2,5-Dibromo-3,4-dimethoxythiophene CAS 345666-04-8
| CAS No. | 345666-04-8 |
| Molecular Formula | C6H6Br2O2S |
| Molecular Weight | 301.98 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
2,5-Dibromo-3,4-dimethoxythiophene (CAS 345666-04-8) is a high-purity analytical reference standard with the molecular formula C6H6Br2O2S and a molecular weight of 301.98 g/mol.
Structurally, 2,5-Dibromo-3,4-dimethoxythiophene (C6H6Br2O2S) contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, bromine substitution. The molecule exhibits a degree of unsaturation (DBE) of 3.0, corresponding to approximately 3 ring(s) or double-bond equivalent(s). With a molecular weight of 301.98 g/mol, it falls into the moderately-high-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), 2,5-Dibromo-3,4-dimethoxythiophene 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 | C6H6Br2O2S |
| Molecular Weight | 301.98 g/mol |
| Purity | 97%+ |
| Storage | Store at room temperature |
| 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) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 2025 |
| Halogen Content | Br-containing |
| Sulfur Atoms | 1 |
Related Dibromo Standards
- 3,4-Dibromo-2,5-dimethylthiophene 1,1-dioxide (CAS 70061-39-1)
- 3,5-Dibromo-2-(1H-pyrrol-1-yl)pyridine (CAS 1211834-37-5)
- 4,5-Dibromo-2-phenyl-1H-imidazole (CAS 56338-00-2)
- 6,7-Dibromo-1,4-dihydro-1,4-epoxynaphthalene (CAS 106750-88-3)
- 1,3-Dibromo-2-naphthalenol (CAS 30478-89-8)
- ethyl 4,5-dibromo-1H-imidazole-2-carboxylate (CAS 74840-99-6)
- 5,5-Dibromo-2,2-dimethyl-1,3-dioxane-4,6-dione (CAS 66131-14-4)
- 1,2-Dibromo-4-(difluoromethoxy)benzene (CAS 1000574-96-8)
Recommended Standards
- 1,4-Benzenediboronic Acid Bis(Neopentyl Glycol) Ester (CAS 562098-02-6)
- 2-bromo-1-(4-bromo-2-fluoro-phenyl)ethanone (CAS 869569-77-7)
- 1,4-Benzenediboronic acid bis(neopentyl glycol) ester (CAS 5565-36-6)
- 2-bromo-1-(4-bromo-3-fluoro-phenyl)ethanone (CAS 1003879-02-4)
- 6-(Difluoromethyl)-5-fluoro-3-nitropyridin-2-amine (CAS 1804730-81-1)
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- 1,3-Di(benzyloxymethyl)-5-fluorouracil (CAS 75500-03-7)
- tert-Butyl N-methyl-N-[(3S,4S)-4-methylpiperidin-3-yl]carbamate (CAS 1419075-90-3)
- 2-(Chloromethyl)oxazole-5-carboxylic acid (CAS 481667-42-9)
- (E)-Ethyl 5-hydroxypent-2-enoate (CAS 13038-13-6)
- 4-Methoxy-1H-pyrrolo[3,2-c]pyridine-3-carboxylic acid (CAS 1000341-34-3)
- 3-(4,5-Diamino-1H-pyrazol-1-yl)propan-1-ol (CAS 790652-93-6)
- 5-Bromo-N-(2-methoxyethyl)-2-nitropyridin-3-amine (CAS 2401894-62-8)
- Semaglutide Main Chain P29 (CAS 1169630-82-3)
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