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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:
other: Guideline study
Qualifier:
according to
Guideline:
OECD Guideline 103 (Boiling point/boiling range)
Deviations:
not specified
GLP compliance:
no
Type of method:
differential scanning calorimetry
Boiling pt.:
> 220 °C
Atm. press.:
1 020 hPa
Decomposition:
yes
Decomp. temp.:
>= 220 °C

In the DSC experiment no peaks could be seen up to 220 °C that could be allocated to a boiling point.

In the TGA test a sample of the test item was heated from 30 °C to 675 °C in an inert gas atmosphere (N2). Between 30 °C and 90 °C it lost 2.4 % of its weight, which can be attributed to the evaporation of residual water and solvent.

In the TGA experiment an increasing weight loss was recorded above 90 °C, at 250.8 °C (onset temperature) the weight continuously decreased and reached a loss of approx. 92 % at 580 °C.

In the visual inspection it was observed that starting from 220 °C the sample becomes brownish, at 260 °C the specimen was completely black. This observation indicates a degradation process and corresponds with the observations made in the TGA experiment.

Conclusions:
No boiling point could be determined by means of the capillary method, DSC and TGA. Instead TGA and visual inspection indicate decomposition of the substance at a temperature of >= 220 °C.
Executive summary:

The boiling point of the substance was determined according to OECD Guideline 103 by means of DSC, TGA and capillary method. In all cases no boiling point could be observed at temperatures up to 250 °C.

In the TGA experiment an increasing weight loss was recorded above 90 °C, at 250.8 °C (onse>t temperature) the weight continuously decreased and reached a loss of approx. 92 % at 580 °C.

In the visual inspection it was observed that starting from 220 °C the sample becomes brownish, at 260 °C the specimen was completely black. This observation indicates a degradation process and corresponds with the observations made in the TGA experiment.

It can be concluded that no boiling point can be determined. The substance decomposes at a temperature of >= 220 °C.

Description of key information

No boiling point could be determined by means of the capillary method, DSC and TGA. Instead TGA and visual inspection indicate decomposition of the substance at a temperature of >= 220 °C.

Key value for chemical safety assessment

Additional information