3,5-dimethyl-4-oxo-3H,4H-thieno[2,3-d]pyrimidine-6-carboxylic acid CAS 439138-78-0

Description

Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including 3,5-dimethyl-4-oxo-3H,4H-thieno[2,3-d]pyrimidine-6-carboxylic acid.

CATO supplies 3,5-dimethyl-4-oxo-3H,4H-thieno[2,3-d]pyrimidine-6-carboxylic acid (CAS 439138-78-0), a certified reference material (molecular formula C9H14N2O3S, MW 230.28 g/mol) for analytical method development and quality control.

Structurally, 3,5-dimethyl-4-oxo-3H,4H-thieno[2,3-d]pyrimidine-6-carboxylic acid (C9H14N2O3S) contains a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 4.0, corresponding to approximately 4 ring(s) or double-bond equivalent(s). With a molecular weight of 230.28 g/mol, it falls into the medium-molecular-weight range. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.

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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