Di-tert-butyl peroxide
CAS 110-05-4
EC 203-733-6
Formula C8H18O2
MW 146.23 g/mol
Oxidizers & Peroxides Plastics & PolymersRubber & Tire CatalysisCross-linking & Curing
Description
Di-tert-butyl peroxide (CAS 110-05-4) is an organic peroxide supplied under trade names including Trigonox B, Perbutyl D, Cadox TBP, Interox DTB, and B 50Elq. It carries EC number 203-733-6 and the molecular formula C8H18O2. No E-code applies to this substance.
In plastics and polymer processing, di-tert-butyl peroxide functions as a free-radical initiator, decomposing under heat to generate tert-butoxy radicals that drive polymerisation and chain scission reactions. In rubber and tire manufacturing, it acts as a cross-linking agent, forming covalent bonds between polymer chains to improve mechanical strength and heat resistance.
This product is available as a liquid and is subject to REACH registration requirements within the EU. Procurement teams should confirm SDS compliance and transport classification under ADR, as organic peroxides carry specific handling obligations. Contact our team for available pack sizes and lead times.
In plastics and polymer processing, di-tert-butyl peroxide functions as a free-radical initiator, decomposing under heat to generate tert-butoxy radicals that drive polymerisation and chain scission reactions. In rubber and tire manufacturing, it acts as a cross-linking agent, forming covalent bonds between polymer chains to improve mechanical strength and heat resistance.
This product is available as a liquid and is subject to REACH registration requirements within the EU. Procurement teams should confirm SDS compliance and transport classification under ADR, as organic peroxides carry specific handling obligations. Contact our team for available pack sizes and lead times.
Physical Properties
| Melting Point | -40 °C |
| Boiling Point | 111 °C |
| Density | 0.7910 g/cm³ @ Temp: 25 °C |
| Flash Point | 34 °F |
| Appearance | colourless liquid |
| Color | Clear |
| Odor | distinctive odor |
| Form | Liquid |
| Water Solubility | immiscible |
| Vapor Pressure | 40 mm Hg ( 20 °C) |
| Refractive Index | n 20/D 1.3891(lit.) |
| Log P | 3.2 at 22℃ |
Safety & Handling (Learn More)
Danger GHS02 GHS08 GHS07
H
H225H242H319H334H341H402H412
P
P203P210P233P234P235P240P241P242P243P260P271P273P280P284P318P403P405P410P411P420P501P264+P265P304+P340P337+P317P342+P316P370+P378P403+P235P303+P361+P353P305+P351+P338
Trade & Regulatory
| HS Code | 29096000 |
| UN Number | 3107 |
| ADR Class | 5.2 |
| Storage Class | 5.2 - Organic peroxides and self-reacting hazardous materials |
| WGK (Germany) | 1 |
Other Names
2-tert-butylperoxy-2-methylpropanetert-Butylperoxidedi-tert-butylperoxideDTBPB 50ElqCadox TBPPerbutyl DTrigonox B
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