2,5-Dibromo-3-methoxythiophene CAS 148078-36-8
| CAS No. | 148078-36-8 |
| Molecular Formula | C5H4Br2OS |
| Molecular Weight | 271.96 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 271.96 g/mol gives 2,5-Dibromo-3-methoxythiophene distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
2,5-Dibromo-3-methoxythiophene (CAS 148078-36-8), molecular formula C5H4Br2OS and molecular weight 271.96 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C5H4Br2OS, 2,5-Dibromo-3-methoxythiophene contains sulfur-containing functionality, a hydroxyl group, an ether linkage, bromine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 271.96 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).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
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 | C5H4Br2OS |
| Molecular Weight | 271.96 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 |
| Degree of Unsaturation (DBE) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1999 |
| Halogen Content | Br-containing |
| Sulfur Atoms | 1 |
Related Dibromo Standards
- 3,5-dibromo-2-methoxythiophene (CAS 77133-30-3)
- 2,2-Dibromo-1-methylcyclopropane-1-carbohydrazide (CAS 85426-53-5)
- 2,4-dibromo-2,4-dimethyl-3-pentanone (CAS 17346-16-6)
- 1,7-Dibromo-heptan-4-one (CAS 89774-18-5)
- Methyl 2,2-dibromo-1-methylcyclopropane-1-carboxylate (CAS 39647-01-3)
- α,α′-Dibromo-p-xylene-d8 (CAS 74903-77-8)
- 1,4-Dibromo-piperazine-2,5-dione (CAS 37636-53-6)
- 1,3-Dibromo-2,5-difluorobenzene (CAS 128259-68-7)
Recommended Standards
- 3,5-Bis(trifluoromethyl)benzylboronic acid (CAS 1451393-52-4)
- (2,5-Dibromothiophen-3-yl)methanol (CAS 161490-95-5)
- (3,5-Dibromothiophen-2-yl)methanol (CAS 675872-43-2)
- 2-(1-Bromoethyl)-1,3-dichloro-4-fluorobenzene (CAS 1331786-28-7)
- 1,5-Bis(hydroxyamino)anthracene-9,10-dione (CAS 60080-32-2)
- 3-{[4-(Diethylamino)benzyl]amino}propanohydrazide (CAS 1040688-50-3)
- Azidoethyl-SS-ethylazide (CAS 352305-38-5)
- 4-Hydroxy-5-(hydroxymethyl)-2-oxo-2,5-dihydro-1H-pyrrole-3-carbonitrile (CAS 209963-51-9)
- Calciferol Impurity 4 (CAS 3270-02-8)
- (4-Chlorobutyl)cyclopentane (CAS 22565-44-2)
- Benserazide impurity 47 (CAS CATO-C4X-142747)
- 4'-(Dimethylamino)[1,1'-biphenyl]-4-carboxylic acid (CAS 195457-75-1)
- 5-Ethoxypyrimidine-2-carbaldehyde (CAS 2411260-18-7)
- Gastric Inhibitory Polypeptide (6-30) amide (human) (CAS 1139691-72-7)
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