Benzoyl Peroxide
CAS Number: 94-36-0
Featured inIndustrial Catalysts
Benzoyl peroxide (BPO) is a thermally labile organic peroxide initiator that generates phenyl and benzoyloxy radicals upon decomposition between 70–100°C. It is the most common initiator for suspension polymerization, free-radical crosslinking of unsaturated polyester and vinyl ester resins, and vulcanization of silicone rubbers. Available in powder (75–78% active) and paste grades.
Technical Specifications
| appearance | White granular powder or paste |
| moisture (%) | 22–25 (wetted grade) |
| purity (as BPO, %) | 75–78 (phlegmatized grade) |
| particle size (mesh) | 90% through 40 mesh |
| active oxygen content (%) | 6.5–7.1 |
Applications
- Suspension polymerization of polystyrene and EPS beads
- Free-radical cure of unsaturated polyester and vinyl ester resins
- Hot-press vulcanization of silicone rubber compounds
- PMMA dental and bone cement curing agent
- Acne treatment and pharmaceutical API synthesis
Key Features
- Generates highly reactive phenyl radicals for fast cure of polyester and vinyl ester resins
- Phlegmatized grade reduces deflagration risk for safer handling and transport
- Broad compatibility with promoters (cobalt, DMPT) for room-temperature cure
- Established regulatory status for pharmaceutical and food-contact applications
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CAS Number
94-36-0
Category
Polymer Synthesis ChemicalsAvailability
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