Eszopiclone impurity 28 Sodium salt CAS CATO-C4X-123828
| CAS No. | CATO-C4X-123828 |
| Molecular Formula | C6H3N2O3 |
| Molecular Weight | N/A |
| 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.
Eszopiclone impurity 28 Sodium salt (CAS CATO-C4X-123828) is a certified pharmaceutical impurity reference standard with the molecular formula C6H3N2O3Na and a molecular weight of 174.09 g/mol.
Eszopiclone impurity 28 Sodium salt (C6H3N2O3Na) contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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), Eszopiclone impurity 28 Sodium 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 | C6H3N2O3 Na |
| Molecular Weight | 174.09 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (faint amine-like odor) |
| 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) | 6.5 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 2 |
Related Eszopiclone Standards
- Eszopiclone-d8 (CAS 1093385-24-0)
- Eszopiclone Impurity 6 (CAS 1122549-43-2)
- Eszopiclone Impurity 27 (CAS 1216659-29-8)
- Eszopiclone (S-Zopiclone) (CAS 138729-47-2)
- Eszopiclone impurity 26 (CAS 151776-26-0)
- Eszopiclone EP Impurity A (CAS 151851-70-6)
- Eszopiclone Impurity 23 (CAS 43200-82-4)
- Eszopiclone Impurity 7 (CAS 43200-83-5)
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