Diisodecyl phthalate
CAS 26761-40-0
EC 247-977-1
Formula C28H46O4
MW 446.66 g/mol
Oils, Fats & Waxes Plastics & PolymersPrinting & PackagingRubber & TireBuilding & ConstructionAutomotiveCoatings, Adhesives, Sealants & Elastomers Plasticizer & Softener
Description
Diisodecyl phthalate (DIDP, CAS 26761-40-0) is a high-molecular-weight phthalate plasticizer sold under trade names including PX 120, Sicol 184, Vestinol DZ, and Palatinol Z. It carries no E-code designation and is classified under HS code 2917 33 00.
In PVC compounding, DIDP reduces polymer chain rigidity by inserting between macromolecular chains, lowering the glass transition temperature and improving flexibility in wire and cable insulation, flooring, and automotive interior components. Its higher molecular weight compared to standard phthalates results in reduced volatility and improved permanence in thick-section profiles and sealants.
DIDP is supplied as a technical-grade oil and is subject to REACH regulation (EC 247-977-1), with usage restrictions applicable in certain consumer-facing applications under SVHC candidate list considerations. Procurement teams should confirm current authorization status and application-specific compliance requirements before specification. Packaging formats typically include drums and isotanks for bulk supply.
In PVC compounding, DIDP reduces polymer chain rigidity by inserting between macromolecular chains, lowering the glass transition temperature and improving flexibility in wire and cable insulation, flooring, and automotive interior components. Its higher molecular weight compared to standard phthalates results in reduced volatility and improved permanence in thick-section profiles and sealants.
DIDP is supplied as a technical-grade oil and is subject to REACH regulation (EC 247-977-1), with usage restrictions applicable in certain consumer-facing applications under SVHC candidate list considerations. Procurement teams should confirm current authorization status and application-specific compliance requirements before specification. Packaging formats typically include drums and isotanks for bulk supply.
Physical Properties
| Melting Point | -50 °C |
| Boiling Point | 250-257 °C @ Press: 4 Torr |
| Density | 0.966 g/cm³ @ Temp: 20 °C |
| Flash Point | 235 °C |
| Color | Colourless |
| Odor | Faint. |
| Form | Oil |
| Water Solubility | 0.28mg/L(24 ºC) |
| Vapor Pressure | 0.1 hPa (20 °C) |
| Refractive Index | n 20/D 1.486 |
| Log P | 10.554 (est) |
Safety & Handling (Learn More)
Warning GHS09 GHS08
H
H361H400H410H411H413
P
P203P273P280P318P391P405P501
Trade & Regulatory
| HS Code | 2917 33 00 |
| UN Number | 3082 |
| ADR Class | 9 |
| Packing Group | III |
| Storage Class | 10 - Combustible liquids |
| WGK (Germany) | 1 |
Other Names
bis(8-methylnonyl) benzene-1,2-dicarboxylateDIDPPX 120Sicol 184Palatinol ZVestinol DZDIISODEYLPHTHALATE
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