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Diss Factsheets

Physical & Chemical properties

Melting point / freezing point

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Administrative data

Link to relevant study record(s)

Reference
Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2016-03-22 - 2016-03-23
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Reason / purpose for cross-reference:
reference to same study
Qualifier:
according to guideline
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Version / remarks:
1995
Deviations:
no
Qualifier:
according to guideline
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Deviations:
no
GLP compliance:
no
Type of method:
differential scanning calorimetry
Key result
Melting / freezing pt.:
-44.2 °C
Atm. press.:
1 003 hPa
Decomposition:
no

During the cooling phase, an exothermal effect was observed at a temperature of approx. -60 °C, which can be associated with the freezing of the test item.

During the heating phase a distinct endothermic effect was observed in the temperature range of -50 to -30 °C, which can be assigned to the melting of the test item. As the onset temperatures in both tests deviate less than 0.5K from their mean value of -44.24 °C, the test item has a melting point of -44.2 °C.

The details of the measurement are given below:

Sample weight (mg) Onset of effect (°C) Range of effect (°C) Atmospheric pressure (hPa)
12.26

-44.20

-50 to -30 (endo)
1002.2
14.89 -44.27 -50 to -30 (endo)
1003.0
Conclusions:
The melting point of the test item was found to be -44.2°C.
Executive summary:

The melting point of the test substance was determined according to OECD 102, by differential scanning calorimetry. The melting point as mean of 2 replicates was found to be -44.2°C.

Description of key information

For this endpoint, the melting point of the test item was determined experimentally according to OECD 102, by differential scanning calorimetry. The test item was found to have a melting point of -44.2 °C. This is in close correspondance with the melting point reported in the CRC Handbook (1993), which is -43.1 °C.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
-44.2 °C

Additional information