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Diss Factsheets

Physical & Chemical properties

Boiling point

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Administrative data

Link to relevant study record(s)

Reference
Endpoint:
boiling point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
Study Initiation date* 18/02/2019
Start Date of Experimental Work 20/02/2019
Completion Date of Experimental Work 20/05/2019
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
test procedure in accordance with generally accepted scientific standards and described in sufficient detail
Qualifier:
no guideline required
Principles of method if other than guideline:
The sample to be tested is placed in a 3-neck 250 cm3 round-bottom flask held within a heating mantle. One neck provides access for a thermocouple (connected to an electronic thermometer); the middle neck provides connection to a vacuum system; the third neck provides a means of connecting the flask to an electronic pressure gauge.

The test procedure involves evacuating the system to a suitably low pressure whilst the flask and contents are slowly heated. The pressure and temperature are taken when the liquid boils and the process is continued up to prevailing atmospheric pressure. Using the Clapeyron-Clausius equation it is possible to calculate the latent heat of evaporation of the liquid and the boiling point temperature at the required standard pressure of 101.325
kPa.

System calibrated with demineralised water.
GLP compliance:
yes
Type of method:
dynamic method
Key result
Boiling pt.:
168 °C
Atm. press.:
101.325 kPa

Sample boiling point at 101.325 kPa = 168 °C. Latent heat of evaporation of sample = 43.9 kJ mol-1.

Conclusions:
Sample boiling point at 101.325 kPa was determined as 168 C.

Description of key information

Boiling point of the substance was determined as 168 °C (Dekra report)

Key value for chemical safety assessment

Boiling point at 101 325 Pa:
168 °C

Additional information

With Clapeyron-Clausius equation the latent heat of evaporation of the liquid was calculated and the boiling point temperature (168 °C) at the required standard pressure of 101.325 kPa was obtained.