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Physical & Chemical properties

Boiling point

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Reference
Endpoint:
boiling point
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: Guideline study performed under GLP. All relevant validity criteria were met.
Qualifier:
according to
Guideline:
OECD Guideline 103 (Boiling Point)
Deviations:
no
Qualifier:
according to
Guideline:
EU Method A.2 (Boiling Temperature)
Deviations:
no
Qualifier:
according to
Guideline:
EPA OPPTS 830.7220 (Boiling Point / Boiling Range)
Deviations:
no
GLP compliance:
yes (incl. certificate)
Remarks:
inspected: September 2015; signature: November 2015
Type of method:
differential scanning calorimetry
Boiling pt.:
338.2 °C
Atm. press.:
1 004 hPa
Decomposition:
no
Remarks on result:
other: mean boiling point (n=2); measurement under flow of nitrogen

Main study

- Experiment 1: An endothermic effect was observed between 250°C and 350°C. The endothermic effect was probably obtained due to boiling of the test item.

- Experiment 2: A duplicate DSC was performed to determine the duplicate melting and boiling temperatures of the test item. A lower cooling rate of -1°C/minute and a higher heating rate of 50°C/minute was used from 25°C with more test item. The endothermic peak had not shifted to higher temperatures. It demonstrated that boiling of the test item caused the endothermic effect. The extrapolated onset temperature of the boiling peak was 340.411°C. Since a higher heating rate was used the extrapolated onset temperature of the boiling peak was not used for calculation of the boiling temperature.

- Experiment 3: Using conditions similar to Experiment 2, from 250°C, an endothermic peak was observed. The extrapolated onset of the boiling peak was 338.063°C.

- Experiment 4: Similar results as in Experiment 3 were obtained. The extrapolated onset of the boiling peak was 338.372°C.

The mean result of experiment 3 and 4 was considered to be the boiling point: 338.2°C (611.4K).

Conclusions:
The boiling temperature of the test item has been determined to be 338.2 ± 0.5 °C (or 611.4 ± 0.5 K).
Executive summary:

The boiling temperature was examined using OECD TG 103 and EU Method A.2. with the Differential Scanning Calorimetry method under GLP. The guideline defines the standard boiling temperature as the temperature at which the vapour pressure of a liquid is the same as the standard pressure (i.e. 1013.25 hPa). The boiling temperature of the test item were determined as the mean boiling temperature obtained from two experiments; from which the thermal events for each individual DSC-runs were within ±0.5°C of the determined mean. The mean boiling point was 338.2 ± 0.5 °C (611.4 ± 0.5 K).

Description of key information

Bp: 338.2 ± 0.5 °C (or 611.4 ± 0.5 K) at ca. 1 atmosphere pressure, OECD TG 103 - DSC method, 2017

Key value for chemical safety assessment

Boiling point at 101 325 Pa:
338.2 °C

Additional information

The boiling temperature was examined using OECD TG 103 and EU Method A.2. with the Differential Scanning Calorimetry method under GLP. The guideline defines the standard boiling temperature as the temperature at which the vapour pressure of a liquid is the same as the standard pressure (i.e. 1013.25 hPa). The boiling temperature of the test item were determined as the mean boiling temperature obtained from two experiments; from which the thermal events for each individual DSC-runs were within ±0.5°C of the determined mean. The mean boiling point was 338.2 ± 0.5 °C (611.4 ± 0.5 K).