Registration Dossier

Administrative data

Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2018

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
GLP compliance:
yes
Type of method:
differential scanning calorimetry

Test material

Reference
Name:
Unnamed
Type:
Constituent

Results and discussion

Melting / freezing pointopen allclose all
Key result
Decomposition:
yes
Decomp. temp.:
>= 122.7 - <= 151.7 °C
Remarks on result:
not determinable because of methodological limitations
Key result
Decomposition:
yes
Decomp. temp.:
>= 236.9 - <= 244 °C

Any other information on results incl. tables

A first pre-test was conducted and the test item appeared to be degraded at the end of measurements. To confirm that peaks observed during this pretest correspond to thermal degradation and not to transition phases, two more tests were performed and corresponding thermograms were obtained. Moreover the crucible was observed and opened at the end of each trial and the appearance of the test item was checked.

No melting point or boiling point was determined as the substance started degrading above 122.7°C.

This degradation happens in two steps. A first degradation occurs between 122.7 °C and 151.7°C during which the test item colour becomes darker.

The second degradation happens between 236.9°C and 244.0°C. The test item changes into a black carbonised powder. It stays under this form up to 550°C.

For each of these degradations, the test item mass decreases and thus indicates an emission of volatile compounds during the degradation process.

Moreover, the melting point of the Indium respects the checking cards limits(156.5°C for a reference value of 156.6°C) so as its enthalpy(27.94 J/g for a reference value of 28.6 J/g).

Applicant's summary and conclusion

Conclusions:
The substance degrades upon heating: it becomes darker between 122.7 - 151.7°C and turns into a black carbonized powder between 236.9 – 244.0°C. No melting point or boiling point was observed up to 550°C. However a mass loss was observed for each of theses degradation peaks and thus indicates an emission of volatile compounds.