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Description and features
Phostacon TDP (Triisodecyl phosphite) is a clear liquid which has C30H63O3P as chemical formula. It is a trialkyl phosphite which is useful as a secondary stabilizer in ABS, PET (polyethylene terephthalate), PET fibers, coatings, lubricants, PVC, polycarbonate and polyurethanes.

This material is also known as Phosphorus acid triisodecyl ester and isodecylphosphite.

Product information

CAS number25448-25-3
EC number 246-998-3
HS code2920 90 85
SensitivityNot hygroscopic

Molecular and structural information

Molecular formulaC30H63O3P
Molecular weight502.79 g/mol
Structural formula:25448-25-3


AppearanceClear liquid
Acid Value≤0.10 (mg KOH/gm)
Phosphorus content6.20 %
Colour (APHA)≤50

Physicochemical information

Boiling point485.52 °C
Flash point150 °C @ 1 atm
Melting point< -20 °C @ 1 atm
Partition coefficient (log Pow)12.31 @ 25 °C
Refractive index1.4500 - 1.5300 (25 ºC)
Solubility in waterInsoluble (< 0.1 mg/l)
Specific gravity0.874 - 0.914 g/m3 (25 ºC/15 ºC)
Vapour pressure1E-09 to 5E-07 Pa

Available packaging: 180KG steel drums.
Special packaging is available on request.

Shipment Info
Europe and United States: Provided Phostacon TDP 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 Triisodecyl phosphite in a cool, dry and well-ventilated area and in line with legal requirements.
Keep TDP away from heat sources and oxidizing agents.

This substance (CAS: 25448-25-3) has been pre-registered under REACH (EC) 1907/2006.

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

Triisodecyl 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.