Epalrestat Impurity 58 CAS 44912-47-2
| CAS No. | 44912-47-2 |
| Molecular Formula | C4H7NO2S2 |
| Molecular Weight | 165.23 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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 supplies Epalrestat Impurity 58 (CAS 44912-47-2), a pharmacopoeial impurity reference standard (molecular formula C4H7NO2S2, MW 165.23 g/mol) used for the identification and quantification of trace impurities in APIs.
Based on its molecular formula C4H7NO2S2, Epalrestat Impurity 58 contains an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage; these features give the compound characteristic functional-group stretching vibrations in infrared spectroscopy. The molecular weight of 165.23 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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 certified reference material (CRM), Epalrestat Impurity 58 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 | C4H7NO2S2 |
| Molecular Weight | 165.23 g/mol |
| Purity | ≥95% |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 2.0 |
| CAS Registry Year (est.) | 1969 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 2 |
Related Epalrestat Standards
- Epalrestat Impurity 57 (CAS CATO-C4X-223657)
- Epalrestat impurity 29 (CAS CATO-C4X-223629)
- Epalrestat impurity 31 (CAS CATO-C4X-223631)
- Epalrestat Impurity 14 (CAS 31061-24-2)
- Epalrestat impurity 32 (CAS CATO-C4X-223632)
- Epalrestat Impurity 13 (CAS 66051-14-7)
- Epalrestat Impurity 25 (CAS 15174-47-7)
- Epalrestat Impurity 54 (CAS 1408072-62-7)
Recommended Standards
- 4-(1-(Ethylamino)ethyl)phenol (CAS CATO-C4X-32582)
- Phenacetin Impurity 2 (CAS 65570-13-0)
- 1-Amino-2-Phenylbutan-2-Ol (CAS 770-65-0)
- Revefenacin impurity 31 (CAS CATO-C4X-203131)
- Midecamycin Impurity 10 (CAS CATO-C4X-312210)
- Parecoxib Impurity 46 (CAS 477594-28-8)
- Ezetimibe Impurity 119 (CAS 914777-32-5)
- 2-[(2-Thienylcarbonyl)amino]-1,3-oxazole-4-carboxylic acid (CAS 1204297-76-6)
- 3-Amino-4-(3-fluoro-4-methoxyphenyl)butanoic acid (CAS 1369340-91-9)
- 1-Benzyl-2-methylpiperazine dihydrochloride (CAS 93138-53-5)
- 1-(3-Fluoro-2-nitrophenyl)-1h-pyrazole (CAS 1250276-77-7)
- 3-(3-Fluoro-1H-pyrazol-4-yl)-5-methylpiperidine (CAS 2365342-74-9)
- (S)-methyl 6-oxopiperidine-3-carboxylate (CAS 1931997-10-2)
- Semaglutide impurity 41 (CAS CATO-C4X-222641)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
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- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com