5-Methoxy-4-oxo-4H-chromene-3-carboxylic acid CAS 76743-83-4

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.

5-Methoxy-4-oxo-4H-chromene-3-carboxylic acid (CAS 76743-83-4), molecular formula C11H8O5 and molecular weight 220.18 g/mol, is a CATO reference standard with documented purity and traceability.

Structurally, 5-Methoxy-4-oxo-4H-chromene-3-carboxylic acid (C11H8O5) contains a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. The molecule exhibits a degree of unsaturation (DBE) of 8.0, corresponding to approximately 8 ring(s) or double-bond equivalent(s). With a molecular weight of 220.18 g/mol, it falls into the medium-molecular-weight range. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).

CATO manufactures 5-Methoxy-4-oxo-4H-chromene-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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