1,2-Dibromo-4-ethylbenzene CAS 134940-69-5
| CAS No. | 134940-69-5 |
| 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 1,2-Dibromo-4-ethylbenzene distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
CATO supplies 1,2-Dibromo-4-ethylbenzene (CAS 134940-69-5), a certified reference material (molecular formula C8H8Br2, MW 263.96 g/mol) for analytical method development and quality control.
Owing to bromine substitution, an aromatic ring system, 1,2-Dibromo-4-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. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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.) | 1995 |
| 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-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)
- 1,5-Dibromo-2,3-dimethylbenzene (CAS 51209-82-6)
Recommended Standards
- (4-(Methoxycarbonyl)-3-(trifluoromethoxy)phenyl)boronic acid (CAS 1242145-45-4)
- 4-Bromo-2-methylbenzyl Bromide (CAS 156001-49-9)
- (2-(Methoxycarbonyl)-5-(trifluoromethoxy)phenyl)boronic acid (CAS 1217500-75-8)
- (-)-1-Bromo-4-(1-bromoethyl)benzene (CAS 159755-11-0)
- 1-methyl-4-(5-methyl-1,3-oxazol-2-yl)-1H-pyrazol-5-amine (CAS 1803610-40-3)
- 3-Ethoxy-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzaldehyde (CAS 887921-58-6)
- 6-(4-Ethoxyphenyl)-5-methylpyrimidin-4-ol (CAS 1256778-74-1)
- (3-Amino-2-methyl-phenyl)-carbamic acid tert-butyl ester (CAS 179898-27-2)
- 2-[(Chloroacetyl)amino]benzamide (CAS 21721-78-8)
- 5-Chloro-3-(2,4-dichlorophenyl)-[1,2,4]triazolo[4,3-c]quinazoline (CAS 129177-22-6)
- 1-(3-(3,6-Dichloropyridazin-4-yl)bicyclo[1.1.1]Pentan-1-yl)ethan-1-one (CAS 2168139-66-8)
- ((4-Bromo-3-chloropyridin-2-yl)imino)dimethyl-l6-sulfanone (CAS 2920965-17-7)
- 1,7-Dimethyl-1H-indole (CAS 5621-16-9)
- 3X Flag Peptide trifluoroacetate salt (CAS 402750-12-3)
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