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Boiling point

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boiling point
Type of information:
experimental study
Adequacy of study:
key study
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: 1c: Test procedure in accordance with international standard ASTM E1782
according to
other: ASTM E1782
GLP compliance:
not specified
Type of method:
dynamic method
Boiling pt.:
374.15 °C
Atm. press.:
1 022 mBar
Boiling pt.:
363.52 °C
Atm. press.:
750 mBar
Boiling pt.:
352.76 °C
Atm. press.:
500 mBar
Boiling pt.:
333.82 °C
Atm. press.:
250 mBar

The low pressures tested give different boiling point for DOP. The relationship between these data give a linear regression (see figure 1) that follows the equation:

ln P (mbar) = [- 13848 / T (°K)] + 28.348
In the test condition boiling point of DOP (=DEHP) is 374.15°c at atmospheric pressure (1022 mbar)
Executive summary:

According to the ASTM E1782 standard, boiling point of dioctylphthalte (= DEHP) has been measured in a dynamic method under low pressure.

The relationship between temperature and pressure is the following :

ln P (mbar) = [- 13848 / T (°K)] + 28.348

This relationship is linear.

In the test condition boiling point of DEHP at atmospheric pressure (1022 mbar) is 374.15°C

As the study follows an international standard, this study is considered as reliable without restriction.

Description of key information

Boiling point:  374.15°C at 1022 mbar (ASTM E1782 standard: dynamic method under low pressure)

Key value for chemical safety assessment

Boiling point at 101 325 Pa:
647 K

Additional information

Five data are available for boiling point of DEHP.

The key study, CCRA, 2008, is an experimental study according to ASTM E1782 standard.

All other data are cited from reference handbooks and are consistent with the value of the key study. Therefore these data are considered as supportive studies.

- Rippen, 2000:  385 °C at 1013 hPa

- Verschueren, 384 at 1013 hPa

- Patty, 1994: 230°C at ca 664 Pa (5 mmHg)

- BUA, 1986: 230-233°C °C at 5 mbar , DIN 53 406, not distillable at 1030 mbar.