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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:
April 08, 2019 to April 08, 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.:
271.3 °C

Individual results

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 250 – 285 °C. The onset temperature (seeTable1) 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 (endo-thermal) /

°C

Onset (melting) / °C

Crucible

Observations after the measurement

38625

9.29

25

500

250 – 285

271.33

Aluminium with a hole

Test item discoloured to black, mass loss: 32 %

38627

7.93

25

300

255 – 285

271.34

Aluminium with a hole

Test item was a orange melt, no mass loss

The test item had a mean melting point of 271.3 °C.


 

Executive summary:

 Final results

Melting point / melting range

The test item had a melting point of 271.3 °C.

Description of key information

The test item had a melting point of 271.3 °C.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
271.3 °C

Additional information