Ethosuximide impurity 4 CAS CATO-C4X-26254
| CAS No. | CATO-C4X-26254 |
| Molecular Formula | C7H13NO3 |
| Molecular Weight | 159.18 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Owing to an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage, Ethosuximide impurity 4 is typically white to off-white crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 159.18 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
Ethosuximide impurity 4 (CAS CATO-C4X-26254) is a certified pharmaceutical impurity reference standard with the molecular formula C7H13NO3 and a molecular weight of 159.18 g/mol.
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.
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.
Physical & Chemical Properties
| Molecular Formula | C7H13NO3 |
| Molecular Weight | 159.18 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 |
Related Ethosuximide Standards
- Ethosuximide impurity 5 (CAS CATO-C4X-26255)
- Ethosuximide impurity 3 (CAS 1233954-48-7)
- Ethosuximide EP Impurity A (CAS 631-31-2)
- Ethosuximide impurity 12 (CAS CATO-C4X-262512)
- Ethosuximide impurity 8 (CAS CATO-C4X-26258)
- Ethosuximide-d5 (CAS 1989660-59-4)
- Ethosuximide-d3 (CAS 1189703-33-0)
- Ethosuximide Impurity 2 (CAS 84590-14-7)
Recommended Standards
- Lysine Impurity 12 (CAS 44978-39-4)
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- Abemaciclib Impurity 13 (CAS 1648707-16-7)
- Dalilesen impurity 24 (CAS CATO-C4X-301024)
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