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2,2-diphenyl-1-picrylhydrazyl

2,2-diphenyl-1-picrylhydrazyl Structure
2,2-diphenyl-1-picrylhydrazyl structure
CAS No.
1898-66-4
Chemical Name:
2,2-diphenyl-1-picrylhydrazyl
Synonyms
DPPH;1,1-DIPHENYL-2-PICRYLHYDRAZYL;1,1-Diphenyl-2-picrylhydrazyl radical;2,2-Diphenylpicrylhydrazyl;2,2-Diphenyl-1-picrylhydrazyl radical（DPPH）;hydrazyL;-1-picryL;DPPH, 10 mM in DMSO;Diphenypicrylhydrazyl;inhibit,DPPH,Inhibitor
CBNumber:
CB8753025
Molecular Formula:
C18H12N5O6
Molecular Weight:
394.32
MDL Number:
MFCD00007231
MOL File:
1898-66-4.mol
MSDS File:
SDS
TDS File:
TDS
Last updated:2026-07-16 07:06:08
Product description Number Pack Size Price
2,2-Diphenyl-1-picrylhydrazyl D9132 1g $151
2,2-Diphenyl-1-picrylhydrazyl D9132 5g $477
1,1-Diphenyl-2-picrylhydrazyl Free Radical >97.0%(HPLC) D4313 1g $86
1,1-Diphenyl-2-picrylhydrazyl Free Radical >97.0%(HPLC) D4313 5g $282
DPPH ≥95% 14805 50mg $50
More product size
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2,2-diphenyl-1-picrylhydrazyl Properties

Melting point ~135 °C (dec.)(lit.)
Density 1.484 g/cm3
storage temp. 2-8°C
solubility Acetonitrile (Slightly), Chloroform (Slightly), DMSO (Slightly)
form Solid
pka 8.59
color green
Water Solubility Soluble in dimethyl formamide, ethanol, chloroform, ether, carbon disulfinde, acetone, oils, carbon tetrachloride, glacial acetic acid and toluene. Insoluble in water.
λmax 515nm(MeOH)(lit.)
Merck 14,3330
BRN 1846081
Stability Shock Sensitive
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
InChIKey HHEAADYXPMHMCT-UHFFFAOYSA-N
SMILES C1([N]N(C2C=CC=CC=2)C2C=CC=CC=2)C([N+]([O-])=O)=CC([N+]([O-])=O)=CC=1[N+]([O-])=O |^1:1|
FDA UNII DFD3H4VGDH
EPA Substance Registry System Hydrazyl, 2,2-diphenyl-1-(2,4,6-trinitrophenyl)- (1898-66-4)
UNSPSC Code 12352200
NACRES NA.51

SAFETY

Risk and Safety Statements

Symbol(GHS)  Flame (GHS02)Exclamation Mark (GHS07)Health Hazard (GHS08)
GHS02,GHS07,GHS08
Signal word  Danger
Hazard statements  H242-H302+H312+H332-H315-H317-H319-H334
Precautionary statements  P210-P235-P280-P304+P340+P312-P370+P378-P403
Hazard Codes  Xn
Risk Statements  42/43
Safety Statements  22-36/37-45
RIDADR  UN2811
WGK Germany  1
RTECS  MW3250000
TSCA  TSCA listed
HazardClass  6.1
PackingGroup  II
HS Code  29280000
Storage Class 4.1A - Other explosive hazardous materials
Hazard Classifications Acute Tox. 4 Dermal
Acute Tox. 4 Inhalation
Acute Tox. 4 Oral
Eye Irrit. 2
Resp. Sens. 1
Self-react. C
Skin Irrit. 2
Skin Sens. 1
NFPA 704
0
2 0

