Ethyl 3-(chlorosulfonyl)-1H-pyrazole-4-carboxylate CAS 115703-22-5

Description

Compared with other compounds in its class, the molecular weight of 238.65 g/mol gives Ethyl 3-(chlorosulfonyl)-1H-pyrazole-4-carboxylate distinctive chromatographic separation conditions and mass-spectrometry parameter settings.

Ethyl 3-(chlorosulfonyl)-1H-pyrazole-4-carboxylate (CAS 115703-22-5), molecular formula C6H7ClN2O4S and molecular weight 238.65 g/mol, is a CATO reference standard with documented purity and traceability.

The molecular framework of Ethyl 3-(chlorosulfonyl)-1H-pyrazole-4-carboxylate (C6H7ClN2O4S) 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. 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.

As a certified reference material (CRM), Ethyl 3-(chlorosulfonyl)-1H-pyrazole-4-carboxylate 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.

Physical & Chemical Properties

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