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Physical & Chemical properties

Melting point / freezing point

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Administrative data

Link to relevant study record(s)

Reference
Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2018-08-27 to 2018-11-14
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Deviations:
no
Qualifier:
according to guideline
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Deviations:
no
GLP compliance:
no
Type of method:
differential scanning calorimetry
Key result
Melting / freezing pt.:
> 500 °C
Decomposition:
no
Sublimation:
no
Remarks on result:
not determinable
Remarks:
No melting point was observed up to 500 °C.

A measurement in an aluminium crucible with a hole showed an exothermal effect starting at 40 °C. This effect was not observed in a measurement in a closed glass crucible. Therefore and in order to exclude any reaction with the material of the crucible the measurement was repeated in an open glass cruciblel. The DSC measurement in an open glass crucible showed no endothermal or exothermal effects up to 500 °C. After the measurement the test item was a powder. The mass loss after the DSC measurement amounted to 1 %.

Under consideration of the result from the DSC measurement it was concluded that the test item had no melting point and no boiling point under atmospheric pressure up to 500 °C.

ldent

No.

Test item / mg

Starting temperature / °C

Final test temperature / °C

Temperature range / °C

Crucible

Observations after the measurement

38355

17.13

25

500

---

Glass, open

Test item was a powder after the measurement;

mass loss: 1 %
Conclusions:
No melting point was observed up to 500 °C.
Executive summary:

A study was conducted in order to determine the melting point of the test item according to OECD test guideline 102 and European Commission Regulation (EC) No. 440/2008, Method A.1. Differential scanning calorimetry (DSC) measurements were performed between 25 °C and 500 °C. The measurement in an open glass crucible showed no endothermal or exothermal effects up to 500 °C. After the measurement the test item was a powder. The mass loss after the DSC measurement amounted to 1 %. Therefore, it was concluded that the test item had no melting point under atmospheric pressure up to 500 °C.

Description of key information

No melting point was observed up to 500 °C (reference 4.2-1).

Key value for chemical safety assessment

Additional information

A study was conducted in order to determine the melting point of the test item according to OECD test guideline 102 and European Commission Regulation (EC) No. 440/2008, Method A.1. Differential scanning calorimetry (DSC) measurements were performed between 25 °C and 500 °C. The measurement in an open glass crucible showed no endothermal or exothermal effects up to 500 °C. After the measurement the test item was a powder. The mass loss after the DSC measurement amounted to 1 %. Therefore, it was concluded that the test item had no melting point under atmospheric pressure up to 500 °C.