Tert-Amyl Peroxypivalate is a peroxyester organic peroxide used as a free-radical initiator in selected polymerization processes. CAS No. 29240-17-3, molecular formula C10H20O3 and molecular weight 188.30 g/mol define its chemical identity. Its decomposition profile provides practical reference data for matching initiator activity with polymerization temperature and residence time.
Key Product Advantage
Defined Initiation Profile
The product has a measurable thermal decomposition profile across different reaction times. Half-life temperatures of 55°C at 10 hours, 72°C at 1 hour and 91°C at 0.1 hour provide clear reference points for initiator selection.
Temperature-Responsive Activity
The three half-life values allow process teams to compare decomposition rate with the operating temperature and residence time of a polymerization system.
Technical Parameters
|
Parameter |
Reference Value |
|
CAS No. |
29240-17-3 |
|
Molecular Formula |
C10H20O3 |
|
Molecular Weight |
188.30 g/mol |
|
Commercial Assay |
75 ± 1% |
|
Theoretical Active Oxygen |
8.50% |
|
Half-Life, 10 h |
55°C |
|
Half-Life, 1 h |
72°C |
|
Half-Life, 0.1 h |
91°C |
|
Viscosity at -10°C |
2.1 mPa·s |
|
Freezing Point |
< -23°C |
|
UN No. |
3113 |
|
Transport Class |
5.2 |
Polymerization Applications
Ethylene Polymerization
The product is used as an initiator for high-pressure ethylene polymerization in tubular and autoclave processes where controlled radical generation is required.
Vinyl Chloride Polymerization
It can be applied to suspension polymerization of vinyl chloride within the relevant process temperature range.
Acrylic Systems
The decomposition profile also supports evaluation in selected acrylic and related free-radical polymerization systems.
Initiator Selection
Temperature Fit
Compare the operating temperature with the half-life profile to determine the expected decomposition rate under the intended process conditions.
Residence Time
Longer residence times and shorter residence times require different initiation rates. The three reference temperatures provide useful screening points.
Polymerization Route
Process type, reactor configuration and polymerization method should be reviewed together when determining the appropriate initiator profile.
Process Matching
High-Pressure Processes
The product is suitable for evaluation in high-pressure ethylene polymerization where initiator decomposition must correspond to the reaction temperature.
Suspension Processes
For vinyl chloride suspension polymerization, the thermal activity profile can be matched with the selected operating temperature and reaction time.
Initiator Systems
Where a wider temperature range is required, the product may be evaluated within an initiator system according to the required polymerization profile.
Quality Control Points
Assay
A 75 ± 1% assay is a common commercial specification for the formulated product and provides a direct basis for concentration control.
Active Oxygen
The theoretical active oxygen content is 8.50%, providing a reference value for chemical characterization.
Physical Properties
Appearance, viscosity and freezing point provide additional checkpoints for formulation and incoming material verification.
Technical Documentation
Specification
The product specification defines the applicable assay, physical properties and quality parameters for the supplied grade.
Safety Documentation
Current safety documentation provides the information required for handling, storage, transportation and process assessment.
Batch Records
Batch-specific documentation supports material identification, quality verification and production traceability.
Application Evaluation
Monomer
Identify the target monomer and polymerization route before evaluating initiator suitability.
Operating Temperature
Map the actual process temperature against the half-life profile to establish an appropriate initiation window.
Reaction Time
Review residence time together with temperature because both directly influence initiator decomposition and radical generation.
Product Selection Checklist
Identity
Confirm CAS No. 29240-17-3, molecular formula and molecular weight against the required specification.
Activity
Check the 55°C, 72°C and 91°C half-life reference points against the intended process conditions.
Specification
Confirm assay, active oxygen, physical properties, documentation and transport requirements before order confirmation.
Supply & Inquiry
Technical Data
Include polymer type, monomer, polymerization method, operating temperature and residence time in a technical inquiry.
Quantity
Provide required quantity and expected annual consumption for production and supply planning.
Documents
Request the applicable specification, SDS, batch documentation and shipping information for the required grade.
FAQ
Q: What is Tert-Amyl Peroxypivalate used for?
A: It is a peroxyester organic peroxide used as a free-radical initiator for selected ethylene, vinyl chloride and acrylic polymerization processes.
Q: What is the CAS number?
A: The CAS number is 29240-17-3.
Q: What is the molecular weight?
A: The molecular weight is 188.30 g/mol.
Q: What are the half-life temperatures?
A: The reference half-life temperatures are 55°C at 10 hours, 72°C at 1 hour and 91°C at 0.1 hour.
Q: What information is needed for product selection?
A: Polymer type, monomer, polymerization method, operating temperature, residence time, required grade and quantity provide the key information for technical evaluation.
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