Plasticizers
REACH
Diisodecyl phthalate
CAS Number
26761-40-0
EC Number
247-955-6
Abbreviation
DIDP
What is Diisodecyl phthalate?
Diisodecyl phthalate (CAS 26761-40-0), commonly known as DIDP, is a high-molecular-weight phthalate plasticizer for PVC and related polymer systems. Also marketed as Palatinol Z and Vestinol DZ.
Where is Diisodecyl phthalate used?
- Wire and cable insulation: thermal stability and low migration for long-service electrical applications
- Automotive interiors: heat resistance and reduced fogging in dashboards, door panels and underbody coatings
- Building and construction: flexibility in flooring, roofing membranes and wall coverings
- Sealants, adhesives and rubber compounds: low volatility and compatibility with high-filler systems
- It functions as a primary plasticizer, imparting flexibility and durability to rigid formulations.
Good to know: Offers lower volatility than lighter phthalate alternatives. Buyers should confirm isomer distribution and phthalate content with suppliers for regulated end-use markets.
Commercial specifications
- Bulk tankers, IBC containers and drums
- Technical grade; typically meets ISO and ASTM reference standards for plasticizer purity and color
Other Names (Synonyms)
Palatinol Z|Vestinol DZ|Plasticized ddp|bis(8-methylnonyl) benzene-1,2-dicarboxylate|Sicol 184|DIDP (plasticizer)|Bis(isodecyl)phthalate|1,2-Benzenedicarboxylic acid, 1,2-diisodecyl ester|DIDP
What are the physical properties of Diisodecyl phthalate?
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)
How is Diisodecyl phthalate classified and handled safely? Learn More
Warning
GHS09· Environmental Hazard GHS08· Health Hazard
Hazard Statements
H361 Suspected of damaging fertility or the unborn child
H400 Very toxic to aquatic life
H410 Very toxic to aquatic life with long lasting effects
H411 Toxic to aquatic life with long lasting effects
H413 May cause long lasting harmful effects to aquatic life
Precautionary Statements
P203 Obtain, consult and follow expert instructions for use.
P273 Avoid release to the environment.
P280 Wear protective gloves/protective clothing/eye protection/face protection.
P318 IF exposed or concerned, get medical advice.
Which trade and regulatory codes apply to Diisodecyl phthalate?
HS Code 2917 33 00
UN Number 3082
ADR Class 9
Packing Group III
Storage Class 10 - Combustible liquids
WGK (Germany) 1