Download Product Sheet

Description and features
Phostacon THOP (Tetraphenyl dipropyleneglycol diphosphite) is a clear liquid which has C30H32O7P2 as chemical formula. It is an aryl-alkyl organo phosphite which has a relatively high phosphorus content. It is recommended for use as stabilizer in rigid and plasticized PVC applications where high gloss is important.

Tetraphenyl dipropyleneglycol diphosphite is also known as THOP, oxybis(1-methylethylene) tetraphenyl diphosphite, oxybis(1-methyl-2,1-ethanediyl)tetraphenyl phosphite and oxybis(1-methylethylene) tetraphenyl diphosphite.

Product information

CAS number80584-85-6
EC number 279-498-9
HS code2920 90 85
SensitivityNot hygroscopic

Molecular and structural information

Molecular formulaC30H32O7P2
Molecular weight566.52 g/mol
Smiles notationCC(COCC(C)OP(Oc1ccccc1)Oc2ccccc2)OP(Oc3ccccc3)Oc4ccccc4
Structural formula:80584-85-6


AppearanceClear liquid
Refractive Index1.557 - 1.563 (25 ºC)
Specific gravity1.164 - 1.190g/m3 (25 ºC/ 15 ºC)

Physicochemical information

Boiling point571.30 °C @ 760 m mHg
Flash point376.00 ºC
Partition coefficient (log Pow)8.58300
Refractive index1.557 - 1.563 (25 ºC)
Solubility in waterInsoluble (< 0.1 mg/l)
Specific gravity1.164 - 1.190g/m3 (25 ºC/ 15 ºC)

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

Shipment Info
Europe and United States: Provided Phostacon THOP 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 Tetraphenyl Dipropyleneglycol Diphosphite 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: 80584-85-6) has been pre-registered under REACH (EC) 1907/2006.

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

Tetraphenyl Dipropyleneglycol Diphosphite : 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.