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Physical & Chemical properties

Melting point / freezing point

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Reference
Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
15 January 2018 to 7 February 2018
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Reference:
Composition 0
Qualifier:
according to
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Version / remarks:
27 July 1995
Deviations:
no
GLP compliance:
yes (incl. certificate)
Other quality assurance:
ISO/IEC 17025 (General requirements for the competence of testing and calibration laboratories)
Type of method:
differential scanning calorimetry
Test material information:
Composition 1
Specific details on test material used for the study:
Test Item
Appearance: Clear light amber liquid
Purity/Composition: >90%
Test item storage: At room temperature


Additional information
Test Facility test item number: 209077/A
Purity/Composition correction factor: No correction factor required
Test item handling: No specific handling conditions required
Molecular structure: Not indicated
Molecular formula: C63H110O12
Molecular weight: 1059

Test Item Characterization
The Sponsor provided to the Test Facility documentation of the identity, purity, composition, and stability for the test item(s).
Melting / freezing pt.:
ca. 197.3 K
Atm. press.:
ca. 1 013 hPa
Remarks on result:
other: Glass transition
Melting / freezing pt.:
-75.9 °C
Atm. press.:
1 013 hPa
Remarks on result:
other: Glass transition

Preliminary test

The TGA curve of the test item is shown inFigure 1. Starting at 350°C, the weight of the sample decreased significantly. At 410°C, the sample weight had decreased by 25%.

After the experiment, a yellow molten residue remained in the sample container (original colour: colourless) and a yellow residue was observed on the lid of the sample container. The change of the colour indicated reaction and/or decomposition of the test item.

Main study

The DSC curve obtained with Experiment 1 is shown inFigure 2. During cooling a glass transition was observed between -60°C and -80°C. During heating aglass transition was observed between -90°C and -50°C followed by an endothermic effect starting at 250°C. The inflection point temperature of the glass transition was -75.782°C. The endothermic effect was probably obtained due to reaction and/or decomposition of the test item.

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

Experiment 2 was performed as a duplicate of Experiment 1. Figure 3shows the DSC curve obtained. Similar results as in Experiment 1 were obtained. The inflection point of the glass transition was -76.001°C. After the experiment, a colourless residue remained in the sample container. 

The glass transition was determined as the mean inflection point of Experiment 1 (-75.782°C) and Experiment 2 (-76.001°C).

Conclusions:
The glass transition was determined as the mean inflection point of Experiment 1 (-75.782°C) and Experiment 2 (-76.001°C) at 1013 hPa.
Executive summary:

In this guideline (OECD 102) study, conducted with GLP certification, no melting point was determined. A glass transition of the test item was observed at -75.9°C (197.3K).

Description of key information

Study performed to recognised study guidelines with GLP certification.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
-75.9 °C

Additional information