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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:
2017-03-14 to 2017-05-16
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
OECD Guideline 103 (Boiling Point)
Version / remarks:
adopted 27 July 1995
Deviations:
no
Qualifier:
according to
Guideline:
EU Method A.2 (Boiling Temperature)
Version / remarks:
30 May, 2008
Deviations:
no
GLP compliance:
yes (incl. certificate)
Type of method:
differential scanning calorimetry
Key result
Decomposition:
yes
Remarks:
as indicated by one sharp peak at 250°C
Decomp. temp.:
> 250 °C
Remarks on result:
other: Partial decomposition and possible boiling thereafter; due to incomplete mass loss no boiling point was detected

Preliminary test:

Three steps were registered with maxima at 120 °C, 270 °C resp. 470 °C. A total mass loss of 53.2 % at the final temperature could be observed (mass change in the range until 180 °C: 0.9 %; mass change in the range from 180 to 360 °C: 2.0 %, mass change in the range from 360 °C to 600 °C: 50.4 %;). No significant mass loss occurred due to purging.

Main test:

The DSC measurements were performed twice in the temperature range from 20 - 600 °C resp. from 20 - 350 °C.

Upon further heating, i.e. above the melting point, the DSC-curve showed two more peaks: one exothermic peak (peak maximum: 250 °C/ 251 °C) followed by an endothermic peak (peak maximum: 471 °C).

The first one is probably due to exothermic decomposition after melting. The second one may be a result of a partial boiling of the decomposed test item.

Due to the fact that the thermogravimetric measurement as well as the DSC-measurement did not show a complete mass loss in that temperature range, no normal boiling point could be observed.

Conclusions:
In the present study according to OECD Guideline 103, the test item is considered to decompose before boiling.

Description of key information

- OECD 103 guideline study, GLP, test item decomposes, no Boiling Point determinable.

Key value for chemical safety assessment

Additional information

In the present study according to OECD Guideline 103, the test item is considered to decompose before boiling.