4-(4-Bromophenyl)but-3-yn-2-ol CAS 129725-59-3
| CAS No. | 129725-59-3 |
| Molecular Formula | C10H9BrO |
| Molecular Weight | 225.08 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 225.08 g/mol gives 4-(4-Bromophenyl)but-3-yn-2-ol distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
4-(4-Bromophenyl)but-3-yn-2-ol (CAS 129725-59-3), molecular formula C10H9BrO and molecular weight 225.08 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to a hydroxyl group, an ether linkage, bromine substitution, an aromatic ring system, 4-(4-Bromophenyl)but-3-yn-2-ol is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 225.08 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
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.
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 | C10H9BrO |
| Molecular Weight | 225.08 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 chloroform, dichloromethane, ethyl acetate, DMSO |
| 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.) | 1994 |
| Halogen Content | Br-containing |
Related Bromophenyl Standards
- 2-(2-bromophenyl)but-3-yn-2-ol (CAS 104684-12-0)
- 1-(4-Bromophenyl)cyclopropane-1-carbaldehyde (CAS 1147531-61-0)
- 1-(3-Bromophenyl)cyclopropane-1-carbaldehyde (CAS 1267279-00-4)
- (3-Bromophenyl)(cyclopropyl)methanone (CAS 693774-26-4)
- (4-Bromophenyl)(cyclopropyl)ketone (CAS 6952-89-2)
- (E)-4-(3-Bromophenyl)but-3-en-2-one (CAS 65300-30-3)
- (E)-4-(4-Bromophenyl)but-3-en-2-one (CAS 3815-31-4)
- 1-(4-Bromophenyl)but-3-yn-1-ol (CAS 94612-95-0)
Recommended Standards
- 5-Bromo-7-methyl-2,3-dihydro-1H-inden-1-one (CAS 1273609-67-8)
- 5-Bromo-2-tetralone (CAS 132095-53-5)
- 7-Bromo-2-tetralone (CAS 132095-54-6)
- 7-Bromo-6-methyl-2,3-dihydro-1H-inden-1-one (CAS 1260012-96-1)
- 3-Methyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1-((2-(trimethylsilyl)ethoxy)methyl)-1H-pyrazole (CAS 1690341-57-1)
- 1142204-61-2 9307AC C20H24N2O5 [(2-{[2-(3,4-Dimethoxyphenyl)ethyl]amino}-2-oxoethyl)(phenyl)amino]acetic acid (CAS 1142204-61-2)
- 1-(Difluoromethyl)-4-(trifluoromethoxy)benzene (CAS 934738-22-4)
- Methyl 2-ethyl-4-methoxy-2H-indazole-6-carboxylate (CAS 1245215-49-9)
- 6-(4-Fluorophenyl)imidazo[1,5-a]pyrazin-8(7H)-one (CAS 849201-29-2)
- 4-((3,4-Dimethoxyphenyl)amino)-4-oxobut-2-enoicacid (CAS 468747-44-6)
- 3-Bromo-N-(p-tolyl)benzenesulfonamide (CAS 1166183-52-3)
- Promestriene Impurity 2 (CAS CATO-C4X-22052)
- Aristolochic Acid A-13C,d3 (CAS CATO-C3D-5883)
- Semaglutide impurity 33 (CAS CATO-C4X-222633)
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