Di-(2,4-Dichlorobenzoyl) Peroxide (DCBP, CAS 133-14-2), a high-performance organic peroxide initiator, is revolutionizing silicone rubber manufacturing and resin anchoring systems. With the molecular formula C₁₄H₆Cl₄O₄ and molecular weight of 380.01 g/mol, this compound delivers unmatched reactivity at low temperatures while adhering to stringent industrial safety standards
Technical Specifications & Physical Properties
Parameter
Value
Physical State
White to pale yellow crystalline powder or paste (50–99% purity grades)
Melting Point
55°C (decomposition)
Density
1.60 g/cm³
Solubility
Insoluble in water; soluble in benzene, chloroform, acetone
Flash Point
194°C
Half-Life (t₁/₂)
Decomposes at 45°C
Critical Safety Classifications:
UN Transport Codes: 3106 (silicon oil paste), 3118 (pure form), 3102 (hydrated)
GHS Hazard Category: Type B Organic Peroxide (explosive when dry)
Explosion Triggers: Friction, heat, shock, or contact with amines/reducing agents
Industrial Applications Driving Demand
1. Silicone Rubber Vulcanization
As a primary vulcanizing agent, DCBP enables:
High Crosslinking Density: >99% crosslinking in extrusion-molded medical tubing and seals
Transparency Control: Critical for optical-grade silicone products (e.g., LED encapsulants)
Energy Efficiency: Curing at 40–60°C vs. 100°C+ for traditional peroxides
2. Resin Anchoring Systems
Rapid Curing: Reduces setting time by 85% in construction adhesives vs. benzoyl peroxide (BPO)
Low-Temperature Performance: Enables reliable anchoring at sub-10°C environments
3. Composite Materials
Fiberglass Reinforcements: Accelerates polyester resin curing in marine/auto parts
Artificial Stone Production: Minimizes voids in marble/quartz composites
Safety Protocols: Non-Negotiable Handling Rules
DCBP’s decomposition above 45°C releases chlorine gas and poses explosion risks. Mandatory protocols include:
Storage: ≤30°C in sealed containers; stabilize pastes with silicone oil
PPE Requirements: Butyl rubber gloves, full-face shields, anti-static suits
Spill Response:
Absorb with inert materials (vermiculite/sand)
Never use water jets – triggers violent decomposition
Firefighting: CO₂ fog or alcohol-resistant foam only
⚠️ Acute Toxicity Data: LD₅₀ (mouse, peritoneal): 225 mg/kg
Future Innovations & Sustainability Trends
Bio-Based Stabilizers: Silicone-oil-free formulations to reduce aquatic toxicity
Closed-Loop Processing: Recycling decomposition byproducts (HCl) into PVC feedstocks
Digital Monitoring: IoT temperature sensors for real-time storage stability alerts
Regulatory Compliance & Transport
UN Packaging Group: II (hydrated forms), III (paste)
Prohibited Transport Partners: Acids, oxidizers, flammable solids
China Regulatory Status: Listed in Hazardous Chemicals Directory(2015)
Di-(2,4-Dichlorobenzoyl) Peroxide (CAS 133-14-2) remains indispensable for high-precision vulcanization, balancing explosive reactivity with evolving green chemistry solutions. For technical specifications or supplier verification, consult Guidechemor ChemicalBookwith batch-specific COAs.