Epalrestat Impurity 53 CAS CATO-C4X-223653
| CAS No. | CATO-C4X-223653 |
| Molecular Formula | C5H4ClNO3S2 |
| Molecular Weight | 225.67 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), Epalrestat Impurity 53 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.
Epalrestat Impurity 53 (CAS CATO-C4X-223653) is a certified pharmaceutical impurity reference standard with the molecular formula C5H4ClNO3S2 and a molecular weight of 225.67 g/mol.
Structurally, Epalrestat Impurity 53 (C5H4ClNO3S2) contains an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution. The molecule exhibits a degree of unsaturation (DBE) of 4.0, corresponding to approximately 4 ring(s) or double-bond equivalent(s). With a molecular weight of 225.67 g/mol, it falls into the medium-molecular-weight range. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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.
Physical & Chemical Properties
| Molecular Formula | C5H4ClNO3S2 |
| Molecular Weight | 225.67 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 2 |
Related Epalrestat Standards
- Epalrestat Impurity 45 (CAS CATO-C4X-223645)
- Epalrestat Impurity 1 (CAS 130786-32-2)
- Epalrestat Impurity 20 (CAS 23176-01-4)
- Epalrestat Impurity 61 (CAS CATO-C4X-223661)
- Epalrestat Impurity 52 (CAS CATO-C4X-223652)
- Epalrestat Impurity 19 (CAS 149789-77-5)
- Epalrestat Impurity 21 (CAS 5718-83-2)
- Epalrestat impurity 28 (CAS 179027-75-9)
Recommended Standards
- Pindolol EP Impurity F (CAS 130115-66-1)
- Trazodone impurity 68 (CAS 2221987-86-4)
- Nerandomilast impurity 4 (CAS CATO-C4X-34734)
- N-Nitroso Trazodone EP Impurity L (CAS 2219339-13-4)
- Brexpiprazole impurity 82 (CAS 2247155-43-5)
- Resmetirom impurity 118 (CAS CATO-C4X-2912118)
- Pregabalin Impurity 54 (CAS 616-42-2)
- Daprodustat Impurity 16 (CAS 30988-17-1)
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