3,5-Diphenyl-1-(4-biphenylyl)formazan CAS 21520-85-4

Purity 97%+In StockPharmaceutical Standards
CAS No.21520-85-4
Molecular FormulaC25H20N4
Molecular Weight376.45 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

3,5-Diphenyl-1-(4-biphenylyl)formazan CAS 21520-85-4 chemical structure

Description

As a certified reference material (CRM), 3,5-Diphenyl-1-(4-biphenylyl)formazan 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.

3,5-Diphenyl-1-(4-biphenylyl)formazan (CAS 21520-85-4) is a high-purity analytical reference standard with the molecular formula C25H20N4 and a molecular weight of 376.45 g/mol.

The molecular framework of 3,5-Diphenyl-1-(4-biphenylyl)formazan (C25H20N4) is characterized by a nitrogen-containing heterocyclic scaffold, a nitrile group. 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 aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).

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.

Physical & Chemical Properties

Molecular FormulaC25H20N4
Molecular Weight376.45 g/mol
AppearancePale yellow to yellow crystalline powder
Purity97%+
StorageStore at 2-8°C, protect from light
Solubility (reference)Soluble in DMSO, DMF, methanol
StabilityLight-sensitive; avoid direct strong light
Degree of Unsaturation (DBE)18.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)1963
Nitrogen Atoms4

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