Trigonox® 21S is an initiator for (co)polymerization of ethylene, styrene, acrylonitrile and (meth)acrylates. Curing agent for unsaturated polyester resins.

| 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 |
| Density, 20 °C | 0.900 g/cm³ |
| Viscosity, 20 °C | 4.3 mPa.s |
Trigonox® 21S (tert-Butyl peroxy-2-ethylhexanoate) can be used for the market segments: polymer production, thermoset composites and acrylics with their different applications/functions. For more information please check our website and/or contact us.
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