5-(4-Chlorophenyl)-1-(3,4-dichlorophenyl)-1H-pyrazole-3-carboxylic acid CAS 158941-10-7

Purity 97%+In StockPharmaceutical Standards
CAS No.158941-10-7
Molecular FormulaC16H9Cl3N2O2
Molecular Weight367.61 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

5-(4-Chlorophenyl)-1-(3,4-dichlorophenyl)-1H-pyrazole-3-carboxylic acid CAS 158941-10-7 chemical structure

Description

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

5-(4-Chlorophenyl)-1-(3,4-dichlorophenyl)-1H-pyrazole-3-carboxylic acid (CAS 158941-10-7), molecular formula C16H9Cl3N2O2 and molecular weight 367.61 g/mol, is a CATO reference standard with documented purity and traceability.

Based on its molecular formula C16H9Cl3N2O2, 5-(4-Chlorophenyl)-1-(3,4-dichlorophenyl)-1H-pyrazole-3-carboxylic acid contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 367.61 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-(4-Chlorophenyl)-1-(3,4-dichlorophenyl)-1H-pyrazole-3-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 FormulaC16H9Cl3N2O2
Molecular Weight367.61 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.)2002
Halogen ContentCl-containing
Nitrogen Atoms2

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