1-Ethyl-3,5-dimethyl-1H-pyrazolo[4,3-d]pyrimidin-7(4H)-one CAS 89239-59-8

Description

Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including 1-Ethyl-3,5-dimethyl-1H-pyrazolo[4,3-d]pyrimidin-7(4H)-one.

CATO supplies 1-Ethyl-3,5-dimethyl-1H-pyrazolo[4,3-d]pyrimidin-7(4H)-one (CAS 89239-59-8), a certified reference material (molecular formula C9H12N4O, MW 192.22 g/mol) for analytical method development and quality control.

Structurally, 1-Ethyl-3,5-dimethyl-1H-pyrazolo[4,3-d]pyrimidin-7(4H)-one (C9H12N4O) contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 6.0, corresponding to approximately 6 ring(s) or double-bond equivalent(s). With a molecular weight of 192.22 g/mol, it falls into the medium-molecular-weight range. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).

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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