4-Bromo-3-methylphenylboronic Acid CAS 221006-67-3
| CAS No. | 221006-67-3 |
| Molecular Formula | C7H8BBrO2 |
| Molecular Weight | 214.85 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 4-Bromo-3-methylphenylboronic Acid is closely related to a carboxylic acid group, a hydroxyl group, an ether linkage, bromine substitution in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
4-Bromo-3-methylphenylboronic Acid (CAS 221006-67-3), molecular formula C7H8BBrO2 and molecular weight 214.85 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to a carboxylic acid group, a hydroxyl group, an ether linkage, bromine substitution, 4-Bromo-3-methylphenylboronic Acid is typically white to off-white crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 214.85 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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).
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 | C7H8BBrO2 |
| Molecular Weight | 214.85 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 3.5 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 2020 |
| Halogen Content | Br-containing |
Related Bromo Standards
- (3-Bromo-2-methylphenyl)boronic acid (CAS 1184298-27-8)
- (3-Bromo-4-methylphenyl)boronic acid (CAS 1312765-69-7)
- (2-Bromo-5-methylphenyl)boronic acid (CAS 1450711-53-1)
- (5-Bromo-2-methylphenyl)boronic acid (CAS 774608-13-8)
- 2-Bromo-3-methylphenylboronic acid (CAS 2304635-39-8)
- 2-Bromo-4-methylphenylboronic acid (CAS 854636-01-4)
- 3-Bromo-5-methylphenylboronic Acid (CAS 849062-36-8)
- 4-Bromo-1-(trifluoromethyl)-1H-pyrazole (CAS 1046831-97-3)
Recommended Standards
- 4-Bromomethylbenzeneboronic acid, 97% (CAS 68162-47-0)
- Antimony(III) methoxide (CAS 29671-18-9)
- (4-(Methylselanyl)phenyl)boronic acid (CAS 181135-61-5)
- 2-Cyano-3-(trifluoromethyl)phenylboronic acid (CAS 1198181-40-6)
- 2-Aminoethyl lysinate trihydrochloride (CAS 104068-74-8)
- n-(3-Chlorophenyl)-2-((1-methyl-1h-imidazol-2-yl)thio)acetamide (CAS 329079-24-5)
- 1-(2-Methyl-4-phenylfuran-3-yl)ethanone (CAS 52403-77-7)
- 6-Methyl-2,4-heptanedione (CAS 3002-23-1)
- 5-Fluoro-6-(perfluoroethyl)pyrimidin-4(3H)-one (CAS 2446508-99-0)
- 3-(4-Methylphenyl)pentanoic acid (CAS 57960-06-2)
- 4-Hydroxy-3-iodo-N-methylbenzamide (CAS 1243280-49-0)
- N-(5-Amino-2-fluorophenyl)-2-(3-methylphenoxy)-propanamide (CAS 954574-23-3)
- (R)-2-Bromo-7-((tert-butyldiphenylsilyl)oxy)hept-1-en-4-ol (CAS 784194-08-7)
- Acetyl tetrapeptide-3 (CAS 827306-88-7)
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