1-(difluoromethyl)-3-ethoxy-pyrazole-4-sulfonyl chloride CAS 1799541-61-9

Description

Compared with other compounds in its class, the molecular weight of 264.68 g/mol gives 1-(difluoromethyl)-3-ethoxy-pyrazole-4-sulfonyl chloride distinctive chromatographic separation conditions and mass-spectrometry parameter settings.

1-(difluoromethyl)-3-ethoxy-pyrazole-4-sulfonyl chloride (CAS 1799541-61-9), molecular formula C6H11ClF2N2O3S and molecular weight 264.68 g/mol, is a CATO reference standard with documented purity and traceability.

The molecular framework of 1-(difluoromethyl)-3-ethoxy-pyrazole-4-sulfonyl chloride (C6H11ClF2N2O3S) is characterized by an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, fluorine/chlorine substitution. 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.

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.

Physical & Chemical Properties

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