2,2-diphenyl-1-picrylhydrazyl price More Price(38)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich D9132 2,2-Diphenyl-1-picrylhydrazyl 1898-66-4 1g $151 2026-04-30 Buy
Sigma-Aldrich D9132 2,2-Diphenyl-1-picrylhydrazyl 1898-66-4 5g $477 2026-04-30 Buy
TCI Chemical D4313 1,1-Diphenyl-2-picrylhydrazyl Free Radical >97.0%(HPLC) 1898-66-4 1g $86 2026-04-30 Buy
TCI Chemical D4313 1,1-Diphenyl-2-picrylhydrazyl Free Radical >97.0%(HPLC) 1898-66-4 5g $282 2026-04-30 Buy
Cayman Chemical 14805 DPPH ≥95% 1898-66-4 50mg $50 2026-04-30 Buy
Product number Packaging Price Buy
D9132 1g $151 Buy
D9132 5g $477 Buy
D4313 1g $86 Buy
D4313 5g $282 Buy
14805 50mg $50 Buy

2,2-diphenyl-1-picrylhydrazyl Chemical Properties,Uses,Production

Chemical Properties

DPPH is a common abbreviation for the organic chemical compound 2,2-diphenyl-1-picrylhydrazyl. 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.

Physical properties

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.

Uses

2,2-Diphenyl-1-picrylhydrazyl is used as a sensitive colorimetric free radical scavenger. It serves as a general antioxidant detector. It is utilized to monitor chemical reactions involving radicals as well as a standard of the position and intensity of electron paramagnetic resonance signals. Further, it is employed in the quantitative determination of aliphatic and aromatic thiols by indirect spectroscopy and for photometric determination of tocopherol.

General Description

2,2-diphenyl-1-picrylhydrazyl is a free radical, which shows hydrogen acceptor ability towards antioxidants. It has a strong absorbance at 517 nm. When the radical is lost in exchange for a proton, the absorbance at 517 nm decreases proportionately, resulting in a color change from purple to yellow. Hence, it is commonly used in DPPH assay for measuring the antioxidant activity of different natural samples such as wine, fruits, herbal tea etc.

Biological Activity

Cell permeable: yes', 'Primary Target
Hydrogen radical scavenger', 'Product does not compete with ATP.

Safety

This picrylhydrazyl derivative, also known as DPPH free radical, presents as a black crystalline powder. Store in a refrigerator - this substance is heat sensitive. 1,1-Diphenyl-2-picrylhydrazyl Free Radical is incompatible with oxidizing agents, strong bases and halogens. This chemical is harmful if swallowed. It may cause allergy or asthma symptoms or breathing difficulties if inhaled and an allergic reaction on the skin.

References

[1] SIDDARTHA BALIYAN. Determination of Antioxidants by DPPH Radical Scavenging Activity and Quantitative Phytochemical Analysis of Ficus religiosa.[J]. Molecules, 2022. DOI:10.3390/molecules27041326.
[2] G. CLARKE. High Correlation of 2,2-diphenyl-1-picrylhydrazyl (DPPH) Radical Scavenging, Ferric Reducing Activity Potential and Total Phenolics Content Indicates Redundancy in Use of All Three Assays to Screen for Antioxidant Activity of Extracts of Plants from the Malaysian Rainforest[C]//2 1. 2013: 1-10. DOI:10.3390/antiox2010001.
[3] IKUO NAKANISHI Yoshimi S. Electrochemical redox behavior of 2,2-diphenyl-1-picrylhydrazyl radical solubilized by β-cyclodextrin in water[J]. Electrochemistry Communications, 2022, 134: Article 107190. DOI:10.1016/j.elecom.2021.107190.
[4] JAMES BYH BEHRENDORFF. 2,2-Diphenyl-1-picrylhydrazyl as a screening tool for recombinant monoterpene biosynthesis.[J]. Microbial Cell Factories, 2013, 12: 76. DOI:10.1186/1475-2859-12-76.
[5] J. XIE K. M S. Re-evaluation of the 2,2-Diphenyl-1-picrylhydrazyl Free Radical (DPPH) Assay for Antioxidant Activity[J]. Journal of Agricultural and Food Chemistry, 2014, 62 19: 4251-4260. DOI:10.1021/jf500180u.

