2-Chloro-5,6-dihydrobenzothiophen-7(4H)-one CAS 19945-37-0

Description

Compared with other compounds in its class, the molecular weight of 186.66 g/mol gives 2-Chloro-5,6-dihydrobenzothiophen-7(4H)-one distinctive chromatographic separation conditions and mass-spectrometry parameter settings.

2-Chloro-5,6-dihydrobenzothiophen-7(4H)-one (CAS 19945-37-0), molecular formula C8H7ClOS and molecular weight 186.66 g/mol, is a CATO reference standard with documented purity and traceability.

Owing to sulfur-containing functionality, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system, 2-Chloro-5,6-dihydrobenzothiophen-7(4H)-one is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 186.66 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.

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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