Overview
Trigonox 21S is tert-Butyl peroxy-2-ethylhexanoate, a perester organic peroxide used as a curing agent for unsaturated polyester resin and as an initiator for polymer production, thermoset composites, and acrylics. As one of the recommended international brand products in our organic peroxide range, it is supplied with supply chain resource support for formulators sourcing a perester curing agent for elevated and high-temperature UP resin curing.
Product Identification
| Brand | Nouryon |
| Chemical Short Name | TBPEH (tert-Butyl peroxy-2-ethylhexanoate) |
| Product CAS Nr | 3006-82-4 |
Specifications
| Acid as 2-ethylhexanoic acid | ≤ 0.30 % |
| Active oxygen | ≥ 7.18 % |
| Appearance | Clear liquid |
| Assay | ≥ 97.0 % |
| Color | ≤ 30 APHA |
| Inorganic + organic hydrolysable chloride | ≤ 100 mg/kg |
| TBHP | ≤ 1000 mg/kg |
Characteristics
| Density, 20 °C | 0.900 g/cm³ |
| Viscosity, 20 °C | 4.3 mPa.s |
Applications
Trigonox 21S can be used for the market segments of polymer production, thermoset composites, and acrylics, with different applications and functions depending on the specific process. This range of use supports formulation work across building and construction, automotive and transportation, and marine applications where an elevated-temperature curing agent is required. For more information on a specific application, please check our website and/or contact us.
Why Assay and Active Oxygen Content Matter
Trigonox 21S is preferred for curing unsaturated polyester resin based Hot Press Molding formulations, such as SMC and BMC, in the temperature range of 120 to 160°C. For this type of elevated-temperature cure, assay and active oxygen content directly affect cure speed and the consistency of cure behavior from batch to batch. Because Trigonox 21S is specified at a minimum assay of 97.0 percent and minimum active oxygen of 7.18 percent, with acid content limited to 0.30 percent, formulators can expect a consistent starting point for curing agent dosing across production batches.
Because organic peroxides are thermally sensitive and reactive materials, formulators should always confirm current assay, active oxygen content, and recommended dosage against the latest technical data sheet and SDS for their specific hot press molding or polymerization process.
What to Consider When Sourcing Trigonox 21S
When sourcing a perester curing agent for elevated-temperature UP resin curing or polymer production, formulators typically evaluate assay, active oxygen content, color, and chloride impurity levels against their process specification, along with consistency between production batches. Working with a supplier that can provide consistent documentation and responsive technical support can help reduce qualification time when approving a new organic peroxide grade for a hot press molding or polymer production line.
Because this curing agent is positioned across polymer production, thermoset composite, and acrylics market segments, buyers should confirm that the specific grade and packaging format they are sourcing meets the cure temperature and dosage requirements of their target application, rather than assuming all perester grades are interchangeable.
General Handling and Storage Guidance
As with most organic peroxides, this product should be stored in its original, tightly sealed container in a cool, dry, well-ventilated location away from heat sources, direct sunlight, and incompatible materials, and used within the manufacturer’s recommended shelf life. Because Trigonox 21S is a reactive perester, containers should be handled according to the current SDS and kept within the recommended storage temperature range at all times.
Shelf life and specific storage temperature ranges vary by batch and packaging format, so formulators should always confirm current shelf life, recommended storage temperature, and any handling precautions against the latest technical data sheet and SDS for the specific batch of this organic peroxide they are working with.
Where to Source This Product
Thousands Chemicals connects formulators with Trigonox 21S and related organic peroxide products through our digital B2B marketplace. Active oxygen content and curing performance are commonly evaluated using test methods published by organizations such as ASTM International. Our team can help confirm packaging, lead times, and technical documentation for your target application and order volume.
Documentation We Can Provide
For buyers evaluating this curing agent for a new hot press molding, polymer production, or acrylics process, our team can help arrange the current technical data sheet and safety data sheet. Having this documentation in hand before finalizing a process can help avoid delays later in your qualification or approval process.
FAQ
What is Trigonox 21S used for?
It can be used for the market segments of polymer production, thermoset composites, and acrylics, and is preferred for curing UP resin based Hot Press Molding formulations such as SMC and BMC.
What is the CAS number and chemical name?
Trigonox 21S is tert-Butyl peroxy-2-ethylhexanoate, CAS number 3006-82-4, supplied by Nouryon.
What cure temperature range is recommended?
It is preferred for curing UP resin based Hot Press Molding formulations in the temperature range of 120 to 160°C.
Can you provide technical documentation and bulk pricing?
Yes, technical data sheets and SDS documentation are available on request, and our team can provide bulk pricing and lead times based on your target volume and delivery location.
Get a Quote for Trigonox 21S
Contact our team for a quote, technical data sheet, or SDS for this perester curing agent. We support bulk supply and global shipping for formulators sourcing organic peroxides for hot press molding, polymer production, and acrylics applications.
