Registration Dossier
Registration Dossier
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EC number: 816-312-2 | CAS number: 92343-70-9
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:
- 21 Nov 2014
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Deviations:
- no
- GLP compliance:
- no
- Type of method:
- differential scanning calorimetry
- Key result
- Melting / freezing pt.:
- 27 °C
- Atm. press.:
- 1 013 hPa
- Decomposition:
- no
- Conclusions:
- The test item had a phase transition into the liquid phase at 27°C.
- Executive summary:
A study was conducted according to OECD TG 102 and Regulation (EC) No 440/2008 method A.1 to determine the melting point of the test item using differential scanning calorimetry. The test item was weighed into an aluminium crucible under an inert atmosphere (nitrogen). Three tests with about 9 - 11 mg of the test item were performed. As reference crucible, an empty aluminium crucible was used.
Three DSC measurements in aluminium crucibles with a hole showed an endothermal effect in the temperature range of 20 - 35 °C with onset temperatures of 27 .3 °C, 26.8 °C and 26.9 °C, respectively. The onset temperatures were derived from the intersection of the tangent line with the highest slope of the endothermal peak with the baseline.
The test item appeared as a solified melt prior to the measurements. After the DSC measurement with the final test temperature of 100 °C the test item appeared clear and melted. No mass loss occurred. After the DSC measurements with the final test temperature of 500 °C the aluminium crucibles were empty. In all three measurements the endothermal effect was too small for a typical melting point. Therefore, it was concluded that the test item had a phase transition at 27.0 °C after which the test item was liquid.
Reference
Melting point / melting range: DSC measurement
Three DSC measurements in aluminium crucibles with a hole showed an endothermal effect in the temperature range of 20 - 35 °C with onset temperatures of 27 .3 °C, 26.8 °C and 26.9 °C, respectively. The onset temperatures were derived from the intersection of the tangent line with the highest slope of the endothermal peak with the baseline.
The test item appeared as a solified melt prior to the measurements. After the DSC measurement with the final test temperature of 100 °C the test item appeared clear and melted. No mass loss occurred. After the DSC measurements with the final test temperature of 500 °C the aluminium crucibles were empty. In all three measurements the endothermal effect was too small for a typical melting point. Therefore, it was concluded that the test item had a phase transition at 27.0 °C after which the test item was liquid.
Description of key information
It was concluded that the test item had a phase transition at 27.0 °C after which the test item was liquid.
Key value for chemical safety assessment
Additional information
A study was conducted according to OECD TG 102 and Regulation (EC) No 440/2008 method A.1 to determine the melting point of the test item using differential scanning calorimetry.
Three DSC measurements in aluminium crucibles with a hole showed an endothermal effect in the temperature range of 20 - 35 °C with onset temperatures of 27 .3 °C, 26.8 °C and 26.9 °C, respectively. The onset temperatures were derived from the intersection of the tangent line with the highest slope of the endothermal peak with the baseline.
The test item appeared as a solified melt prior to the measurements. After the DSC measurement with the final test temperature of 100 °C the test item appeared clear and melted. No mass loss occurred. After the DSC measurements with the final test temperature of 500 °C the aluminium crucibles were empty. In all three measurements the endothermal effect was too small for a typical melting point. Therefore, it was concluded that the test item had a phase transition at 27.0 °C after which the test item was liquid.
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