Ethyl 4-bromo-5-methylthiophene-2-carboxylate CAS 1256286-44-8
| CAS No. | 1256286-44-8 |
| Molecular Formula | C8H9BrO2S |
| Molecular Weight | 249.12 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO manufactures Ethyl 4-bromo-5-methylthiophene-2-carboxylate under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
CATO supplies Ethyl 4-bromo-5-methylthiophene-2-carboxylate (CAS 1256286-44-8), a certified reference material (molecular formula C8H9BrO2S, MW 249.12 g/mol) for analytical method development and quality control.
Ethyl 4-bromo-5-methylthiophene-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.
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.) | 1990 |
| Halogen Content | Br-containing |
| Sulfur Atoms | 1 |
Related Ethyl Standards
- Ethyl 2-bromo-2-(thiophen-2-yl)acetate (CAS 104688-01-9)
- Methyl 4-bromo-5-ethylthiophene-2-carboxylate (CAS 1047645-89-5)
- 5-bromo-7-fluoro-tetralin-1-one (CAS 1260018-37-8)
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- 1-Bromo-2-(ethanesulfonyl)benzene (CAS 1299474-17-1)
- 5-Bromo-2,4-dimethoxybenzenethiol (CAS 1303890-61-0)
- Ethyl 2-bromo-5-methylthiophene-3-carboxylate (CAS 1374676-14-8)
- 5-Bromo-2-methyl-thiophene-3-carboxylic acid ethyl ester (CAS 1824068-41-8)
Recommended Standards
- 3-(3-Bromothiophen-2-yl)-2-methylpropanoic acid (CAS 1249752-78-0)
- Methyl 4-Azidotetrafluorobenzoate (CAS 122590-75-4)
- 2-(Ethylamino)pyrimidine-5-boronic acid pinacol ester, 97% (CAS 1218791-44-6)
- N,N-Dimethyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyrazin-2-amine (CAS 1186041-96-2)
- 4-Chloro-2,6-bis(trifluoromethyl)pyrimidine (CAS 779-86-2)
- 4-Iodo-6-methyl-2-(methylsulfonyl)pyrimidine (CAS 591248-68-9)
- 2-(2-Bromo-5-fluorophenyl)ethanamine (CAS 771573-14-9)
- Ethyl (E)-3-(3-acetamido-6-chloro-2-fluorophenyl)acrylate (CAS 1379666-57-5)
- 6-Aminopyridine-2-carboximidamide dihydrochloride (CAS 1432679-10-1)
- 1-(4-Hydroxyphenyl)-2-(oxetan-3-ylthio)ethan-1-one (CAS 1427455-64-8)
- (S)-2-Amino-2-(3,5-difluorophenyl)acetic acid (CAS 1241678-32-9)
- 1-(2-(Bromomethyl)pyrrolidin-1-yl)ethan-1-one (CAS 1353954-90-1)
- 5-Chloro-1-phenyl-1H-imidazole (CAS 104672-26-6)
- Semaglutide impurity 72 (CAS CATO-C4X-222672)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com