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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:
19.10.-20.10.2016
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Deviations:
no
GLP compliance:
yes (incl. certificate)
Type of method:
differential scanning calorimetry
Key result
Atm. press.:
98 kPa
Decomposition:
yes
Decomp. temp.:
>= 230 °C
Conclusions:
The water evaporation connected with the beginnig thermal decomposition was observed between start temperature and 190 °C. The rapid thermal decomposition of the test substance started at the temperature 230 °C. Any peaks correspond to the melting or boiling of the test substance was not observed to the temperature at whitch the thermal decomposition started.
Executive summary:

The melting of the testsubstance, Acid Yellow 25 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 beginnig thermal decomposition was observed between start temperature and 190°C. The rapid thermal decomposition of the test substance started at the temperature 230°C. Any peaks correspond to the melting of the test substance was not observed to the temperature at which the thermal decomposition started.

 

Melting temperature of the test substance, Acid Yellow 25, could not be determined because of thermal decomposition of the test substance.

Description of key information

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

Only one study is available.

GLP study.

Klimish score 1

Key value for chemical safety assessment

Additional information

Melting temperature of the test substance, Acid Yellow 25, could not be determined because of thermal decomposition of the test substance.