4-fluoro-2-oxo-3H-1,3-benzoxazole-5-sulfonyl chloride CAS 2387598-65-2

Description

The occurrence of 4-fluoro-2-oxo-3H-1,3-benzoxazole-5-sulfonyl chloride is closely related to an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, fluorine/chlorine substitution in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.

4-fluoro-2-oxo-3H-1,3-benzoxazole-5-sulfonyl chloride (CAS 2387598-65-2) is a high-purity analytical reference standard with the molecular formula C7H9ClFNO4S and a molecular weight of 257.67 g/mol.

Owing to an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, fluorine/chlorine substitution, 4-fluoro-2-oxo-3H-1,3-benzoxazole-5-sulfonyl chloride is typically white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 257.67 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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).

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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