4-oxo-1H,4H,7H-pyrazolo[3,4-d]pyrimidine-6-sulfinic acid CAS 125398-30-3

Description

4-oxo-1H,4H,7H-pyrazolo[3,4-d]pyrimidine-6-sulfinic acid (CAS 125398-30-3), molecular formula C5H4N4O3S and molecular weight 200.18 g/mol, is a CATO reference standard with documented purity and traceability.

The molecular framework of 4-oxo-1H,4H,7H-pyrazolo[3,4-d]pyrimidine-6-sulfinic acid (C5H4N4O3S) is characterized by an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. 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

Why CATO?

• ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
• 130,000+ catalog items in stock, COA supplied with every batch
• Worldwide shipping with full export documentation (HS code guidance available)
• Technical support: +86 18665070610 / Nicole.chen@cato-chem.com