Almotriptan Impurity 3 CAS 334981-13-4
| CAS No. | 334981-13-4 |
| Molecular Formula | C17H25N3O3S |
| Molecular Weight | 351.46 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
As a process- or degradation-related impurity, Almotriptan Impurity 3 (CAS 334981-13-4, C17H25N3O3S) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Structurally, Almotriptan Impurity 3 (C17H25N3O3S) contains a steroid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 7.0, corresponding to approximately 7 ring(s) or double-bond equivalent(s). With a molecular weight of 351.46 g/mol, it falls into the moderately-high-molecular-weight range. 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).
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.
Physical & Chemical Properties
| Molecular Formula | C17H25N3O3S |
| Molecular Weight | 351.46 g/mol |
| Purity | 97%+ |
| 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) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
Related Almotriptan Standards
- Almotriptan EP Impurity E (CAS 603137-43-5)
- Almotriptan Impurity 13 (CAS CATO-C4X-153813)
- Almotriptan Impurity 6 (CAS CATO-C4X-15386)
- Almotriptan Impurity 9 (CAS CATO-C4X-15389)
- Almotriptan EP Impurity C (CAS 1018676-02-2)
- Almotriptan Impurity 8 (CAS CATO-C4X-15388)
- Almotriptan (CAS 154323-57-6)
- Almotriptan Impurity 1 (CAS CATO-C4X-15381)
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