1-(4-Bromo-2-fluorophenyl)-5-methyl-1H-pyrazole-4-carboxylic acid CAS 1189749-52-7

Description

1-(4-Bromo-2-fluorophenyl)-5-methyl-1H-pyrazole-4-carboxylic acid (C11H8BrFN2O2) contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, fluorine/bromine substitution. It is notably hygroscopic, halogen substitution raises its density and boiling point, its high carbon-to-hydrogen ratio confers good lipid solubility, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).

CATO supplies 1-(4-Bromo-2-fluorophenyl)-5-methyl-1H-pyrazole-4-carboxylic acid (CAS 1189749-52-7), a certified reference material (molecular formula C11H8BrFN2O2, MW 299.10 g/mol) for analytical method development and quality control.

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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