Ramelteon Impurity 23 CAS 196597-30-5
| CAS No. | 196597-30-5 |
| Molecular Formula | C16H19NO2 |
| Molecular Weight | 257.33 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
Ramelteon Impurity 23 (CAS 196597-30-5) is a certified pharmaceutical impurity reference standard with the molecular formula C16H19NO2 and a molecular weight of 257.33 g/mol.
Ramelteon Impurity 23 (C16H19NO2) contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage. Its high carbon-to-hydrogen ratio confers good lipid solubility, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
As a certified reference material (CRM), Ramelteon Impurity 23 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 | C16H19NO2 |
| Molecular Weight | 257.33 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2013 |
| Nitrogen Atoms | 1 |
Related Ramelteon Standards
- Ramelteon Impurity 30 (CAS CATO-C4X-262230)
- Ramelteon impurity 46 (CAS 1365920-11-1)
- Ramelteon Impurity 5 (CAS 880152-62-5)
- Ramelteon Impurity 63 (CAS CATO-C4X-262263)
- Ramelteon Impurity 64 (CAS 1252018-55-5)
- Ramelteon Impurity 65 (CAS 2819252-94-1)
- Ramelteon Impurity N13 (CAS 882434-87-9)
- Ramelteon (CAS 196597-26-9)
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- 1380572-33-7 5-Chloro-3-(3,4,5-trimethoxy-phenylimino)-1,3-dihydro-indol-2-one (CAS 1380572-33-7)
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