(2-Formyl-5-methoxyphenyl)boronic acid CAS 40138-18-9
| CAS No. | 40138-18-9 |
| Molecular Formula | C8H9BO4 |
| Molecular Weight | 179.97 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
(2-Formyl-5-methoxyphenyl)boronic acid (CAS 40138-18-9) is a high-purity analytical reference standard with the molecular formula C8H9BO4 and a molecular weight of 179.97 g/mol.
The molecular framework of (2-Formyl-5-methoxyphenyl)boronic acid (C8H9BO4) is characterized by a carboxylic acid group, a hydroxyl group, an ether linkage, 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. 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).
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.
As a certified reference material (CRM), (2-Formyl-5-methoxyphenyl)boronic acid meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C8H9BO4 |
| Molecular Weight | 179.97 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| 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) | 4.5 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1968 |
Related Formyl Standards
- (4-Formyl-2-methoxyphenyl)boronic acid (CAS 1028479-47-1)
- (5-Formyl-2-methoxyphenyl)boronic acid (CAS 127972-02-5)
- 2-Formyl-4-methoxyphenylboronic Acid (CAS 139962-95-1)
- 5-Formyl-3-methoxyphenylboronic acid (CAS 1451392-09-8)
- (2-Formyl-3-methoxyphenyl)boronic acid (CAS 958030-46-1)
- (2-Formyl-6-methoxyphenyl)boronic acid (CAS 420800-54-0)
- (3-Formyl-2-methoxyphenyl)boronic Acid (CAS 480424-49-5)
- (4-Formyl-3-methoxyphenyl)boronic acid (CAS 815620-00-9)
Recommended Standards
- (2,3-Dihydrobenzo[b][1,4]dioxin-5-yl)boronic acid (CAS 499769-88-9)
- (3-(Hydrazinecarbonyl)phenyl)boronic acid (CAS 913835-79-7)
- (2,3-Dihydrobenzo[b][1,4]dioxin-2-yl)boronic acid (CAS 499769-89-0)
- (3-(N-Hydroxycarbamimidoyl)phenyl)boronic acid (CAS 939999-91-4)
- 2,4-Dimethylquinolin-7-ol (CAS 72365-58-3)
- 1-Azaspiro[4.4]nonane-2,4-dione (CAS 1803583-58-5)
- 2H-1,2,3-Triazole-4-carbaldehyde (CAS 4343-71-9)
- 3-(2-Mercaptoethoxy)propanoic acid (CAS 1260092-48-5)
- 5,6-Dihydro-8H-imidazo[2,1-c] [1,4] oxazine-2-carboxaldehyde (CAS 623564-42-1)
- 4-Difluoromethanesulfonamido-2-methoxybenzene-1-sulfonyl chloride (CAS 1041583-35-0)
- Cefixime Impurity 45 (CAS CATO-C4X-113945)
- (5-Butoxy-2,4-dichlorophenyl)boronic acid (CAS 1256354-88-7)
- 4-Epi-isoinuviscolide (CAS 68832-39-3)
- Liraglutide(3-31)TFA Salt (CAS CATO-C4X-19921)
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