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Description and features
Phostacon EHDP (Ethylhexyl diphenyl Phosphite) is a 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.

This material is also known as 2-ethylhexyl diphenyl phosphite.

Product information

CAS number15647-08-2
EC number 239-716-5
HS code2920 90 85
SensitivityNot hygroscopic

Molecular and structural information

Molecular formulaC20H27O3P
Molecular weight346.40 g/mol
Smiles notationCCCCC(CC)COP(=O)(OC1=CC=CC=C1)OC2=CC=CC=
Structural formula:1241-94-7


AppearanceClear liquid
Acid Value≤0.10 (mg KOH/gm)
Phosphorus content9.00 %
Colour (APHA)≤50

Physicochemical information

Boiling point412.54 °C
Density1.044 kg/m3 @ 25 ºC
Flash point234.00 °C @ 1 atm
Melting point< -20.00 °C @ 1 atm
Partition coefficient (log Pow)7.54 @ 25 °C
Refractive index1.5176 – 1.5246 (25 ºC)
Solubility in waterInsoluble (< 0.1 mg/l)
Specific gravity1.0280 - 1.0580g/m3 (25 ºC/ 15 ºC)
Vapour pressure0.000549 Pa @ 25°C

Available packaging: 200 KG steel drums.
Special packaging available upon request.

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

This substance (CAS: 15647-08-2) has been pre-registered under REACH (EC) 1907/2006.

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

Ethylhexyl diphenyl 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.