Ramelteon Impurity 19 CAS CATO-C4X-262219
| CAS No. | CATO-C4X-262219 |
| Molecular Formula | C26H33NO2 |
| Molecular Weight | 391.55 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies Ramelteon Impurity 19 (CAS CATO-C4X-262219), a pharmacopoeial impurity reference standard (molecular formula C26H33NO2, MW 391.55 g/mol) used for the identification and quantification of trace impurities in APIs.
The molecular framework of Ramelteon Impurity 19 (C26H33NO2) is characterized by a steroid core, an amide group, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by its high hydrophobicity (logP), which provides a practical basis for HPLC-UV/DAD or LC-MS method development. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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.
As a certified reference material (CRM), Ramelteon Impurity 19 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 | C26H33NO2 |
| Molecular Weight | 391.55 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) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 1 |
Related Ramelteon Standards
- Ramelteon Impurity 29 (CAS CATO-C4X-262229)
- Ramelteon Impurity 8 (CAS CATO-C4X-26228)
- Ramelteon Dimer Impurity (CAS 1365920-38-2)
- Ramelteon Impurity 39 (CAS CATO-C4X-262239)
- Ramelteon RC 7 (CAS 196597-85-0)
- Ramelteon Imputiry 16 (CAS 196597-76-9)
- Ramelteon Impurity 4 (CAS CATO-C4X-26224)
- Ramelteon RC 8 (CAS 1246820-32-5)
Recommended Standards
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- Abiraterone Impurity 14 (CAS 2484719-10-8)
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Why CATO?
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