5-(4-Ethoxyphenyl)-3-methylisoxazolo[5,4-d]pyrimidin-4(5H)-one CAS 94640-97-8

Description

Compared with other compounds in its class, the molecular weight of 271.27 g/mol gives 5-(4-Ethoxyphenyl)-3-methylisoxazolo[5,4-d]pyrimidin-4(5H)-one distinctive chromatographic separation conditions and mass-spectrometry parameter settings.

5-(4-Ethoxyphenyl)-3-methylisoxazolo[5,4-d]pyrimidin-4(5H)-one (CAS 94640-97-8), molecular formula C14H13N3O3 and molecular weight 271.27 g/mol, is a CATO reference standard with documented purity and traceability.

5-(4-Ethoxyphenyl)-3-methylisoxazolo[5,4-d]pyrimidin-4(5H)-one (C14H13N3O3) contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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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