5-Methyl-3-(thiophen-2-yl)isoxazole-4-carboxylic acid CAS 83817-53-2

Description

Compared with other compounds in its class, the molecular weight of 209.22 g/mol gives 5-Methyl-3-(thiophen-2-yl)isoxazole-4-carboxylic acid distinctive chromatographic separation conditions and mass-spectrometry parameter settings.

CATO supplies 5-Methyl-3-(thiophen-2-yl)isoxazole-4-carboxylic acid (CAS 83817-53-2), a certified reference material (molecular formula C9H7NO3S, MW 209.22 g/mol) for analytical method development and quality control.

The molecular framework of 5-Methyl-3-(thiophen-2-yl)isoxazole-4-carboxylic acid (C9H7NO3S) is characterized by a nitrogen-containing heterocyclic scaffold, 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. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.

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.

As a certified reference material (CRM), 5-Methyl-3-(thiophen-2-yl)isoxazole-4-carboxylic acid meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.

Physical & Chemical Properties

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