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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:
June 05, 2019 to June 17, 2019
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
Key result
Melting / freezing pt.:
>= 256 - <= 258 °C
Atm. press.:
>= 1 003 - <= 1 015 hPa
Decomposition:
no

Melting point / melting range: DSC measurement

Two DSC measurements with a heating rate of 10 K/min showed an endothermal effect (melting) in the temperature range of 235 – 270 °C. The onset temperature (see Table 1) was derived from the intersection of the tangent line with the highest slope of the endothermal peak with the baseline.

The results of the DSC measurements are summarized in Table 1.

Table 1: Melting point (DSC measurements)

 Ident No.  Test item / mg  Starting temperature / °C Final test temperature / °C   Temperature range (endothermal) / °C  Onset (melting) / °C  Crucible  Observations after the measurement
 38694  9.30   25 300   240 – 270  256.83 Aluminium with a hole   Orange melt, no mass loss
 38709  10.42  25  500  235 –270  258.00  Aluminium with a hole  Test item discoloured black, mass loss: 24 %

                                              

The test item had a melting range of 256 – 258 °C.

Executive summary:

The test item had a melting range of 256 – 258 °C.

Description of key information

The test item had a melting range of 256 – 258 °C.

Key value for chemical safety assessment

Additional information