3,5-Bis(4-fluorophenyl)-4-methyl-1h-pyrazole CAS 1159939-59-9

Purity 97%+In StockPharmaceutical Standards
CAS No.1159939-59-9
Molecular FormulaC16H12F2N2
Molecular Weight270.28 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

3,5-Bis(4-fluorophenyl)-4-methyl-1h-pyrazole CAS 1159939-59-9 chemical structure

Description

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.

CATO supplies 3,5-Bis(4-fluorophenyl)-4-methyl-1h-pyrazole (CAS 1159939-59-9), a certified reference material (molecular formula C16H12F2N2, MW 270.28 g/mol) for analytical method development and quality control.

Structurally, 3,5-Bis(4-fluorophenyl)-4-methyl-1h-pyrazole (C16H12F2N2) contains a nitrogen-containing heterocyclic scaffold, a nitrile group, fluorine substitution. The molecule exhibits a degree of unsaturation (DBE) of 11.0, corresponding to approximately 11 ring(s) or double-bond equivalent(s). With a molecular weight of 270.28 g/mol, it falls into the medium-molecular-weight range. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.

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 FormulaC16H12F2N2
Molecular Weight270.28 g/mol
Purity97%+
StorageStore at 2-8°C, protect from light, keep tightly closed to prevent evaporation
Solubility (reference)Soluble in DMSO, DMF, methanol
StabilityMay oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light
Degree of Unsaturation (DBE)11.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)1989
Halogen ContentF-containing
Nitrogen Atoms2

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