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Description and features

In most polymers, Rostabil TNF (Trisnonylphenol phosphite) is a cost effective, high purity stabilizer that improves color and processing stability during recovery, drying, compounding, processing and end use. Synergism is realized when it is combined with other stabilizers such as hindered phenols. It may be added alone or in combination with the monomers and / or in antioxidant emulsions during recovery and / or during compounding. TNF is excellent in preventing gel formation polymerization, finishing, storage and factory processing. TNF is a versatile phosphite stabilizer which is useful in a large number of polymers such as polyethylene, polypropylene, polystyrene, HDPE, LLDPE, SBR, ABS, PVC and others. TNPP is also a suitable stabilizer for a myriad of elastomers such as SBR, NBR and SIS. It is highly effective in light colored solution and emulsion polymerized elastomers. The use of the TNF phosphite is sanctioned by the Food and Drug Administration (FDA) for food contact applications under 21CFR178.2010 covering antioxidants and / or stabilizers for polymers. Rostabil TNF is also cleared for use as an antioxidant in many polymers for food contact applications in Japan, Europe, Canada and many other countries


Europe: Rostabil TNF (Trisnonylphenol phosphite) is ➔ on stock in our local warehouses our lead time is about one week if delivered in 200 KG drums.

United States, Canada, South America, South Africa and other markets can also be served, please contact our sales department for more details.

This substance (CAS: 26523-78-4) has been registered (FULL) under
REACH (EC) 1907/2006.

Product Identification

CAS number 26523-78-4
EC number 247-759-6
HS code 2920 29 00
IUPAC Name tris(4-nonylphenyl, branched) phosphite


AppearanceSligtly coloured homogeneous liquid
Acid value≤0.3 (mg KOH/gm)
Colour ≤60 (Hazen)
Free nonylphenol ≤3.0 %
Phosphorus content 4.30 %


Available packaging: 200KG steel drums and 1.000 KG IBC.
Special packaging is available on request.


Store Trisnonylphenol phosphite in a cool, dry and well-ventilated area and in line with legal requirements.
Keep TPP away from heat sources and oxidizing agents.


A Material Safety Data Sheets (MSDS) is available for Rostabil TNF and all other products supplied by Vesta Chemicals BV.

An MSDS describes the hazards of a product and explains how a product can be safely handled, used and stored. Besides it provides important regulatory and emergency response information for the purchased product.

Molecular and structural information

Molecular formula C45H69O3P
Molecular weight 660.96 g/mol
Structural formula 26523-78-4

Physicochemical information

Boiling point >300 °C @ 102 kPa
Decomposition temperature 322 °C under nitrogen
Flash point 207 ºC @ 1 atm
Melting point +/- 6 ºC
Partition coefficient (log Pow) 21.60 ± 0.60
Refractive index 1.527 – 1.533 @ 25 °C
Relative density 0,965 – 0,990 g/m3 @ 25 °C
Solubility in water Insoluble (< 0.1 mg/l)
Specific gravity 0.975 – 0.998/m3 (25 °C/15 °C)
Vapour pressure 0.000000000005 Pa
Trisnonylphenol phosphite | CAS: 26523-78-4 | Disclaimer. This information is supplied solely for informational purposes and Vesta Chemicals bv makes no guarantees or warranties, either expressed or implied, with respect to the accuracy and use of this data. All product warranties and guarantees shall be governed by the Standard Terms of Sale. Nothing in this document is legal advice or is a substitute for competent legal advice.