Epalrestat Impurity 6 CAS 124782-63-4
| CAS No. | 124782-63-4 |
| Molecular Formula | C15H13NO3S2 |
| Molecular Weight | 319.40 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Epalrestat Impurity 6 (C15H13NO3S2) contains a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage. Its high carbon-to-hydrogen ratio confers good lipid solubility, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
CATO supplies Epalrestat Impurity 6 (CAS 124782-63-4), a pharmacopoeial impurity reference standard (molecular formula C15H13NO3S2, MW 319.40 g/mol) used for the identification and quantification of trace impurities in APIs.
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.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C15H13NO3S2 |
| Molecular Weight | 319.40 g/mol |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1992 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 2 |
Related Epalrestat Standards
- Epalrestat (CAS 82159-09-9)
- Epalrestat (E,Z)-Isomer (CAS 124782-64-5)
- Epalrestat (E,E)-Isomer (CAS 863988-85-6)
- Epalrestat impurity 38 (CAS CATO-C4X-223638)
- Epalrestat-d5 (CAS 2755644-33-6)
- Epalrestat-d5 (CAS CATO-CCAD303149)
- Epalrestat Impurity 17 (CAS 1800597-47-0)
- Epalrestat Impurity 16 (CAS CATO-C4X-223616)
Recommended Standards
- Revefenacin Impurity 59 (CAS CATO-C4X-203159)
- Selexipag Impurity 14 (CAS CATO-C4X-196129)
- Bilastine Impurity 38 (CAS 883106-63-6)
- Imidafenacin (CAS 170105-16-5)
- Rasagiline Impurity 18 (CAS 34698-41-4)
- Darunavir Impurity 16 (CAS 1402142-62-4)
- Tucatinib Impurity 41 (CAS CATO-C4X-260541)
- 1-(2-Aminoethyl)-6-(ethylthio)-N-isobutyl-1H-pyrazolo[3,4-d]pyrimidin-4-amine (CAS 1105197-87-2)
- DCEBIO (CAS 60563-36-2)
- 4-Hydroxy-5-[2,3-O-(1-methylethylidene)-5-O-(triphenylmethyl)-α-D-ribofuranosyl]-1H-pyrazole-3-carboxylic Acid Ethyl Ester (CAS 83686-34-4)
- dispiro[2.0.2⁴.1³]heptan-7-ylmethanol (CAS 422318-76-1)
- Sildenafil Impurity 89 (CAS 2520113-03-3)
- N-Cbz-2-azabicyclo[2.2.1]heptan-7-one (CAS 860265-68-5)
- Semaglutide impurity 37 (CAS CATO-C4X-222637)
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