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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:
2021-01-12
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)
Version / remarks:
2008
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
differential scanning calorimetry
Key result
Melting / freezing pt.:
193.3 °C
Atm. press.:
997 hPa
Decomposition:
no
Sublimation:
no

In the temperature range of 190 – 210 °C an endothermic effect (melting) was observed.














































Measurement No.



Sample weight / mg



Onset of Effect / °C



Range of effect / °C



Weight loss / mg



Atmospheric pressure / hPa



PN20717



10.63



193.06



190 – 210 (endo)



9.08



997.3



 



 



252.80



240 – 330 (endo)



 



 



PN20718



11.14



193.61



190 – 210 (endo)



9.49



996.5



 



 



266.66



240 – 320 (endo)



 



 



During the heating phase a distinct endothermic effect was observed in the temperature range of 190 – 210 °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 193.34 °C, this temperature can be used as melting point. The test item has a melting point of 193.3 °C.

Conclusions:
The melting point of the test item was determined to be 193.3 °C.
Executive summary:

An experimental study was conducted to determine the melting point of the test item according to OECD Guideline 102 and Regulation (EC) No 440/2008, Method A.1 using differential scanning calorimetry. During the heating phase a distinct endothermic effect was observed in the temperature range of 190 – 210 °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 193.34 °C, this temperature can be used as melting point. The test item has a melting point of 193.3 °C.

Description of key information

The melting point of the test item was determined to be 193.3 °C (reference 4.2-1).

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
193.3 °C

Additional information

An experimental study was conducted to determine the melting point of the test item according to OECD Guideline 102 and Regulation (EC) No 440/2008, Method A.1 using differential scanning calorimetry. During the heating phase a distinct endothermic effect was observed in the temperature range of 190 – 210 °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 193.34 °C, this temperature can be used as melting point. The test item has a melting point of 193.3 °C.