Registration Dossier
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EC number: 607-708-4 | CAS number: 25359-91-5
Melting point / freezing point
Administrative data
Link to relevant study record(s)
- Endpoint:
- melting point/freezing point
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 16 March 2018 to 11 April 2018
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Version / remarks:
- 1995
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Version / remarks:
- 2016
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EPA OPPTS 830.7200 (Melting Point / Melting Range)
- Version / remarks:
- 1998
- Deviations:
- no
- GLP compliance:
- yes
- Type of method:
- differential scanning calorimetry
- Key result
- Decomposition:
- yes
- Decomp. temp.:
- > 250 °C
- Conclusions:
- Under the conditions of this study melting of the test material was not observed below the temperature at which reaction and/or decomposition started. Based on this, the test material has no melting temperature.
- Executive summary:
The melting point of the test material was investigated in accordance with the standardised guidelines OECD 102, EU Method A1 and OPPTS 830.7200, under GLP conditions.
The melting temperature of the test material was tested by DSC.
Under the conditions of this study melting of the test material was not observed below the temperature at which reaction and/or decomposition started. Based on this, the test material has no melting temperature.
Reference
Preliminary Test
- Starting at 150 °C, the weight of the sample decreased significantly. At 549 °C, the sample weight had decreased by 25 %.
- After the experiment, a black charred residue remained in the sample container (original colour: Red-brown). The change of the residue indicated reaction and/or decomposition of the test material.
Main Study
- An endothermic peak was observed between 50 and 200 °C directly followed by an exothermic effect starting at 250 °C.
- The endothermic effect was most likely obtained due to evaporation of impurities of the test material. The exothermic effect was probably obtained due to reaction and/or decomposition of the test material.
- After the experiment, a black charred residue remained in the sample container (original colour: Red-brown). The change of the residue indicated reaction and/or decomposition of the test material.
Conclusion
- The melting temperature of the test material was tested by DSC.
- Reaction and/or decomposition of the test material was observed during DSC experiment at temperatures of > 250 °C (> 523K). Melting of the test material was not observed below the temperature at which reaction and/or decomposition started. Based on this, the test material has no melting temperature.
Description of key information
Under the conditions of this study melting of the test material was not observed below the temperature at which reaction and/or decomposition started. Based on this, the test material has no melting temperature.
Key value for chemical safety assessment
Additional information
The melting point of the test material was investigated in accordance with the standardised guidelines OECD 102, EU Method A1 and OPPTS 830.7200, under GLP conditions. The study was awarded a reliability score of 1 in accordance with the criteria set forth by Klimisch et al. (1997).
The melting temperature of the test material was tested by DSC.
Under the conditions of this study melting of the test material was not observed below the temperature at which reaction and/or decomposition started. Based on this, the test material has no melting temperature.
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