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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
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
Decomposition:
yes
Decomp. temp.:
> 260 °C

Melting point / melting range // boiling point / boiling range: Differential scanning calorimetry

The DSC measurement in an aluminium crucible with a hole showed a endothermal effect in the temperature range of 80 – 255 °C, directly followed by an exothermal effect (260 – 470 °C). After the measurement up to a final temperature of 500 °C the test item was a black solid. The results of the DSC measurements are summarized in Table1.

Table1: DSC measurements

Ident No.

Test item /

mg

Starting temperature /

°C

Final test temperature /

°C

Temperature range /

°C

Crucible

Observations after the measurement

36963

13.37

25

500

80 – 255
(endothermal)

Aluminium with a hole

Test item was a black solid after the measurement; mass loss: 36 %

36965

14.37

25

250

85 – 250
(endothermal)

Aluminium with a hole

Test item was unchanged after the measurement; mass loss: 8 %

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 had no melting point and no boiling point at atmospheric conditions. Decomposition started at approx. 260 °C.

Executive summary:

The test itemhad no melting point and no boiling point at atmospheric conditions. Decomposition started at approx. 260 °C.

Description of key information

The test itemhad no melting point and no boiling point at atmospheric conditions. Decomposition started at approx. 260 °C.

Key value for chemical safety assessment

Additional information