2-Bromo-1-ethynyl-4-methoxybenzene CAS 871126-87-3
| CAS No. | 871126-87-3 |
| Molecular Formula | C9H7BrO |
| Molecular Weight | 211.06 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The molecular framework of 2-Bromo-1-ethynyl-4-methoxybenzene (C9H7BrO) is characterized by a hydroxyl group, an ether linkage, bromine substitution, an aromatic ring system. In reversed-phase chromatography, its retention is governed primarily by the polarity and ionization state of its functional groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
CATO supplies 2-Bromo-1-ethynyl-4-methoxybenzene (CAS 871126-87-3), a certified reference material (molecular formula C9H7BrO, MW 211.06 g/mol) for analytical method development and quality control.
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 | C9H7BrO |
| Molecular Weight | 211.06 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1987 |
| Halogen Content | Br-containing |
Related Bromo Standards
- 4-Bromo-6-methyl-7-azaindole (CAS 1000340-58-8)
- 3-Bromo-7-methyl-1H-pyrrolo[3,2-c]pyridine (CAS 1000341-40-1)
- 3-Bromo-4-methyl-1H-pyrrolo[3,2-c]pyridine (CAS 1000342-72-2)
- 6-Bromo-5-methyl-1H-indazole (CAS 1000343-69-0)
- 7-Bromo-1-methylindazole (CAS 1000576-59-9)
- 1-Bromo-2-ethynyl-4-methoxybenzene (CAS 1011736-13-2)
- 4-Bromo-2-methyl-7-azaindole (CAS 1014613-64-9)
- 3-Bromo-1-phenylprop-2-yn-1-ol (CAS 10508-57-3)
Recommended Standards
- 2-Amino-6-bromo-4-methylbenzonitrile (CAS 2385515-63-7)
- 2-bromo-1-methyl-benzimidazole (CAS 49572-60-3)
- 2-Amino-2-(2-bromophenyl)acetonitrile (CAS 252637-89-1)
- 2-Bromo-3-methylbenzofuran (CAS 38281-48-0)
- 5-(5-Chlorothiophen-2-yl)-1,2-oxazole-4-carboxylic acid (CAS 1368489-92-2)
- Ethyl 5-oxononanoate (CAS 24071-99-6)
- 5-(Triethoxysilyl)thiazole (CAS 1243360-03-3)
- tert-butyl 4-chloro-1H-pyrrolo[2,3-b]pyridine-5-carboxylate (CAS 2436761-04-3)
- Benzenamine, 4-[(1-cyclobutyl-4-piperidinyl)oxy]- (CAS 862310-33-6)
- 1354960-67-0 5-Chloro-2,4-difluoro-N-(methylsulfonyl)benzamide (CAS 1354960-67-0)
- 3-(3-(4-Chlorophenyl)-1-phenyl-1H-pyrazol-4-yl)propanoic acid (CAS 108446-79-3)
- 4-Ethyl-5-isobutyl-1H-pyrazole (CAS 321864-90-8)
- Tert-butyl 4-fluoro-2-(hydroxymethyl)pyrrolidine-1-carboxylate (CAS 1334491-14-3)
- Semaglutide impurity 28 (CAS CATO-C4X-222628)
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