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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:
2019-03-15 to 2019-03-18
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Deviations:
no
Qualifier:
according to
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Deviations:
no
GLP compliance:
no
Type of method:
differential scanning calorimetry
Key result
Melting / freezing pt.:
< -90 °C
Atm. press.:
1 013.25 hPa

Results of the DSC-measurements

No.

Sample
weight/
mg

Onset of
Effect / °C

Range of effect

rc

Weight
loss /
mg

Atmospheric
pressure / hPa

PN17469

11.95

227.60

170 - 240 (endo)

11.95

992.9

PN17477

11.44

229.27

160 - 240 (endo)

11.43

1006.1

 

During the cooling and the subsequent heating phase, no thermal effects were observed in the temperature range from -90 to ambient temperature. 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 -90 °C.

Conclusions:
The melting point was determined to be below -90 °C at 1013.25 hPa.
Executive summary:

A study was conducted according to OECD test guideline 102, Regulation (EC) No 440/2008 method A.1 and EPA OCSPP test guideline 830.7200 to determine the melting point of the test item using differential scanning calorimetry. The test item was weighed out into an aluminium crucible under an inert atmosphere (nitrogen). Two tests with about 11 -12 mg of the test item were performed. As reference crucible, an empty aluminium crucible was used. The substance is a liquid at ambient conditions. 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. After a waiting period of 30 min at -100 °C, the temperature was increased up to 500 °C at a constant heating rate of 10 K/min. During the cooling and the subsequent heating phase, no thermal effects were observed in the temperature range from -90 to ambient temperature. Therefore it was concluded that the test item has no melting point down to a temperature of -90 °C.

Description of key information

The melting point was determined to be below -90 °C at 1013.25 hPa.

Key value for chemical safety assessment

Additional information

A study was conducted according to OECD test guideline 102, Regulation (EC) No 440/2008 method A.1 and EPA OCSPP test guideline 830.7200 to determine the melting point of the test item using differential scanning calorimetry. The test item was weighed out into an aluminium crucible under an inert atmosphere (nitrogen). Two tests with about 11 -12 mg of the test item were performed. As reference crucible, an empty aluminium crucible was used. The substance is a liquid at ambient conditions. 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. After a waiting period of 30 min at -100 °C, the temperature was increased up to 500 °C at a constant heating rate of 10 K/min. During the cooling and the subsequent heating phase, no thermal effects were observed in the temperature range from -90 to ambient temperature. Therefore it was concluded that the test item has no melting point down to a temperature of -90 °C.