3-(4-Nitrophenyl)-1H-pyrazol-5(4H)-one CAS 54945-13-0

Description

The occurrence of 3-(4-Nitrophenyl)-1H-pyrazol-5(4H)-one is closely related to an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.

3-(4-Nitrophenyl)-1H-pyrazol-5(4H)-one (CAS 54945-13-0) is a high-purity analytical reference standard with the molecular formula C9H7N3O3 and a molecular weight of 205.17 g/mol.

The molecular framework of 3-(4-Nitrophenyl)-1H-pyrazol-5(4H)-one (C9H7N3O3) is characterized by an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing 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.

The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.

Physical & Chemical Properties

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