3,5-Bis(4-nitrobenzylidene)tetrahydro-4H-thiopyran-4-one 1,1-dioxide CAS 108477-18-5

Description

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.

3,5-Bis(4-nitrobenzylidene)tetrahydro-4H-thiopyran-4-one 1,1-dioxide (CAS 108477-18-5), molecular formula C19H14N2O7S and molecular weight 414.39 g/mol, is a CATO reference standard with documented purity and traceability.

3,5-Bis(4-nitrobenzylidene)tetrahydro-4H-thiopyran-4-one 1,1-dioxide (C19H14N2O7S) contains a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage. It is notably hygroscopic, 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).

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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