N-Nitroso Cyproheptadine impurity 17 CAS 3979-11-1
| CAS No. | 3979-11-1 |
| Molecular Formula | C20H18N2O |
| Molecular Weight | 302.37 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Based on its molecular formula C20H18N2O, N-Nitroso Cyproheptadine impurity 17 contains a steroid core, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 302.37 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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 process- or degradation-related impurity, N-Nitroso Cyproheptadine impurity 17 (CAS 3979-11-1, C20H18N2O) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
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 | C20H18N2O |
| Molecular Weight | 302.37 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 13.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1958 |
| Nitrogen Atoms | 2 |
Related N Standards
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Recommended Standards
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- 4-(2-Methyl-1,3-dithiolan-2-yl)phenyl 4-chlorobenzenesulfonate (CAS 331460-99-2)
- N-(5-Amino-2-fluorophenyl)-2-[2-(tert-butyl)-phenoxy]acetamide (CAS 1020053-99-9)
- (2-Chloro-benzyl)-(3-morpholin-4-yl-propyl)-amine 107922-87-2 N-(2-chlorobenzyl)-3-morpholinopropan-1-amine (CAS 107922-87-2)
- 6-Chloro-5-iodopyrimidine-2,4-diamine (CAS 1186093-86-6)
- Semaglutide impurity 99 (CAS CATO-C4X-222699)
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