2-Hydroxy-4-(2-{1-[4-(4-methoxyphenyl)-1,3-thiazol-2-yl]-3-methyl-5-oxo-1,5-dihydro-4H-pyrazol-4-ylidene}hydrazino)benzoic acid CAS 314759-58-5

Description

2-Hydroxy-4-(2-{1-[4-(4-methoxyphenyl)-1,3-thiazol-2-yl]-3-methyl-5-oxo-1,5-dihydro-4H-pyrazol-4-ylidene}hydrazino)benzoic acid (CAS 314759-58-5), molecular formula C21H17N5O5S and molecular weight 451.46 g/mol, is a CATO reference standard with documented purity and traceability.

The molecular framework of 2-Hydroxy-4-(2-{1-[4-(4-methoxyphenyl)-1,3-thiazol-2-yl]-3-methyl-5-oxo-1,5-dihydro-4H-pyrazol-4-ylidene}hydrazino)benzoic acid (C21H17N5O5S) is characterized by a flavonoid core, an amide group, a sulfone 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 aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).

Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.

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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