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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:
Between 15 February and 03 March 2012
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
equivalent or similar to guideline
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Version / remarks:
using a procedure designed to be compatible with Method A1 Melting/Freezing Temperature of Commission Regulation (EC) No 440/2008 of 30 May 2008 and Method 102 of the OECD Guidelines for Testing of Chemicals, 27 July 1995.
Deviations:
no
GLP compliance:
yes
Type of method:
other: Differential scanning calorimetry (DSC)
Decomposition:
yes
Decomp. temp.:
>= 170 °C
Sublimation:
no
Remarks on result:
other: The test item has been determined to decompose with melting from approximately 170 °C (443 K).

Results

Thermograms and thermographic data for Determinations 1 to 3 are shown in Attachment 1.

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

Principle of the Test A phase transformation, e.g. melting or evaporation, or a reaction, e.g. dissociation, usually is associated with a heat effect. In the calorimeter, two identical crucibles, one filled with the test item and the other empty (used as a reference), are heated at a constant rate. During the experiment, the heat effect, i.e. the difference in heat flow between the sample crucible and the reference crucible, is registered. Performance of the Test Calibration The temperature accuracy of the DSC was assessed using an indium reference standard (purity*: 100 %). The melting temperature was determined to be 156.69 ºC and within the defined tolerance (156.6 ± 0.5 ºC). The DSC was therefore considered acceptable for use.


*Value quoted by supplier.

Conclusion

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

Description of key information

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

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
170 °C

Additional information