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Description and features
Phostacon ODPP (Diphenyl isooctyl Phosphite) is clear liquid which has C20H27O3P as chemical formula. It is an alkyl-aryl phosphite which can be used as a color and processing stabilizer in ABS, polycarbonate, polyurethane, coatings, and PET fiber where regulatory approval for food contact is not required .It can be used as a secondary stabilizer to improve color and heat stability in PVC.

Diphenyl isooctyl Phosphite is also known as isooctyl diphenyl phosphite and phosphorous acid 6-methylheptyldiphenyl ester.

Product information

CAS number26401-27-4
EC number 247-658-7
HS code2920 90 85
SensitivityNot hygroscopic

Molecular and structural informational

Molecular formulaC20H27O3P
Molecular weight346.40 g/mol
Smiles notationCC(C)CCCCCCCOP(Oc1ccccc1)Oc2ccccc2
Structural formula:26401-27-4


AppearanceClear liquid
Acid Value≤0.10 (mg KOH/gm)
Phosphorus content9.00 %
Colour (APHA)≤50
Refractive Index1.5210 - 1.5230 (25 ºC)
Specific gravity1.040 - 1.047g/m3 (25 ºC /15 ºC)

Physicochemical informationn

Boiling point389.90 °C @ 760 mmHg
Density1.090 kg/m3
Flash point234.10 °C
Melting point-54.00 °C
Partition coefficient (log Pow)6.60
Refractive index1.5210 - 1.5230 (25 ºC)
Solubility in waterInsoluble
Specific gravity1.040 - 1.047g/m3 (25 ºC /15 ºC)
Vapour pressure0 mmHg @ 25°C

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

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

This substance (CAS: 26401-27-4) has been pre-registered under REACH (EC) 1907/2006.

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

Diphenyl isooctyl 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.