(2-Ethoxy-5-methylphenyl)boronic acid CAS 123291-97-4
| CAS No. | 123291-97-4 |
| Molecular Formula | C9H13BO3 |
| Molecular Weight | 180.01 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of (2-Ethoxy-5-methylphenyl)boronic acid is closely related to a carboxylic acid group, a hydroxyl group, an ether linkage in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
(2-Ethoxy-5-methylphenyl)boronic acid (CAS 123291-97-4), molecular formula C9H13BO3 and molecular weight 180.01 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to a carboxylic acid group, a hydroxyl group, an ether linkage, (2-Ethoxy-5-methylphenyl)boronic acid is typically white to off-white crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 180.01 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 | C9H13BO3 |
| Molecular Weight | 180.01 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 3.5 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1992 |
Related Ethoxy Standards
- (3-Ethoxy-5-methylphenyl)boronic acid (CAS 1256346-05-0)
- 5-Ethoxy-2-methylphenylboronic acid (CAS 1383576-05-3)
- 3-Ethoxy-4-methylphenylboronic acid (CAS 1451391-68-6)
- 2-Ethoxy-4-methylphenylboronic acid (CAS 1451391-71-1)
- (2-Ethoxy-3-methylphenyl)boronic acid (CAS 1704064-20-9)
- (4-Ethoxy-2-methylphenyl)boronic acid (CAS 313545-31-2)
- 4-Ethoxy-3-methylphenylboronic Acid (CAS 850568-08-0)
- 3-Ethoxy-5-(trifluoromethyl)-1H-pyrazole (CAS 676487-70-0)
Recommended Standards
- 3-Chloro-4-(chloromethyl)-2-fluoropyridine (CAS 1227606-96-3)
- 2-Chloro-4-(chloromethyl)-3-fluoropyridine (CAS 1227606-88-3)
- (6-(Ethyl(methyl)amino)pyridin-2-yl)boronic acid (CAS 1264153-68-5)
- 5-Chloro-3-(chloromethyl)-2-fluoropyridine (CAS 1227606-17-8)
- 5-Bromo-2-methoxypyridin-4-amine (CAS 1232431-48-9)
- 6-(3-Bromophenyl)-2-thioxo-2,3-dihydropyrimidin-4(1H)-one (CAS 33166-82-4)
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