Arbidol Impurity 11 CAS 958450-23-2
| CAS No. | 958450-23-2 |
| Molecular Formula | C22H23BrN2O3S |
| Molecular Weight | 475.40 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a process- or degradation-related impurity, Arbidol Impurity 11 (CAS 958450-23-2, C22H23BrN2O3S) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Based on its molecular formula C22H23BrN2O3S, Arbidol Impurity 11 contains a steroid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage, bromine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 475.40 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).
Recommended for quantitative analysis by HPLC, GC, LC-MS/MS, or GC-MS as an external calibration standard; it can also be used for spiked-recovery experiments, LOD/LOQ determination, and LC-MS/MS multiple-reaction-monitoring (MRM) calibration.
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 | C22H23BrN2O3S |
| Molecular Weight | 475.40 g/mol |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1987 |
| Halogen Content | Br-containing |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Arbidol Standards
- Arbidol Impurity 48 (CAS CATO-C4X-112948)
- Arbidol (CAS 131707-25-0)
- Arbidol Impurity 30 (CAS CATO-C4X-112930)
- Arbidol Impurity 23 (CAS CATO-C4X-112923)
- Arbidol Impurity 37 (CAS CATO-C4X-112937)
- Arbidol Impurity 4 (CAS 1130901-04-0)
- Arbidol Impurity 54 (CAS CATO-C4X-112954)
- Arbidol Impurity 58 (CAS CATO-C4X-112958)
Recommended Standards
- N-(3,5-bis(trifluoromethyl)phenyl)-3-((4-methoxybenzyl)oxy)thiophene-2-carboxamide (CAS 339098-42-9)
- tert-Butyl 3-((1-(2,4-dichlorobenzyl)-1H-benzo[d]imidazol-2-yl)amino)piperidine-1-carboxylate (CAS 1420975-44-5)
- Ethyl(2S,3S)-3-(4-bromothiazol-2-yl)-2-(dibenzylamino)-3-hydroxypropanoate (CAS 2641452-14-2)
- N-(3,5-Bis(trifluoromethyl)phenyl)-2-((4-ethyl-5-(pyridin-2-yl)-4H-1,2,4-triazol-3-yl)thio)acetamide (CAS 618415-07-9)
- Piribedil Impurity N4 (CAS 55436-41-4)
- Haloperidol EP Impurity F (CAS 1391052-67-7)
- Regorafenib Impurity 74 (CAS CATO-C4X-104774)
- 2-Methyltetrahydrofuran-3-ol (CAS 29848-44-0)
- 6,8-Difluoro-3,4-dihydro-2h-1-benzopyran-4-ol (CAS 1270583-11-3)
- 5-(4-Chlorophenyl)-1-[2-(propan-2-yl)phenyl]-1h-imidazole-2-thiol (CAS 793678-95-2)
- Benzyl(2,2,2-trifluoroethyl)sulfane (CAS 77745-03-0)
- 2-Ethoxy-5-methoxyaniline (CAS 102439-33-8)
- 6-Cyclobutoxy-4-methylpyridin-3-amine (CAS 1522335-03-0)
- Semaglutide Impurity 121 X Sodium Salt (CAS CATO-C4X-2226121)
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