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Physical & Chemical properties

Boiling point

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boiling point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2012-02-28 - 2012-03-06
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
according to guideline
EU Method A.2 (Boiling Temperature)
GLP compliance:
yes (incl. QA statement)
Type of method:
other: method according to Siwoloboff and Differential Scanning Calorimetry
Key result
Atm. press.:
102.6 kPa
Decomp. temp.:
137 °C

Full test results:

Run 1: Discolouration of the sample began from 224.6°C. Bubbles were observed around 242.6°C, but no boiling was observed up to 270°C. The test was then terminated as discolouration of the sample prevented further observations.

Run 2: Discolouration and bubbles were both first observed around 250°C and a boiling temperature of 288.7°C was obtained.

Results of the Differential Scanning Calorimetry:

Test A:

The test was conducted in an open aluminium crucible. This test was inconclusive (a run-away event began at 170°C). A second test was conducted in a gold crucible in order to more accurately determine the onset temperatures for the energetic events.

Test B:

The test was conducted in a sealed gold crucible. The sample was observed to undergo an exothermic event (decomposition) from 136.7 °C which had a heat of decomposition of -18.1 J/g. No further significant energetic events were noted up to 500°C.

The test results indicate that the material decomposes before it boils.

The test results indicate that the substance decomposes at 137°C, before it boils.

Description of key information

Decomposition of the test substance occurred at 137°C in a GLP study according to EU Method A.2 (Boiling temperature), using the Siwoloboff and Differential Scanning Calorimetry methods (Younis S, 2012). Therefore, no boiling point could be determined.

Key value for chemical safety assessment

Additional information

No boiling point could be determined.