Diisodecyl Phthalate
DIDP, Phthalic Acid Diisodecyl Ester.
- CAS
- 26761-40-0
- EC
- 247-955-6
- Sectors
- Plastics & Polymers, Building & Construction, Automotive
Diisodecyl Phthalate (CAS 26761-40-0) is a high-molecular-weight general-purpose phthalate plasticizer supplied in Technical Grade at 99.5% minimum purity, a clear, colorless, odorless oily liquid used to give flexible PVC long-term durability in wire and cable insulation, automotive sealants and vinyl flooring. It is supplied in Technical Grade with a purity of 99.5% min, offering extremely low volatility.
This clear, odorless liquid is valued for its Superior Extraction Resistance and excellent electrical insulating properties. Its high thermal stability makes it the industry standard for manufacturing wire and cable insulation that must withstand high temperatures.
DIDP provides better aging resistance compared to lower phthalates, ensuring that flexible PVC parts retain their physical properties over time. It is a vital component in Automotive Undercoatings and high-performance roofing membranes.
Typical Properties
| Molecular formula | C28H46O4 |
|---|---|
| Molecular weight | 446.66 g/mol |
| Form | Oil |
| Color | Colourless |
| Odor | Faint. |
| Melting point | -50 °C |
| Boiling point | 250-257 °C @ Press: 4 Torr |
| Density | 0.966 g/cm³ @ Temp: 20 °C |
| Water solubility | 0.28mg/L(24 °C) |
| Flash point | 235 °C |
| GHS signal word | Warning · Health hazard, Environmental hazard |
| Grades available | Technical Grade |
Typical literature values for identification; lot-specific results are stated on the certificate of analysis (COA) and the safety data sheet (SDS) that accompany every delivery.
Diisodecyl Phthalate
Applications
- Wire and Cable: Primary plasticizer for 105°C rated electrical insulation and high-performance building wire jackets.
- Automotive Sealants: Used in PVC-based underbody coatings and sealants due to its low fogging and permanence.
- Vinyl Flooring: Enhances the flexibility and wear resistance of high-traffic commercial and residential PVC flooring.
Safety & Risks
Classified as Environmentally Hazardous (Aquatic Chronic 4). Handling requires the use of Safety Glasses, Nitrile Gloves, and Spill Containment Kits to prevent environmental release.
Packaging
Available in 200 kg Steel Drums, 1000 kg IBC Tanks, or bulk ISO Tankers.