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Boiling point

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Reference
Endpoint:
boiling point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2015
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
Guideline:
OECD Guideline 103 (Boiling Point)
Deviations:
no
Qualifier:
according to guideline
Guideline:
EU Method A.2 (Boiling Temperature)
Deviations:
no
Qualifier:
according to guideline
Guideline:
EPA OPPTS 830.7220 (Boiling Point / Boiling Range)
Deviations:
no
GLP compliance:
yes
Type of method:
differential scanning calorimetry
Boiling pt.:
284 °C
Atm. press.:
1 019 hPa
Decomposition:
no
Remarks on result:
other: mean boiling point (n = 2); measurement under flow of nitrogen ; atmospheric pressure was 1019 ± 5 hPa.

Main study

- Experiment 1: During cooling no effects were observed which were due to crystallization of the test item.During heating, an endothermic peak between 200°C and 325°C was observed. The extrapolated onset temperature of the peak was 283.72°C.

- Experiment 2: Was conducted to examine the boiling temperature using a hermetically closed sample container. The endothermic peak shifted to higher temperatures. It demonstrated that evaporation of the test substance was the reason for the endothermic effect.

- Experiment 3: Was conducted to further examine the boiling temperature of the test item in duplicate. An endothermic peak was observed. The extrapolated onset of the evaporation peak was 284.05°C.

 

The mean result of experiment 1 and 3 was considered to be the boiling point: 284 °C (557 K).

Conclusions:
The boiling temperature of the test item has been determined to be 284 °C (or 557 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 284 ± 0.5 °C (557 ± 0.5 K).

Description of key information

Bp: 284 ± 0.5 °C (or 557 ± 0.5 K) at ca. 1 atmosphere pressure, OECD TG 103 - DSC method, 2015

Key value for chemical safety assessment

Boiling point at 101 325 Pa:
284 °C

Additional information

Key Study : OECD TG 103, 2015 : 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 284 ± 0.5 °C (557 ± 0.5 K).

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