3-Bromo-4-ethylthiophene CAS 83663-39-2
| CAS No. | 83663-39-2 |
| Molecular Formula | C6H7BrS |
| Molecular Weight | 191.09 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including 3-Bromo-4-ethylthiophene.
3-Bromo-4-ethylthiophene (CAS 83663-39-2), molecular formula C6H7BrS and molecular weight 191.09 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C6H7BrS, 3-Bromo-4-ethylthiophene contains sulfur-containing functionality, bromine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 191.09 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 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 | 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)
- 4-Bromo-2-ethylthiophene (CAS 83663-40-5)
- 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
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- 3-(2-Bromoethyl)thiophene (CAS 57070-76-5)
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