1-methylpyrazole-4-sulfonyl chloride 288148-34-5 4-(Chlorosulphonyl)-1-methyl-1H-pyrazole CAS 288148-34-5

Description

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.

1-methylpyrazole-4-sulfonyl chloride 288148-34-5 4-(Chlorosulphonyl)-1-methyl-1H-pyrazole (CAS 288148-34-5), molecular formula C3H7ClN2O2S and molecular weight 170.62 g/mol, is a CATO reference standard with documented purity and traceability.

1-methylpyrazole-4-sulfonyl chloride 288148-34-5 4-(Chlorosulphonyl)-1-methyl-1H-pyrazole (C3H7ClN2O2S) contains an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution. It is notably hygroscopic, halogen substitution raises its density and boiling point, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.

CATO manufactures 1-methylpyrazole-4-sulfonyl chloride 288148-34-5 4-(Chlorosulphonyl)-1-methyl-1H-pyrazole under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.

Physical & Chemical Properties

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