4-Bromo-3-methoxy-5-methylthiophene-2-carboxylic acid CAS 113589-56-3

Description

The occurrence of 4-Bromo-3-methoxy-5-methylthiophene-2-carboxylic acid is closely related to a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, bromine substitution, an aromatic ring system in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.

4-Bromo-3-methoxy-5-methylthiophene-2-carboxylic acid (CAS 113589-56-3) is a high-purity analytical reference standard with the molecular formula C7H7BrO3S and a molecular weight of 251.10 g/mol.

The molecular framework of 4-Bromo-3-methoxy-5-methylthiophene-2-carboxylic acid (C7H7BrO3S) is characterized by a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, bromine substitution, an aromatic ring system. In reversed-phase chromatography, its retention is governed primarily by the polarity and ionization state of its functional groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.

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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