ChemicalBook > CAS DataBase List > 2,2-diphenyl-1-picrylhydrazyl

2,2-diphenyl-1-picrylhydrazyl

Product Name
2,2-diphenyl-1-picrylhydrazyl
CAS No.
1898-66-4
Chemical Name
2,2-diphenyl-1-picrylhydrazyl
Synonyms
DPPH;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;Diphenypicrylhydrazyl;inhibit,DPPH,Inhibitor
CBNumber
CB8753025
Molecular Formula
C18H12N5O6*
Formula Weight
394.32
MOL File
1898-66-4.mol
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2,2-diphenyl-1-picrylhydrazyl Property

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
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
EPA Substance Registry System
Hydrazyl, 2,2-diphenyl-1-(2,4,6-trinitrophenyl)- (1898-66-4)
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Safety

Hazard Codes 
Xn
Risk Statements 
42/43
Safety Statements 
22-36/37-45
RIDADR 
UN2811
WGK Germany 
1
RTECS 
MW3250000
TSCA 
Yes
HazardClass 
6.1
PackingGroup 
II
HS Code 
29280000
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Hazard and Precautionary Statements (GHS)

Symbol(GHS)
Signal word
Danger
Hazard statements

H242Heating may cause a fire

H315Causes skin irritation

H317May cause an allergic skin reaction

H319Causes serious eye irritation

H334May cause allergy or asthma symptoms or breathing difficulties if inhaled

Precautionary statements

P210Keep away from heat/sparks/open flames/hot surfaces. — No smoking.

P235Keep cool.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P370+P378In case of fire: Use … for extinction.

P403Store in a well-ventilated place.

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N-Bromosuccinimide Price

Sigma-Aldrich
Product number
D9132
Product name
2,2-Diphenyl-1-picrylhydrazyl
Packaging
1g
Price
$138
Updated
2024/03/01
Sigma-Aldrich
Product number
D9132
Product name
2,2-Diphenyl-1-picrylhydrazyl
Packaging
5g
Price
$435
Updated
2024/03/01
TCI Chemical
Product number
D4313
Product name
1,1-Diphenyl-2-picrylhydrazyl Free Radical
Purity
>97.0%(HPLC)
Packaging
1g
Price
$86
Updated
2024/03/01
TCI Chemical
Product number
D4313
Product name
1,1-Diphenyl-2-picrylhydrazyl Free Radical
Purity
>97.0%(HPLC)
Packaging
5g
Price
$282
Updated
2024/03/01
Alfa Aesar
Product number
044150
Product name
2,2-Diphenyl-1-picrylhydrazyl (free radical), 95%
Packaging
250mg
Price
$46.3
Updated
2024/03/01
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2,2-diphenyl-1-picrylhydrazyl Chemical Properties,Usage,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.

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 oxychloride Chloroform Sodium nitrite Diethyl ether Benzene Sodium bicarbonate Thiourea dioxide Diphenylamine Acetic acid Methanol Sodium hydroxide Pyridine Magnesium sulfate Lead dioxide PETROLEUM ETHER

Preparation Products

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

WUHAN FORTUNA CHEMICAL CO., LTD
Product
2,2-Diphenyl-1-picrylhydrazyl (free radical) 1898-66-4
Price
US $1.00/g
Min. Order
1g
Purity
99.0%-100.00%
Supply Ability
2kg/month
Release date
2021-06-01
Career Henan Chemical Co
Product
2,2-DIPHENYL-1-PICRYLHYDRAZYL 1898-66-4
Price
US $1.00/KG
Min. Order
1g
Purity
99.0%
Supply Ability
100kg
Release date
2020-01-10

1898-66-4, 2,2-diphenyl-1-picrylhydrazylRelated 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-PICRYL-HYDRAZYL, 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

  • 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
  • 1,1-DIPHENYL-2-PICRYLHYDRAZYL
  • 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
  • DPPH
  • Diphenylpicrylhydrazyl.
  • "2,2-DIPHENYL-1-PICRYLHYDRAZYL,FREE RADICAL, 95%
  • 1,1-Diphenyl-2-picrylhydrazylFreeRadical&gt
  • 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
  • 1898-66-4
  • C18H12N5O6
  • Radical Chemistry
  • Picrylhydrazyl Derivatives
  • Synthetic Reagents
  • Stable Radicals
  • Aromatic Hydrazides, Hydrazines, Hydrazones and Oximes
  • DPPH