4-Fluoropyrazole CAS 35277-02-2

Purity 97%+In StockPharmaceutical Standards
CAS No.35277-02-2
Molecular FormulaC3H3FN2
Molecular Weight86.07 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

4-Fluoropyrazole CAS 35277-02-2 chemical structure

Description

Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.

4-Fluoropyrazole (CAS 35277-02-2) is a high-purity analytical reference standard with the molecular formula C3H3FN2 and a molecular weight of 86.07 g/mol.

Owing to a nitrile group, fluorine substitution, 4-Fluoropyrazole is typically white to pale yellow liquid. Its solid-state physicochemical attributes — including a molecular weight of 86.07 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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 FormulaC3H3FN2
Molecular Weight86.07 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)3.0
UV AbsorptionUV-absorbing
CAS Registry Year (est.)1967
Halogen ContentF-containing
Nitrogen Atoms2

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