5-bromo-2,3-dihydro-1$l^{6}-benzothiophene-1,1-dione CAS 64260-76-0
| CAS No. | 64260-76-0 |
| Molecular Formula | C8H7BrO2S |
| Molecular Weight | 247.11 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
5-bromo-2,3-dihydro-1$l^{6}-benzothiophene-1,1-dione (CAS 64260-76-0), molecular formula C8H7BrO2S and molecular weight 247.11 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, bromine substitution, an aromatic ring system, 5-bromo-2,3-dihydro-1$l^{6}-benzothiophene-1,1-dione is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 247.11 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).
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 | C8H7BrO2S |
| Molecular Weight | 247.11 g/mol |
| Purity | 97%+ |
| Storage | Store at room temperature, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1975 |
| Halogen Content | Br-containing |
| Sulfur Atoms | 1 |
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Recommended Standards
- 5-Bromo-2-(methylsulfanyl)benzoic acid (CAS 62176-40-3)
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- 5-Bromo-4-cyclopropylthiophene-2-carboxylic acid (CAS 2231413-55-9)
- L-Valine, N-[(2S)-2-amino-1-oxobutyl]- (CAS 1814938-33-4)
- Ochratoxin B (CAS 4825-86-9)
- 6,7-Dihydro-5H-cyclopenta[d]pyrimidine-2,4-diamine (CAS 1899-39-4)
- (S)-6-((4-Fluorobenzyl)oxy)-2-nitro-6,7-dihydro-5H-imidazo[2,1-b][1,3]oxazine (CAS 187235-33-2)
- Amlexanox Impurity 1 (CAS CATO-C4X-21761)
- (1,4,7,10-Tetraoxacyclododecan-2-yl)methanol (CAS 75507-26-5)
- 3-Methyl-6-(1-phenylethyl)-2H-pyrazolo[4,3-d]pyrimidin-7(6H)-one (CAS 86927-77-7)
- 2-(Azetidin-3-yl)-4-fluoropyridine (CAS 1613444-30-6)
- 2-(4-Chlorophenyl)-4-oxo-4-phenylbutanenitrile (CAS 95855-32-6)
- Tau Peptide (245-274) (Repeat 1 Domain) trifluoroacetate salt (CAS 1428134-39-7)
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