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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:
April 24, 2018 - April 25, 2018
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Deviations:
no
Qualifier:
according to
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Deviations:
no
GLP compliance:
no
Type of method:
differential scanning calorimetry
Key result
Melting / freezing pt.:
> 119 - < 122 °C
Decomposition:
yes
Decomp. temp.:
> 122 °C

Melting point / melting range: DSC measurement

Three DSC measurements with a heating rate of 10 K/min showed an endothermal effect (melting) in the temperature range of 100 – 135 °C. The onset temperature (seeTable1) was derived from the intersection of the tangent line with the highest slope of the endothermal peak with the baseline. After melting the test item decomposed. The results of the DSC measurements are summarized inTable 1.

Table1: Melting point (DSC measurements)

Ident No.

Test item /

mg

Starting temperature /

°C

Final test temperature /

°C

Temperature range (endo-thermal) /

°C

Onset (melting) / °C

Crucible

Observations after the measurement

36964

13.39

25

500

100 –135

119.93

Aluminium with a hole

Test item was a black solid: mass loss 91%

36966

11.53

25

150

100 –135

121.20

Aluminium with a hole

Test item was a solidified red melt: mass loss 2 %

36972

13.73

25

150

100 –130

119.37

Aluminium with a hole

Test item was a solidified red melt: mass loss 2 %

Under consideration of the result from the DSC measurement and the visual inspection of the test item after the measurement it was concluded that the test item melted within a temperature range of 119 – 122 °C.

Executive summary:

The test item had a melting range of 119 – 122°C.

Description of key information

The test item had a melting range of 119 – 122°C.

Key value for chemical safety assessment

Additional information