4-(2,5-Dichlorophenoxy)-3-methylisoxazolo[5,4-d]pyrimidine CAS 672925-32-5

Description

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.

4-(2,5-Dichlorophenoxy)-3-methylisoxazolo[5,4-d]pyrimidine (CAS 672925-32-5), molecular formula C12H7Cl2N3O2 and molecular weight 296.11 g/mol, is a CATO reference standard with documented purity and traceability.

The molecular framework of 4-(2,5-Dichlorophenoxy)-3-methylisoxazolo[5,4-d]pyrimidine (C12H7Cl2N3O2) is characterized by a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, chlorine substitution. 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.

Physical & Chemical Properties

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