Registration Dossier

Diss Factsheets

Physical & Chemical properties

Boiling point

Currently viewing:

Administrative data

Link to relevant study record(s)

Reference
Endpoint:
boiling point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2016-01-27 to 2016-02-12
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
EU Method A.2 (Boiling Temperature)
Version / remarks:
May 31, 2008.
Deviations:
no
Qualifier:
according to guideline
Guideline:
OECD Guideline 103 (Boiling Point)
Version / remarks:
July 27, 1995
Deviations:
no
Qualifier:
according to guideline
Guideline:
EPA OPPTS 830.7220 (Boiling Point / Boiling Range)
Version / remarks:
August 1996
Deviations:
no
GLP compliance:
yes
Type of method:
differential scanning calorimetry
Key result
Decomposition:
yes
Decomp. temp.:
> 275 °C

Preliminary test:

The TGA-curve of the test item is shown in Figure 1 (attached). From 275°C upwards the weight of the sample decreased significantly. At 347°C the sample weight had decreased by 25%.

After the experiment, a yellowish residue remained in the sample container (original colour: light yellow). The change of the colour indicated reaction and/or decomposition of the test item.

Main study:

The DSC-curve obtained during Experiment 1 is shown in Figure 2 (attached). During cooling no effects were observed which could be attributed to crystallization of the test item. During heating, an endothermic peak started from 275°C. The effect was due to reaction and/or decomposition of the test item. Also, during heating a glass transition seemed to be present at -50°C. Since a glass transition was not observed during cooling the experiment was repeated. After the experiment, an orange/pink residue remained in the sample container.

Experiment 2 was performed as a duplicate of Experiment 1 with a similar temperature program. Figure 3 (attached) shows the DSC-curve obtained. During heating, no glass transition was observed. An obvious decrease in heat flow was observed from 200°C onwards. After the experiment, an orange/pink residue remained in the sample container.

Conclusions:
The test substance was observed to undergoes thermal decomposition from 275°C at 1013 hPa using a relevant test method and in compliance with GLP. The result is considered to be reliable.

Description of key information

Boiling point: the substance undergoes thermal decomposition (OECD 103)

Key value for chemical safety assessment

Additional information

An attempt was made to conduct a boiling point study for the submission substance using differential scanning calorimetry (DSC) in accordance with OECD Test Guideline 103 and in compliance with GLP. The submission substance was observed to undergo thermal decomposition and/or reaction at temperatures >275°C (>548K). The result is considered to be reliable.