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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:
6 August 2009 to 19 August 2009
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: see 'Remark'
Remarks:
Study conducted in compliance with agreed protocols, with no or minor deviations from standard test guidelines and/or methodological deficiencies, which do not affect the quality of the relevant results. The study report was conclusive and done to a valid guideline.
Qualifier:
according to guideline
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Deviations:
no
GLP compliance:
no
Type of method:
thermal analysis
Melting / freezing pt.:
> 723 K
Remarks on result:
other: ± 0.5

As there were no significant thermal events, it was determined that no changes in the physical state of the test material occurred over the range of 25 to 450 °C.

During both determinations, an endotherm was displayed by both thermograms. These are tabulated in table 3 (see below).

 

Table 3: Thermographic Data from Determinations 1 and 2

Determination

Thermal Event

Interpretation

Temperature

°C

K

1 (Air, Static)

-

No sign of any significant thermal event.

-

-

2 (Nitrogen)

 No sign of any significant thermal event.

 

Conclusions:
The melting temperature of the test material was determined to be > 723 ± 0.5 K. No sign of any significant thermal event was observed.
Executive summary:

The melting point of the test material was investigated in a study which was conducted in accordance with the standardised guideline EU Method A.1.

Under the conditions of the study the melting temperature of the test material was determined to be in excess of 723 K.

Description of key information

The melting point of the substance is > 723K (>450°C), EU Method A.1, Atwall & Tremain (2009)

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
450 K

Additional information

The melting point of the test material was investigated in a study which was conducted in accordance with the standardised guideline EU Method A.1.

Under the conditions of the study the melting temperature of the test material was determined to be in excess of 723 K.

In actual fact, the melting point of the substance is expected to be much higher than 1000 °C and the temperature of 450°C stated is the maximum temperature possible in the DSC melting point apparatus.