Tris-(Nonylphenyl) Phosphite

Industrial Applications Tris(Nonylphenyl) Phosphite (TNPP) is widely used as a secondary antioxidant and heat stabilizer in plastics, particularly in polyolefins, PVC, and rubber, where it protects against thermal degradation and prevents discoloration during processing. It also serves as a stabilizer in lubricants, adhesives, and coatings, often in combination with primary antioxidants for synergistic effects. Physical Properties Tris(Nonylphenyl) Phosphite (TNPP) is an organophosphite antioxidant typically appearing as a clear to pale yellow viscous liquid with a mild characteristic odor. It has a high boiling point (above 200 °C), low volatility, and is insoluble in water but soluble in most organic solvents. Grade Industrial Other Names Tris(4-nonylphenyl) Phosphite Form Liquid Abbreviations TNPP