Physical Properties
Half-Life Data
Decomposition Products: tert-butyl alcohol, methane, 2-ethyl acid, n-heptane, ethane, carbon dioxide
Aliases & Synonyms
- Other names
- tert-butyl peroxy-2-ethylhexanoate · TBPEH
- Also supplied under these brand names*
- Trigonox 21 · Lupersol PDO(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
TBPEH (tert-Butyl peroxy-2-ethylhexanoate, CAS 3006-82-4) is a medium-temperature ester peroxide widely used as a polymerization initiator and curing agent. Its 10-hour half-life temperature of 73°C makes it ideal for: • Initiating polymerization of styrene, acrylates, and vinyl acetate • Curing unsaturated polyester resins at moderate temperatures • Production of PVC and EVA via suspension or bulk polymerization • High-pressure polyethylene (LDPE) production as a secondary initiator • Rubber and silicone crosslinking in cable and wire insulation LAAP supplies TBPEH in multiple formulations: 97% pure, and diluted solutions (75%, 50%) in odorless mineral spirits for safer handling and transportation.
Technical Selection Guide
Product Overview
tert-Butyl peroxy-2-ethylhexanoate (TBPEH, CAS 3006-82-4) is a medium-temperature peroxyester with 7.35% minimum active oxygen and a 10-hour half-life temperature of 73°C. It is one of the most widely used low-to-mid temperature initiators for acrylic, styrenic and (meth)acrylate polymerization, and for the curing of unsaturated polyester and vinyl ester resins.
Half-Life & Temperature Profile
TBPEH's 10-hour half-life of 73℃ and 1-hour value of 100℃ place its process window at roughly 90-130°C. It is a frequent choice for the mid-section of a multi-initiator cascade in LDPE and PVC processes, where a fast initiator starts the reaction and TBPEH carries it through the peak. Because the decomposition products include 2-ethylhexanoic acid and carbon dioxide, venting and devolatilization design matter when TBPEH is used at high loading.
Selection Within the Same Family
In the LAAP peroxyester family, TBPEH (73°C) is the low-temperature workhorse; TBPMH (CAS 13122-18-4, 94°C) and TBPA (CAS 107-71-1, 100°C) are progressively higher-temperature options, and TBPB (CAS 614-45-9, 103°C) is the highest of the group. Choose TBPEH when the process target is 90-130°C; step up to TBPMH or TBPA when you need the initiator to survive a hotter melt or a longer residence time. TBPEH is also the standard choice where a liquid, easily metered initiator is preferred over a solid.
Quality, REACH & Documentation
Standard TBPEH is a colourless to pale yellow liquid, ≥97% pure, with a colour specification of 20 APHA and an activation energy of 124.9 kJ/mol. Typical controls are assay, active oxygen, colour and water content. Each batch ships with a CoA; REACH-compliant SDS and a TDS with the half-life table are available.
Packaging, MOQ & Lead Time
Standard packing is 20 kg polyethylene drums, with custom sizes on request. SADT is 35°C and the recommended storage temperature is 20°C, so TBPEH is one of the products that genuinely requires cold-chain logistics — it should never be stored above 25°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