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Diss Factsheets

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
Study period:
16 December 2003 and 11 March 2004
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: GLP study conducted in accordance with an internationally recognised method
according to guideline
OECD Guideline 102 (Melting point / Melting Range)
GLP compliance:
yes (incl. QA statement)
Type of method:
thermal analysis
Key result
Melting / freezing pt.:
> 360 °C

Loss of volatile impurity or possible sublimation of the organic component of MPP at 320.8 °C (596K) in duplicate determination.

A visual assessment was performed up to 360°C, using the metal block method. No melting was observed, confirming that the endotherm present in the thermograms was due to the loss of a volatile impurity or possibly sublimation of the organic component of MPP.

Overall result: no melting observed up to 360°C (633 K)

The melting point of the test material has been determined to be greater than 360°C (633 K).

Description of key information

The melting point of the test material has been determined to be greater than 360°C (633 K).

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
360 °C

Additional information

MPP is a white powder, with a high melting point (>360°C) and a very low vapour pressure