(4Z)-1-(4-Chlorophenyl)-4-{[(3,4-dimethylphenyl)amino]methylidene}-3-ethoxy-4,5-dihydro-1H-pyrazol-5-one CAS 338751-05-6

Description

(4Z)-1-(4-Chlorophenyl)-4-{[(3,4-dimethylphenyl)amino]methylidene}-3-ethoxy-4,5-dihydro-1H-pyrazol-5-one (CAS 338751-05-6), molecular formula C20H20ClN3O2 and molecular weight 369.84 g/mol, is a CATO reference standard with documented purity and traceability.

Based on its molecular formula C20H20ClN3O2, (4Z)-1-(4-Chlorophenyl)-4-{[(3,4-dimethylphenyl)amino]methylidene}-3-ethoxy-4,5-dihydro-1H-pyrazol-5-one contains a steroid core, an amide group, a hydroxyl group, an ether linkage, chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 369.84 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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.

CATO manufactures (4Z)-1-(4-Chlorophenyl)-4-{[(3,4-dimethylphenyl)amino]methylidene}-3-ethoxy-4,5-dihydro-1H-pyrazol-5-one under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.

Physical & Chemical Properties

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