3,4-Bis(4-methoxybenzoyl)-1,2,5-oxadiazole 2-oxide CAS 40499-78-3

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.

3,4-Bis(4-methoxybenzoyl)-1,2,5-oxadiazole 2-oxide (CAS 40499-78-3), molecular formula C18H14N2O6 and molecular weight 354.31 g/mol, is a CATO reference standard with documented purity and traceability.

Based on its molecular formula C18H14N2O6, 3,4-Bis(4-methoxybenzoyl)-1,2,5-oxadiazole 2-oxide contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 354.31 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.

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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