Physical Properties
Half-Life Data
Decomposition Products: carbon dioxide, 1,3-dichlorobenzene, 2,4-dichlorobenzoeacid, traces of 2,2',4,4'-tetrachlorobiphenyl
Aliases & Synonyms
- Also written as
- Di(2,4-dichlorobenzoyl)peroxide
- Other names
- 2,4-dichlorobenzoyl peroxide · DCBP
- Also supplied under these brand names*
- Perkadox PD 50S(Commercial Reference)*
* Brand names are trademarks of their respective owners and are referenced for identification purposes only. LAAP products are not manufactured or endorsed by these companies.
Overview
Works as an excellent vulcanizing agent for silicone rubber, providing safe handling at 75°C and a vulcanization temperature of 90°C. The recommended dosage ranges between 1.1% and 2.3%. Beyond its use in the rubber industry, CBPO is also in the manufacturing of low-voltage power cable rubber materials and composite rubbers.
Technical Selection Guide
Product Overview
Bis(2,4-dichlorobenzoyl) peroxide (CBPO, CAS 133-14-2) is a low-temperature diacyl peroxide with 4.21% active oxygen and a 10-hour half-life temperature of 47°C. Its unusually low decomposition temperature makes it the standard vulcanizing agent for silicone rubber, where it allows curing at temperatures that would degrade other initiators.
Half-Life & Temperature Profile
CBPO decomposes at 80℃ (0.1 h), 65℃ (1 h) and 47℃ (10 h) — by far the lowest in the LAAP catalogue. In silicone rubber vulcanization the compound is typically processed at around 75°C and vulcanized at 90°C, with a recommended dosage of 1.1-2.3% on rubber. Because the decomposition temperature is so low, the mixing and forming steps must be kept cool to avoid scorch; this is why CBPO is usually supplied as a 50% paste rather than a dry powder.
Selection Within the Same Family
CBPO (47°C) is the lowest-temperature member of the LAAP diacyl family, well below DBPB and DCP. Within the diacyl group, LPO (CAS 105-74-8, 62°C) and BPO (CAS 94-36-0, 71°C) are progressively higher-temperature options; DIPB (CAS 3437-84-1, 23°C) is even lower but far less thermally stable. Choose CBPO when the process must run below 100°C and a paste form is acceptable. Its decomposition products include carbon dioxide and 1,3-dichlorobenzene, so ventilation must be designed accordingly.
Quality, REACH & Documentation
CBPO is a white paste supplied at ≥50.0 ± 1.0% active content. Typical controls are assay, active oxygen and paste consistency. Each batch ships with a CoA; REACH-compliant SDS and a TDS with the half-life table and recommended dosages are available.
Packaging, MOQ & Lead Time
Standard packing is 20 kg fiberboard drums with a plastic inner liner, with custom packaging on request. SADT is 60°C and the recommended storage temperature is 30°C. Minimum order quantity starts at 25 kg, and quotations are returned within 24 hours.
Ready to Get Started?
Contact our team to discuss your organic peroxide requirements and discover how we can support your business
Lanzhou, Gansu, China