Arbidol Impurity 43 CAS 40945-69-5
| CAS No. | 40945-69-5 |
| Molecular Formula | C15H16BrNO4 |
| Molecular Weight | 354.20 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Structurally, Arbidol Impurity 43 (C15H16BrNO4) contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage, bromine substitution. The molecule exhibits a degree of unsaturation (DBE) of 8.0, corresponding to approximately 8 ring(s) or double-bond equivalent(s). With a molecular weight of 354.20 g/mol, it falls into the moderately-high-molecular-weight range. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
Arbidol Impurity 43 (CAS 40945-69-5) is a certified pharmaceutical impurity reference standard with the molecular formula C15H16BrNO4 and a molecular weight of 354.20 g/mol.
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), Arbidol Impurity 43 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 | C15H16BrNO4 |
| Molecular Weight | 354.20 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1968 |
| Halogen Content | Br-containing |
| Nitrogen Atoms | 1 |
Related Arbidol Standards
- Arbidol Impurity 14 (CAS CATO-C4X-112914)
- Arbidol Impurity 82 (CAS 10588-31-5)
- Arbidol Impurity 55 (CAS CATO-C4X-112955)
- Arbidol Impurity 39 (CAS CATO-C4X-112939)
- Arbidol Impurity 17 (CAS CATO-C4X-112917)
- Arbidol Impurity 29 (CAS CATO-C4X-112929)
- Arbidol Impurity 40 (CAS 1106670-97-6)
- Arbidol Impurity 15 (CAS CATO-C4X-112915)
Recommended Standards
- 2-(2,4-Dichlorobenzamido)-4-(methylsulfonyl)butanoic acid (CAS 1025058-91-6)
- tert-Butyl 6-bromo-3-(methylcarbamoyl)-1H-indazole-1-carboxylate (CAS 2413120-59-7)
- 2,4-Dichloro-N-(5-(thiophen-2-ylmethyl)-1,3,4-oxadiazol-2-yl)benzamide (CAS 1040666-45-2)
- tert-Butyl 5-acetamido-3-bromo-1H-pyrrolo[2,3-c]pyridine-1-carboxylate (CAS 2368945-95-1)
- Relugolix Impurity 103 (CAS CATO-C4X-2429103)
- Epinastine Impurity N7 (CAS 21535-43-3)
- Osimertinib Impurity 95 (CAS CATO-C4X-204595)
- 4-(1-Methyl-1H-indazol-3-yl)-4H-1,2,4-triazol-3-ol (CAS 1440535-43-2)
- 1-(2-Methyl-6-(phenylamino)pyridin-3-yl)ethan-1-ol (CAS 1355237-83-0)
- 1-Methyladamantane (CAS 768-91-2)
- 2-Chloro-6-iodo-4-(trifluoromethoxy)aniline (CAS 1805237-24-4)
- Pyrimidine-5-carboximidamide (CAS 690619-43-3)
- 1-(3-bromo-1-methyl-1H-pyrazol-5-yl)-2-(morpholin-4-yl)ethan-1-ol (CAS 2145694-89-7)
- Neuropeptide S (human) (CAS 412938-67-1)
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