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Boiling point

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Reference
Endpoint:
boiling point
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 103 (Boiling point/boiling range)
Deviations:
no
Qualifier:
according to guideline
Guideline:
EU Method A.2 (Boiling Temperature)
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
method according to Siwoloboff
Remarks:
and differential scanning calorimetry (for confirmatory purposes)
Key result
Atm. press.:
1 004 mBar
Decomposition:
yes
Decomp. temp.:
> 100 °C
Remarks on result:
other: Boiling point not determinable; test material decomposes at temperatures above approx. 100 °C before boiling

As the boiling tube was heated, evolution of gas was noted from the body of the liquid, indicating decomposition. It was difficult to ascertain the onset of this apparent decomposition and DSC was examined to elucidate.

The DSC trace showed an endotherm at approximately 40°C due to melting of the test substance, followed by a large exotherm (onset approximately 100˚C), consistent with decomposition of the sample (which was observed to be a black solid after testing).

Description of key information

The test material decomposes above approx. 100°C before boiling (OECD 103, EU A.2)

Key value for chemical safety assessment

Additional information

The boiling temperature of the test material was not determinable, as the test substance decomposed at temperatures above approximately 100°C before boiling.