5-Amino-1-(2,4-difluorophenyl)-1h-pyrazole-4-carboxylic acid CAS 918405-21-7

Purity 97%+In StockPharmaceutical Standards
CAS No.918405-21-7
Molecular FormulaC10H7F2N3O2
Molecular Weight239.18 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

5-Amino-1-(2,4-difluorophenyl)-1h-pyrazole-4-carboxylic acid CAS 918405-21-7 chemical structure

Description

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

5-Amino-1-(2,4-difluorophenyl)-1h-pyrazole-4-carboxylic acid (CAS 918405-21-7), molecular formula C10H7F2N3O2 and molecular weight 239.18 g/mol, is a CATO reference standard with documented purity and traceability.

Based on its molecular formula C10H7F2N3O2, 5-Amino-1-(2,4-difluorophenyl)-1h-pyrazole-4-carboxylic acid contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, fluorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 239.18 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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.

As a certified reference material (CRM), 5-Amino-1-(2,4-difluorophenyl)-1h-pyrazole-4-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 FormulaC10H7F2N3O2
Molecular Weight239.18 g/mol
AppearancePale yellow to yellow crystalline powder. (slight halide-like odor, faint amine-like odor, low volatility)
Purity97%+
StorageStore at 2-8°C, protect from light, keep sealed and dry, 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; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions
Degree of Unsaturation (DBE)8.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)1987
Halogen ContentF-containing
Nitrogen Atoms3

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