2,2-diphenyl-1-picrylhydrazyl Preparation Products And Raw materials

Raw materials

PICRIC ACID Nitrogen Ethanol Phosphorus oxitrichloride Chloroform
Sodium nitrite Diethyl ether Benzene Sodium bicarbonate Thiourea dioxide
Diphenylamine Acetic acid Methanol Sodium hydroxide Pyridine
Magnesium sulfate Lead dioxide Petroleum ether

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Preparation Products

2,2-diphenyl-1-picrylhydrazyl Suppliers

Global( 352)Suppliers
Supplier Tel Email Country ProdList Advantage
Henan Tianfu Chemical Co.,Ltd. 		+86-0371-55170693 +86-19937530512 info@tianfuchem.com China 21533 55
SHANDONG ZHI SHANG CHEMICAL CO.LTD 		0531-68652808 18953170293 sales@sdzschem.com China 2921 58
BOC Sciences 		+1-631-485-4226 inquiry@bocsci.com United States 19935 58
career henan chemical co 		+86-0371-86658258 factory@coreychem.com China 29780 58
Shaanxi Dideu Medichem Co. Ltd 		+86-29-87569266 +86-17392581500 1015@dideu.com China 3861 58
TargetMol Chemicals Inc. 		+1-781-999-5354; +1-00000000000 marketing@targetmol.com United States 32431 58
Hefei Hangang Pharmaceutical Technology Co., Ltd. 		+8618062405514 ada@ipurechemical.com China 10224 58
Hefei TNJ Chemical Industry Co.,Ltd. 		+86-0551-65418671 +86-189 4982 3763 sales@tnjchem.com China 34526 58
Dideu Industries Group Limited 		+8617392712697 1022@dideu.com China 29095 58
Wuhan Fortuna Chemical Co., Ltd 		+86-27-59207850 info@fortunachem.com China 5998 58
Supplier Advantage
Henan Tianfu Chemical Co.,Ltd. 		55
SHANDONG ZHI SHANG CHEMICAL CO.LTD 		58
BOC Sciences 		58
career henan chemical co 		58
Shaanxi Dideu Medichem Co. Ltd 		58
TargetMol Chemicals Inc. 		58
Hefei Hangang Pharmaceutical Technology Co., Ltd. 		58
Hefei TNJ Chemical Industry Co.,Ltd. 		58
Dideu Industries Group Limited 		58
Wuhan Fortuna Chemical Co., Ltd 		58

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View Lastest Price from 2,2-diphenyl-1-picrylhydrazyl manufacturers

Image Update time Product Price Min. Order Purity Supply Ability Manufacturer
2,2-Diphenyl-1-picrylhydrazyl (free radical) pictures 2026-08-24 2,2-Diphenyl-1-picrylhydrazyl (free radical)
1898-66-4
 $1.00 1g 99.0%-100.00% 2kg/month WUHAN FORTUNA CHEMICAL CO., LTD
DPPH pictures 2026-08-08 DPPH
1898-66-4
 $30.00-62.00 99.91% 10g TargetMol Chemicals Inc.
DPPH pictures 2026-08-08 DPPH
1898-66-4
 $30.00-62.00 99.91% 10g TargetMol Chemicals Inc.
  • DPPH pictures
  • DPPH
    1898-66-4
  • $30.00-62.00
  • 99.91%
  • TargetMol Chemicals Inc.
  • DPPH pictures
  • DPPH
    1898-66-4
  • $30.00-62.00
  • 99.91%
  • TargetMol Chemicals Inc.

