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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:
04.-05.07.2017
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 103 (Boiling Point)
Qualifier:
according to guideline
Guideline:
EU Method A.2 (Boiling Temperature)
GLP compliance:
no
Type of method:
differential scanning calorimetry
Key result
Boiling pt.:
>= 302 - <= 310 °C
Atm. press.:
1 013 hPa
Decomposition:
yes
Remarks on result:
other: the test item boiled under or after decomposition

Two DSC measurements in aluminium crucibles with a hole showed an endothermal effect after the melting in the temperature range of 290 - 320 °C. The onset temperature (see Table 1) was derived from the intersection of the tangent line with the highest slope of the endothermal peak with the baseline. No further endothermic or exothermic effects were observed up to the final temperature (500 °C). The mass loss after the DSC measurements amounted to 100 %.


Table 1: Boiling point (DSC measurements)




































Ident No.



Test item/ mg



Starting temperature / °C



Final test temperature / °C



Temperature range (melting) / °C



Onset / °C



Crucible



Observations after the measurement



36349



15.88



25



500



280 – 330



302.52



Aluminium with a hole



Mass loss 100 %



36357



21.95



25



400



290 – 325



309.08



Aluminium with a hole



Brown residue, Mass loss 99 %



The test item had a boiling range of 302 - 310 °C. It boiled under or after decomposition.

Conclusions:
The boiling point of the test substance was in the range 302 -310 °C. The substance boiled under or after decomposition.
Executive summary:

A study was conducted according to OECD test guideline 103 and Regulation (EC) No 440/2008 method A.2 to determine the boiling point of the test item using differential scanning calorimetry (DSC 25 -500 °C). The test item and the reference are heated up from the starting temperature to the final temperature at a constant heating rate in a defined atmosphere (nitrogen). Open crucibles are used as containers for the test item and as empty reference crucible. The quantity of heat absorbed or released is measured and recorded. The boiling point of the test substance was in the range 302 -310 °C. The substance boiled under or after decomposition.

Description of key information

A study was conducted according to OECD test guideline 103 and Regulation (EC) No 440/2008 method A.2 to determine the boiling point of the test item using differential scanning calorimetry (DSC 25 - 500 °C). The test item and the reference are heated up from the starting temperature to the final temperature at a constant heating rate in a defined atmosphere (nitrogen). Open crucibles are used as containers for the test item and as empty reference crucible. The quantity of heat absorbed or released is measured and recorded. The boiling point of the test substance was in the range 302 - 310 °C. The substance boiled under or after decomposition.

Key value for chemical safety assessment

Additional information