DPPH

DPPH
Names
	Preferred IUPAC name 2,2-Diphenyl-1-(2,4,6-trinitrophenyl)hydrazin-1-yl
	Other names 2,2-Diphenyl-1-picrylhydrazyl; 1,1-Diphenyl-2-picrylhydrazyl radical; 2,2-Diphenyl-1-(2,4,6-trinitrophenyl)hydrazyl; Diphenylpicrylhydrazyl
Identifiers
CAS Number	1898-66-4 ;
3D model (JSmol)	Interactive image;
Abbreviations	DPPH
ChemSpider	2016757 ;
ECHA InfoCard	100.015.993
PubChem CID	74358;
UNII	DFD3H4VGDH ;
CompTox Dashboard (EPA)	DTXSID8061896 ;
	InChI InChI=1S/C18H12N5O6/c24-21(25)15-11-16(22(26)27)18(17(12-15)23(28)29)19-20(13-7-3-1-4-8-13)14-9-5-2-6-10-14/h1-12H Key: HHEAADYXPMHMCT-UHFFFAOYSA-N ; InChI=1/C18H13N5O6/c24-21(25)15-11-16(22(26)27)18(17(12-15)23(28)29)19-20(13-7-3-1-4-8-13)14-9-5-2-6-10-14/h1-12,19H Key: WCBPJVKVIMMEQC-UHFFFAOYAG; InChI=1/C18H12N5O6/c24-21(25)15-11-16(22(26)27)18(17(12-15)23(28)29)19-20(13-7-3-1-4-8-13)14-9-5-2-6-10-14/h1-12H Key: HHEAADYXPMHMCT-UHFFFAOYAG;
	SMILES c1ccc(cc1)N(c2ccccc2)[N]c3c(cc(cc3[N+](=O)[O-])[N+](=O)[O-])[N+](=O)[O-];
Properties
Chemical formula	C18H12N5O6
Molar mass	394.323 g·mol−1
Appearance	Black to green powder, purple in solution
Density	1.4 g/cm3
Melting point	135 °C (275 °F; 408 K) (decomposes)
Solubility in water	insoluble
Solubility in methanol	10 mg/mL
Hazards
NFPA 704 (fire diamond)	0 1 0
Safety data sheet (SDS)	MSDS
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

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.