2-Oxobenzo[d][1,3]oxathiol-5-yl 3-chlorobenzoate CAS 321974-22-5

Description

As a certified reference material (CRM), 2-Oxobenzo[d][1,3]oxathiol-5-yl 3-chlorobenzoate 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.

2-Oxobenzo[d][1,3]oxathiol-5-yl 3-chlorobenzoate (CAS 321974-22-5), molecular formula C14H7ClO4S and molecular weight 306.72 g/mol, is a CATO reference standard with documented purity and traceability.

Owing to a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, a polycyclic aromatic system, 2-Oxobenzo[d][1,3]oxathiol-5-yl 3-chlorobenzoate is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 306.72 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.

Physical & Chemical Properties

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