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Physical & Chemical properties

Melting point / freezing point

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Reference
Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2015-07-27
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline 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
Qualifier:
equivalent or similar to guideline
Guideline:
EPA OPPTS 830.7200 (Melting Point / Melting Range)
Version / remarks:
2009
Deviations:
no
GLP compliance:
no
Type of method:
differential scanning calorimetry
Key result
Melting / freezing pt.:
< -100 °C
Atm. press.:
1 005.2 hPa
Decomposition:
no
Sublimation:
no

During the cooling phase, no thermal effects were observed in the temperature range of -100 to 25 °C. It can be assumed that the test item has no melting or freezing point in this temperature range. Therefore the test item has no melting point down to a temperature of -100 °C.

Conclusions:
The test item has no melting point down to a temperature of -100 °C at atmospheric pressure (1005 hPa) as determined by differential scanning calorimetry according to Regulation EC No. 440/2008 Method A.1. and OECD Test Guideline 102 (1995).
Executive summary:

Melting point of the test item was determined by differential scanning calorimetry according to Regulation EC No. 440/2008 Method A.1. and OECD Test Guideline 102 (1995). The test item was weighed out into an aluminium crucible under an inert atmosphere. Two tests with about 9 – 11 mg of the test item were performed. After check-weighing, the perforated lid was attached using a crucible press. As reference crucible, an empty aluminium crucible was used.

At ambient conditions, the test item is a liquid. Therefore the crucibles were cooled down from ambient temperature to -100 °C with a constant cooling rate of 0.25 K/min under an inert atmosphere. During the cooling phase, no thermal effects were observed in the temperature range of -100 to 25 °C. Thus, it can be assumed that the test item has no melting or freezing point in this temperature range. Therefore the test item has no melting point down to a temperature of -100 °C.

Description of key information

The test item has no melting point down to a temperature of -100 °C at atmospheric pressure (1005 hPa) as determined by differential scanning calorimetry according to Regulation EC No. 440/2008 Method A.1. and OECD Test Guideline 102 (1995).

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
-100 °C

Additional information

Melting point of the test item was determined by differential scanning calorimetry according to Regulation EC No. 440/2008 Method A.1. and OECD Test Guideline 102 (1995).The test item was weighed out into an aluminium crucible under an inert atmosphere. Two tests with about 9 – 11 mg of the test item were performed. After check-weighing, the perforated lid was attached using a crucible press. As reference crucible, an empty aluminium crucible was used.

At ambient conditions, the test item is a liquid. Therefore, the crucibles were cooled down from ambient temperature to -100 °C with a constant cooling rate of 0.25 K/min under an inert atmosphere. During the cooling phase, no thermal effects were observed in the temperature range of -100 to 25 °C. Thus, it can be assumed that the test item has no melting or freezing point in this temperature range. Therefore the test item has no melting point down to a temperature of -100 °C.