Epalrestat impurity 34 CAS 82159-06-6
| CAS No. | 82159-06-6 |
| Molecular Formula | C12H9NO3S2 |
| Molecular Weight | 279.33 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Epalrestat impurity 34 (CAS 82159-06-6) is a certified pharmaceutical impurity reference standard with the molecular formula C12H9NO3S2 and a molecular weight of 279.33 g/mol.
Epalrestat impurity 34 (C12H9NO3S2) contains a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage. It is notably hygroscopic, 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. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
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.
CATO manufactures Epalrestat impurity 34 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 | C12H9NO3S2 |
| Molecular Weight | 279.33 g/mol |
| Purity | 97%+ |
| 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; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1980 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 2 |
Related Epalrestat Standards
- Epalrestat Impurity 21 (CAS 1431637-29-4)
- Epalrestat Impurity 4 (CAS 1151944-57-8)
- Epalrestat Impurity 43 (CAS CATO-C4X-223643)
- Epalrestat impurity 35 (CAS CATO-C4X-223635)
- Epalrestat impurity 37 (CAS CATO-C4X-223637)
- Epalrestat Impurity 56 (CAS CATO-C4X-223656)
- Epalrestat Impurity 3 (CAS 794510-29-5)
- Epalrestat Impurity 17 (CAS 1800597-47-0)
Recommended Standards
- Papaverine Impurity 33 (CAS 23818-73-7)
- Tetracaine Impurity 35 (CAS CATO-C4X-192335)
- Salcaprozate Impurity 5 (CAS CATO-C4X-25075)
- Tetracaine Impurity 30 (CAS CATO-C4X-192330)
- Afoxolaner Impurity 21 (CAS 1124305-96-9)
- Podophyllotoxin EP Impurity C (CAS 477-49-6)
- Dorzagliatin Impurity 2 (CAS 1191453-79-8)
- 6-(3-(Trifluoromethyl)-1H-pyrazol-1-yl)pyridin-3-amine (CAS 1006464-92-1)
- Etelcalcetide Impurity 41 X HCl (CAS CATO-C4X-324741)
- (5-Amino-2-chloropyridin-3-yl)methanol (CAS 1260832-02-7)
- 1-(3,4-Dimethoxy-4-nitro-4lambda5-phenyl)ethan-1-one (CAS 4101-32-2)
- 5705-15-7 N-Benzyl-N-phenylhydrazinium(1+) chloride Hydrazine, 1-benzyl-1-phenyl-, hydrochloride Hydrazine, 1-benzyl-1-phenyl-, monohydrochloride (8CI) Hydrazine, 1-phenyl-1-(phenylmethyl)-, hydrochloride (1:1) Hydrazine, 1-phenyl-1-(phenylmethyl)-, monohydrochloride alpha-Benzyl-alpha-phenylhydrazine hydrochloride 1-Benzyl-1-phenylhydrazine hydrochloride 1-Benzyl-1-phenylhydrazine hydrochloride (VAN) EINECS 227-195-7 NSC 5716 USAF EK-1666 (CAS 5705-15-7)
- 1-(4-Iodo-3-(trifluoromethyl)phenyl)ethan-1-one (CAS 1823318-98-4)
- Semaglutide impurity 248 (CAS CATO-C4X-2226248)
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