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Diss Factsheets

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:
18 Jul - 13 Aug 2012
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
GLP compliance:
no
Type of method:
differential scanning calorimetry
Melting / freezing pt.:
> 142 °C
Decomposition:
yes
Decomp. temp.:
ca. 142 °C

Details:

The test item shows no melting of the main component up to 142 °C (in the 2. heating run) according to the definition in the OECD Guideline 102 (mean value from repeat determinations; 2nd heating run. From 142 °C the test item shows an endothermic effect. This effect is most probably a thermal decomposition and evaporation of the decomposition components. The effect is probably not the melting of the test item (main component) which was verified by subsequent tests with the Kofler-heating bank.

144 °C (from first measurement)

143 °C (from second measurement)

139 °C (from third measurement)

Additional the sample shows a melting of crystalline sub components between -1 and 74 °C (1st heating run):

-1 °C- 76 °C (from first measurement)

-1 °C- 72 °C (from second measurement)

0 °C- 72 °C (from third measurement)

The cooling runs show no crystallisation of the main component. At -42 °C the test item shows possibly a glass transition temperature.

Description of key information

> 142 °C 

Key value for chemical safety assessment

Additional information

The melting point of the substance was determined by Differential Scanning Calorimetry according to OECD Guideline 102.

No melting of the main component up to 142 °C. The substance most probably decomposes at ca. 142 °C.

Additional the sample shows a melting of crystalline sub components between -1 and 74 °C. The cooling runs show no crystallization of the main component. At -42 °C the substance shows possibly a glass transition temperature.