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Description and features
In most polymers, Phostacon TNPP (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. TNPP is excellent in preventing gel formation polymerization, finishing, storage and factory processing. TNPP 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 TNPP phosphite is sanctioned by the Food and Drug Administration (FDA) for food contact applications under 21CFR178.2010 covering antioxidants and / or stabilizers for polymers. Phostacon TNPP is also cleared for use as an antioxidant in many polymers for food contact applications in Japan, Europe, Canada and many other countries.

Production information

CAS number26523-78-4
EC number 247-759-6
HS code2920 29 00
SensitivityNot hygroscopic

Molecular and structural information

Molecular formulaC45H69O3P
Molecular weight660.96 g/mol
Smiles notationSmiles
Structural formula:26523-78-4

AppearanceClear liquid
Acid value≤0.1 (mg KOH/gm)
Phosphorus content4.30 %
Colour (APHA)≤60
Refractive Index1.5268 – 1.5306 (25 °C)
Specific gravity0.975 – 0.998/m3 (25 °C/15 °C)

Physicochemial information

Boiling point>300 °C @ 102 kPa
Decomposition temperature322 °C under nitrogen
Flash point207 ºC @ 1 atm
Melting point+/- 6 ºC
Partition coefficient (log Pow)21.60 ± 0.60
Refractive index1.5268 – 1.5306 (25 °C)
Relative density0.98 g/cm3 @ 20 ºC
Solubility in waterInsoluble (< 0.1 mg/l)
Specific gravity0.975 – 0.998/m3 (25 °C/15 °C)
Vapour pressure0.000000000005 Pa

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

Shipment Info
Europe and United States: Provided Phostacon TNPP is on stock in our local warehouses our lead time is about one week if delivered in 200 KG drums.
Canada, South America, South Africa and other markets can also be served, please contact our sales department for more details.

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.

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

A Material Safety Data Sheets (MSDS) is available for Phostacon TNPP and all other products supplied by Vesta Intracon 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.

Trisnonylphenol phosphite: Disclaimer. This information is supplied solely for informational purposes and Vesta Intracon 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.