N-Nitroso Ebastine EP Impurity C CAS CATO-C4X-202923
| CAS No. | CATO-C4X-202923 |
| Molecular Formula | C18H20N2O2 |
| Molecular Weight | 296.36 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.
CATO supplies N-Nitroso Ebastine EP Impurity C (CAS CATO-C4X-202923), a pharmacopoeial impurity reference standard (molecular formula C18H20N2O2, MW 296.36 g/mol) used for the identification and quantification of trace impurities in APIs.
N-Nitroso Ebastine EP Impurity C (C18H20N2O2) contains a steroid core, an amide group, a hydroxyl group, an ether linkage. It is notably hygroscopic, 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), N-Nitroso Ebastine EP Impurity C 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 | C18H20N2O2 |
| Molecular Weight | 296.36 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | ≥95% |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 2 |
Related N Standards
- N-Nitroso Metoprolol (CAS 138768-62-4)
- N-Nitroso Fexofenadine EP Impurity E (CAS 1038-06-8)
- N-Nitroso Voglibose (CAS CATO-C4X-178017)
- N-Nitroso-Voglibose (CAS CATO-C4X-178020)
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- N-Nitroso Fentanyl EP Impurity J (CAS 1184873-13-9)
- N-Nitroso Ranolazine Impurity 16 (CAS CATO-C4X-102616)
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Recommended Standards
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- Ketoprofen EP Impurity L (Mixture of Enantiomer) (CAS 1797984-80-5)
- Dasatinib Impurity N57 (CAS 1245157-42-9)
- Dotinurad Impurity 140 (CAS CATO-C4X-2494140)
- Fingolimod Impurity 15 (CAS 374077-88-0)
- 1-(Difluoromethyl)-5-(1H-imidazol-5-yl)-1H-1,2,4-triazole (CAS 2845318-36-5)
- 1-(2-((3-Iodoprop-2-yn-1-yl)oxy)ethoxy)butane (CAS 89635-85-8)
- 2-(1-Benzamidocyclobutyl)acetic acid (CAS 42336-37-8)
- Rocuronium Impurity 35 (CAS CATO-C4X-124235)
- (R)-1-(2-Aminoethyl)-4-methylpyrrolidin-2-one (CAS 2377182-15-3)
- 8-(2,2,2-Trifluoroethyl)-1,4-dioxa-8-azaspiro[4.5]Decane (CAS 710350-66-6)
- Tirzepatide Impurity 15 (CAS CATO-C4X-324015)
Why CATO?
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