| CAS No. | 428839-06-9 |
| Molecular Formula | C16H13N3O4 |
| Molecular Weight | 311.29 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
The occurrence of 3-(4-Methoxyphenyl)-1-(4-nitrophenyl)-1H-pyrazol-5-ol is closely related to a flavonoid core, an amide group, a hydroxyl group, an ether linkage in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
CATO supplies 3-(4-Methoxyphenyl)-1-(4-nitrophenyl)-1H-pyrazol-5-ol (CAS 428839-06-9), a certified reference material (molecular formula C16H13N3O4, MW 311.29 g/mol) for analytical method development and quality control.
Based on its molecular formula C16H13N3O4, 3-(4-Methoxyphenyl)-1-(4-nitrophenyl)-1H-pyrazol-5-ol contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 311.29 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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.
CATO manufactures 3-(4-Methoxyphenyl)-1-(4-nitrophenyl)-1H-pyrazol-5-ol under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
| Molecular Formula | C16H13N3O4 |
| Molecular Weight | 311.29 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| 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 |
| Degree of Unsaturation (DBE) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Nitrogen Atoms | 3 |