Methyl 4-bromo-5-methylthiophene-2-carboxylate CAS 237385-15-8

Description

Methyl 4-bromo-5-methylthiophene-2-carboxylate (CAS 237385-15-8), molecular formula C7H7BrO2S and molecular weight 235.10 g/mol, is a CATO reference standard with documented purity and traceability.

Structurally, Methyl 4-bromo-5-methylthiophene-2-carboxylate (C7H7BrO2S) contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, bromine substitution, an aromatic ring system. The molecule exhibits a degree of unsaturation (DBE) of 4.0, corresponding to approximately 4 ring(s) or double-bond equivalent(s). With a molecular weight of 235.10 g/mol, it falls into the medium-molecular-weight range. 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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