Epalrestat impurity 32 CAS CATO-C4X-223632
| CAS No. | CATO-C4X-223632 |
| Molecular Formula | C3H5NO4S2 |
| Molecular Weight | 183.21 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
As a process- or degradation-related impurity, Epalrestat impurity 32 (CAS CATO-C4X-223632, C3H5NO4S2) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Based on its molecular formula C3H5NO4S2, Epalrestat impurity 32 contains an amide group, a sulfone group, a carboxylic acid group, an ether linkage; these features give the compound characteristic functional-group stretching vibrations in infrared spectroscopy. The molecular weight of 183.21 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.
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.
Physical & Chemical Properties
| Molecular Formula | C3H5NO4S2 |
| Molecular Weight | 183.21 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 | Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 2.0 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 2 |
Related Epalrestat Standards
- Epalrestat Impurity 54 (CAS 1408072-62-7)
- Epalrestat impurity 33 (CAS 39486-57-2)
- Epalrestat Impurity 12 (CAS 109801-00-5)
- Epalrestat Impurity 21 (CAS 5718-83-2)
- Epalrestat impurity 28 (CAS 179027-75-9)
- Epalrestat Impurity 14 (CAS 31061-24-2)
- Epalrestat Impurity 57 (CAS CATO-C4X-223657)
- Epalrestat Impurity 58 (CAS 44912-47-2)
Recommended Standards
- Pranoprofen Impurity 36 (CAS 261-27-8)
- HISTIDINE Impurity 13 (CAS CATO-C4X-323913)
- Doxylamine EP Impurity D (CAS 91-02-1)
- Phenoxazine (CAS 135-67-1)
- Tenofovir alafenamide Impurity 53 (CAS CATO-C4X-179753)
- Vonoprazan Impurity 121 (CAS 13069-92-4)
- Gadoteridol impurity 40 (CAS 137145-75-6)
- 3-(5-(Pyridin-2-yl)-1H-1,2,4-triazol-3-yl)aniline (CAS 1092305-59-3)
- Tert-Butyl (2-(6-Fluoro-1H-Indol-3-Yl)Ethyl)Carbamate (CAS 1158999-98-4)
- 6-Bromo-5-(difluoromethyl)-4-iodopyridine-2-sulfonamide (CAS 1805918-68-6)
- 4-amino-6-chloropyridine-3-carboxylic acid (CAS 1060811-65-5)
- 2'-Deoxy-7-carbaisoguanosine (CAS 103173-80-4)
- N,N-dimethyl-5-(piperidin-2-yl)-1,2,4-oxadiazol-3-amine (CAS 1597268-45-5)
- Liraglutide-d8 Tetratrifluoroacetate (CAS 204656-20-2 (non-labelled, free base))
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