3,5-Dichloroisothiazole-4-carboxylic acid CAS 3889-59-6

Description

Compared with other compounds in its class, the molecular weight of 198.03 g/mol gives 3,5-Dichloroisothiazole-4-carboxylic acid distinctive chromatographic separation conditions and mass-spectrometry parameter settings.

CATO supplies 3,5-Dichloroisothiazole-4-carboxylic acid (CAS 3889-59-6), a certified reference material (molecular formula C4HCl2NO2S, MW 198.03 g/mol) for analytical method development and quality control.

3,5-Dichloroisothiazole-4-carboxylic acid (C4HCl2NO2S) contains an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution. Halogen substitution raises its density and boiling point, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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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