Ethyl 3-amino-5-(methylthio)-1H-pyrazole-4-carboxylate CAS 59541-46-7

Description

Compared with other compounds in its class, the molecular weight of 201.25 g/mol gives Ethyl 3-amino-5-(methylthio)-1H-pyrazole-4-carboxylate distinctive chromatographic separation conditions and mass-spectrometry parameter settings.

Ethyl 3-amino-5-(methylthio)-1H-pyrazole-4-carboxylate (CAS 59541-46-7), molecular formula C7H11N3O2S and molecular weight 201.25 g/mol, is a CATO reference standard with documented purity and traceability.

Owing to an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system, Ethyl 3-amino-5-(methylthio)-1H-pyrazole-4-carboxylate is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 201.25 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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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