Registration Dossier
Registration Dossier
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EC number: 246-618-6 | CAS number: 25103-54-2
Melting point / freezing point
Administrative data
Link to relevant study record(s)
- Endpoint:
- melting point/freezing point
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 5 October 2017 - 9 November 2017
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Version / remarks:
- July 27, 1995
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Version / remarks:
- March 04, 2016
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- differential scanning calorimetry
- Specific details on test material used for the study:
- SOURCE OF TEST MATERIAL
- Source and lot/batch No. of test material: 1704HH0700/0
- Expiration date of the lot/batch: 29th April 2018
- Purity test date: Not indicated
STABILITY AND STORAGE CONDITIONS OF TEST MATERIAL
- Storage condition of test material: Room temperature
- Stability under test conditions: No specific conditions required - Melting / freezing pt.:
- -75.5 °C
- Remarks on result:
- other: Glass transition
- Conclusions:
- The melting point of the test item could not be determined. A glass transition of the test item was observed at -75.5°C.
- Executive summary:
Reingruber (2017) is a GLP-compliant study following OECD guideline 102 and is therefore reliable without restrictions (Klimisch 1). Differential scanning calorimetry was used, but no melting point could be determined for the test item. A glass transition of the test item was observed at -75.5°C.
Reference
During cooling, a glass transition between -90°C and -60°C was found. During heating a glass transition was observed between -90°C and -50°C. The inflection point of the glass transition could not be determined since the effect occurred directly after starting the heating cycle.
In order to investigate theglass transition, a lower cooling rate of 1°C/minute and a lower heating rate of 5°C/minute were applied in the Experiment 2 and Experiment 3. The inflection points of the glass transition were -75.305°C (Experiment 1) and -75.654°C (Experiment 2). After the experiment, the sample appeared unchanged, i.e. no signs of decomposition were observed.
The glass transition temperature was determined as the mean glass transition temperature of Experiment 2 (-75.305°C) and Experiment 3 (-75.654°C).
Description of key information
The melting point of the test item could not be determined. A glass transition of the test item was observed at -75.5°C.
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- -75.5 °C
Additional information
Reingruber (2017) is a GLP-compliant study following OECD guideline 102 and is therefore reliable without restrictions (Klimisch 1). Differential scanning calorimetry was used, but no melting point could be determined for the test item. A glass transition of the test item was observed at -75.5°C.
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