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EC number: 807-612-4 | CAS number: 1393645-32-3
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:
- 2015
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: Guideline study performed under GLP. All relevant validity criteria were met.
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EPA OPPTS 830.7200 (Melting Point / Melting Range)
- Deviations:
- no
- GLP compliance:
- yes
- Type of method:
- differential scanning calorimetry
- Melting / freezing pt.:
- <= -80 °C
- Atm. press.:
- ca. 1 019 hPa
- Decomposition:
- no
- Sublimation:
- no
- Remarks on result:
- other: mean melting point (n = 2)
- Conclusions:
- The melting temperature of the test item has been determined to be < -80 °C (or < 193 K). At this temperature the substance is considered to be liquid.
- Executive summary:
The melting temperature was determined using OECD TG 102 and EU Method A.1 with the Differential Scanning Calorimetry method under GLP. The guideline defines the melting temperature as: the temperature at which the phase transition from solid to liquid state occurs at atmospheric pressure and this temperature ideally corresponds to the freezing temperature.During DSC cooling no effects were observed which were due to crystallization of the test item. To further investigate the melting temperature of the test item, two samples of the test substance were stored for 22 hours at -21.9 ± 0.3°C and -82.0 ± 1.9°C respectively. After storage it was observed that the test item was a viscous liquid (-20°C freezer) and a very viscous liquid (-80°C freezer). Accordingly, it was concluded that the melting temperature of the test substance is < -80°C (< 193K). At this temperature the substance is considered to be liquid.
Reference
Main study
- Experiment 1: During cooling no effects were observed which were due to crystallization of the test item.During heating, an endothermic peak between 200°C and 325°C was observed. The extrapolated onset temperature of the peak was 283.72°C.
- Experiment 2: Was conducted to examine the boiling temperature using a hermetically closed sample container. The endothermic peak shifted to higher temperatures. It demonstrated that evaporation of the test substance was the reason for the endothermic effect.
- Experiment 3: Was conducted to further examine the boiling temperature of the test item in duplicate. An endothermic peak was observed. The extrapolated onset of the evaporation peak was 284.05°C.
To further investigate the melting temperature of the test item, two samples of the test substance were stored for 22 hours at -21.9 ± 0.3°C and -82.0 ± 1.9°C respectively. After storage it was observed that the test item was a viscous liquid (-20°C freezer) and a very viscous liquid (-80°C freezer). Accordingly, it was concluded that the melting temperature of the test substance is < -80°C (< 193K).
Description of key information
Mp: < -80 °C (< 193 K) at 1 atmosphere, OECD TG 102 - DSC Method, 2014
Key value for chemical safety assessment
Additional information
Key Study : OECD TG 102, 2015 : The melting temperature was determined using OECD TG 102 and EU Method A.1 with the Differential Scanning Calorimetry method under GLP. The guideline defines the melting temperature as: the temperature at which the phase transition from solid to liquid state occurs at atmospheric pressure and this temperature ideally corresponds to the freezing temperature.During DSC cooling no effects were observed which were due to crystallization of the test item. To further investigate the melting temperature of the test item, two samples of the test substance were stored for 22 hours at -21.9 ± 0.3°C and -82.0 ± 1.9°C respectively. After storage it was observed that the test item was a viscous liquid (-20°C freezer) and a very viscous liquid (-80°C freezer). Accordingly, it was concluded that the melting temperature of the test substance is < -80°C (< 193K). At this temperature the substance is considered to be liquid.
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