4-Hydroxy-2-methylphenylboronic Acid Pinacol Ester CAS 946427-03-8
| CAS No. | 946427-03-8 |
| Molecular Formula | C13H19BO3 |
| Molecular Weight | 234.10 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
4-Hydroxy-2-methylphenylboronic Acid Pinacol Ester (CAS 946427-03-8) is a high-purity analytical reference standard with the molecular formula C13H19BO3 and a molecular weight of 234.10 g/mol.
Based on its molecular formula C13H19BO3, 4-Hydroxy-2-methylphenylboronic Acid Pinacol Ester contains a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 234.10 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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 | C13H19BO3 |
| Molecular Weight | 234.10 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), keep sealed and dry |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 4.5 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1987 |
Related Hydroxy Standards
- 3-Hydroxy-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzaldehyde (CAS 1604802-47-2)
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Recommended Standards
- 4-Cyclopropyl-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole (CAS 2241865-20-1)
- 5-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)benzene-1,3-diamine (CAS 428820-96-6)
- 4,6-Dimethyl-2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyrimidine (CAS 2246810-00-2)
- 5,7-Dichloro-6-methyl-1,3-benzoxazole-2-thiol (CAS 199293-12-4)
- 8-Chloro-3-ethyl-1,7-naphthyridin-2(1H)-one (CAS 1807350-83-9)
- butyl(butylidene)amine (CAS 4853-56-9)
- 3-(4-Fluorophenyl)-3-(2-hydroxy-4-methylphenyl)isobenzofuran-1(3H)-one (CAS 148238-44-2)
- 2-(Aminomethyl)-4-(difluoromethyl)-5-methoxypyridine-3-carboxaldehyde (CAS 1361469-77-3)
- 4-Methyl-2-(pyridin-4-yl)hexan-1-amine (CAS 1306604-05-6)
- Prodelphinidin B4 (CAS 68964-95-4)
- 5,5'-(1H-1,2,3-Triazole-4,5-diyl)bis(2H-tetrazole) (CAS 869060-66-2)
- Ethyl 3-nitro-4-(piperazin-1-yl)benzoate (CAS 886631-29-4)
- 3-Hydroxy-N,N-dimethylpicolinamide (CAS 1076-23-9)
- Acetyl Tetrapeptide-5 (CAS 820959-17-9)
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