Description

4,4'-Azobis[2,4-Dihydro-2,5-Diphenyl-3H-Pyrazol-3-One] is a high-purity, thermally decomposable azo compound widely used as a free radical initiator. It matters for industrial processes requiring a reliable and efficient source of radicals to initiate polymerization or cross-linking reactions under controlled conditions. This product is essential for manufacturers in the polymer, specialty chemical, and advanced materials sectors who need consistent initiator performance for product quality and process stability.

Application

• Polymerization Initiator: Used as a free radical source for the synthesis of various polymers, including acrylics, styrenics, and vinyl polymers.
• Cross-linking Agent: Facilitates the formation of cross-linked networks in resins, elastomers, and coatings to enhance thermal and mechanical properties.
• Foaming Agent: Acts as a blowing agent in the production of polymeric foams, where its decomposition generates gas to create a cellular structure.
• Curing Agent for Adhesives and Sealants: Initiates the curing process in reactive adhesive and sealant formulations.
• Organic Synthesis Intermediate: Serves as a radical precursor in the synthesis of specialty organic compounds and fine chemicals.
• Research & Development: Employed in laboratory settings for studying radical reaction mechanisms and developing new polymeric materials.

Basic Information

Product Name	4,4'-Azobis[2,4-Dihydro-2,5-Diphenyl-3H-Pyrazol-3-One]
CAS No.	56666-59-2
Molecular Formula	C30H22N6O2
Molecular Weight	498.54 g/mol
Synonyms	2,2'-Azobis(2,4-dihydro-2,5-diphenyl-3H-pyrazol-3-one); 4,4'-Azobis(2,4-dihydro-2,5-diphenyl-3H-pyrazol-3-one); 2,2'-Azobis(2,4-dihydro-5-phenyl-3H-pyrazol-3-one); 4,4'-Azobis(2,4-dihydro-5-phenyl-3H-pyrazol-3-one); Azobis(pyrazolone); Azo-bis-pyrazolone; ADPP; Contact for details on additional trade names.
EINECS	Contact for details

Quality Control

Our 4,4'-Azobis[2,4-Dihydro-2,5-Diphenyl-3H-Pyrazol-3-One] is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure high purity and consistent performance as a radical initiator. Certificates of Analysis (COA) detailing purity, assay, and key physical parameters are available upon request to support your quality assurance protocols.

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). Keep away from heat, sparks, and open flame. This material is light-sensitive (store away from light).

Specification

Item	Specification
Appearance	Yellow to orange crystalline powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0%
Melting Point	Contact for details
Loss on Drying	≤ 1.0%
Residue on Ignition	≤ 0.1%

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