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EC number: 203-382-9 | CAS number: 106-30-9
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:
- 2016-01-25 to 2106-01-27
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Reason / purpose for cross-reference:
- reference to same 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
- Qualifier:
- according to guideline
- Guideline:
- EPA OPPTS 830.7200 (Melting Point / Melting Range)
- Deviations:
- no
- GLP compliance:
- no
- Type of method:
- differential scanning calorimetry
- Key result
- Melting / freezing pt.:
- -64.9 °C
- Atm. press.:
- 1 014 hPa
- Conclusions:
- The test item as a melting temperature of -64.9 °C at atmospheric pressure (1014 hPa).
- Executive summary:
The melting point was determined by differential scanning calorimetry according to Regulation EC No. 440/2008 Method A.1. and OECD Test Guideline 102 (1995). Two replicate measurements were performed. The test item was found to have a melting temperature of -64.9 °C at atmospheric pressure (1014 hPa).
Reference
During the heating phase a distinct endothermic effect was observed in the temperature range of -70 to -50 °C, which can be assigned to the melting of the test item. As the onset temperatures in both tests deviate by less than 0.5K from their mean value of -64.85 °C, the test item has a melting point of -64.9 °C.
| Replicate | amount of test item (mg) | Onset of effect (°C) | Range of effect (°C) | weight loss (mg) | Atmospheric pressure (hPa) |
| 1 | 14.17 | -64.82 | -70 to -50 (endo) | 14.17 | 1017.1 |
| 2 | 14.08 | -64.87 | -70 to -50 (endo) | 13.98 | 1014.0 |
Description of key information
The test item has a melting temperature of -64.9 °C at atmospheric pressure (1014 hPa).
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- -64.9 °C
Additional information
One experimental study assessing the melting temperature by differential scanning calorimetry, according to OECD Test guideline 102 is available. This study has been used as key study for this endpoint. The result taken from the renowned reference handbooks CRC Handbook, was used as supporting evidence.
According to the experimental study, the test item has a melting temperature of -64.9 °C, which is well in line with the results found in CRC Handbook, -66.1 °C.
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