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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:
16 November 2018
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
Qualifier:
according to guideline
Guideline:
EPA OPPTS 830.7200 (Melting Point / Melting Range)
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
differential scanning calorimetry
Key result
Melting / freezing pt.:
>= 45.4 - <= 53.2 °C
Atm. press.:
1 013.25 hPa
Decomposition:
no
Sublimation:
no

Values of the DSC run in the first experiment

Sample weight [mg]

Total loss of mass of the sample (%)

Onset of effect [°C]

Endset of effect [°C]

Energy [J/g]

4.37

97.9

45.39

52.17

-276.67 (endothermic)

 

Values of the DSC run in the second experiment

Sample weight [mg]

Total loss of mass of the sample (%)

Onset of effect [°C]

Endset of effect [°C]

Energy [J/g]

6.09

99.8

45.35

54.30

-288.73 (endothermic)

 

Summary of the DSC Test of Test Item

 

Experiment 1

Experiment 2

Mean

Onset of effect [°C]

45.39

45.35

45.37

Endset of effect [°C]

52.17

54.30

53.24

 

Conclusions:
The melting point of the test item was determined to be in the range of 45.4 – 53.2 °C (318.5 – 326.4 K).
Executive summary:

A study was conducted according to OECD test guideline 102, Regulation (EC) No 440/2008 method A.1 and EPA OCSPP test guideline 830.7200 to determine the melting point of the test item using differential scanning calorimetry. The test item was weighed out into an aluminium crucible under an inert atmosphere (nitrogen). A small amount of the test item was weighed into a one-way 40 μL aluminium crucible and sealed with pierced aluminium lid. As reference crucible, an empty aluminium crucible was used. The DSC was heated from room temperature to 500 °C with 10 °C/min heating rate. This experiment was performed in duplicate. The melting point of the test item was determined to be in the range of 45.4 – 53.2 °C (318.5 – 326.4 K).

Description of key information

The melting point of the test item was determined to be in the range of 45.4 – 53.2 °C (318.5 – 326.4 K) (reference 4.2-1).

Key value for chemical safety assessment

Additional information

A study was conducted according to OECD test guideline 102, Regulation (EC) No 440/2008 method A.1 and EPA OCSPP test guideline 830.7200 to determine the melting point of the test item using differential scanning calorimetry. The test item was weighed out into an aluminium crucible under an inert atmosphere (nitrogen). A small amount of the test item was weighed into a one-way 40 μL aluminium crucible and sealed with pierced aluminium lid. As reference crucible, an empty aluminium crucible was used. The DSC was heated from room temperature to 500 °C with 10 °C/min heating rate. This experiment was performed in duplicate. The melting point of the test item was determined to be in the range of 45.4 – 53.2 °C (318.5 – 326.4 K).