Description

Chempacific 38210 CAS NO 21203-64-5 is a high-purity chemical compound, also known as 2,2'-Azobis(2-methylpropionitrile) (AIBN), a widely used free-radical initiator. Its controlled decomposition at moderate temperatures makes it an essential component for initiating polymerization reactions with high efficiency and reliability. This product is critical for manufacturers in the polymer, plastics, and specialty chemical industries who require a consistent and high-activity initiator for producing acrylic polymers, styrenic resins, and other synthetic materials.

Application

• Polymerization Initiator: Primarily used as a free-radical initiator for the bulk, solution, and suspension polymerization of vinyl monomers such as methyl methacrylate (MMA), styrene, and acrylonitrile.
• Plastics & Resin Production: Essential in the manufacture of acrylic sheets (PMMA), polystyrene, ABS resins, and other engineering plastics where controlled molecular weight and polymer structure are required.
• Foaming Agent: Acts as a blowing agent in the production of expanded plastics and foams, generating nitrogen gas upon decomposition.
• Crosslinking Agent: Utilized in the crosslinking of unsaturated polyesters and other polymer systems to enhance thermal and mechanical properties.
• Adhesive & Coating Formulations: Incorporated into UV-curable inks, coatings, and adhesives to initiate curing reactions.
• Organic Synthesis: Employed in laboratory and industrial-scale organic synthesis to generate free radicals for various chemical transformations.

Basic Information

Product Name	Chempacific 38210
CAS No.	21203-64-5
Molecular Formula	C8H12N4
Molecular Weight	164.21 g/mol
Synonyms	2,2'-Azobis(2-methylpropionitrile); AIBN; Azobisisobutyronitrile; 2,2'-Azobis(isobutyronitrile); 2,2'-Azobis(2-methylbutyronitrile) (common misnomer); Porofor 57; Vazo 64; 2,2'-Dicyano-2,2'-azopropane; 2,2'-Azodi(2-methylpropionitrile); 2,2'-Azobis[2-methylpropanenitrile]
EINECS	244-253-9

Quality Control

Our Chempacific 38210 is manufactured under stringent quality management systems to ensure batch-to-batch consistency and high purity. It is tested against rigorous in-house specifications, which typically meet or exceed industry standards for free-radical initiators. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is provided with each shipment to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at temperatures below 25°C (77°F). Due to its nature as a free-radical initiator, it should be stored away from heat, sparks, open flames, and incompatible materials. Prolonged storage at elevated temperatures should be avoided. Keep container tightly sealed when not in use.

Specification

Item	Specification
Appearance	White crystalline powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0 %
Melting Point	102 - 105 °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.