3-(5-((4-Chlorobenzyl)thio)-4-ethyl-4H-1,2,4-triazol-3-yl)-1-phenylpyridazin-4(1H)-one CAS 478063-63-7

Description

3-(5-((4-Chlorobenzyl)thio)-4-ethyl-4H-1,2,4-triazol-3-yl)-1-phenylpyridazin-4(1H)-one (CAS 478063-63-7), molecular formula C21H18ClN5OS and molecular weight 423.92 g/mol, is a CATO reference standard with documented purity and traceability.

Based on its molecular formula C21H18ClN5OS, 3-(5-((4-Chlorobenzyl)thio)-4-ethyl-4H-1,2,4-triazol-3-yl)-1-phenylpyridazin-4(1H)-one contains a steroid core, an amide group, sulfur-containing functionality, a hydroxyl group, an ether linkage, chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 423.92 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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.

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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