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Melting point / freezing point

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Reference
Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Deviations:
no
Qualifier:
according to guideline
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
differential scanning calorimetry
Melting / freezing pt.:
-22.9 °C
Atm. press.:
ca. 101.3 kPa
Decomposition:
no
Sublimation:
no
Remarks on result:
other: result relates to glass transition temperature of the substance

In both experiment a glass transition was observed between -37 and -16°C on the heating curve. The extrapolated glass transition temperatures were -22.76 and -22.98°C in the initial and follow up experiments respectively. In both experiments, the sample had lost no mass and the consistency and colour of the sample had not changed.

Conclusions:
No endothermic peak corresponding to melting of the test substance was recorded in the tested temperature range from -50°C to 25°C. On both heating and cooling curves, a glass transition temperature of -22.9°C was determined.

Description of key information

No endothermic peak corresponding to melting of the test substance was recorded in the tested temperature range from -50°C to 25°C. On both heating and cooling curves, a glass transition temperature of -22.9°C was determined which is selected as the key value for chemical safety assessment.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
-22.9 °C

Additional information

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