(1-Methyl-1h-pyrazol-4-yl)thiourea CAS 1154267-67-0

Purity 97%+In StockPharmaceutical Standards
CAS No.1154267-67-0
Molecular FormulaC5H8N4S
Molecular Weight156.21 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

(1-Methyl-1h-pyrazol-4-yl)thiourea CAS 1154267-67-0 chemical structure

Description

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.

CATO supplies (1-Methyl-1h-pyrazol-4-yl)thiourea (CAS 1154267-67-0), a certified reference material (molecular formula C5H8N4S, MW 156.21 g/mol) for analytical method development and quality control.

The molecular framework of (1-Methyl-1h-pyrazol-4-yl)thiourea (C5H8N4S) is characterized by a nitrile group, sulfur-containing functionality. 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. 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.

Physical & Chemical Properties

Molecular FormulaC5H8N4S
Molecular Weight156.21 g/mol
Purity97%+
StorageStore at 2-8°C, protect from light
Solubility (reference)Soluble in DMSO, DMF, methanol
StabilityLight-sensitive; avoid direct strong light
Degree of Unsaturation (DBE)4.0
UV AbsorptionUV-absorbing
CAS Registry Year (est.)1989
Nitrogen Atoms4
Sulfur Atoms1

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