4-Chloro-1-methyl-1H-pyrazole-3-carboxylic acid CAS 84547-85-3

Purity 97%+In StockPharmaceutical Standards
CAS No.84547-85-3
Molecular FormulaC5H5ClN2O2
Molecular Weight160.56 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

4-Chloro-1-methyl-1H-pyrazole-3-carboxylic acid CAS 84547-85-3 chemical structure

Description

Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including 4-Chloro-1-methyl-1H-pyrazole-3-carboxylic acid.

4-Chloro-1-methyl-1H-pyrazole-3-carboxylic acid (CAS 84547-85-3), molecular formula C5H5ClN2O2 and molecular weight 160.56 g/mol, is a CATO reference standard with documented purity and traceability.

Based on its molecular formula C5H5ClN2O2, 4-Chloro-1-methyl-1H-pyrazole-3-carboxylic acid contains an amide group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 160.56 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).

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), 4-Chloro-1-methyl-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 FormulaC5H5ClN2O2
Molecular Weight160.56 g/mol
AppearanceOff-white to pale yellow crystalline powder. (slight halide-like odor, faint amine-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)4.0
UV AbsorptionUV-absorbing
CAS Registry Year (est.)1981
Halogen ContentCl-containing
Nitrogen Atoms2

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