4-(5-Oxo-4,5-dihydropyrazin-2-yl)benzoic acid CAS 98377-47-0

Description

The occurrence of 4-(5-Oxo-4,5-dihydropyrazin-2-yl)benzoic acid is closely related to an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.

4-(5-Oxo-4,5-dihydropyrazin-2-yl)benzoic acid (CAS 98377-47-0), molecular formula C11H8N2O3 and molecular weight 216.19 g/mol, is a CATO reference standard with documented purity and traceability.

Structurally, 4-(5-Oxo-4,5-dihydropyrazin-2-yl)benzoic acid (C11H8N2O3) contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 9.0, corresponding to approximately 9 ring(s) or double-bond equivalent(s). With a molecular weight of 216.19 g/mol, it falls into the medium-molecular-weight range. 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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