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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:
2015-06-12 to 2015-06-25
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:
no
Other quality assurance:
ISO/IEC 17025 (General requirements for the competence of testing and calibration laboratories)
Type of method:
differential scanning calorimetry
Key result
Melting / freezing pt.:
< -20 °C
Atm. press.:
998.9 hPa
Decomposition:
yes
Decomp. temp.:
267 °C
Remarks on result:
other: No melting point was found between -150°C and room temperature under these conditions. A glass transition was observed at -119°C

The test item was cooled to -150 °C at a rate of 2 K/min. Upon heating the heat flow curve shows a glass transition at -118/-119 °C, indicating that the test item had solidified amorphously. The DSC thermograms are shown in the document attached (Appendix 1).

Conclusions:
The melting point of the substance was considered to be <-20°C. No melting point was found between -150°C and room temperature, but a glass transiiton was obtained at -119°C using a relevant test method. The result is considered to be reliable.

Description of key information

Melting point: <-20°C (OECD 102)

Key value for chemical safety assessment

Additional information

The melting point of the substance was determined using Differential Scanning Calorimetry (DSC) in accordance with a known quality system (ISO 17025). The melting point of the substance is <-20°C; no melting point was observed between -150°C and room temperature under the conditions of the study, but a glass transition was observed at -119°C. In addition, the substance was observed to undergo decomposition from about 267°C at 998.9 hPa.

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