6,7-dimethoxy-1H-isochromene-1,3(4H)-dione CAS 5653-42-9

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.

6,7-dimethoxy-1H-isochromene-1,3(4H)-dione (CAS 5653-42-9), molecular formula C11H10O5 and molecular weight 222.19 g/mol, is a CATO reference standard with documented purity and traceability.

Structurally, 6,7-dimethoxy-1H-isochromene-1,3(4H)-dione (C11H10O5) contains a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. The molecule exhibits a degree of unsaturation (DBE) of 7.0, corresponding to approximately 7 ring(s) or double-bond equivalent(s). With a molecular weight of 222.19 g/mol, it falls into the medium-molecular-weight range. 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).

As a certified reference material (CRM), 6,7-dimethoxy-1H-isochromene-1,3(4H)-dione 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.

Physical & Chemical Properties

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