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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:
May to October 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
Other quality assurance:
other: Commission Regulation (EC) No 440/2008 (as amended) of 30 May 2008
Remarks:
European Commission Technical Guidance Document EUR 20268 'Determination of Particle Size Distribution, Fibre Length and Diameter Distribution of Chemical Substances' (2002)
Type of method:
differential scanning calorimetry
Key result
Decomposition:
yes
Decomp. temp.:
170 °C

As a result of the initial low rate of enthalpy change during decomposition, the onset temperature could only be approximated.



Exothermic losses of volatile materials were obtained using air and nitrogen atmospheres. This indicated that the decomposition was probably thermal and not oxidative.


The test item has been determined to decompose from approximately 170 °C (443 K).

Conclusions:
The test item has been determined to decompose from approximately 170 °C (443 K).
Executive summary:

As a result of the initial low rate of enthalpy change during decomposition, the onset temperature could only be approximated.
Exothermic losses of volatile materials were obtained using air and nitrogen atmospheres. This indicated that the decomposition was probably thermal and not oxidative.


The test item has been determined to decompose from approximately 170 °C (443 K).

Description of key information

The test item has been determined to decompose from approximately 170 °C (443 K).

Key value for chemical safety assessment

Additional information