Epalrestat Impurity 44 Disodium Salt CAS CATO-C4X-223644
| CAS No. | CATO-C4X-223644 |
| Molecular Formula | C5H5NO4S2 |
| Molecular Weight | N/A |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
The molecular framework of Epalrestat Impurity 44 Disodium Salt (C5H5NO4S2Na) is characterized by a carbohydrate-derived structure, an amide group, a sulfone group. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
As a process- or degradation-related impurity, Epalrestat Impurity 44 Disodium Salt (CAS CATO-C4X-223644, C5H5NO4S2Na) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
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.
As a certified reference material (CRM), Epalrestat Impurity 44 Disodium Salt 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 | C5H5NO4S2 2*Na |
| Molecular Weight | 230.21 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 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 2 |
Related Epalrestat Standards
- Epalrestat Impurity 12 (CAS 109801-00-5)
- Epalrestat Impurity 4 (CAS 1151944-57-8)
- Epalrestat impurity 40 Ammonium Salt (CAS 116636-84-1(Free acid）)
- Epalrestat Impurity 6 (CAS 124782-63-4)
- Epalrestat (E,Z)-Isomer (CAS 124782-64-5)
- Epalrestat Impurity 1 (CAS 130786-32-2)
- Epalrestat Impurity 54 (CAS 1408072-62-7)
- Epalrestat Impurity 21 (CAS 1431637-29-4)
Recommended Standards
- Dacomitinib Impurity 34 (CAS CATO-C4X-208634)
- Flunarizine Impurity 25 (CAS 365-22-0)
- Rosuvastatin EP Impurity A (Calcium Salt) (CAS 1714147-47-3)
- (E)-2-(3-chlorostyryl)-4-(4-heptylphenyl)-5-oxo-5H-indeno[1,2-b]pyridine-3-carbonitrile (CAS 685107-65-7)
- Benzyl 3-(2-chloro-N-cyclopropylacetamido)pyrrolidine-1-carboxylate (CAS 1353959-73-5)
- Ethyl 7-methoxy-2-(trifluoromethyl)pyrazolo[1,5-a]pyridine-3-carboxylate (CAS 1219130-35-4)
- 2-(4-Chloro-2-fluorophenyl)-2,2-difluoroacetic acid (CAS 1523486-08-9)
- 8-Hydroxy-2-(4-nitrophenyl)quinazolin-4(1H)-one (CAS 172462-88-3)
- 1,4-Bis(trifluoromethyl)-2,5-dihydroxybenzene (CAS 203579-41-3)
- Insulin Degludec Impurity 24 (CAS CATO-C4X-215724)
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