5-Methylpyrazole-4-sulfonyl Chloride CAS 1179918-36-5

Description

As a certified reference material (CRM), 5-Methylpyrazole-4-sulfonyl Chloride meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.

5-Methylpyrazole-4-sulfonyl Chloride (CAS 1179918-36-5), molecular formula C4H5ClN2O2S and molecular weight 180.61 g/mol, is a CATO reference standard with documented purity and traceability.

5-Methylpyrazole-4-sulfonyl Chloride (C4H5ClN2O2S) 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.

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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