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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:
5.8.-12.10 2015
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
differential scanning calorimetry
Key result
Melting / freezing pt.:
> 240 °C
Atm. press.:
99 kPa
Decomposition:
yes
Decomp. temp.:
> 240 °C
Sublimation:
no
Conclusions:
The water evaporation was observed between start temperature and 240°C, after that the decomposition of the test substance started.Any peaks correspond to the melting or boiling of the test substance were not observed to the temperature at which the thermal decomposition started.Melting temperature temperature of the test substance could not be determined because of thermal degradation of the test substance.
Executive summary:

The melting temperature of the test substance Reactive Orange 5 was investigated.

The Differential Scanning Calorimetry method was used.

Decomposition of the test substance was observed above 240°C, i.e. 513K. Melting of the test substance was not observed below the temperature at which decomposition started.

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

Melting temperature of the test substance Reactive Orange 5 could not be determined because of thermal degradation of the test substance.

Description of key information

Themeltingtemperature of the test substance, Reactive Orange 5 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.

Only one study is available.

GLP study.

Klimish score 1.

Key value for chemical safety assessment

Additional information

Decomposition of the test substance was observed above 240°C, i.e. 513K. Melting of the test substance was not observed below the temperature at which decomposition started.

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