DPPH

Also known as 2,2-diphenyl-1-(2,4,6-trinitrophenyl)hydrazin-1-yl, DPPH radical

DPPH (2,2-diphenyl-1-picrylhydrazyl) is an organic chemical compound. It is a dark-colored crystalline powder composed of stable free radical molecules. DPPH has two major applications, both in laboratory research: one is a monitor of chemical reactions involving radicals, most notably it is a common antioxidant assay, and another is a standard of the position and intensity of electron paramagnetic resonance signals.

Research

34,058 papers

Paper-based DPPH Assay for Antioxidant Activity Analysis.Analytical sciences : the international journal of the Japan Society for Analytical Chemistry · 2018
Genesis and development of DPPH method of antioxidant assay.Journal of food science and technology · 2011
Determination of Antioxidants by DPPH Radical Scavenging Activity and Quantitative Phytochemical Analysis of Ficus religiosa.Molecules (Basel, Switzerland) · 2022
The Chemistry of DPPH(·) Free Radical and Congeners.International journal of molecular sciences · 2021
A kinetic-based stopped-flow DPPH(•) method.Scientific reports · 2023

via PubMed

Wikidata facts

Mass: 395.086583136

Show 3 more facts

canonical SMILES: [O-][N+](=O)C1=CC(=C([N]N(C2=CC=CC=C2)C2=CC=CC=C2)C(=C1)[N+]([O-])=O)[N+]([O-])=O
chemical formula: C₁₈H₁₂N₅O₆
Commons category: DPPH

Sources (2)

via Wikidata · CC0

~3 min read

Article

2 sections

Contents

Properties and applications
References

== Properties and applications == DPPH has several crystalline forms which differ by the lattice symmetry and melting point. The commercial powder is a mixture of phases which melts at ~130 °C. DPPH-I (m.p. 106 °C) is orthorhombic, DPPH-II (m.p. 137 °C) is amorphous and DPPH-III (m.p. 128–129 °C) is triclinic.