Epalrestat Impurity 23 CAS CATO-C4X-223623
| CAS No. | CATO-C4X-223623 |
| Molecular Formula | C15H13NO4S2 |
| Molecular Weight | 335.40 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.
CATO supplies Epalrestat Impurity 23 (CAS CATO-C4X-223623), a pharmacopoeial impurity reference standard (molecular formula C15H13NO4S2, MW 335.40 g/mol) used for the identification and quantification of trace impurities in APIs.
Structurally, Epalrestat Impurity 23 (C15H13NO4S2) contains a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 10.0, corresponding to approximately 10 ring(s) or double-bond equivalent(s). With a molecular weight of 335.40 g/mol, it falls into the moderately-high-molecular-weight range. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 | C15H13NO4S2 |
| Molecular Weight | 335.40 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| 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 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 2 |
Related Epalrestat Standards
- Epalrestat impurity 48 (CAS CATO-C4X-223648)
- Epalrestat Impurity 16 (CAS CATO-C4X-223616)
- Epalrestat Impurity 62 (CAS 682775-70-8)
- Epalrestat impurity 36 (CAS CATO-C4X-223636)
- Epalrestat-d5 (CAS 2755644-33-6)
- Epalrestat-d5 (CAS CATO-CCAD303149)
- Epalrestat Impurity 12 (CAS CATO-C4X-223612)
- Epalrestat (CAS 82159-09-9)
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Why CATO?
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- 130,000+ catalog items in stock, COA supplied with every batch
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- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com