2,2-diphenyl-1-picrylhydrazyl Spectrum

2,2-DIPHENYL-1-PICRYLHYDRAZYL(1898-66-4)13CNMR2,2-DIPHENYL-1-PICRYLHYDRAZYL(1898-66-4)IR12,2-DIPHENYL-1-PICRYLHYDRAZYL(1898-66-4)IR22,2-DIPHENYL-1-PICRYLHYDRAZYL(1898-66-4)ESR

1898-66-4(2,2-diphenyl-1-picrylhydrazyl)Related Search:

4-Nitro-o-phenylenediamine 1,1-DIPHENYL-2-PICRYLHYDRAZINE 1,2-Diamino-3-nitrobenzene 2,2-diphenyl-1-picrylhydrazyl 3,5-DINITROANILINE
1,1-DIPHENYLHYDRAZINE 2,2-Di(4-tert-octylphenyl)-1-picrylhydrazyl, free radical 2,6-Dinitroaniline 1,2-Diphenylhydrazine Diphenylamine
2-Nitrophenylhydrazine 1,3,5-TRINITROBENZENE 2,4,6-TRINITROANILINE 4-Nitrophenylhydrazine 2,4-Dinitroaniline
2,4-Dinitrophenylhydrazine 1,4-Diamino-2-nitrobenzene 3,5-DIAMINONITROBENZENE

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2,2-Diphenylpicrylhydrazyl 2,2-Diphenyl-1-picrylhydrazyl,1,1-Diphenyl-2-picrylhydrazyl radical, 2,2-Diphenyl-1-(2,4,6-trinitrophenyl)hydrazyl, DPPH 1-diphenyl-2-picrylhydrazyl 1,1-Diphenyl-2-picrylhydrazyl (DPPH) 2,2-Diphenyl-1-(2,4,6-trinitrophenyl)-hydrazyl (DPPH) 1,1-Diphenyl-2-picrylhydrazyl radical, 2,2-Diphenyl-1-(2,4,6-trinitrophenyl)hydrazyl, DPPH 1,1-Diphenyl-2-picrylhydrazyl Free Radical (contains 10-20% Benzene) [1-(2,4,6-Trinitrophenyl)-2,2-diphenylhydrazino]radical 2,2-Diphenyl-1-(2,4,6-trinitrophenyl)hydrazino radical Diphenypicrylhydrazyl 2,2-diphenyl-1-(2,4,6-trinitrophenyl)-hydrazy -1-picryL hydrazyL 2,2-diphenyl-1-(2,4,6-trinitrophenyl)hydrazyl diphenylpicrylhydrazylfreeradical 2,2-Diphenyl-1-picrylhydrazyl(DPPH) 2,2-Diphenyl-1-picrylhydrazyl (contains 10-20% Benzene) 2,2-DIPHENYL-1-PICRYLHYDRAZYL 1,1-Diphenyl-2-picrylhydrazyl radical Diphenylpicrylhydrazyl. "2,2-DIPHENYL-1-PICRYLHYDRAZYL,FREE RADICAL, 95% 1,1-Diphenyl-2-picrylhydrazylFreeRadical> 1,1-Diphenyl-2-picrylhydrazyl (DPPH),≥97% 2,2-Diphenyl-1-(2,4,6-trinitrophenyl)hydrazinyl Free Radical DPPH permeates stable free radicals in cells 2,2-Diphenyl-1-picrylhydrazyl radical（DPPH） 2,2-Diphenyl-1-Picrylhydrazyl (DPPH) extrapure, 95% inhibit,DPPH,Inhibitor 1,1-Diphenyl-2-picrylhydrazyl Free Radical(contains 10-20% Benzene), ≥ 97.0% DPPH, 10 mM in DMSO 2,2-Diphenyl-1-picrylhydrazyl,97% 2,2-diphenyl-1-ylhydrazine 1,1-DIPHENYL-2-PICRYLHYDRAZYL DPPH 1898-66-4 C18H12N5O6 Radical Chemistry Picrylhydrazyl Derivatives Synthetic Reagents Stable Radicals Aromatic Hydrazides, Hydrazines, Hydrazones and Oximes DPPH