3-Bromo-5-fluorobenzo[b]thiophene CAS 138993-21-2
| CAS No. | 138993-21-2 |
| Molecular Formula | C8H4BrFS |
| Molecular Weight | 231.08 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Owing to sulfur-containing functionality, fluorine/bromine substitution, an aromatic ring system, 3-Bromo-5-fluorobenzo[b]thiophene is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 231.08 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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).
3-Bromo-5-fluorobenzo[b]thiophene (CAS 138993-21-2) is a high-purity analytical reference standard with the molecular formula C8H4BrFS and a molecular weight of 231.08 g/mol.
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 | C8H4BrFS |
| Molecular Weight | 231.08 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1996 |
| Halogen Content | F/Br-containing |
| Sulfur Atoms | 1 |
Related Bromo Standards
- 6-Bromo-5-fluorobenzo[b]thiophene (CAS 1404119-50-1)
- 6-bromo-7-fluoro-benzothiophene (CAS 1427437-51-1)
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- 4-bromo-5-fluoro-1-benzothiophene (CAS 826995-66-8)
- 4-Bromo-7-fluorobenzo[b]thiophene (CAS 360576-07-4)
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- (R)-2-Bromo-1-(3-methoxyphenyl)ethan-1-ol (CAS 100306-27-2)
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- [(2-Chloro-6-fluorophenyl)methyl](2-methylpropyl)amine (CAS 869945-17-5)
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