Description

Valeric Acid 4,4-Bis(tert-Butylperoxy)Butyl Ester is a specialized organic peroxide ester, widely recognized as a highly efficient free-radical initiator and cross-linking agent. Its primary value lies in its ability to decompose at controlled temperatures to generate reactive radicals, making it indispensable for initiating polymerization and modifying polymer properties. This compound is essential for manufacturers in the polymer, plastics, and specialty chemical industries seeking to enhance material performance through cross-linking or controlled degradation.

Application

• Polymerization Initiator: Used as a free-radical initiator for the production of polyethylene (LDPE), polystyrene, and acrylic polymers.
• Cross-Linking Agent: Critical for the cross-linking of elastomers, polyethylene, and ethylene-propylene-diene monomer (EPDM) to improve heat resistance and mechanical properties.
• Curing Agent for Unsaturated Polyester Resins: Employed in the curing of fiberglass-reinforced plastics (FRP) and sheet molding compounds (SMC).
• Modifier for Polymer Properties: Used to control molecular weight and melt flow index (MFI) in polyolefins via controlled degradation (visbreaking).
• Synthesis Intermediate: Serves as a key intermediate in organic synthesis for introducing peroxy functional groups.
• Adhesive and Coating Formulations: Incorporated into formulations to initiate cure in UV or thermally activated adhesive and coating systems.

Basic Information

Product Name	Valeric Acid 4,4-Bis(tert-Butylperoxy)Butyl Ester
CAS No.	23448-68-2
Molecular Formula	C17H34O6
Molecular Weight	334.45 g/mol
Synonyms	4,4-Bis(tert-butylperoxy)valeric acid butyl ester; Butyl 4,4-bis(tert-butylperoxy)valerate; 1,1-Di(tert-butylperoxy)cyclohexane (related initiator class); DTBPV; tert-Butyl peroxy ester; Valeric acid peroxide ester; Organic peroxide initiator; Cross-linking peroxide L-101 (commercial designation)
EINECS	Contact for details

Quality Control

Our Valeric Acid 4,4-Bis(tert-Butylperoxy)Butyl Ester is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing to ensure consistent purity, active oxygen content, and stability, meeting the stringent requirements of polymer production. A comprehensive Certificate of Analysis (COA) detailing assay, impurities, and physical properties is provided with every shipment to guarantee traceability and compliance.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, well-ventilated area away from heat, sparks, and open flames. Due to its nature as a strong oxidizer and highly volatile compound, it must be segregated from reducing agents, acids, bases, and other incompatible materials. Recommended storage temperature is below 30°C (86°F).

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow liquid
Identification (IR)	Conforms
Assay (Active Oxygen)	≥ 9.6 %
Purity (HPLC)	≥ 95.0 %
Density (at 20°C)	~0.95 g/cm³
Refractive Index (n20D)	~1.425
Volatile Matter	≤ 1.0 %

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