Substance profile
Diisooctyl phthalate
Diisooctyl phthalate is nearly colorless, viscous liquid with a mild odor.
01 · Identification
What Diisooctyl phthalate is
Diisooctyl phthalate is nearly colorless, viscous liquid with a mild odor. Its molecular formula is C24H38O4 and its molecular weight is 390.6 g/mol. It boils at 370 °C, melts at -4 °C.
Under the GHS it carries the signal word Danger.
02 · GHS classification
Hazards and label elements
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
| Code | Hazard statement |
|---|---|
| H360FD | May damage fertility. May damage the unborn child. |
03 · Physical and chemical properties
Diisooctyl phthalate properties
Every value is shown with the conditions it was measured under and the source it came from. Where sources disagree, all values are listed rather than one being picked — the difference is usually a different form of the substance, not an error.
| Property | Value | Conditions | Source |
|---|---|---|---|
| Boiling point | 370 °C (698 °F) | HSDB | |
| 697.78 °C (1288 °F) | at 760 mmHg | CAMEO | |
| Melting point | -4 °C (24.8 °F) | From Table | HSDB |
| -45 °C (-49 °F) | ICSC | ||
| Density | 0.99 g/cm³ | ICSC | |
| 8.2 g/cm³ | at 20 °C | HSDB | |
| 0.9815 g/cm³ | range, midpoint shown, at 20 °C | HSDB | |
| Solubility | ... compatible with vinyl chloride resins and some cellulosic resins | HSDB | |
| Solubility in water: none | ICSC | ||
| In water, 9.0X10-2 mg/L at 25 °C | at 25 °C | HSDB | |
| Vapor pressure | 0.0000055 mmHg | at 25 °C | HSDB |
| 0.0000055 mmHg | Haz-Map | ||
| Vapor pressure at 20 °C: negligible | at 20 °C | ICSC | |
| Flash point | 232.22 °C (450 °F) | HSDB | |
| Autoignition temperature | 393 °C (739.4 °F) | ICSC | |
| Vapor density | 13.5 (air = 1) | HSDB |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
04 · Handling and storage
Storing and handling Diisooctyl phthalate
Reactivity
DI-ISOOCTYL PHTHALATE reacts exothermically with acids to generate isooctyl alcohol and phthalic acid. Strong oxidizing acids may cause a vigorous reaction that is sufficiently exothermic to ignite the reaction products. Heat is also generated by interaction with caustic solutions. Flammable hydrogen is generated by mixing with alkali metals and hydrides. Can generate electrostatic charges. [Handling Chemicals Safely, 1980. p. 250].
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check Diisooctyl phthalate in the storage compatibility matrix →