3-Bromo-5-(4-methoxyphenyl)-2-methylthiophene CAS 156686-75-8
| CAS No. | 156686-75-8 |
| Molecular Formula | C12H11BrOS |
| Molecular Weight | 283.18 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), 3-Bromo-5-(4-methoxyphenyl)-2-methylthiophene 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.
3-Bromo-5-(4-methoxyphenyl)-2-methylthiophene (CAS 156686-75-8) is a high-purity analytical reference standard with the molecular formula C12H11BrOS and a molecular weight of 283.18 g/mol.
Owing to sulfur-containing functionality, a hydroxyl group, an ether linkage, bromine substitution, an aromatic ring system, 3-Bromo-5-(4-methoxyphenyl)-2-methylthiophene is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 283.18 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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.
Physical & Chemical Properties
| Molecular Formula | C12H11BrOS |
| Molecular Weight | 283.18 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2001 |
| Halogen Content | Br-containing |
| Sulfur Atoms | 1 |
Related Bromo Standards
- 2-Bromo-1-(3,5-dimethylbenzo[b]thiophen-2-yl)ethan-1-one (CAS 388088-83-3)
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Recommended Standards
- 3-(2-(3-Bromophenoxy)ethyl)thiophene (CAS 1492588-72-3)
- 7'-Bromospiro[cyclobutane-1,2'-thiochroman]-4'-one (CAS 1823366-63-7)
- tert-butyl N-[(2E)-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)prop-2-en-1-yl]carbamate (CAS 468060-28-8)
- 6'-Bromospiro[cyclobutane-1,2'-thiochroman]-4'-one (CAS 1823873-21-7)
- 3-Bromo-4-methyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine (CAS 2043397-75-5)
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