Overview
Trigonox 289-IN VR is a special peroxide blend with a vanishing red (VR) indicator system, suitable for curing unsaturated polyester, vinyl ester, and acrylic thermosetting resins at ambient conditions in conjunction with a metal salt. As one of the recommended international brand products in our organic peroxide range, Trigonox 289-IN VR is supplied with supply chain resource support for formulators sourcing a curing system with built-in mix and cure monitoring.
Product Identification
| Brand | Nouryon |
| Chemical Short Name | CHP mixture / MEKP blend |
| Product CAS Nr | 80-15-9 (CHP), 1338-23-4 (MEKP) |
Specifications
| Appearance, 20-25°C | Clear red liquid |
| Total active oxygen | 8.8-9.0 % |
Characteristics
| Density, 20°C | 1.16 g/cm³ |
| Viscosity, 20°C | 23 mPa.s |
Applications of Trigonox 289-IN VR in Ambient-Cure Resin Systems
Trigonox 289-IN VR offers the advantages of a standard red peroxide formulation to indicate product flow and proper mixing into the resin. The vanishing red (VR) series of products includes a red indicator system that disappears during the cure, so the red color is only visible when needed but not in the finished end product. The key features are: it indicates initiator presence, it allows monitoring of the mixing step, it allows monitoring of the cure by color, it indicates under-cured areas in the mould, and it leaves the end product colorless after the cure.
Why Higher Active Oxygen Content Matters
With a total active oxygen content of 8.8-9.0%, Trigonox 289-IN VR is specified at a higher active oxygen level than some other vanishing-red peroxide blends in the same product family, which can be a relevant factor when formulators are comparing cure speed and dosing requirements across VR-series products for a given resin and accelerator system.
Why Sourcing Consistency Matters for Buyers
Because total active oxygen content and viscosity directly affect cure behavior and dosing accuracy, formulators should confirm current specifications for this peroxide blend against the latest technical data sheet before scheduling a production run. A supplier that consistently delivers this blend within its stated active oxygen and viscosity specifications reduces the need to re-qualify a curing recipe with every new batch.
This is particularly relevant for producers relying on the VR color-indication system to monitor mixing and cure quality, where peroxide purity and dosing consistency are directly tied to the reliability of the visible color-fade cure signal. Buyers should confirm current batch documentation against the latest technical data sheet before finalizing a production schedule.
What to Consider When Sourcing Trigonox 289-IN VR
Buyers evaluating Trigonox 289-IN VR for the first time should confirm that its total active oxygen (8.8-9.0%) and viscosity specifications match their dosing equipment, and should review whether their metal salt accelerator and resin system are compatible with an ambient-cure, vanishing-red peroxide blend. Requesting the current certificate of analysis alongside the safety data sheet is a practical way to confirm that a given batch matches the specifications listed above.
Packaging, storage temperature requirements, and transport classification should also be confirmed directly with the supplier, since organic peroxides are subject to specific handling and shipping regulations. Buyers sourcing this peroxide blend for time-sensitive production schedules should discuss lead time and temperature-controlled logistics requirements before finalizing an order.
General Handling and Storage Guidance
As with other organic peroxides, this product should be stored in accordance with the supplier’s safety data sheet, typically in a cool, temperature-controlled, well-ventilated area away from direct sunlight, incompatible materials, and sources of heat or ignition. Personnel handling this material should follow the personal protective equipment and handling procedures specified in the SDS, since organic peroxides can decompose exothermically under certain storage or contamination conditions.
Buyers should request and review the current safety data sheet for Trigonox 289-IN VR prior to receipt, and confirm that on-site storage conditions, including temperature control, are compatible with the product’s recommended storage requirements. Proper inventory rotation and adherence to the stated shelf life help maintain the active oxygen and performance characteristics described above.
Where to Source This Product
Thousands Chemicals supplies Trigonox 289-IN VR and related organic peroxide products through our digital B2B marketplace, with supply chain resource support for formulators sourcing curing systems for unsaturated polyester, vinyl ester, and acrylic resins. Peroxide handling and classification are commonly referenced against guidelines published by 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 qualified buyers, we can provide the safety data sheet and, where available, a certificate of analysis for the specific batch of Trigonox 289-IN VR being quoted. Specifications listed on this page reflect the manufacturer’s published values; buyers should confirm current documentation before finalizing a purchase order.
FAQ
What is Trigonox 289-IN VR used for?
It is used for curing unsaturated polyester, vinyl ester, and acrylic thermosetting resins at ambient conditions with a metal salt accelerator.
What does the “VR” in Trigonox 289-IN VR stand for?
VR stands for vanishing red, a color indicator system that shows initiator presence and mixing but disappears during cure, leaving the end product colorless.
What is the active oxygen content of Trigonox 289-IN VR?
It has a total active oxygen content of 8.8-9.0%, supplied as a clear red liquid.
Can you provide technical documentation and bulk pricing for Trigonox 289-IN VR?
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 289-IN VR
Contact our team for pricing, documentation, and lead time on Trigonox 289-IN VR. Our sourcing specialists can help confirm whether this curing system matches your process requirements before you place an order.
