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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:
15.-17.06.2020
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Version / remarks:
European Commission Regulation (EC) No. 440/2008
Deviations:
no
Qualifier:
according to guideline
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Version / remarks:
1995
Deviations:
no
GLP compliance:
no
Type of method:
differential scanning calorimetry
Key result
Melting / freezing pt.:
305.4 °C
Atm. press.:
ca. 1 013.25 hPa
Decomposition:
no

Two DSC measurements with a heating rate of 10 K/min showed first small endothermal effect in the temperature range of 160 - 180 °C and a second endothermal effect (melting) in the temperature range of 290 - 320 °C.


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Melting point (DSC measurements)




































Ident No.



Test item/ mg



Starting temperature / °C



Final test temperature / °C



Temperature range (melting) /°C



Onset / °C



Crucible



Observations after the measurement



39099



8.68



25



500



160-180


290-320


 



-


305.7


 



Aluminium with a hole



Test item was


a solidified


melt



39100



8.59



25



350



165-180


295-320



-


305.1



Aluminium with a hole



Test item was


a solidified


melt



 


The test item had a melting point of 305.4°C.

Conclusions:
The DSC measurements (160 - 320 °C) showed that the test item had a melting point of 305.4 °C.
Executive summary:

A study was conducted according to OECD test guideline 102, Regulation (EC) No 440/2008 method A.1. The  melting range was determined by differential scanning calorimetry (DSC 160 - 320 °C). The test item and the reference are heated up from the starting temperature to the final temperature at a constant heating rate in a defined atmosphere (nitrogen). Open crucibles are used as containers for the test item and as empty reference crucible. The quantity of heat absorbed or released is measured and recorded. The DSC measurements (160 - 320 °C) showed that the test item had a melting point of 305.4 °C under atmospheric conditions.

Description of key information

The test item had a melting point/range of 305.4 °C.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
305.4 °C

Additional information

A study was conducted according to OECD test guideline 102, Regulation (EC) No 440/2008 method A.1. The melting point was determined by differential scanning calorimetry (DSC 160-320 °C). The test item and the reference are heated up from the starting temperature to the final temperature at a constant heating rate in a defined atmosphere (nitrogen). Open crucibles are used as containers for the test item and as empty reference crucible. The quantity of heat absorbed or released is measured and recorded. The test item had a melting point of 305.4 °C under atmospheric conditions.

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