1-(3,5-Dimethylphenyl)-3-(ethoxycarbonyl)-5-methyl-4,5-dihydro-1h-pyrazole-5-carboxylic acid CAS 1264042-80-9

Description

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.

1-(3,5-Dimethylphenyl)-3-(ethoxycarbonyl)-5-methyl-4,5-dihydro-1h-pyrazole-5-carboxylic acid (CAS 1264042-80-9), molecular formula C16H20N2O4 and molecular weight 304.34 g/mol, is a CATO reference standard with documented purity and traceability.

1-(3,5-Dimethylphenyl)-3-(ethoxycarbonyl)-5-methyl-4,5-dihydro-1h-pyrazole-5-carboxylic acid (C16H20N2O4) 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. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).

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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