5-((3-(4-Chlorophenyl)-1-phenyl-1H-pyrazol-4-yl)methylene)-3-ethyl-2-thioxothiazolidin-4-one CAS 371773-71-6

Description

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.

5-((3-(4-Chlorophenyl)-1-phenyl-1H-pyrazol-4-yl)methylene)-3-ethyl-2-thioxothiazolidin-4-one (CAS 371773-71-6), molecular formula C21H16ClN3OS2 and molecular weight 425.95 g/mol, is a CATO reference standard with documented purity and traceability.

Owing to a steroid core, an amide group, sulfur-containing functionality, a hydroxyl group, an ether linkage, chlorine substitution, 5-((3-(4-Chlorophenyl)-1-phenyl-1H-pyrazol-4-yl)methylene)-3-ethyl-2-thioxothiazolidin-4-one is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 425.95 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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.

Physical & Chemical Properties

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