Substance profile
Diisobutyl phthalate
Diisobutyl phthalate is a liquid.
01 · Identification
What Diisobutyl phthalate is
Diisobutyl phthalate is a liquid. Its molecular formula is C16H22O4 and its molecular weight is 278.34 g/mol. It boils at 320 °C, melts at -64 °C, is soluble in water.
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 |
|---|---|
| H360Df | May damage the unborn child. Suspected of damaging fertility. |
03 · Physical and chemical properties
Diisobutyl 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 | 320 °C (608 °F) | ICSC | |
| 296.39 °C (565.5 °F) | range, midpoint shown, at 760 mmHg | CAMEO | |
| 296.5 °C (565.7 °F) | at 4 mmHg (reduced pressure) | HSDB | |
| Melting point | -64 °C (-83.2 °F) | HSDB | |
| -63.89 °C (-83 °F) | CAMEO | ||
| -37 °C (-34.6 °F) | ICSC | ||
| Density | 1.04 g/cm³ | ICSC | |
| 1.047 g/cm³ | at 20 °C | CAMEO | |
| 1.049 g/cm³ | at 15 °C | HSDB | |
| Solubility | Phthalate esters are soluble to various extents in many common organic solvents and oils, but have a relatively low solubility in water. | Phthalate esters | HSDB |
| Soluble in carbon tetrachloride | HSDB | ||
| In water, 6.2 mg/L at 24 °C | at 24 °C | HSDB | |
| Vapor pressure | 0.00007501 mmHg | at 20 °C | ICSC |
| 0.0000476 mmHg | at 25 °C | HSDB | |
| 0.0066 mmHg | Haz-Map | ||
| Flash point | 185 °C (365 °F) | Open cup | HSDB |
| 196.11 °C (385 °F) | CAMEO | ||
| 185 °C (365 °F) | ICSC | ||
| Autoignition temperature | 432.22 °C (810 °F) | HSDB | |
| 423 °C (793.4 °F) | ICSC | ||
| Lower explosive limit (LEL) | 0.4 % by volume | CAMEO | |
| 0.4 % by volume | at 231.11 °C | HSDB | |
| Explosive limits , vol% in air: 0.4 | ICSC | ||
| Vapor density | 9.59 (air = 1) | CAMEO | |
| 9.6 (air = 1) | ICSC |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
04 · Handling and storage
Storing and handling Diisobutyl phthalate
Storage conditions
/Store/ separated from strong oxidants.
Source: Hazardous Substances Data Bank (HSDB)
Reactivity
DI-ISOBUTYL PHTHALATE reacts with acids to liberate heat along with isobutyl alcohol and phthalic acid. May react sufficiently exothermically with strong oxidizing acids 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 in handling [Handling Chemicals Safely, 1980. p. 250].
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check Diisobutyl phthalate in the storage compatibility matrix →