Registration Dossier
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EC number: 233-588-4 | CAS number: 10250-45-0
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:
- 25 September 2018 to 26 October 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
- Melting / freezing pt.:
- < -79.5 °C
- Atm. press.:
- 1 022 hPa
- Decomposition:
- no
- Conclusions:
- Under the conditions of this study, the melting temperature of the test material was < -79.5 °C (< 193.7K).
- Executive summary:
The melting temperature of the test material was investigated in accordance with the standardised guidelines OECD 102, EU Method A.1. and EPA 830.7200, under GLP conditions.
Following differential scanning calorimetry, an additional investigation of the melting temperature was performed placing two subsamples of the test material for 19 hours at -21.1 ± 1.9 °C and for 23 hours at -79.5 ± 1.8 °C respectively. It was observed after storage that the test material was a liquid (-21.1 ± 1.9 °C) and a viscous liquid (-79.5 ± 1.8 °C).
Under the conditions of this study, the melting temperature of the test material was < -79.5 °C (< 193.7K).
Reference
Preliminary Test
- Starting at 125 °C, the weight of the sample decreased significantly. At 169 °C, the sample weight had decreased by 25 %.
- After the experiment it was observed that the test material was evaporated from the sample container.
Main Study
- During cooling no effects were observed.
- During heating an endothermic effect was observed between 125 and 225 °C. The extrapolated onset temperature of the effect was 192.511 °C. The endothermic effect was most likely obtained due to boiling of the test material. After the experiment it was observed that the test material had evaporated from the sample container.
- In order to investigate the endothermic effect, a higher heating rate of 50 °C/minute was used in the Experiment 2. The extrapolated onset temperature was 193.948 °C. The endothermic effect had not significantly shifted to higher temperatures. It demonstrated that boiling of the test material caused the endothermic effect. After the experiment it was observed that the test material had evaporated from the sample container.
- Experiment 3 was performed as a duplicate of Experiment 1. Similar results as in Experiment 1 were obtained. The extrapolated onset of the boiling effect was 192.899 °C. After the experiment it was observed that the test material had evaporated from the sample container.
- An additional investigation of the melting temperature of the test material was performed placing two subsamples of the test material for 19 hours at -21.1 ± 1.9 °C and for 23 hours at -79.5 ± 1.8 °C respectively. It was observed after storage that the test material was a liquid (-21.1 ± 1.9 °C) and a viscous liquid (-79.5 ± 1.8 °C). According to this it was concluded that the melting temperature of the test material is < -79.5 °C (<193.7K).
Description of key information
Under the conditions of this study, the melting temperature of the test material was < -79.5 °C (< 193.7K).
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- -79.5 °C
Additional information
The melting temperature of the test material was investigated in accordance with the standardised guidelines OECD 102, EU Method A.1. and EPA 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).
Following differential scanning calorimetry, an additional investigation of the melting temperature was performed placing two subsamples of the test material for 19 hours at -21.1 ± 1.9 °C and for 23 hours at -79.5 ± 1.8 °C respectively. It was observed after storage that the test material was a liquid (-21.1 ± 1.9 °C) and a viscous liquid (-79.5 ± 1.8 °C).
Under the conditions of this study, the melting temperature of the test material was < -79.5 °C (< 193.7K).
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