7-Chloro-1-oxo-3,4-dihydro-1h-2-benzopyran-3-carboxylic acid CAS 890646-72-7

Description

The occurrence of 7-Chloro-1-oxo-3,4-dihydro-1h-2-benzopyran-3-carboxylic acid is closely related to a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.

7-Chloro-1-oxo-3,4-dihydro-1h-2-benzopyran-3-carboxylic acid (CAS 890646-72-7), molecular formula C10H7ClO4 and molecular weight 226.61 g/mol, is a CATO reference standard with documented purity and traceability.

Owing to a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system, 7-Chloro-1-oxo-3,4-dihydro-1h-2-benzopyran-3-carboxylic acid is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 226.61 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.

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.

As a certified reference material (CRM), 7-Chloro-1-oxo-3,4-dihydro-1h-2-benzopyran-3-carboxylic acid 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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