4-Chloro-1-ethyl-3-methyl-1h-pyrazole-5-sulfonyl chloride CAS 1245823-91-9

Description

CATO manufactures 4-Chloro-1-ethyl-3-methyl-1h-pyrazole-5-sulfonyl chloride 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.

4-Chloro-1-ethyl-3-methyl-1h-pyrazole-5-sulfonyl chloride (CAS 1245823-91-9), molecular formula C6H8Cl2N2O2S and molecular weight 243.11 g/mol, is a CATO reference standard with documented purity and traceability.

Owing to an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, 4-Chloro-1-ethyl-3-methyl-1h-pyrazole-5-sulfonyl chloride is typically white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 243.11 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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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