5-Chloro-1,2-diethyl-1H-pyrazol-3(2H)-one CAS 916146-91-3

Description

The occurrence of 5-Chloro-1,2-diethyl-1H-pyrazol-3(2H)-one is closely related to an amide group, a hydroxyl group, an ether linkage, chlorine substitution in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.

5-Chloro-1,2-diethyl-1H-pyrazol-3(2H)-one (CAS 916146-91-3) is a high-purity analytical reference standard with the molecular formula C7H11ClN2O and a molecular weight of 174.63 g/mol.

Owing to an amide group, a hydroxyl group, an ether linkage, chlorine substitution, 5-Chloro-1,2-diethyl-1H-pyrazol-3(2H)-one is typically white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 174.63 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.

CATO manufactures 5-Chloro-1,2-diethyl-1H-pyrazol-3(2H)-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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