Chemical name:

Tris(nonylphenyl) phosphite


specialty products, specialty additives

Markets and applications:

building & construction, other applications, CASE, adhesives, coatings, paints & coatings, plastics, polymer additives, transportation, other applications


antioxidants, heat stabilizers, thermal & processing stabilizers




PCC Rokita SA Phosphorus Chemistry Business Unit

CAS No.:



Rostabil TNF is a specialist additive for plastics used as a process stabilizer. It prevents degradation of polymer materials during processing, strengthens the colour stability of materials containing pigments and provides transparency to non-pigmented products. The Rostabil TNF stabilizer is in the form of a homogeneous liquid, which makes it possible for it to be used it already at the stage of synthesis of macromolecular compounds. In addition, high hydrolytic stability enables the use of the stabilizer in processes occurring in a strongly alkaline environment.

During processing, plastics may decompose, and therefore thermal stabilizers are used to prevent further degradation already at the processing stage. In the context of polymeric materials, the term degradation (aging) is used to determine changes in physical properties caused by chemical reactions. As a result of these reactions, the polymer chain ruptures, which causes a decrease in the molar mass of the macromolecular compound. These changes directly affect the course of the processing process and the functional properties of finished products, i.e. colour, gloss, shade.

 In order to prevent the destructive effects of oxygen, temperature or ozone, stabilizers or mixtures thereof are used that exhibit synergistic synergistic effects. Rostabil TNF can be used as a co-stabilizer with primary stabilizers (zinc, barium, calcium stearates) during PVC processing. It is widely used in the production of powder paints. Rostabil TNF is one of the most commonly used antioxidants in the production of synthetic rubbers. Due to its unique non-staining properties, it is widely used in SBR processing, in particular in synergy with phenolic stabilizers.

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Properties and applications:

Product application advantages:


  • eliminates the effect of yellowing of materials during processing,
  • enhances the colour stability of polymeric materials containing pigments,
  • provides transparency in non-pigmented materials,
  • occurs in a liquid form, giving the possibility of using at the stage of polymer synthesis,
  • acts synergistically with amine and phenolic stabilizers,
  • one of the components of "mixed metals" mixtures in PVC processing,
  • non-staining properties,
  • no negative effect on the mechanical properties of the material.


 Applications :


  • C.A.S.E. (Coatings, Adhesives, Sealants, Elastomers),
  • construction (roofing and roofing membranes, construction materials, window frames, PVC pipes),
  • plastics (production of synthetic rubber, SBR, technical films),
  •  textiles (coated fabrics, artificial leather),
  • electronics (cables and wires),
  • automotive (powder paints, gaskets, V-belts, tires, acoustic insulation).

Alternative names:

Show alternative names
TNPP; tris(2-nonylphenyl) phosphite; trinonylphenyl phosphite; phenol, nonyl-, phosphite (3:1); nonylphenyl phosphite; phenol, nonyl-, 1,1',1''-phosphite; phosphite; phosphite ester; organophosphite; organophosphorous compound; aryl phosphite; (Hide)


TNPP stabilizer antioxidant antioxidant anti-ageing degradation prevention degradation resistance degradation decomposition ageing discoloration yellowing yellowness yellowness index oxidation induction time accelerated ageing colour change stability multiple processing polymers cross-linking synergist synergy synergism secondary additive secondary additive co-stabilizer phenolic stabilizers additive synergist for phenolic stabilizers mixtures thermal process processing functional properties phosphorus derivatives phosphite thermal stability hydrolysis resistance hydrolytic resistance plastic additives plastics aid PVC polyvinyl chloride poly(vinyl chloride) soft hard dry blends powders granules masterbatches epoxy resins epoxides polyester resins polyesters acrylic resins acrylates vinyl ester resins vinyl esters sprays coatings elastomers caoutchouc latex synthetic rubber rubber products rubber materials SBR vulcanization powder coatings
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