Epalrestat Impurity 19 CAS 149789-77-5
| CAS No. | 149789-77-5 |
| Molecular Formula | C6H7NO3S2 |
| Molecular Weight | 205.25 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Owing to an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system, Epalrestat Impurity 19 is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 205.25 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 process- or degradation-related impurity, Epalrestat Impurity 19 (CAS 149789-77-5, C6H7NO3S2) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
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.
As a certified reference material (CRM), Epalrestat Impurity 19 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 | C6H7NO3S2 |
| Molecular Weight | 205.25 g/mol |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| 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 |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1999 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 2 |
Related Epalrestat Standards
- Epalrestat Impurity 61 (CAS CATO-C4X-223661)
- Epalrestat Impurity 21 (CAS 5718-83-2)
- Epalrestat impurity 28 (CAS 179027-75-9)
- Epalrestat Impurity 20 (CAS 23176-01-4)
- Epalrestat Impurity 12 (CAS 109801-00-5)
- Epalrestat impurity 33 (CAS 39486-57-2)
- Epalrestat Impurity 54 (CAS 1408072-62-7)
- Epalrestat Impurity 45 (CAS CATO-C4X-223645)
Recommended Standards
- Benazepril Impurity 14 (CAS CATO-C4X-209614)
- Mirogabalin Impurity 152 (CAS CATO-C4X-2924152)
- Butylphthalide Impurity 24 (CAS 20871-32-3)
- Mirogabalin Impurity 73 (CAS 1644251-58-0)
- Vonoprazan Fumarate Impurity 15 (CAS 636-73-7)
- Dapagliflozin Impurity 8 (CAS 1662702-90-0)
- Dronedarone Impurity 83 (CAS 856758-05-9)
- H-Arg-OMe · 2 HCl (CAS 26340-89-6)
- tert-Butyl (2S,4S)-4-amino-2-(cyanomethyl)piperidine-1-carboxylate (CAS 2667055-48-1)
- 3-Phenylisothiazole-4-carboxylic acid (CAS 18160-82-2)
- Dotinurad Impurity 98 (CAS CATO-C4X-249498)
- Quinoxaline-6,7-diol (CAS 19506-20-8)
- 1-Methyl-1H-indole-3-carboximidamide (CAS 730237-52-2)
- D-allo-Thr7-Semaglutide (CAS CATO-C4X-2226242)
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