2-Bromo-5-methyloxazole-4-carboxylic acid CAS 1511684-79-9

Description

The occurrence of 2-Bromo-5-methyloxazole-4-carboxylic acid is closely related to an amide group, a carboxylic acid group, a hydroxyl group, an ether linkage, bromine substitution in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.

2-Bromo-5-methyloxazole-4-carboxylic acid (CAS 1511684-79-9), molecular formula C5H4BrNO3 and molecular weight 205.99 g/mol, is a CATO reference standard with documented purity and traceability.

The molecular framework of 2-Bromo-5-methyloxazole-4-carboxylic acid (C5H4BrNO3) is characterized by an amide group, a carboxylic acid group, a hydroxyl group, an ether linkage, bromine 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. 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.

As a certified reference material (CRM), 2-Bromo-5-methyloxazole-4-carboxylic acid meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.

Physical & Chemical Properties

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