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Physical & Chemical properties

Melting point / freezing point

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melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
according to guideline
EU Method A.1 (Melting / Freezing Temperature)
according to guideline
OECD Guideline 102 (Melting point / Melting Range)
GLP compliance:
yes (incl. QA statement)
Type of method:
capillary method
Key result
Melting / freezing pt.:
> 400 °C
For the determination of the melting point or melting range, the capillary method was used. A small amount of the test item was heated in the
electronic controlled sample block and the temperature around the sample was displayed. The sample was observed visually while raising the
temperature. The initial and final melting temperatures were determined. No melting point was observed up to 400°C.
Executive summary:
The objective of the study was to determine the melting point of the test item. The study was performed under GLP conditions and in accordance with Commission Regulation (EC) No 440/2008 of 30 May 2008 laying down test methods pursuant to Regulation (EC) No 1907/2006 of the European Parliament and of the Council on the Registration, Evaluation, Authorisation and Restriction of Chemicals (REACH), Method A.1, Official Journal of the European Union L 142 of 31 May 2008 and in accordance with the Organisation for Economic Co-operation and Development (OECD), Guidelines for Testing of Chemicals, Guideline No. 102, “Melting Point / Melting Range”; adopted July 27, 1995. A small aliquot of the finely ground substance was loaded into a capillary tube. The capillary tube was placed in the metal heating block of a Büchi B-540 melting point apparatus. The melting point experiment was initiated at ambient temperature (20°C). The temperature was then increased at a 2°C per minute ramp rate with no change seen up to 390°C. The material started to change to a light brown colour at 390°C. At 400°C the test material was seen to be dark brown (oxidised), but no melting had occurred.

Description of key information

No melting point was observed up to 400 °C. This data is taken from a study performed using the capillary method in accordance with OECD Test Guideline 102 and EU Method A1.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
400 °C

Additional information