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Melting point / freezing point

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melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
Not available
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: The study was conducted according to a conventional method, not GLP.
Principles of method if other than guideline:
The thermal characteristics were determined by conventional DSC (TA Instruments, Q10 with quench-cooling system) at a heating rate B = 10 K.min-1.

In the high temperature range various heat flow contributions often overlap. Hence, in this range temperature-modulated DSC was also conducted at B = 2 K.min-1 using an amplitude of 1°C and a period of 60s. Mass loss profiles were recorded by TGA (TA Instruments, Q50) at a heating rate of B = 2 or 10 K.min-1.

All the experiments were performed under nitrogen atmosphere.
GLP compliance:
Type of method:
thermal analysis
Key result
Melting / freezing pt.:
-48 °C
Atm. press.:
1 atm
Remarks on result:
other: Melting point (Tm) is equivalent to glass transition point (Tg)


Under the conditions of the study, the melting (glass transition) point of PETIA was -48°C.
Executive summary:

A study was conducted to determine the melting (glass transition) point of PETIA using conventional DSC at a heating rate of 10 K/min.

Under the conditions of the study, the melting (glass transition) point of PETIA was -48°C.

Description of key information

The melting (glass transition) point is -48°C (Roose, 2007).

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
-48 °C

Additional information