5-[(4-ethoxyphenyl)sulfamoyl]-2-methylbenzoic acid CAS 431893-89-9

Description

Compared with other compounds in its class, the molecular weight of 335.37 g/mol gives 5-[(4-ethoxyphenyl)sulfamoyl]-2-methylbenzoic acid distinctive chromatographic separation conditions and mass-spectrometry parameter settings.

5-[(4-ethoxyphenyl)sulfamoyl]-2-methylbenzoic acid (CAS 431893-89-9), molecular formula C16H17NO5S and molecular weight 335.37 g/mol, is a CATO reference standard with documented purity and traceability.

The molecular framework of 5-[(4-ethoxyphenyl)sulfamoyl]-2-methylbenzoic acid (C16H17NO5S) 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).

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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