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Physical & Chemical properties

Melting point / freezing point

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Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2020-05-11
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:
2008
Deviations:
no
Qualifier:
according to guideline
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Version / remarks:
1995
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
differential scanning calorimetry
Key result
Melting / freezing pt.:
92.8 °C
Atm. press.:
991 hPa
Decomposition:
no
Sublimation:
no

In the temperature range of 90 to 100 °C a first endothermic effect could be observed. A second endothermic effect was detected in the temperature range of 320 to 390 °C. No further thermic effects could be observed up to the maximum temperature of 500 °C.


Results of the DSC-measurements






























No.



Sample weight / mg



Onset of Effect / °C



Range of effect / °C



Weight loss / mg



Atmospheric pressure / hPa



PN19667



10.05



92.70
354.82



90 – 100 (endo)
320 – 390 (endo)



10.05



991.9



PN19668



10.23



92.90
350.52



90 – 100 (endo)
320 – 390 (endo)



10.23



991.9



 


During the heating phase a distinct endothermic effect was observed in the temperature range of 90 – 100 °C, which can be assigned to the melting of the test item.


As the onset temperatures in both tests do not deviate by more than 0.5 K from their mean value of 92.80 °C, this temperature can be used as melting point. The test item has a melting point of 92.8 °C.

Conclusions:
The melting point was determined to be 92.8 °C.
Executive summary:

The 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). In the DSC measurement the first endothermic effect could be observed in the temperature range of 90 – 100 °C, which was followed by second endothermic effect in the temperature range of 320 – 390 °C. The first endothermic effect is assigned to the melting point. As the onset temperatures in both tests do not deviate by more than 0.5 K from their mean value of 92.80 °C, this temperature can be used as melting point. The test item has a melting point of 92.8 °C.

Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
supporting study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
data from handbook or collection of data
Principles of method if other than guideline:
The substance’s property is described in a reliable source. No details on the method used for determination are provided.
GLP compliance:
not specified
Type of method:
other: not specified
Key result
Melting / freezing pt.:
91.5 °C
Remarks on result:
other: No further information provided
Conclusions:
The melting point was 91.5 °C as described in a reliable data collection.

Description of key information

The melting point was determined to be 92.8 °C (reference 4.2-2).

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
92.8 °C

Additional information

The 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). In the DSC measurement the first endothermic effect could be observed in the temperature range of 90 – 100 °C, which was followed by second endothermic effect in the temperature range of 320 – 390 °C. The first endothermic effect is assigned to the melting point. As the onset temperatures in both tests do not deviate by more than 0.5 K from their mean value of 92.80 °C, this temperature can be used as melting point. The test item has a melting point of 92.8 °C.


As supporting information the melting point was described as 91.5 °C in a reliable data collection (reference 4.2-1).