• Perodox® PD - Di(2,4-dichlorobenzoyl) peroxide

    CAS: 133-14-2

    High-performance organic peroxide for silicone rubber vulcanization and polymerization applications

  • Product Overview

    Perodox® PD,Di(2,4-dichlorobenzoyl) peroxide (CAS 133-14-2), also known as DCBP or bis(2,4-dichlorobenzoyl) peroxide, is a halogenated diaroyl peroxide widely used as a radical initiator and crosslinking agent in polymer chemistry. This organic peroxide compound is particularly valued for its application in silicone rubber vulcanization and as a polymerization catalyst for various monomers.

    Chemical Name:Di(2,4-dichlorobenzoyl) peroxide

    CAS Number:133-14-2

    EC Number:205-094-9

    Molecular Formula:C₁₄H₆Cl₄O₄

    Molecular Weight:380.01 g/mol

    Appearance:White to off-white crystalline powder or paste

    Active Oxygen Content:4.21% (theoretical)

    UN Number:3106 (Organic Peroxide, Type D)

  • Applications

    Diisobutyryl peroxide serves as a crucial polymerization initiator across multiple industries, with its primary application in high K-value PVC production

    Silicone Rubber Vulcanization

    Main application as crosslinking agent for silicone rubber, enabling both pressure and pressureless vulcanization processes

    Polymerization Initiator

    Radical source for polymerization of vinyl and acrylic monomers in PVC, rubber, and specialty plastics production

    Crosslinking Agent

    Used in polyester resins and other thermosetting polymers for crosslinking reactions

    Pharmaceutical Synthesis

    Intermediate in the synthesis of antibiotics, agrochemicals, and other pharmaceutical compounds

    Silicone Rubber Manufacturing

    Crosslinking agent for high-temperature vulcanization (HTV) silicone rubber, providing excellent heat resistance and mechanical properties

    Wire and Cable Insulation

    Used in production of low-voltage power cable rubber materials and oil-resistant flame-retardant cables for petroleum platforms

    Specialty Polymers

    Facilitates production of polymers with specific properties such as impact resistance and heat resistance

    Continuous Processing

    Suitable for hot air or infrared vulcanization systems operating at 150-400°C

    Adhesive Formulations

    Component in specialized adhesive systems requiring controlled crosslinking

  • Technical Data

    Technical Data About Perodox® 187

    Property

    Property:Value/Specification

    Appearance:White to off-white crystalline powder or gray-white uniform paste

    Purity:≥98% (HPLC) for pure form; 49.0-52.0% for paste form

    Active Oxygen Content:4.2-4.5% (theoretical: 4.21%)

    Melting Point:118-122°C (with decomposition)

    Density (20°C): 1.18-1.26 g/cm³

    Water Solubility (25°C):29.93 μg/L (practically insoluble)

    Vapor Pressure (25°C): 0.009 Pa

    Log P (Octanol/Water): 6 at 20°C

    Refractive Index:1.5282 (estimate)

    Thermal Stability and Decomposition Data

    Self-Accelerating Decomposition Temperature (SADT):60°C

    Control Temperature (TC):50°C Maximum storage temperature

    Emergency Temperature (Tem):55°C Immediate cooling required

    Half-life in Chlorobenzene 0.1 hour at 80°C

    1 hour at 65°C

    10 hours at 47°C

    Safe Processing Temperature:65°C (rheometer ts2 > 20 min)

    Typical Crosslinking Temperature:90°C (rheometer t90 ≈ 12 min)

    Decomposition Products

    Carbon dioxide (CO₂)

    1,3-Dichlorobenzene

    2,4-Dichlorobenzoic acid

    Traces of 2,2',4,4'-tetrachlorobiphenyl (PCB congener)

    Packaging and Storage

    Standard Industrial: 20 kg,Fiber can with inner PE bag or plastic drum

    Store in a cool, well-ventilated area away from heat sources and direct sunlight. Maximum storage temperature: 30°C. Keep containers tightly sealed. Separate from reducing agents, acids, bases, and heavy metal compounds.

    Advantage

    High radical yield at 80-120°C operating temperatures

    Low residue generation during decomposition

    Crosslinking not inhibited by oxygen (advantage over some other peroxides)

    Safe processing temperature of 65°C with rheometer ts2 > 20 minutes

    Typical crosslinking temperature of 90°C with rheometer t90 approximately 12 minutes

    Available in paste form (typically 50% in silicone oil) for easy mixing and homogenization

  • Frequently Asked Questions

    Comprehensive questions and answers about Perodox® 187 applications, safety, and technical specifications

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