1-(2-methylpropyl)-1H-imidazol-2-yl]methanamine (CAS 1216209-29-8)
- 3-Amino-N-(tert-butyl)propanamide hydrochloride (CAS 1103861-54-6)
- 1,6-Dimethyl-2-oxo-4-(trifluoromethyl)-1,2-dihydropyridine-3-carboxylic acid (CAS 1378259-60-9)
- Fluoxetine Impurity 4 (CAS 402-45-9)
- Vilanterol Impurity 44 (CAS CATO-C4X-193544)
- Insulin Lispro (CAS 133107-64-9)
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