5-Ethyl-3-(thiophen-3-yl)-1H-pyrazol-4-amine CAS 1257877-25-0

Description

Compared with other compounds in its class, the molecular weight of 193.27 g/mol gives 5-Ethyl-3-(thiophen-3-yl)-1H-pyrazol-4-amine distinctive chromatographic separation conditions and mass-spectrometry parameter settings.

CATO supplies 5-Ethyl-3-(thiophen-3-yl)-1H-pyrazol-4-amine (CAS 1257877-25-0), a certified reference material (molecular formula C9H11N3S, MW 193.27 g/mol) for analytical method development and quality control.

Based on its molecular formula C9H11N3S, 5-Ethyl-3-(thiophen-3-yl)-1H-pyrazol-4-amine contains a nitrogen-containing heterocyclic scaffold, a nitrile group, sulfur-containing functionality; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 193.27 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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

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