7-Fluoro-6-methoxybenzo[d]isothiazole-3-carboxylic acid CAS 936923-47-6

Description

Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including 7-Fluoro-6-methoxybenzo[d]isothiazole-3-carboxylic acid.

7-Fluoro-6-methoxybenzo[d]isothiazole-3-carboxylic acid (CAS 936923-47-6), molecular formula C9H6FNO3S and molecular weight 227.21 g/mol, is a CATO reference standard with documented purity and traceability.

7-Fluoro-6-methoxybenzo[d]isothiazole-3-carboxylic acid (C9H6FNO3S) contains a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage, fluorine substitution. It is notably hygroscopic, 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. 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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