Description

2,2-Diphenyl-1-Picrylhydrazyl (DPPH) is a stable, crystalline free radical widely recognized as a standard analytical reagent. Its primary value lies in its reliable and quantifiable radical scavenging activity, making it an indispensable tool for evaluating antioxidant capacity. This compound is essential for research and quality control laboratories in the pharmaceutical, nutraceutical, food science, and cosmetic industries.

Application

• Antioxidant Activity Assay: The standard method for measuring the free radical scavenging potential of substances in vitro.
• Pharmaceutical R&D: Screening and quantifying the antioxidant properties of new drug candidates and formulations.
• Food & Beverage Analysis: Assessing the antioxidant content and shelf-life stability of edible oils, supplements, and functional foods.
• Cosmetic Ingredient Testing: Evaluating the efficacy of anti-aging and protective ingredients like vitamins and plant extracts.
• Polymer & Material Science: Studying the kinetics of radical reactions and the effectiveness of stabilizers and inhibitors.
• Academic & Educational Research: A fundamental reagent for teaching and conducting experiments in free radical chemistry and biochemistry.
• Quality Control Standard: Used to calibrate instruments and validate methods for antioxidant testing protocols.

Basic Information

Product Name	2,2-Diphenyl-1-Picrylhydrazyl
CAS No.	1898-66-4
Molecular Formula	C18H12N5O6
Molecular Weight	394.32 g/mol
Synonyms	DPPH; DPPH Free Radical; 1,1-Diphenyl-2-picrylhydrazyl; 2,2-Diphenyl-1-(2,4,6-trinitrophenyl)hydrazyl; α,α-Diphenyl-β-picrylhydrazyl; Diphenylpicrylhydrazyl; Aldrich 258912; Picrylhydrazyl, 2,2-diphenyl-
EINECS	217-591-8

Quality Control

Our 2,2-Diphenyl-1-Picrylhydrazyl is produced and handled under strict quality management protocols to ensure batch-to-batch consistency and high purity for analytical applications. Each lot is tested to confirm identity, purity, and radical activity. A comprehensive Certificate of Analysis (COA) detailing specific test results is provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). This material is light-sensitive and should be stored away from direct light exposure to maintain stability.

Specification

Item	Specification
Appearance	Dark purple to black crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 97.0%
Melting Point	127 - 131 °C
Loss on Drying	≤ 0.5 %
Residue on Ignition	≤ 0.1 %

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.