3-Ethynyl-5-methyl-1H-pyrazole CAS 21387-41-7

Purity 97%+In StockPharmaceutical Standards
CAS No.21387-41-7
Molecular FormulaC6H6N2
Molecular Weight106.13 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

3-Ethynyl-5-methyl-1H-pyrazole CAS 21387-41-7 chemical structure

Description

3-Ethynyl-5-methyl-1H-pyrazole (CAS 21387-41-7) is a high-purity analytical reference standard with the molecular formula C6H6N2 and a molecular weight of 106.13 g/mol.

3-Ethynyl-5-methyl-1H-pyrazole (C6H6N2) contains a nitrile group, an aromatic ring system. Its physicochemical properties are representative of its class; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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

Molecular FormulaC6H6N2
Molecular Weight106.13 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)5.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)1963
Nitrogen Atoms2

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