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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:
24 October 2016
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Reference:
Composition 0
Qualifier:
according to
Guideline:
EU Method A.2 (Boiling Temperature)
Qualifier:
according to
Guideline:
OECD Guideline 103 (Boiling Point)
Qualifier:
according to
Guideline:
EPA OPPTS 830.7220 (Boiling Point / Boiling Range)
GLP compliance:
no
Type of method:
differential scanning calorimetry
Test material information:
Composition 1
Key result
Boiling pt.:
243.4 °C
Atm. press.:
1 013.25 hPa
Decomposition:
no

Results

In the temperature range of 50 - 70 °C an endothermic effect (melting), was observed. Between approx. 160 - 270 °C a second endothermic effect (boiling) could be detected.

Table 1: Results of the DSC-measurements

 

No.

Sample weight / mg

Onset of Effect / °C

Range of effect / °C

Weight loss / mg

Atmospheric pressure / hPa

PN12079

15.78

52.32

243.00

50 - 70 (endo)

170 - 270 (endo)

15.72

1001.1

PN12080

16.77

51.65

242.70

50 - 70 (endo)

160 - 260 (endo)

16.77

1001.1

 

During the heating phase an endothermic effect was observed in the temperature range of 50 - 70 °C, which can be assigned to the melting of the test item.

The test item showed a second endothermic signal in the temperature range of approx. 160 - 270 °C that can be assigned to the boiling of the test item.

For the correction of the boiling temperature to standard pressure the test item was assigned to chemical group 2 (e.g. Hydrocarbons). A correction value φ = 5.05 was used for the temperature of 240 - 250 °C.

The lowest measured onset temperature is corrected to the standard pressure to be 243.23 °C and the highest onset temperature to be 243.53 °C. As the corrected onset temperatures in both tests deviate less than 0.5 K from their mean value of 243.38 °C, the test item has a boiling point of 243.4 °C.

No further thermal effects were observed up to the maximum test temperature of 500 °C.

 

Final Results

The test item has a boiling point of 243.4 °C corrected to normal atmospheric pressure (1013 hPa) as determined by differential scanning calorimetry according to Regulation EC No. 440/2008 Method A.2. and OECD Test Guideline 103 (1995).

Conclusions:
A boiling point of 243.4 °C (at 1013 hPa) was determined for the test substance according to EU Method A.2

Description of key information

Boiling point: 243.4 °C at 1013 hPa (EU Method A.2, differential scanning calorimetry)

Key value for chemical safety assessment

Boiling point at 101 325 Pa:
243.4 °C

Additional information