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Diss Factsheets

Physical & Chemical properties

Melting point / freezing point

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Link to relevant study record(s)

Reference
Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
02-03-2015 to 27-05-2015
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:
EU Method A.1 (Melting / Freezing Temperature)
Deviations:
no
Qualifier:
according to guideline
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Deviations:
no
Qualifier:
according to guideline
Guideline:
EPA OPPTS 830.7200 (Melting Point / Melting Range)
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Remarks:
inspected March 2013 ; signature: May 2013
Type of method:
differential scanning calorimetry
Key result
Melting / freezing pt.:
< -80 °C
Atm. press.:
1 029 hPa
Decomposition:
no
Sublimation:
no

Main study

- Experiment 1: During cooling, no effects were observed which were due to crystallization of the test substance (results are archived in the raw data). During heating, an endothermic peak between 200°C and 350°C was observed. The extrapolated onset temperature of the peak was 252.33°C. The effect was most likely obtained due to boiling of the test substance. After the experiment it was observed that the test substance evaporated from the sample container.

 - To further investigate the melting temperature of the test item, two samples of the test item were stored for 22 hours at -22.0 ± 0.3°C and -81.6 ± 1.8°C respectively. It was observed after storage that the test item was a viscous liquid (-20°C freezer) and a very viscous liquid (-80°C freezer). According to this it was concluded that the melting temperature of the test item is < -80°C (< 193K).

Conclusions:
The freezing temperature of the test item was determined to be < 193 K or < -80 °C.
Executive summary:

The melting/freezing temperature was determined using EU Method A.1 and Differential Scanning Calorimetry method under GLP. Since no effects were observed due to crystallization of the test item in DSC experiment at temperatures of down to -90 °C. Therefore, in a storage experiment in a freezer two samples of the test item were stored for 22 hours at -22.0 ± 0.3°C and -81.6 ± 1.8°C respectively. No crystallization was observed at these temperatures. Therefore, the mean freezing temperature of the test item has been determined to be < 193.0 K or < -80.0 °C at 1029 ±1 hPa.

Description of key information

Mp: < 193 K (or < -80.0 °C) at 1029 ±1 hPa, EU Method A.1 : Thermal Analysis : DSC Method, 2015

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
-80 °C

Additional information

Key study : EU Method A.1, 2015 : The melting/freezing temperature was determined using EU Method A.1 and Differential Scanning Calorimetry method under GLP. Since no effects were observed due to crystallization of the test item in DSC experiment at temperatures of down to -90 °C. Therefore, in a storage experiment in a freezer two samples of the test item were stored for 22 hours at -22.0 ± 0.3°C and -81.6 ± 1.8°C respectively. No crystallization was observed at these temperatures. Therefore, the mean freezing temperature of the test item has been determined to be < 193.0 K or < -80.0 °C at 1029 ±1 hPa.