Ethyl 4-bromo-2-formylthiophene-3-carboxylate CAS 1433203-92-9
| CAS No. | 1433203-92-9 |
| Molecular Formula | C8H7BrO3S |
| Molecular Weight | 263.11 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
Ethyl 4-bromo-2-formylthiophene-3-carboxylate (CAS 1433203-92-9) is a high-purity analytical reference standard with the molecular formula C8H7BrO3S and a molecular weight of 263.11 g/mol.
Based on its molecular formula C8H7BrO3S, Ethyl 4-bromo-2-formylthiophene-3-carboxylate contains a sulfone group, 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 263.11 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).
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 | C8H7BrO3S |
| Molecular Weight | 263.11 g/mol |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), 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; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1991 |
| Halogen Content | Br-containing |
| Sulfur Atoms | 1 |
Related Ethyl Standards
- 6-Bromo-1-methyl-1,3-dihydrobenzo[c][1,2,5]thiadiazole 2,2-dioxide (CAS 1333262-65-9)
- 6-Bromo-3-hydroxy-2,3-dihydrobenzo[b]thiophene 1,1-dioxide (CAS 1346818-94-7)
- 5-Bromo-3-hydroxy-2,3-dihydrobenzothiophene 1,1-Dioxide (CAS 1428725-91-0)
- 2-Bromo-5,7-dihydro-4H-thieno[2,3-c]pyran-3-carboxylic acid (CAS 1594878-47-3)
- 6-bromo-2,3-dihydrobenzo[b][1,4]oxathiine 4,4-dioxide (CAS 1778631-83-6)
- 2-Bromo-7-fluoro-9H-fluorene (CAS 1806-21-9)
- 3-Bromo-4-(methylsulfonyl)benzaldehyde (CAS 254878-96-1)
- 3-Bromo-4-oxo-4-thiophen-2-yl-butyric acid (CAS 53515-21-2)
Recommended Standards
- 3-(Allyloxy)-4-bromothiophene-2-carboxylic acid (CAS 1707727-87-4)
- 4-Fluoro-2-(1,1,1,3,3,3-hexafluoropropan-2-yloxy)pyridine (CAS 1713163-18-8)
- Platinum hydroxide (CAS 12135-48-7)
- 5-Fluoro-2-(1,1,1,3,3,3-hexafluoropropan-2-yloxy)pyridine (CAS 1774896-93-3)
- 2-Oxo-1,2,3,4-tetrahydroquinoline-6-carbonitrile (CAS 159053-44-8)
- 2-(Diethylamino)benzo[d]thiazol-6-ol (CAS 75105-05-4)
- 8-Methyl-2-oxo-1,2,5,6,7,8-hexahydroquinoline-3-carboxylic acid (CAS 1250974-79-8)
- Menaquinone 6 (CAS 84-81-1)
- N-(2-Cyclopropyl-2-hydroxypropyl)-3-(phenylsulfonyl)propanamide (CAS 1351587-51-3)
- 1,2-Bis(maleimido)ethane (CAS 5132-30-9)
- tert-butyl-[rel-(1R,2R,4R)-2-fluoro-4-(iodomethyl)cyclopentoxy]-dimethyl-silane (CAS 1187636-14-1)
- (Azetidin-2-yl)methanamine hydrochloride (CAS 1187932-56-4)
- Perospirone Impurity 41 (CAS CATO-C4X-245841)
- D-Pro31-Tirzepatide (CAS CATO-CPTD788905)
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