Tert-Butyl Peroxy-3,5,5-Trimethylhexanoate

Tert-Butyl Peroxy-3,5,5-Trimethylhexanoate is a peroxyester organic peroxide used as a radical initiator in selected polymerization processes. CAS No. 13122-18-4, molecular formula C₁₃H₂₆O₃ and molecular weight 230.34 g/mol define the chemical identity. Its thermal decomposition profile provides a practical reference for matching initiator activity with polymerization temperature and residence time.

Defined Decomposition Window
The reference half-life temperatures are 100°C at 10 hours, 119°C at 1 hour and 160°C at 1 minute, measured in benzene at 0.1 mol/L. These values provide a quantitative basis for matching initiator decomposition with polymerization temperature and residence time.

Temperature-Based Initiator Selection
The half-life profile allows process conditions to be assessed against the required initiation rate. This supports selection where the reaction temperature needs to align with a defined peroxide decomposition rate.

Residence-Time Matching
The 10-hour, 1-hour and 1-minute reference points provide different activity levels across the thermal range. This helps evaluate whether the initiator profile fits the available residence time in the polymerization process.

Quantitative Process Evaluation
Half-life data provide measurable reference points for laboratory screening, process development and scale-up. Initiator performance can be assessed using temperature, decomposition rate and residence time rather than product identity alone.

Suitable for Thermal Initiation Systems
As a peroxyester organic peroxide, the product generates radicals through thermal decomposition. Its defined decomposition profile makes it suitable for polymerization systems where controlled thermal initiation is required.

Temperature Matching
Half-life data provide a quantitative starting point for assessing initiator activity at the intended polymerization temperature.

Residence Time
The decomposition rate can be evaluated together with reactor residence time to determine the required initiation profile.

Initiator Loading
Process development can use peroxide activity, reaction temperature and residence time together when establishing the working dosage.

Ethylene Polymerization
The product is documented as a radical initiator for ethylene polymerization.

Styrene Polymerization
It is also used in selected styrene polymerization processes where thermal initiation is required.

Other Polymer Systems
Peroxyester grades based on this active peroxide are also used in selected acrylate and methacrylate polymerization and curing systems. The applicable concentration and formulation should be confirmed before process qualification.

Storage Temperature
The technically pure grade has a recommended maximum storage temperature of 25°C.

Thermal Control
The reported SADT is approximately 60°C. Storage conditions should therefore follow the current product SDS and applicable handling procedures.

Storage Stability
Reference technical data specify 3 months of activity stability from the delivery date under the stated storage conditions.

Temperature Management
Temperature control should be maintained throughout storage and transport according to the current SDS and transport documentation.

Transport Classification
The applicable transport classification is determined by product concentration, packaging and transport regulations.

Documentation
The shipment documentation should correspond to the actual product grade, package configuration and destination requirements.

Standard Containers
Reference packaging for the technically pure grade includes 25 kg HDPE canisters, with 15 kg HDPE canisters also available.

Package Integrity
Containers should remain closed and protected from conditions outside the specified storage range during handling and storage.

Shipment Documents
TDS, SDS and batch-specific COA provide the core technical documents for product review and shipment preparation.

Peroxide Content
Peroxide content provides a direct quantitative measure of the active peroxide concentration.

Active Oxygen
Active oxygen offers an additional analytical reference for peroxide content and batch evaluation.

Physical Properties
Density, viscosity and refractive index provide supporting identity and consistency checks for incoming material.

Chemical Identity
Confirm CAS No. 13122-18-4, molecular formula and molecular weight against the required specification.

Thermal Profile
Compare the half-life temperatures with the target reaction temperature and residence time.

Product Grade
Confirm whether the process requires technically pure material or a formulated concentration.

Technical Documents
Review the current TDS, SDS and batch COA before process qualification, shipment and production use.

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