| CAS No. | 394237-59-3 |
| Molecular Formula | C18H17FN2O2 |
| Molecular Weight | 312.34 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
The occurrence of 5-Ethoxy-2-(4-(4-fluorophenyl)-5-methyl-1H-pyrazol-3-yl)phenol is closely related to a steroid core, an amide group, a hydroxyl group, an ether linkage, fluorine substitution in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
5-Ethoxy-2-(4-(4-fluorophenyl)-5-methyl-1H-pyrazol-3-yl)phenol (CAS 394237-59-3) is a high-purity analytical reference standard with the molecular formula C18H17FN2O2 and a molecular weight of 312.34 g/mol.
Based on its molecular formula C18H17FN2O2, 5-Ethoxy-2-(4-(4-fluorophenyl)-5-methyl-1H-pyrazol-3-yl)phenol contains a steroid core, an amide group, a hydroxyl group, an ether linkage, fluorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 312.34 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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), 5-Ethoxy-2-(4-(4-fluorophenyl)-5-methyl-1H-pyrazol-3-yl)phenol 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 | C18H17FN2O2 |
| Molecular Weight | 312.34 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Halogen Content | F-containing |
| Nitrogen Atoms | 2 |