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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
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Version / remarks:
Published in O.J. L 142 (2008)
Deviations:
no
GLP compliance:
yes (incl. certificate)
Type of method:
differential scanning calorimetry
Key result
Melting / freezing pt.:
> 367 °C
Atm. press.:
99.3 kPa
Decomposition:
yes
Decomp. temp.:
> 367 °C
Conclusions:
The water evaporation connected with the beginnig thermal decomposition was observed between 35°C and 250°C. The rapid thermal decomposition of the test substance started at the temperature 367°C. No peaks corresponding to the melting or boiling of the test substance was observed to the temperature at whitch the thermal decomposition started.Melting temperature and boiling temperature of the test substance, Direct Yellow 28, could not be determined because of thermal decomposition of the test substance.
Executive summary:

The melting and boiling temperature of the test substance, Direct Yellow 28, was investigated. The Differential Scanning Calorimetry method was used. The procedures used in the study were in accordance with:

- Method A.1. Melting/Freezing temperature, Council Regulation (EC) No.440/2008, Published in O.J. L 142, 2008

- OECD Test Guideline No.102, Melting Point/Melting Range, Adopted July 27, 1995

The water evaporation connected with the beginning thermal decomposition was observed between 35°C and 250°C. The rapid thermal decomposition of the test substance started at the temperature 367°C. No peaks corresponding to the melting or boiling of the test substance was observed to the temperature at which the thermal decomposition started.

Melting temperature and boiling temperature of the test substance, Direct Yellow 28, could not be determined because of thermal decomposition of the test substance.

Description of key information

Melting temperature of the test substance, Direct Yellow 28, could not be determined because of thermal decomposition of the test substance.

Key value for chemical safety assessment

Additional information