4-hydroxy-2-methyl-5-nitrobenzene-1-sulfonyl chloride CAS 1423025-92-6

Description

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.

4-hydroxy-2-methyl-5-nitrobenzene-1-sulfonyl chloride (CAS 1423025-92-6), molecular formula C7H6ClNO5S and molecular weight 251.64 g/mol, is a CATO reference standard with documented purity and traceability.

The molecular framework of 4-hydroxy-2-methyl-5-nitrobenzene-1-sulfonyl chloride (C7H6ClNO5S) is characterized by an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.

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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