(E)-Methyl 4-(4-bromophenyl)-2-oxobut-3-enoate CAS 608128-34-3
| CAS No. | 608128-34-3 |
| Molecular Formula | C11H9BrO3 |
| Molecular Weight | 269.09 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
(E)-Methyl 4-(4-bromophenyl)-2-oxobut-3-enoate (CAS 608128-34-3), molecular formula C11H9BrO3 and molecular weight 269.09 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C11H9BrO3, (E)-Methyl 4-(4-bromophenyl)-2-oxobut-3-enoate contains a carboxylic acid group, a hydroxyl group, an ether linkage, bromine substitution, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 269.09 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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.
CATO manufactures (E)-Methyl 4-(4-bromophenyl)-2-oxobut-3-enoate 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.
Physical & Chemical Properties
| Molecular Formula | C11H9BrO3 |
| Molecular Weight | 269.09 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1985 |
| Halogen Content | Br-containing |
Recommended Standards
- (E)-4-(4-Bromophenyl)-3-methyl-4-oxobut-2-enoic acid (CAS 35504-94-0)
- 1-(4-Bromobenzyl)imidazolidine-2,4-dione (CAS 201987-81-7)
- (6-Bromo-8-methoxyquinazolin-2-yl)methanol (CAS 2721374-66-7)
- 1-(4-bromophenyl)hexahydropyrimidine-2,4-dione (CAS 90772-28-4)
- 3-Chloro-8-methyl-8-azabicyclo[3.2.1]Octane (CAS 51275-31-1)
- 2-Amino-4-phenoxyphenol (CAS 1607-51-8)
- 5-Bromo-3-(trifluoromethyl)benzisoxazole (CAS 1260790-58-6)
- 5-((Trimethylsilyl)ethynyl)-1H-pyrrolo[2,3-b]pyridine (CAS 1207351-09-4)
- Methyl 2-((2-cyano-3-fluorophenyl)thio)acetate (CAS 262433-37-4)
- trans-2-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)styrene beta-styrylboronic acid pinacol ester trans-styrylboronic acid, pinacol ester trans-2-phenylvinylboronic acid pinacol ester trans-beta-styrylboronic acid pinacol ester (E)-Phenylethenylboronic acid, pinacol ester (E)-4,4,5,5-Tetramethyl-2-(2-phenylvinyl)-1,3,2-dioxaborolane 83947-56-2 (CAS 83947-56-2)
- 2-Amino-3,9-dihydro-4H-indeno[2,1-d]pyrimidin-4-one (CAS 1126602-49-0)
- 3-(2-Methoxyphenyl)furan (CAS 259266-91-6)
- Ethyl 5-bromobenzo(d)isothiazole-3-carboxylate (CAS 936923-58-9)
- Semaglutide impurity 75 (CAS CATO-C4X-222675)
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