Registration Dossier

Physical & Chemical properties

Melting point / freezing point

Currently viewing:

Administrative data

Link to relevant study record(s)

Reference
Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2015-02-27 till 2015-07-22
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Deviations:
no
Qualifier:
according to
Guideline:
other: OECD Guidelines for Testing of Chemicals, Section 1 – Physical-Chemical Properties No: 113 “Screening Test for Thermal Stability and Stability in Air ” (adopted, 12th May 1981).
Deviations:
no
Qualifier:
according to
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Deviations:
no
GLP compliance:
yes (incl. certificate)
Type of method:
thermal analysis
Remarks on result:
not determinable

Result:

From -100 °C up to 450 °C no melting point could be observed but a glass transition temperature at -82.6 °C. Between approx. 90 °C and approx. 240 °C a slight exothermic effect was observed. From approx. 250 °C up to 450 °C additional endothermic and exothermic effects could be observed. After the heating process a brownish residue remains in the crucible which indicates a decomposition of the test item.

Conclusions:
From -100 °C up to 450 °C no melting point could be observed but a glass transition temperature at -82.6 °C. Between approx. 90 °C and approx. 240 °C a slight exothermic effect was observed. From approx. 250 °C up to 450 °C additional endothermic and exothermic effects could be observed. After the heating process a brownish residue remains in the crucible which indicates a decomposition of the substance.
Executive summary:

The melting point of the substance was determined according the OECD Gudieline 102 /113 and EU method A.1. By means of Differential Thermal Analysis (DTA) / Differential Scanning Calorimetry (DSC): The sample was weighed in a crucible made of aluminium with perforated lid and placed in a DTA/DSC-system. The sample was cooled down in a DTA/DSC-system to -100 °C, hold for 3 minutes and then heated up to 450 °C (heating rate 5 K/min).

In comparison with an inert sample (empty crucible) the temperature difference and the heat effect is recorded. Any thermal effect corresponds to a baseline deviation.

From -100 °C up to 450 °C no melting point could be observed but a glass transition temperature at -82.6 °C. Between approx. 90 °C and approx. 240 °C a slight exothermic effect was observed. From approx. 250 °C up to 450 °C additional endothermic and exothermic effects could be observed. After the heating process a brownish residue remains in the crucible which indicates a decomposition of the test item.

Description of key information

From -100 °C up to 450 °C no melting point could be observed but a glass transition temperature at -82.6 °C. Between approx. 90 °C and approx. 240 °C a slight exothermic effect was observed. From approx. 250 °C up to 450 °C additional endothermic and exothermic effects could be observed. After the heating process a brownish residue remains in the crucible which indicates a decomposition of the substance.

Key value for chemical safety assessment

Additional information