5-Bromo-3-chlorothiophene-2-carboxylic acid CAS 842135-76-6
| CAS No. | 842135-76-6 |
| Molecular Formula | C5H2BrClO2S |
| Molecular Weight | 241.49 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
5-Bromo-3-chlorothiophene-2-carboxylic acid (CAS 842135-76-6), molecular formula C5H2BrClO2S and molecular weight 241.49 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, 5-Bromo-3-chlorothiophene-2-carboxylic acid (C5H2BrClO2S) contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine/bromine substitution. The molecule exhibits a degree of unsaturation (DBE) of 4.0, corresponding to approximately 4 ring(s) or double-bond equivalent(s). With a molecular weight of 241.49 g/mol, it falls into the medium-molecular-weight range. 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.
As a certified reference material (CRM), 5-Bromo-3-chlorothiophene-2-carboxylic acid meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C5H2BrClO2S |
| Molecular Weight | 241.49 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.) | 1987 |
| Halogen Content | Cl/Br-containing |
| Sulfur Atoms | 1 |
Related Bromo Standards
- 5-bromo-4-chloro-thiophene-2-carboxylic acid (CAS 123418-69-9)
- 2-Bromo-5-chlorothiophene-3-carboxylic acid (CAS 1379306-17-8)
- 4-Bromo-3-chlorothiophene-2-carboxylic acid (CAS 1401992-28-6)
- 3-Bromo-5-chlorothiophene-2-carboxylic acid (CAS 60729-38-6)
- 4-Bromo-5-chlorothiophene-2-carboxylic Acid (CAS 60729-37-5)
- 6-bromo-1-chloro-naphthalene (CAS 1000391-24-1)
- 4-Bromo-3-chloro-2-fluorothiophenol (CAS 1160574-65-1)
- 4-Bromo-2-chloro-6-fluorobenzenethiol (CAS 1208074-77-4)
Recommended Standards
- 2,2,2-Trichloro-1-(1,3-dimethyl-1H-pyrazol-4-yl)ethanone (CAS 1306738-48-6)
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- 2,2,2-Trichloro-1-(1,5-dimethyl-1H-pyrazol-4-yl)ethan-1-one (CAS 1306739-77-4)
- 2,4,5-Trichlorophenylethanediol (CAS 14299-53-7)
- Dichloro[1,2-di(methoxy-ÎșO)ethane]cobalt (CAS 18346-58-2)
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- Ethyl 3-amino-4-(cyclopentylamino)benzoate (CAS 885312-80-1)
- 2-(2-((3-Methylcyclohexyl)amino)ethoxy)ethan-1-ol (CAS 1024319-08-1)
- 4-Chloro-5-(difluoromethyl)-3-nitropyridine-2-sulfonamide (CAS 1805272-96-1)
- Methyl (2S,4S)-4-(2,4,5-trichlorophenoxy)-2-pyrrolidinecarboxylate hydrochloride (CAS 1354488-48-4)
- 5-Iodo-2-furaldehyde (CAS 2689-65-8)
- 3-Cyclopropoxythiophene-2-carbaldehyde (CAS 2314460-52-9)
- 1-(9-Anthracenylmethyl)piperazine (CAS 126257-22-5)
- Semaglutide Impurity 140 (CAS CATO-C4X-2226140)
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