1-[(2-chlorophenyl)methyl]-1h-pyrazole-4-carboxylic acid CAS 877977-33-8

Purity 97%+In StockPharmaceutical Standards
CAS No.877977-33-8
Molecular FormulaC11H9ClN2O2
Molecular Weight236.65 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

1-[(2-chlorophenyl)methyl]-1h-pyrazole-4-carboxylic acid CAS 877977-33-8 chemical structure

Description

The molecular framework of 1-[(2-chlorophenyl)methyl]-1h-pyrazole-4-carboxylic acid (C11H9ClN2O2) is characterized by a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, chlorine substitution. In reversed-phase chromatography, its retention is governed primarily by its high hydrophobicity (logP), which provides a practical basis for HPLC-UV/DAD or LC-MS method development. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.

CATO supplies 1-[(2-chlorophenyl)methyl]-1h-pyrazole-4-carboxylic acid (CAS 877977-33-8), a certified reference material (molecular formula C11H9ClN2O2, MW 236.65 g/mol) for analytical method development and quality control.

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), 1-[(2-chlorophenyl)methyl]-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 FormulaC11H9ClN2O2
Molecular Weight236.65 g/mol
AppearancePale yellow to yellow crystalline powder. (slight halide-like odor)
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 ContentCl-containing
Nitrogen Atoms2

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