Description

4,4'-Azobis(3-Methyl-1-Phenyl-2-Pyrazolin-5-One) is a high-purity, specialized azo initiator widely recognized for its efficiency in free radical polymerization processes. This compound matters for its ability to generate free radicals at moderate temperatures, offering precise control over polymer chain initiation and molecular weight distribution. It is essential for R&D chemists and production engineers in the polymer, specialty chemical, and advanced materials industries who require reliable and consistent initiator performance.

Application

• Polymerization Initiator: A key free radical source for the synthesis of acrylic polymers, styrenic resins, and other vinyl polymers.
• Cross-linking Agent: Used in the production of thermosetting plastics, elastomers, and coatings to enhance mechanical strength and thermal stability.
• Foaming Agent: Employed in the manufacture of polymeric foams, where its decomposition gases create a controlled cellular structure.
• Curing Agent for Adhesives & Sealants: Facilitates room-temperature or heat-activated curing in industrial adhesive formulations.
• Modifier for Specialty Polymers: Used in the development of high-performance engineering plastics and functional polymers with specific properties.
• Research & Development: A critical reagent in academic and industrial labs for studying polymerization kinetics and developing novel polymeric materials.

Basic Information

Product Name	4,4'-Azobis(3-Methyl-1-Phenyl-2-Pyrazolin-5-One)
CAS No.	13615-29-7
Molecular Formula	C20H18N6O2
Molecular Weight	374.40 g/mol
Synonyms	4,4'-Azobis(3-methyl-1-phenyl-5-pyrazolone); 1,1'-Azobis(3-methyl-1-phenyl-2-pyrazolin-5-one); 3-Methyl-1-phenyl-4-(1-phenyl-3-methyl-5-oxo-1,5-dihydro-4H-pyrazol-4-yl)diazenyl-1H-pyrazol-5-one; Azobis(methylphenylpyrazolone); ABMPP; Polymerization Initiator V-19; Azo Initiator 13615-29-7
EINECS	Contact for details

Quality Control

Our 4,4'-Azobis(3-Methyl-1-Phenyl-2-Pyrazolin-5-One) is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets the high standards required for polymerization applications. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is provided with each shipment to guarantee traceability and consistency for your critical processes.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated place at a controlled room temperature (15-25°C). This product is light-sensitive (store away from light) and easily oxidized (store under inert atmosphere). Keep away from heat, sparks, open flames, and incompatible materials. For long-term storage, consider maintaining under an inert gas atmosphere such as nitrogen or argon.

Specification

Item	Specification
Appearance	Yellow to orange crystalline powder
Identification (IR)	Conforms to structure
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.