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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:
from 2020-02-03 to 2020-02-24
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Version / remarks:
1995
Deviations:
no
Qualifier:
according to
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Version / remarks:
440/2008/EC, 30 May 2008
Deviations:
no
GLP compliance:
yes (incl. certificate)
Type of method:
differential scanning calorimetry
Key result
Melting / freezing pt.:
>= -77 - <= -75 °C
Atm. press.:
>= 988.3 - <= 1 001.3 hPa
Decomposition:
no
Sublimation:
no

During the cooling phase down to -90 °C no thermal effects could be observed. In the subsequent heatingphase a distinct endothermic effect was observed in the temperature range of -80 to -70 °C, which can be assigned to the melting of the test item. As the onset temperatures in both tests deviate by more than 0.5 K from their mean value of 76.34 °C, the test item has a melting range of -75 to -77 °C.

 

No.

Sample weight / mg

Onset of Effect / °C

Range of effect / °C

Weight loss / mg

Atmospheric pressure / hPa

PN19172

9.56

-75.27
+229.64

-80 to -70 (endo)
180 – 250 (endo)

9.56

1001.3

PN19177

10.89

-77.41
+229.23

-80 to -70 (endo)
180 – 250 (endo)

10.89

988.3

Conclusions:
The test item has a melting range of -75 to -77 °C.
Executive summary:

The melting point of the test item was determined according to OECD test guideline 102 and Regulation EC No. 440/2008, Method A.1. Under ambient conditions, the test item is liquid. The tests were started at ambient temperature. The temperature was first decreased to -90 °C at a constant cooling rate of 0.25 K/min. After 30 min at -90 °C the temperature was increased up to 500 °C at a constant heating rate of 10 K/min. During the cooling phase down to -90 °C no thermal effects could be observed. In the subsequent heating phase a distinct endothermic effect was observed in the temperature range of -80 to -70 °C, which can be assigned to the melting of the test item. The melting range of the test item was determined to be -75 to -77 °C.

Description of key information

The test item has a melting range of -75 to -77 °C.

Key value for chemical safety assessment

Additional information

The melting point of the test item was determined according to OECD test guideline 102 and Regulation EC No. 440/2008, Method A.1. Under ambient conditions, the test item is liquid. The tests were started at ambient temperature. The temperature was first decreased to -90 °C at a constant cooling rate of 0.25 K/min. After 30 min at -90 °C the temperature was increased up to 500 °C at a constant heating rate of 10 K/min. During the cooling phase down to -90 °C no thermal effects could be observed. In the subsequent heating phase a distinct endothermic effect was observed in the temperature range of -80 to -70 °C, which can be assigned to the melting of the test item. The melting range of the test item was determined to be -75 to -77 °C.