N-(1-Ethyl-3,5-dimethyl-1H-pyrazol-4-yl)thiophene-2-carboxamide CAS 514855-99-3

Description

Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including N-(1-Ethyl-3,5-dimethyl-1H-pyrazol-4-yl)thiophene-2-carboxamide.

N-(1-Ethyl-3,5-dimethyl-1H-pyrazol-4-yl)thiophene-2-carboxamide (CAS 514855-99-3), molecular formula C12H15N3OS and molecular weight 249.33 g/mol, is a CATO reference standard with documented purity and traceability.

Owing to a nitrogen-containing heterocyclic scaffold, an amide group, sulfur-containing functionality, a hydroxyl group, an ether linkage, N-(1-Ethyl-3,5-dimethyl-1H-pyrazol-4-yl)thiophene-2-carboxamide is typically off-white to pale yellow low-melting solid. Its solid-state physicochemical attributes — including a molecular weight of 249.33 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.

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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