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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
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Deviations:
no
Qualifier:
according to
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Deviations:
no
GLP compliance:
yes
Type of method:
differential scanning calorimetry
Key result
Melting / freezing pt.:
-47 °C
Atm. press.:
1 013 Pa
Decomposition:
no
Sublimation:
no
Conclusions:
Under the study conditions, the test substance showed no melting point but a glass transition at -47 °C.
Executive summary:

A study was conducted to determine the melting point of the test substance according to OECD Guideline 102 and EU Method A.1. Since the resins are liquid at room temperature, the glass transition/melting was measured at the test substance ambient temperatures using conventional differential scanning calorimetry (DSC). A sample of ≈10 mg was loaded in a standard aluminum crucible (40 µL) fitted with a pierced lid. The measurements were conducted at a linear heating rate of 10 °C min-1 using commercial DSC equimpment (Mettler DSC823e or Q10 from TA Instruments). The DSC cell was flushed with nitrogen gas at a flow rate of 50 mL min-1. Under the study conditions, the test substance showed no melting point but a glass transition at -47 °C (Boutreau, 2017).

Description of key information

The melting point / freezing point was determined according to OECD Guideline 102 and EU Method A.1 (Boutreau, 2017).

Key value for chemical safety assessment

Additional information

No melting point but a glass transition at -47 °C.