| CAS No. | 2121511-65-5 |
| Molecular Formula | C8H9BClFO3 |
| Molecular Weight | 218.42 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Compared with other compounds in its class, the molecular weight of 218.42 g/mol gives 5-Chloro-4-ethoxy-2-fluorophenylboronic acid distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
5-Chloro-4-ethoxy-2-fluorophenylboronic acid (CAS 2121511-65-5) is a high-purity analytical reference standard with the molecular formula C8H9BClFO3 and a molecular weight of 218.42 g/mol.
Based on its molecular formula C8H9BClFO3, 5-Chloro-4-ethoxy-2-fluorophenylboronic acid contains a carboxylic acid group, a hydroxyl group, an ether linkage, fluorine/chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 218.42 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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.
As a certified reference material (CRM), 5-Chloro-4-ethoxy-2-fluorophenylboronic 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.
| Molecular Formula | C8H9BClFO3 |
| Molecular Weight | 218.42 g/mol |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), keep sealed and dry, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 3.5 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1997 |
| Halogen Content | F/Cl-containing |