Registration Dossier

Administrative data

Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
31 July 2018 - 19 April 2019
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Cross-reference
Reason / purpose:
reference to same study
Reference
Endpoint:
boiling point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
31 July 2018 - 19 April 2019
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Reason / purpose:
reference to same study
Qualifier:
according to
Guideline:
EU Method A.2 (Boiling Temperature)
Version / remarks:
2016
Deviations:
no
Qualifier:
according to
Guideline:
OECD Guideline 103 (Boiling Point)
Version / remarks:
1995
Deviations:
no
Qualifier:
according to
Guideline:
EPA OPPTS 830.7220 (Boiling Point / Boiling Range)
Version / remarks:
1996
Deviations:
no
GLP compliance:
yes
Type of method:
differential scanning calorimetry
Key result
Decomposition:
yes
Decomp. temp.:
> 175 °C
Remarks on result:
other: boiling point not determinable

Two experiments were performed to investigate the (melting and) boiling behaviour of the substance, of which only Experiment 1 is relevant for the boiling point.

 

DSC EXPERIMENT 1

During cooling a glass transition was observed between -70°C and -90°C. During heating a glass transition was observed between -90°C and -50°C. The inflection point of the glass transition is -73.719°C. A broad endothermic effect was observed between 25°C and 175°C directly followed by another endothermic effect. The first endothermic effect was most likely caused by evaporation of impurities (see endpoint 4.2). The second endothermic effect was probably caused by reaction and/or decomposition of the test item.

After the experiment, a dark orange molten residue remained in the sample container (original colour: brown, more orange like). The change of the colour indicated reaction and/or decomposition of the test item.

CONCLUSION

Reaction and/or decomposition of the test item was observed in the DSC experiments at temperatures of > 175°C (> 448K) and at normal atmospheric pressure (1013.25 hPa). 

Boiling of the test item was not observed below the temperature at which reaction and/or decomposition started. Based on this, the test item has no boiling temperature.

Conclusions:
Reaction and/or decomposition of the substance was observed in DSC experiments, starting at > 175°C.
The substance has no boiling point.

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2019

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Version / remarks:
2016
Deviations:
no
Qualifier:
according to
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Version / remarks:
1995
Deviations:
no
Qualifier:
according to
Guideline:
EPA OPPTS 830.7200 (Melting Point / Melting Range)
Version / remarks:
1998
Deviations:
no
GLP compliance:
yes
Type of method:
differential scanning calorimetry

Test material

Reference
Name:
Unnamed
Type:
Constituent
Test material form:
liquid: viscous
Details on test material:
- Appearance: Brown viscous liquid
- Storage condition of test material: At room temperature

Results and discussion

Melting / freezing point
Key result
Melting / freezing pt.:
-73.8 °C
Decomposition:
yes
Decomp. temp.:
> 175 °C
Remarks on result:
other: glass transition is reported as substance has no melting temperature

Any other information on results incl. tables

Two experiments were performed to investigate the melting (and boiling) behaviour of the substance.

 

DSC EXPERIMENT 1

During cooling a glass transition was observed between -70°C and -90°C. During heating a glass transition was observed between -90°C and -50°C. The inflection point of the glass transition is -73.719°C. A broad endothermic effect was observed between 25°C and 175°C directly followed by another endothermic effect. The first endothermic effect was most likely caused by evaporation of impurities. The second endothermic effect was probably caused by reaction and/or decomposition of the test item (see endpoint 4.3).

 

DSC EXPERIMENT 2

In order to investigate the first endothermic effect, in Experiment 2 heating was stopped directly after the first endothermic effect. Similar results as in Experiment 1 were obtained. The inflection point of the glass transition was -73.901°C. After the experiment, the remaining residue in the sample container seemed unchanged. It demonstrated that the first endothermic effect was most likely caused by evaporation of impurities.

 

DATA HANDLING

The glass transition was determined as the mean inflection point of Experiment 1 (-73.719°C) and Experiment 2 (-73.901°C).

Applicant's summary and conclusion

Conclusions:
A glass transition temperature of -73.8°C was determined.
The substance has no melting/freezing temperature between 25°C and -90°C.