Tert-Butyl Peroxyacetate is a peroxyester organic peroxide used as a thermal free-radical initiator in selected polymerization processes. CAS No. 107-71-1, molecular formula C₆H₁₂O₃ and molecular weight 132.18 g/mol identify the active peroxide. Its half-life profile helps match initiator activity with polymerization temperature and residence time.
Key Technical Parameters
|
Parameter |
Value |
|
Molecular Weight |
132.18 g/mol |
|
Theoretical Active Oxygen |
12.11% |
|
Half-Life at 10 h |
100°C |
|
Half-Life at 1 h |
119°C |
|
Half-Life at 0.1 h |
139°C |
|
Decomposition Temperature |
159°C |
|
SADT |
70°C |
|
Emergency Temperature |
65°C |
|
Storage Temperature |
-15 to 10°C |
|
UN Number |
3103 |
|
Transport Class |
5.2 |
Product Form
Physical Appearance
Clear, colorless liquid.
Active Peroxide
The active peroxide determines the available radical initiation level and forms the basis for dosing calculations.
Commercial Formulation
Commercial grades can be supplied at different peroxide concentrations. The active concentration and diluent system should be confirmed from the applicable product specification.
Key Product Advantage
Controlled Thermal Decomposition
The defined half-life profile provides a clear reference for evaluating peroxide decomposition at different polymerization temperatures.
Temperature-Based Initiator Selection
Half-life data at 100°C, 119°C and 139°C support comparison of initiator activity with the target reaction temperature.
Residence-Time Matching
The 10-hour, 1-hour and 0.1-hour reference points help relate peroxide activity to the residence time of the polymerization process.
Process Evaluation Basis
The thermal profile provides measurable data for assessing initiator suitability before determining concentration and dosing conditions.
Polymerization Applications
Acrylate Systems
Applicable to selected acrylate polymerization processes where the reaction temperature falls within the relevant decomposition range.
Methacrylate Systems
Suitable for evaluation in selected methacrylate polymerization processes requiring thermal radical initiation.
Ethylene Systems
The thermal profile can be considered for selected ethylene polymerization processes where initiator decomposition must correspond with reaction conditions.
Process Selection
Temperature Range
Compare the target reaction temperature with the half-life data to establish the expected decomposition rate.
Residence Time
The 10-hour, 1-hour and 0.1-hour reference points help relate initiator activity to different process residence times.
Dosing Level
The required dosage depends on active peroxide concentration, polymerization conditions and the target initiation rate. Calculations should use the actual concentration of the supplied grade.
Formulation Considerations
Active Concentration
Peroxide concentration directly affects feed calculations and active-oxygen input.
Diluent
The formulation may contain a compatible organic diluent. The selected formulation should match process requirements and applicable storage conditions.
Batch Specification
Peroxide content, appearance and relevant physical properties should conform to the agreed technical specification.
Storage & Handling Parameters
Storage Temperature
The referenced storage range is -15 to 10°C. Temperature control should be maintained throughout designated storage conditions.
Thermal Parameters
SADT is 70°C and the emergency temperature is 65°C. These values are relevant to storage and handling planning.
Handling Control
Handling procedures should follow the applicable SDS and product specification, with attention to temperature, contamination control and material compatibility.
Transport Information
UN Number
UN 3103 identifies the applicable organic peroxide transport entry.
Transport Class
The product is classified under Class 5.2 for organic peroxides.
Shipping Documentation
Transport documentation should reflect the actual peroxide concentration, formulation, packaging configuration, transport mode and destination requirements.
Quality Control
Identity Testing
CAS number, molecular formula and molecular weight establish the primary chemical identity.
Active Content
Peroxide concentration and active oxygen provide key references for batch consistency and process dosing.
Physical Inspection
Appearance and applicable physical-property measurements support routine batch verification.
Specification & Documentation
Technical Specification
The specification should state the applicable peroxide concentration, appearance, active content and relevant physical parameters.
Safety Data Sheet
SDS information supports storage, handling, transport and site-level chemical management.
Technical Data
Half-life temperatures, concentration data and physical properties provide the technical basis for process evaluation and grade selection.
FAQ
Q: What is Tert-Butyl Peroxyacetate?
A: Tert-Butyl Peroxyacetate is a peroxyester organic peroxide used as a thermal free-radical initiator in selected polymerization processes.
Q: What is the CAS number?
A: The CAS number is 107-71-1.
What are the half-life temperatures?
The reference half-life temperatures are 100°C at 10 hours, 119°C at 1 hour and 139°C at 0.1 hour.
Q: What is the molecular weight?
A: The molecular weight is 132.18 g/mol and the molecular formula is C₆H₁₂O₃.
Q: What information is required for product selection?
A: Polymerization temperature, residence time, monomer system, required initiation level and actual peroxide concentration are key inputs for technical evaluation.
Q: What is the storage temperature?
A: The referenced storage range is -15 to 10°C. The applicable product specification and SDS should be followed for the supplied formulation.
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