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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:
2016-03-24 to 2016-03-24
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Deviations:
no
Qualifier:
according to guideline
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Deviations:
no
GLP compliance:
no
Type of method:
differential scanning calorimetry
Key result
Melting / freezing pt.:
63 °C
Atm. press.:
1 013.25 hPa
Decomposition:
no
Sublimation:
no

Melting point / melting range: DSC measurement

Two DSC measurements with a heating rate of 10 K/min showed an endothermal effect (melting) in the temperature range of 50 - 75 °C. The onset temperature was derived from the intersection of the tangent line with the highest slope of the endothermal peak with the baseline.

 

 

Ident No.

Test item / mg

Starting temperature /

°C

Final test temperature /

°C

Temperature range (melting) / °C

Onset / °C

Crucible

Observations

35478

8.63

25

500

5 0 - 7 0

63.08

Aluminium with a hole

Measurement continued after melting

35479

10.94

25

120

5 5 - 7 5

62.93

Aluminium with a hole

Test item was a solidified melt

after the measurement

 

The test item had a mean melting point of 63.0 °C.

Conclusions:
The melting point of the test item was determined to be 63.0 °C.
Executive summary:

A study was conducted according to OECD TG 102 and Regulation (EC) No 440/2008 method A.1 to determine the melting point of the test item using differential scanning calorimetry. The test item was weighed into an aluminium crucible under an inert atmosphere (nitrogen). Three tests with about 8 - 11 mg of the test item were performed. As reference crucible, an empty aluminium crucible was used. One DSC measurement with a heating rate of 10 K/min up to the final temperature of 500 °C showed an endothermal effect (melting) in the temperature range of 50 - 70 °C. One additional DSC measurement with a heating rate of 10 K/min up to the final temperature of 120 °C showed an endothermal effect (melting) in the temperature range of 55 -75 °C. Based on the results of the DSC-measurements it was concluded that the test item has a melting point of 63.0 °C.

Description of key information

The melting point of the test item was determined to be 63.0 °C.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
63 °C

Additional information

A study was conducted according to OECD TG 102 and Regulation (EC) No 440/2008 method A.1 to determine the melting point of the test item using differential scanning calorimetry (reference 4.2 -1). The test item was weighed into an aluminium crucible under an inert atmosphere (nitrogen). Three tests with about 8 - 11 mg of the test item were performed. As reference crucible, an empty aluminium crucible was used. One DSC measurement with a heating rate of 10 K/min up to the final temperature of 500 °C showed an endothermal effect (melting) in the temperature range of 50 - 70 °C. One additional DSC measurement with a heating rate of 10 K/min up to the final temperature of 120 °C showed an endothermal effect (melting) in the temperature range of 55 -75 °C. Based on the results of the DSC-measurements it was concluded that the test item has a melting point of 63.0 °C.

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