5-Bromo-2-thiophenecarboxylic Acid CAS 7311-63-9
| CAS No. | 7311-63-9 |
| Molecular Formula | C5H3BrO2S |
| Molecular Weight | 207.05 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 5-Bromo-2-thiophenecarboxylic Acid.
5-Bromo-2-thiophenecarboxylic Acid (CAS 7311-63-9), molecular formula C5H3BrO2S and molecular weight 207.05 g/mol, is a CATO reference standard with documented purity and traceability.
5-Bromo-2-thiophenecarboxylic Acid (C5H3BrO2S) contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, bromine substitution. Halogen substitution raises its density and boiling point, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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 | C5H3BrO2S |
| Molecular Weight | 207.05 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) | 4.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1959 |
| Halogen Content | Br-containing |
| Sulfur Atoms | 1 |
Related Bromo Standards
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Recommended Standards
- 4-Bromothiazole-2-carboxamide (CAS 912639-91-9)
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- 4,5-Dichloroveratrole (CAS 2772-46-5)
- Tadalafil Impurity 163 (CAS CATO-C4X-1087163)
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- 3-Benzyl-1H-pyrazole-5-carboxylic acid (CAS 595610-51-8)
- (1R,2S,5S)-bicyclo[3.1.0]Hexan-2-ol (CAS 1932202-31-7)
- 1-(6,7,8,9-Tetrahydro-5h-[1,2,4]triazolo[4,3-a]azepin-3-yl)ethan-1-amine (CAS 923232-49-9)
- 2-(4-Bromo-1H-pyrazol-1-yl)-5-nitropyridine (CAS 77556-30-0)
- (R)-2-(Pyridin-4-ylmethyl)piperazine (CAS 1217441-90-1)
- Febuxostat Impurity 48 (CAS 144060-52-6)
- Ethyl 5-amino-2,4-dimethylbenzoate (CAS 791722-05-9)
- Methyl (2s)-2-amino-3-(2,4-difluorophenyl)propanoate hydrochloride (CAS 2416218-96-5)
- D-γ-Glu20-Side-Tirzepatide (CAS CATO-CPTD788929)
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