4-(3-(3',6'-DIhydroxy-3-oxo-3h-spiro[isobenzofuran-1,9'-xanthen]-5-yl)thioureido)butanoic acid CAS 1803631-03-9

Description

Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.

4-(3-(3',6'-DIhydroxy-3-oxo-3h-spiro[isobenzofuran-1,9'-xanthen]-5-yl)thioureido)butanoic acid (CAS 1803631-03-9), molecular formula C25H20N2O7S and molecular weight 492.50 g/mol, is a CATO reference standard with documented purity and traceability.

The molecular framework of 4-(3-(3',6'-DIhydroxy-3-oxo-3h-spiro[isobenzofuran-1,9'-xanthen]-5-yl)thioureido)butanoic acid (C25H20N2O7S) is characterized by a flavonoid core, 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. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.

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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