Description and features
Phostacon DPDP (Diphenyl isodecyl phosphite) is a clear liwuid which has C22H31O3P as chemical formula. It it used as a color and processing stabilizer in polycarbonate, polyurethanes, ABS polymers, coatings and it is also used as a secondary stabilizer in PVC.

Diphenyl isodecyl phosphite is also known as Isodecyl diphenyl phosphite and phosphorous acid, 8-methylnonyl diphenyl ester.

Product information

CAS number26544-23-0
EC number 247-777-4
HS code2920 90 85

Molecular weight and structural information

Molecular formulaC22H31O3P
Molecular weight374.45 g/mol
Smiles notationCC(C)CCCCCCCOP(OC1=CC=CC=C1)OC2=CC=CC=C2
Structural formula:26544-23-0


AppearanceClear liquid
Acid Value≤0.0 1 (mg KOH/gm)
Phosphorus content8.30 %
Colour (APHA)≤50

Physicochemical information

Boiling point435.74 °C
Melting point154.75 °C
Flash point130.00 ºC
Partition coefficient (log Pow)8.52
Refractive index1.5160 - 1.5220 (25 °C)
Solubility in waterInsoluble (< 0.1 mg/l)
Specific gravity1.020 - 1.036 g/m3 (25 °C/15 °C)
Vapour pressure2.07E-09 Pa @ 25°C

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

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

This substance (CAS: 26544-23-0) has been pre-registered under REACH (EC) 1907/2006.

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