5-Ethyl-4-methylisoxazol-3(2H)-one CAS 51671-62-6

Description

Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including 5-Ethyl-4-methylisoxazol-3(2H)-one.

CATO supplies 5-Ethyl-4-methylisoxazol-3(2H)-one (CAS 51671-62-6), a certified reference material (molecular formula C6H9NO2, MW 127.14 g/mol) for analytical method development and quality control.

Based on its molecular formula C6H9NO2, 5-Ethyl-4-methylisoxazol-3(2H)-one contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 127.14 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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.

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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