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EC number: 911-490-9 | CAS number: -
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:
- November 27th, 2012 - April 7th, 2013
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Version / remarks:
- (2008)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Version / remarks:
- (1995)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EPA OPPTS 830.7200 (Melting Point / Melting Range)
- Version / remarks:
- (1998)
- Deviations:
- no
- GLP compliance:
- yes
- Type of method:
- thermal analysis
- Remarks:
- (differential scanning calorimetry)
- Key result
- Melting / freezing pt.:
- -38 °C
- Remarks on result:
- other: Glass transition instead of melting. Temp: 235 K.
- Conclusions:
- No melting temperature was determined for the test substance. A glass transition temperature of -38 °C was determined using differential scanning calorimetry in accordance with EC A.1, OECD 102 and EPA OPPTS 830.7200, and in compliance with GLP.
Reference
DSC experiment I: during cooling, a glass transition was observed between -40°C and -70°C. During heating a glass transition between -75°C and -25°C was observed (inflection point of the glass transition: -37.91°C). An endothermic peak was observed starting at 275°C, possibly due to evaporation of the test substance. After the experiment, a yellow residue remained in the sample container.
DSC experiment II: A higher end temperature was applied to determine the endothermic effect starting at 275°C. During cooling, a glass transition was observed between -40°C and -70°C. The inflection point of the glass transition during heating was -37.76°C. An endothermic peak was observed between 275°C and 400°C (extrapolated onset temperature: 362.08°C). The effect was possibly due to evaporation of the test substance. After the experiment, the test substance had evaporated from the sample container.
DSC experiment III: To investigate the endothermic peak a closed sample container was applied. The extrapolated onset temperature of the peak was 362.06°C. Since the endothermic peak did not shift to higher temperatures, reaction and/or decomposition of the test substance was the reason for the endothermic effect. After the experiment it was observed that the test substance had evaporated from the sample container.
TGA/DSC curves: see attached document.
Description of key information
No melting temperature was determined for the
test substance. A glass transition temperature
of -38 °C was determined for the test substance
using differential scanning calorimetry in
accordance with EC A.1, OECD 102 and
EPA OPPTS 830.7200 and in compliance with GLP.
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- -38 °C
Additional information
No melting point has been identified for this substance.
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