3,4-Dibromothiophene-2-carboxylic acid CAS 7311-66-2
| CAS No. | 7311-66-2 |
| Molecular Formula | C5H2Br2O2S |
| Molecular Weight | 285.94 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies 3,4-Dibromothiophene-2-carboxylic acid (CAS 7311-66-2), a certified reference material (molecular formula C5H2Br2O2S, MW 285.94 g/mol) for analytical method development and quality control.
The molecular framework of 3,4-Dibromothiophene-2-carboxylic acid (C5H2Br2O2S) is characterized by a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, bromine substitution. In reversed-phase chromatography, its retention is governed primarily by the polarity and ionization state of its functional groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. 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).
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
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 | C5H2Br2O2S |
| Molecular Weight | 285.94 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 Dibromothiophene Standards
- 4,5-Dibromothiophene-3-carboxylic acid (CAS 101079-66-7)
- 2,5-Dibromothiophene-3-carboxylic acid (CAS 7311-70-8)
- 3,5-Dibromothiophene-2-carboxylic acid (CAS 7311-68-4)
- 4,5-Dibromothiophene-2-carboxylic Acid (CAS 6324-10-3)
- 4,5-Dibromothiophene-2-carboxamide (CAS 171851-27-7)
- 2,5-Dibromothiophene-3-carboxamide (CAS 857979-62-5)
- 4,5-Dibromothiophene-3-carboxamide (CAS 98136-28-8)
- 2-Acetyl-4,5-dibromothiophene (CAS 7209-12-3)
Recommended Standards
- 2,2'-[(1-Methyl-1,3-propanediyl)bis(oxy)]bis[4-methyl-1,3,2-dioxaborinane] (CAS 2665-13-6)
- 2,4-Dibromothiazole-5-carboxamide (CAS 1239506-44-5)
- 5-Bromo-1,3-dichloro-2-(methoxymethoxy)benzene (CAS 1300743-46-7)
- 2,5-Dibromothiazole-4-carboxamide (CAS 1204296-20-7)
- 1-(3-Chlorofuran-2-yl)ethanone (CAS 67171-00-0)
- (E)-N,N-Dimethyl-N'-[7-(thiophen-2-yl)-[1,2,4]triazolo[1,5-a]pyrimidin-2-yl]methanimidamide (CAS 303145-94-0)
- 2-((2-Oxo-2-(thiophen-2-yl)ethyl)thio)-4,6-di(thiophen-2-yl)nicotinonitrile (CAS 339163-65-4)
- 4-(Naphthalen-2-yl)thiazole (CAS 96461-06-2)
- 5-(tert-Butylthio)-2-methoxy-4-methylpyridine (CAS 1355207-23-6)
- 2,4-D-Iso-Propanol Amine Salt (CAS CATO-CCEM500216)
- 2-Chloro-4-fluoro-3-methoxybenzaldehyde (CAS 750586-10-8)
- N-(2-Furylcarbonyl)-3-(1H-pyrrol-1-yl)-1-benzofuran-2-carbohydrazide (CAS 866040-19-9)
- piperidine-3,4-dicarboxylic acid hydrochloride (CAS 1461706-33-1)
- Semaglutide Impurity 5 (CAS 23406-82-8)
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