4-Bromo-2-ethylthiophene CAS 83663-40-5
| CAS No. | 83663-40-5 |
| Molecular Formula | C6H7BrS |
| Molecular Weight | 191.09 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 4-Bromo-2-ethylthiophene is closely related to sulfur-containing functionality, bromine substitution in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
4-Bromo-2-ethylthiophene (CAS 83663-40-5), molecular formula C6H7BrS and molecular weight 191.09 g/mol, is a CATO reference standard with documented purity and traceability.
The molecular framework of 4-Bromo-2-ethylthiophene (C6H7BrS) is characterized by sulfur-containing functionality, bromine substitution. In reversed-phase chromatography, its retention is governed primarily by the polarity and ionization state of its functional groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
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 | C6H7BrS |
| Molecular Weight | 191.09 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, 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) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1980 |
| Halogen Content | Br-containing |
| Sulfur Atoms | 1 |
Related Bromo Standards
- 5-Bromo-2,3-dimethylthiophene (CAS 172319-78-7)
- 2-Bromo-3-ethylthiophene (CAS 53119-61-2)
- 2-Bromo-5-ethylthiophene (CAS 62323-44-8)
- 3-Bromo-2,4-dimethylthiophene (CAS 79485-96-4)
- 3-Bromo-4-ethylthiophene (CAS 83663-39-2)
- 2-Bromo-3,4-dimethylthiophene (CAS 169328-87-4)
- 2-Bromo-2-methylcyclohexanone (CAS 10409-47-9)
- 2-Bromo-1-cyclohexene-1-methanol (CAS 117360-45-9)
Recommended Standards
- 4,5,6,7-Tetrafluoro-1H-benzo[d][1,2,3]triazole (CAS 26888-72-2)
- 5,5-Dimethyl-2-selenoxoimidazolidin-4-one (CAS 97462-48-1)
- 2-(2-Thienyl)ethyl Bromide (CAS 26478-16-0)
- 3-(Bromomethyl)-4-methylthiophene (CAS 856937-70-7)
- 2-(5-Methoxy-1H-indol-3-yl)acetohydrazide (CAS 57000-48-3)
- 2-[2-[2-Chloro-3-[2-(1,3-dihydro-1,3,3-trimethyl-2H-indol-2-ylidene)-ethylidene]-1-cyclopenten-1-yl]-ethenyl]-1,3,3-trimethyl-3H-indolium 4-methylbenzenesulfonate 193687-61-5 (CAS 193687-61-5)
- Methyl 6-formylbenzo[d][1,3]dioxole-5-carboxylate (CAS 119773-72-7)
- 2-(3-(Pyridin-3-yl)-5-(trifluoromethyl)pyridin-2-yl)acetic acid (CAS 1214378-50-3)
- Isopentadecanoic acid (CAS 50973-09-6)
- (3,6-Difluoro-2-(hexyloxy)phenyl)boronic acid (CAS 343628-19-3)
- 2-Chloro-[4,4'-bipyridine]-3-carbonitrile (CAS 1268104-62-6)
- 5-(Cyclopropylmethyl)-2-(dimethylamino)phenol (CAS 1243439-58-8)
- 2-(1-Methyl-1H-imidazol-4-yl)-1H-benzo[d]imidazole (CAS 54209-65-3)
- Semaglutide Impurity 5 (CAS 23406-82-8)
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