Pyrimido[5,4-c]pyridazin-8(5H)-one CAS 21147-71-7

Description

The occurrence of Pyrimido[5,4-c]pyridazin-8(5H)-one is closely related to an amide group, a hydroxyl group, an ether linkage, an aromatic ring system in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.

Pyrimido[5,4-c]pyridazin-8(5H)-one (CAS 21147-71-7), molecular formula C6H4N4O and molecular weight 148.12 g/mol, is a CATO reference standard with documented purity and traceability.

Owing to an amide group, a hydroxyl group, an ether linkage, an aromatic ring system, Pyrimido[5,4-c]pyridazin-8(5H)-one is typically off-white to pale yellow liquid. Its solid-state physicochemical attributes — including a molecular weight of 148.12 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.

Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.

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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