2,4-Dibromo-1-ethylbenzene CAS 66634-86-4
| CAS No. | 66634-86-4 |
| Molecular Formula | C8H8Br2 |
| Molecular Weight | 263.96 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 263.96 g/mol gives 2,4-Dibromo-1-ethylbenzene distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
2,4-Dibromo-1-ethylbenzene (CAS 66634-86-4), molecular formula C8H8Br2 and molecular weight 263.96 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to bromine substitution, an aromatic ring system, 2,4-Dibromo-1-ethylbenzene is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 263.96 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
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 | C8H8Br2 |
| Molecular Weight | 263.96 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | 97%+ |
| Storage | Store at room temperature, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO |
| Stability | May oxidize slowly on prolonged air exposure |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1976 |
| Halogen Content | Br-containing |
Related Dibromo Standards
- 2,5-Dibromo-m-xylene (CAS 100189-84-2)
- 4,5-Dibromo-m-xylene (CAS 116668-61-2)
- 1,2-Dibromo-4-ethylbenzene (CAS 134940-69-5)
- 1,2-Dibromo-3,4-dimethylbenzene (CAS 24932-49-8)
- 1,3-Dibromo-2,4-dimethylbenzene (CAS 90434-19-8)
- 1,3-Dibromo-2,5-dimethylbenzene (CAS 66788-13-4)
- 1,3-DIBROMO-2-ETHYLBENZENE (CAS 41053-30-9)
- 1,4-Dibromo-2-ethylbenzene (CAS 289039-53-8)
Recommended Standards
- 1-Bromo-4-(bromomethyl)-2-methylbenzene (CAS 27561-51-9)
- 2,4-Dibromo-1-ethyl-benzene (CAS 30812-87-4)
- 1-Bromo-4-(1-bromoethyl)benzene (CAS 24308-78-9)
- 2-Bromo-1-(bromomethyl)-4-methylbenzene (CAS 75366-14-2)
- 2-(6-chloro-3-pyridinyl)-1-hexyl-5-(trifluoromethyl)-1H-1,3-benzimidazole 400074-13-7 KS-00002XL3 (CAS 400074-13-7)
- 6-Amino-5-chloropyridine-3-sulfonic acid (CAS 610275-89-3)
- 1-Methyl-3-((methylamino)methyl)-1H-pyrazole-5-carbonitrile hydrochloride (CAS 1643141-20-1)
- 3-(3-(Tert-butyl)phenoxy)propan-1-amine (CAS 116735-68-3)
- 1-Cyclopentyl-5-nitro-1H-pyrazole (CAS 1170836-25-5)
- 3-Chlorobenzylmagnesium chloride, 0.50 M in 2-MeTHF (CAS 29874-01-9)
- 1-(1-(Aminomethyl)cyclopentyl)butan-1-ol (CAS 1511468-59-9)
- (4-Bromo-phenyl)-oxo-acetaldehydeoxime (CAS 49615-87-4)
- 1-Butyl-5-methyl-4,5-dihydro-1H-imidazol-2-amine (CAS 735210-75-0)
- Semaglutide Impurity 165 (CAS CATO-C4X-2226165)
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