Isothiazole-3-carboxylic acid CAS 4576-90-3

Description

Compared with other compounds in its class, the molecular weight of 129.14 g/mol gives Isothiazole-3-carboxylic acid distinctive chromatographic separation conditions and mass-spectrometry parameter settings.

Isothiazole-3-carboxylic acid (CAS 4576-90-3) is a high-purity analytical reference standard with the molecular formula C4H3NO2S and a molecular weight of 129.14 g/mol.

Based on its molecular formula C4H3NO2S, Isothiazole-3-carboxylic acid contains an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 129.14 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).

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.

CATO manufactures Isothiazole-3-carboxylic acid under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.

Physical & Chemical Properties

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