3-(Ethoxycarbonyl)-5-methyl-1-(4-phenoxyphenyl)-4,5-dihydro-1h-pyrazole-5-carboxylic acid CAS 1264044-02-1

Description

3-(Ethoxycarbonyl)-5-methyl-1-(4-phenoxyphenyl)-4,5-dihydro-1h-pyrazole-5-carboxylic acid (C20H20N2O5) contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.

CATO supplies 3-(Ethoxycarbonyl)-5-methyl-1-(4-phenoxyphenyl)-4,5-dihydro-1h-pyrazole-5-carboxylic acid (CAS 1264044-02-1), a certified reference material (molecular formula C20H20N2O5, MW 368.38 g/mol) for analytical method development and quality control.

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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