3-[(5-chloro-2,4-dimethoxyphenyl)sulfamoyl]-4-methoxybenzoic acid CAS 721893-22-7

Description

Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including 3-[(5-chloro-2,4-dimethoxyphenyl)sulfamoyl]-4-methoxybenzoic acid.

3-[(5-chloro-2,4-dimethoxyphenyl)sulfamoyl]-4-methoxybenzoic acid (CAS 721893-22-7) is a high-purity analytical reference standard with the molecular formula C16H16ClNO7S and a molecular weight of 401.82 g/mol.

Based on its molecular formula C16H16ClNO7S, 3-[(5-chloro-2,4-dimethoxyphenyl)sulfamoyl]-4-methoxybenzoic acid contains a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage, chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 401.82 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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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