Methyl 5-bromo-4-ethoxythiophene-3-carboxylate CAS 1823366-93-3
| CAS No. | 1823366-93-3 |
| Molecular Formula | C8H9BrO3S |
| Molecular Weight | 265.12 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Methyl 5-bromo-4-ethoxythiophene-3-carboxylate (CAS 1823366-93-3) is a high-purity analytical reference standard with the molecular formula C8H9BrO3S and a molecular weight of 265.12 g/mol.
Structurally, Methyl 5-bromo-4-ethoxythiophene-3-carboxylate (C8H9BrO3S) contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, bromine substitution, an aromatic ring system. The molecule exhibits a degree of unsaturation (DBE) of 4.0, corresponding to approximately 4 ring(s) or double-bond equivalent(s). With a molecular weight of 265.12 g/mol, it falls into the medium-molecular-weight range. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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.
As a certified reference material (CRM), Methyl 5-bromo-4-ethoxythiophene-3-carboxylate meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C8H9BrO3S |
| Molecular Weight | 265.12 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) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1995 |
| Halogen Content | Br-containing |
| Sulfur Atoms | 1 |
Related Methyl Standards
- 4-Bromo-2-methoxy-1-(methylsulfonyl)benzene (CAS 1095544-87-8)
- Methyl 4-bromo-3-methoxy-5-methyl-2-thiophenecarboxylate (CAS 123342-03-0)
- (3-Bromo-5-(methylsulfonyl)phenyl)methanol (CAS 1338796-07-8)
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Recommended Standards
- 1-Bromo-3-(4-fluorobenzyl)benzene (CAS 181207-67-0)
- Ethyl 5-bromo-4-methoxythiophene-3-carboxylate (CAS 1823882-59-2)
- 4-(Aminomethyl)-3-chloro-2-cyanobenzene-1-sulfonyl chloride (CAS 1807083-60-8)
- 4-Bromo-1-(2-fluoroethyl)-5-(propoxymethyl)-1H-pyrazole (CAS 1856048-00-4)
- methyl 3-(tert-butoxycarbonylamino)thiophene-2-carboxylate (CAS 149587-72-4)
- 1-(4-Ethylphenoxy)-3-(4-phenylpiperazin-1-yl)propan-2-ol dihydrochloride (CAS 352460-41-4)
- Sodium Fluoride (CAS 7681-49-4)
- 4,4-Difluoro-2,3-Dimethoxy-2-Cyclobuten-1-One (CAS 60376-35-4)
- 4-Bromo-2-(2-nitrovinyl)thiophene (CAS 28783-35-9)
- 2-Amino-N-ethyl-N-((1-methylpiperidin-2-yl)methyl)acetamide (CAS 1353952-53-0)
- 3-(3-Fluorophenyl)cyclopentan-1-one (CAS 143589-71-3)
- Lauric anhydride (CAS 645-66-9)
- 2,3,4,5-Tetrahydro-1-benzoxepin-5-ol (CAS 20426-87-3)
- Acetyl-(Leu28·31)-Neuropeptide Y (24-36) (CAS 155709-24-3)
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