3-(2,4-Dichloro-5-fluorophenyl)-1-phenyl-1H-pyrazole-5-carboxylic acid CAS 618382-91-5

Purity 97%+In StockPharmaceutical Standards
CAS No.618382-91-5
Molecular FormulaC16H9Cl2FN2O2
Molecular Weight351.16 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

3-(2,4-Dichloro-5-fluorophenyl)-1-phenyl-1H-pyrazole-5-carboxylic acid CAS 618382-91-5 chemical structure

Description

The occurrence of 3-(2,4-Dichloro-5-fluorophenyl)-1-phenyl-1H-pyrazole-5-carboxylic acid is closely related to a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, fluorine/chlorine substitution in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.

3-(2,4-Dichloro-5-fluorophenyl)-1-phenyl-1H-pyrazole-5-carboxylic acid (CAS 618382-91-5) is a high-purity analytical reference standard with the molecular formula C16H9Cl2FN2O2 and a molecular weight of 351.16 g/mol.

Owing to a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, fluorine/chlorine substitution, 3-(2,4-Dichloro-5-fluorophenyl)-1-phenyl-1H-pyrazole-5-carboxylic acid is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 351.16 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.

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.

As a certified reference material (CRM), 3-(2,4-Dichloro-5-fluorophenyl)-1-phenyl-1H-pyrazole-5-carboxylic acid meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.

Physical & Chemical Properties

Molecular FormulaC16H9Cl2FN2O2
Molecular Weight351.16 g/mol
AppearancePale yellow to yellow crystalline powder. (slight halide-like odor, low volatility)
Purity97%+
StorageStore at 2-8°C, protect from light, keep sealed and dry
Solubility (reference)Soluble in DMSO, DMF, methanol
StabilityMay oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions
Degree of Unsaturation (DBE)12.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)1985
Halogen ContentF/Cl-containing
Nitrogen Atoms2

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