4-(4-Chlorophenyl)-3-methyl-1-(3-nitrophenyl)-1H-pyrazol-5-amine CAS 321385-91-5

Purity 97%+In StockPharmaceutical Standards
CAS No.321385-91-5
Molecular FormulaC16H13ClN4O2
Molecular Weight328.75 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

4-(4-Chlorophenyl)-3-methyl-1-(3-nitrophenyl)-1H-pyrazol-5-amine CAS 321385-91-5 chemical structure

Description

The occurrence of 4-(4-Chlorophenyl)-3-methyl-1-(3-nitrophenyl)-1H-pyrazol-5-amine 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.

CATO supplies 4-(4-Chlorophenyl)-3-methyl-1-(3-nitrophenyl)-1H-pyrazol-5-amine (CAS 321385-91-5), a certified reference material (molecular formula C16H13ClN4O2, MW 328.75 g/mol) for analytical method development and quality control.

The molecular framework of 4-(4-Chlorophenyl)-3-methyl-1-(3-nitrophenyl)-1H-pyrazol-5-amine (C16H13ClN4O2) 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 the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. 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), 4-(4-Chlorophenyl)-3-methyl-1-(3-nitrophenyl)-1H-pyrazol-5-amine 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 FormulaC16H13ClN4O2
Molecular Weight328.75 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
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.)2025
Halogen ContentCl-containing
Nitrogen Atoms4

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