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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:
28 Jun - 19 Jul 2017
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Reason / purpose:
reference to same study
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
Key result
Boiling pt.:
325.9 °C
Atm. press.:
1 013 hPa
Decomposition:
no

Results

In the temperature range of -40 to -30 °C, a small endothermic effect (melting) was observed. Between approx. 190 - 340 °C a second endothermic effect (boiling) could be detected. No further thermal effects were observed up to the test end temperature of 500 °C.

 

Results of the DSC-measurements

No.

Sample weight / mg

Onset of Effect / °C

Range of effect / °C

Weight loss / mg

Atmospheric pressure / hPa

PN13684

13.28

-38.10 324.88

-40 to -30 (endo)

190 - 340 (endo)

13.24

985.4

PN13685

10.57

-36.56 324.13

-40 to -30 (endo)

210 - 340 (endo)

10.53

985.4

 

During the cooling phase, no thermal effects were observed, which can be assigned to the freezing of the test item. During the heating phase a small endothermic effect was observed in the temperature range of -40 to -30 °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. 190 - 340 °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. Ketone). A correction value φ = 5.2 was used for the temperature of 320 - 330 °C.

The lowest measured onset temperature is corrected to the standard pressure to be 325.52 °C and the highest onset temperature to be 326.27 °C. As the corrected onset temperatures in both tests deviate less than 0.5 K from their mean value of 325.90 °C, the test item has a boiling point of 325.9 °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 325.9 °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 325.9 °C (at 1013 hPa) was determined for the test substance according to EU Method A.2

Description of key information

Boiling point: 325.9 °C at 1013 hPa (EU Method A.2, differential scanning calorimetry)

Key value for chemical safety assessment

Boiling point at 101 325 Pa:
325.9 °C

Additional information

The boiling point has been corrected to normal pressure (1013.25 hPa) using the H.N. Hass and R.F. Newton equation.