Description

tert-Amyl Peroxybenzoate is an organic peroxide widely recognized as a highly efficient free-radical initiator. Its primary value lies in its ability to decompose at moderate temperatures, generating radicals that drive polymerization and cross-linking reactions with excellent control. This makes it a critical component for manufacturers in the polymer and resin industries seeking to optimize production efficiency and product performance. Key users include producers of unsaturated polyester resins, acrylics, and specialty coatings.

Application

• Primary initiator for the curing of unsaturated polyester resins (UPR) in the manufacture of fiberglass-reinforced plastics (FRP), sheet molding compound (SMC), and bulk molding compound (BMC).
• Key component in the polymerization of vinyl monomers such as styrene, methyl methacrylate, and vinyl acetate.
• Used as a cross-linking agent for elastomers and polyethylene to enhance thermal and chemical resistance.
• Essential in the production of acrylic resins and coatings, where it ensures consistent curing and final film properties.
• Employed in the synthesis of specialty polymers and adhesives requiring controlled molecular weight and architecture.
• Applied in composite material manufacturing for automotive, marine, and construction applications.

Basic Information

Product Name	tert-Amyl Peroxybenzoate
CAS No.	4511-39-1
Molecular Formula	C12H16O3
Molecular Weight	208.26 g/mol
Synonyms	tert-Amyl Perbenzoate; Peroxybenzoic acid, 1,1-dimethylpropyl ester; TAPB; TAPBO; 1,1-Dimethylpropyl peroxybenzoate; tert-Pentyl peroxybenzoate; tert-Pentyl perbenzoate; Perbenzoic acid, tert-amyl ester
EINECS	224-829-8

Quality Control

Our tert-Amyl Peroxybenzoate is manufactured under strict quality management systems to ensure batch-to-batch consistency and reliability. Each lot undergoes comprehensive analytical testing, including assay by HPLC and active oxygen content determination, to meet precise specifications for purity and performance. Certificates of Analysis (COA) detailing all test results are provided with every shipment. Our quality commitment aligns with industry best practices for organic peroxide initiators.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, well-ventilated area away from heat, sparks, and open flames. Recommended storage temperature is below 30°C (86°F). Keep away from incompatible materials such as reducing agents, strong acids, bases, and accelerators. This product is light-sensitive (store away from light) and a strong oxidizer; observe all local regulations for hazardous material storage.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow liquid
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0 %
Active Oxygen	≥ 7.68 %
Density (at 20°C)	1.02 - 1.04 g/cm³
Refractive Index (n20D)	1.495 - 1.505

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