4-Carboxy-2-methoxyphenylboronic Acid CAS 741699-09-2
| CAS No. | 741699-09-2 |
| Molecular Formula | C8H9BO5 |
| Molecular Weight | 195.97 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
4-Carboxy-2-methoxyphenylboronic Acid (CAS 741699-09-2), molecular formula C8H9BO5 and molecular weight 195.97 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, 4-Carboxy-2-methoxyphenylboronic Acid (C8H9BO5) contains a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. The molecule exhibits a degree of unsaturation (DBE) of 4.5, corresponding to approximately 4 ring(s) or double-bond equivalent(s). With a molecular weight of 195.97 g/mol, it falls into the medium-molecular-weight range. 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), 4-Carboxy-2-methoxyphenylboronic 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 | C8H9BO5 |
| Molecular Weight | 195.97 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.) | 1986 |
Related Carboxy Standards
- 3-Carboxy-4-methoxyphenylboronic Acid (CAS 913836-12-1)
- 4-Carboxy-3-nitrobenzylamine (CAS 100466-28-2)
- 3-[carboxy(hydroxy)methyl]benzoic acid (CAS 54440-90-3)
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- 3-Carboxy-α-methylbenzeneacetic Acid-d3 (CAS 1330265-71-8)
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Recommended Standards
- 4-Trifluoromethylphenylboronic acid (CAS 128796-39-4)
- 3-Borono-4-methoxybenzoic acid (CAS 730971-32-1)
- 3-Trifluoromethylphenylboronic acid (CAS 1423-26-3)
- 3-Borono-2-methoxybenzoic acid (CAS 913836-10-9)
- 1-BROMO-5-CYCLOBUTOXY-2-FLUORO-4-METHOXYBENZENE (CAS 1637567-21-5)
- 4-Chloro-6-(2,4-dichlorophenyl)pyrimidine (CAS 954220-66-7)
- 4-Formylpyridine-3-carboxylic acid (CAS 395645-41-7)
- 8-Benzyl-8-azabicyclo[3.2.1]octane-3-carboxylic acid hydrochloride (CAS 1311316-62-7)
- Relebactam Impurity 90 (CAS 2365454-30-2)
- 1,4-Di(pyridin-4-yl)butane (CAS 2029-58-5)
- N-Chloroacetyl-DL-isoleucine (CAS 1115-24-8)
- Procaterol Impurity N7 (CAS 15450-72-3)
- Ethyl 2,2-bis(2,4-dinitrophenyl)acetate (CAS 5833-18-1)
- KALA Amphipathic Peptide (CAS 187987-64-0)
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