5,7-Dimethoxybenzo[d]isothiazol-3(2H)-one 1,1-dioxide CAS 64404-51-9

Description

As a certified reference material (CRM), 5,7-Dimethoxybenzo[d]isothiazol-3(2H)-one 1,1-dioxide meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.

5,7-Dimethoxybenzo[d]isothiazol-3(2H)-one 1,1-dioxide (CAS 64404-51-9), molecular formula C9H9NO5S and molecular weight 243.24 g/mol, is a CATO reference standard with documented purity and traceability.

The molecular framework of 5,7-Dimethoxybenzo[d]isothiazol-3(2H)-one 1,1-dioxide (C9H9NO5S) is characterized by a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. 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.

Physical & Chemical Properties

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