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Physical & Chemical properties

Melting point / freezing point

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Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
supporting study
Study period:
7 July - 9 August, 2016
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
Type of method:
differential scanning calorimetry
Melting / freezing pt.:
>= 39 - <= 96 °C
Atm. press.:
101.3 kPa
Decomposition:
no
Sublimation:
no

The heating run showed melting of a minor crystalline component starting at around 14 °C. The main crystalline components melted between 39 - 96 °C.

Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
12 February - 25 March, 2019
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
Qualifier:
according to guideline
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
capillary method
Decomposition:
yes
Decomp. temp.:
195 °C
Sublimation:
no

Using a linear heating rate of 0.5°C/min from 190°C, the test item turned a brown colour at about 195°C and then turned black at about 215°C without completely melting. Hence, 195°C is considered as the decomposition temperature.

Conclusions:
The test item decomposed prior to melting, starting at 195°C

Description of key information

In the key study the test item decomposed prior to melting, starting at 195°C

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
195 °C

Additional information