6-Mercapto-1-phenyl-1,5-dihydro-4H-pyrazolo[3,4-d]pyrimidin-4-one CAS 156718-77-3

Description

6-Mercapto-1-phenyl-1,5-dihydro-4H-pyrazolo[3,4-d]pyrimidin-4-one (CAS 156718-77-3), molecular formula C11H8N4OS and molecular weight 244.27 g/mol, is a CATO reference standard with documented purity and traceability.

Structurally, 6-Mercapto-1-phenyl-1,5-dihydro-4H-pyrazolo[3,4-d]pyrimidin-4-one (C11H8N4OS) contains a nitrogen-containing heterocyclic scaffold, an amide group, sulfur-containing functionality, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 10.0, corresponding to approximately 10 ring(s) or double-bond equivalent(s). With a molecular weight of 244.27 g/mol, it falls into the medium-molecular-weight range. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).

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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