3,5-dibromo-2-methoxythiophene CAS 77133-30-3
| CAS No. | 77133-30-3 |
| Molecular Formula | C5H4Br2OS |
| Molecular Weight | 271.96 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Structurally, 3,5-dibromo-2-methoxythiophene (C5H4Br2OS) contains sulfur-containing functionality, 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 271.96 g/mol, it falls into the medium-molecular-weight range. 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).
3,5-dibromo-2-methoxythiophene (CAS 77133-30-3) is a high-purity analytical reference standard with the molecular formula C5H4Br2OS and a molecular weight of 271.96 g/mol.
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 3,5-dibromo-2-methoxythiophene 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 | 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.) | 1979 |
| Halogen Content | Br-containing |
| Sulfur Atoms | 1 |
Related dibromo Standards
- 2,5-Dibromo-3-methoxythiophene (CAS 148078-36-8)
- 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
- (4,5-Dibromothiophen-3-yl)methanol (CAS 73919-89-8)
- 2-(bromomethyl)-4,6-dichloro-pyridine-3-carbonitrile (CAS 1589541-02-5)
- (4,5-Dibromothiophen-2-yl)methanol (CAS 773868-55-6)
- (3,5-Dibromothiophen-2-yl)methanol (CAS 675872-43-2)
- 1-(2-Bromo-6-fluorophenyl)-2-methylpropan-1-one (CAS 693285-70-0)
- 1-Bromo-4-((2-bromoethoxy)methyl)benzene (CAS 103061-55-8)
- 3,5-Bis(trifluoromethyl)pyridin-2-ol (CAS 38609-76-6)
- N-(4-Chlorophenyl)-4-(4-cyanophenyl)tetrahydro-1(2H)-pyrazinecarboxamide (CAS 478046-85-4)
- 3-methylpiperidin-4-one hydrochloride (CAS 4629-78-1)
- 2,2,2-Trifluoro-1-(4'-methyl-[1,1'-biphenyl]-4-yl)ethan-1-one (CAS 1079392-70-3)
- 3-(Azidomethyl)tetrahydrofuran (CAS 85182-08-7)
- Methyl 2-(3-azaspiro[5.5]Undecan-9-yl)acetate (CAS 1017623-70-9)
- (5-Oxaspiro[2.4]Heptan-6-yl)methanol (CAS 2059971-81-0)
- Tirzepatide Impurity 19 X TFA Salt (CAS CATO-C4X-324019)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
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