Methyl 4-bromo-3,5-dimethylthiophene-2-carboxylate CAS 928044-46-6
| CAS No. | 928044-46-6 |
| Molecular Formula | C8H9BrO2S |
| Molecular Weight | 249.12 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies Methyl 4-bromo-3,5-dimethylthiophene-2-carboxylate (CAS 928044-46-6), a certified reference material (molecular formula C8H9BrO2S, MW 249.12 g/mol) for analytical method development and quality control.
Methyl 4-bromo-3,5-dimethylthiophene-2-carboxylate (C8H9BrO2S) contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, bromine substitution, an aromatic ring system. 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).
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 | C8H9BrO2S |
| Molecular Weight | 249.12 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 |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1987 |
| Halogen Content | Br-containing |
| Sulfur Atoms | 1 |
Related Methyl Standards
- Ethyl 2-bromo-2-(thiophen-2-yl)acetate (CAS 104688-01-9)
- Methyl 4-bromo-5-ethylthiophene-2-carboxylate (CAS 1047645-89-5)
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Recommended Standards
- Methyl 4-bromo-2,5-dimethylthiophene-3-carboxylate (CAS 859489-84-2)
- Promurit (CAS 5836-73-7)
- Ethyl 5-bromo-3-methylthiophene-2-carboxylate (CAS 909010-86-2)
- 4-(4-Bromothiazol-2-yl)morpholine (CAS 1017781-60-0)
- (2,6-Difluorophenyl)(oxazol-2-yl)methanone (CAS 898760-44-6)
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- 90989-93-8 [2-acetyloxy-3-[2-aminoethoxy(hydroxy)phosphoryl]oxypropyl] acetate (CAS 90989-93-8)
- 8-Bromo-N-methyl-1H-purin-6-amine (CAS 89073-89-2)
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- 6-Fluoro-1H-pyrrolo[3,2-c]pyridine-3-carbonitrile (CAS 2231676-02-9)
- D-Tyr10-Tirzepatide (CAS CATO-CPTD788922)
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