6-(2,6-Dichlorophenyl)-8-methyl-2-(methylthio)pyrimido[4,5-d]pyridazin-5(6H)-one CAS 1419794-21-0

Description

6-(2,6-Dichlorophenyl)-8-methyl-2-(methylthio)pyrimido[4,5-d]pyridazin-5(6H)-one (CAS 1419794-21-0) is a high-purity analytical reference standard with the molecular formula C14H10Cl2N4OS and a molecular weight of 353.23 g/mol.

Owing to a nitrogen-containing heterocyclic scaffold, an amide group, sulfur-containing functionality, a hydroxyl group, an ether linkage, chlorine substitution, 6-(2,6-Dichlorophenyl)-8-methyl-2-(methylthio)pyrimido[4,5-d]pyridazin-5(6H)-one is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 353.23 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.

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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