Epalrestat Impurity 20 CAS 23176-01-4
| CAS No. | 23176-01-4 |
| Molecular Formula | C7H9NO3S2 |
| Molecular Weight | 219.28 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a process- or degradation-related impurity, Epalrestat Impurity 20 (CAS 23176-01-4, C7H9NO3S2) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Owing to an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system, Epalrestat Impurity 20 is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 219.28 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.
CATO manufactures Epalrestat Impurity 20 under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C7H9NO3S2 |
| Molecular Weight | 219.28 g/mol |
| Purity | 97%+ |
| 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.) | 1963 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 2 |
Related Epalrestat Standards
- Epalrestat Impurity 45 (CAS CATO-C4X-223645)
- Epalrestat Impurity 53 (CAS CATO-C4X-223653)
- Epalrestat Impurity 61 (CAS CATO-C4X-223661)
- Epalrestat Impurity 1 (CAS 130786-32-2)
- Epalrestat Impurity 19 (CAS 149789-77-5)
- Epalrestat Impurity 52 (CAS CATO-C4X-223652)
- Epalrestat Impurity 21 (CAS 5718-83-2)
- Epalrestat impurity 28 (CAS 179027-75-9)
Recommended Standards
- Pethidine Hydrochloride EP Impurity C (CAS CATO-C4X-22324)
- Bilastine impurity 80 (CAS 1789305-52-7)
- Elagolix Impurity 81 (CAS CATO-C4X-206881)
- Levocabastine impurity 24 (CAS CATO-C4X-228924)
- Oseltamivir impurity 271 (CAS CATO-C4X-1720271)
- Thiocolchicoside EP Impurity K (CAS CATO-C4X-27703)
- Clindamycin Impurity 151 (CAS CATO-C4X-1341151)
- (3-((1-(tert-Butoxycarbonyl)piperidin-4-yl)methyl)phenyl)boronic acid (CAS 1177559-77-1)
- (2R,3S)-3-Methyl-2-(methylamino)pentanoic Acid (CAS 50673-48-8)
- N-(4-Fluoro-9H-fluoren-2-yl)acetamide (CAS 2823-91-8)
- 6-Chloro-3-iodoimidazo-[1,2-a]pyridine-5-carbaldehyde (CAS 1414864-07-5)
- 6-Bromoimidazo[1,2-a]pyridine-8-carboxylic acid hydrochloride (CAS 1260656-47-0)
- tert-Butyl [(1R,3S)-3-(aminomethyl)cyclohexyl]methylcarbamate hydrochloride (CAS 1049743-64-7)
- Semaglutide impurity 258 (CAS CATO-C4X-2226258)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com