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Description and features
Phostacon TPP (Triphenyl phosphite) is a clear liquid with has C18H15O3 as chemical formula. It is an organo-phosphite which provides excellent colour improvement and heat stability. It is used in ABS, polyethylene, polypropylene, polystyrene, polyester resins, epoxy resins and synthetic rubber.

TPP is also known as Triphenyl phosphoric acid ester and Triphenoxyphosphine oxide.

Product information

CAS number101-02-0
EC number 202-908-4
HS code2920 29 00
SensitivityNot hygroscopic

Molecular and structural information

Molecular formulaC18H15O3P
Molecular weight310.28 g/mol
Smiles notationc1ccc(cc1)OP(Oc2ccccc2)Oc3ccccc3
Structural formula:101-02-0


AppearanceClear liquid
Acid value≤0.50 (mg KOH/gm)
Colour (Hazen)≤50
Phosphorus content9.80 - 10.00 %
Phenol content≤1.00 %

Physicochemical information

Boiling point386 °C @ 101.63 kPa
Flash point218.30 ºC
Melting point144 ºC
Partition coefficient (log Pow)6.62 @ 25 ºC
Relative density1.18 g/l @ 20 ºC
Refractive index1.5750 - 1.5980 @ 25 ºC
Specific gravity1.170 - 1.195 g/m3 (25 ºC / 15 ºC)
Solubility in waterInsoluble (< 0.1 mg/l)
Vapour pressure0.0000763 mm Hg @ 25 ºC

Phostacon TPP (Triphenyl phosphite) can be used in several polymer applications, including adhesives, coatings, epoxies, polycarbonates, polyesters, polyurethanes, PVC and styrenics.

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

Shipment Info
Europe and United States: Provided Phostacon TPP 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 Triphenyl 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: 101-02-0) has been registered (FULL) under REACH (EC) 1907/2006.

A Material Safety Data Sheets (MSDS) is available for Phostacon TPP 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.

Triphenyl 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.