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EC number: 200-819-5 | CAS number: 74-88-4
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:
- 06 July 2011 to 07 July 2011
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Principles of method if other than guideline:
- The Differential Scanning Calorimetry method was used. The test material was heated from -150 °C to 0 °C at a constant heating rate in a defined atmosphere. The quantity of heat absorbed or released was measured and recorded.
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- differential scanning calorimetry
- Key result
- Melting / freezing pt.:
- ca. -76.3 °C
- Decomposition:
- no
- Sublimation:
- no
- Remarks on result:
- other: The atmospheric pressure that the test was carried out under were not reported. The test was carried out under a defined atmosphere of pure nitrogen.
- Conclusions:
- Under the conditions of this study, the test material showed a melting point of -76.3 °C, changing its colour to red-brown.
- Executive summary:
The melting point of the test material was investigated in accordance with the standardised guidelines OECD 102 and EU Method A.1, under GLP conditions.
The melting point of the test material was determined using differential scanning calorimetry.
Under the conditions of this study, the test material showed a melting point of -76.3 °C, changing its colour to red-brown.
Reference
- Due to the high volatility of test material the measurements were performed in closed glass crucibles.
- Both measurements in closed glass crucibles showed an endothermic effect in the temperature range -80 to -64 °C. The onset temperature is derived from the intersection of the tangent line with the highest slope of the endothermic peak with the baseline.
- The mean melting point of the test material was -76.3 °C. After the test the test material was liquid and red brown coloured.
Table 1: Results
Indent No. |
Onset (°C) |
Temperature Range (°C) |
Crucible |
31922 |
-76.30 |
-80 to -64 °C |
closed glass crucibles |
31923 |
-76.22 |
-80 to -64 °C |
closed glass crucibles |
Description of key information
Dornhagen 2011
Under the conditions of this study, the test material showed a melting point of -76.3 °C, changing its colour to red-brown.
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- -76.3 °C
Additional information
Dornhagen 2011
The melting point of the test material was investigated in accordance with the standardised guidelines OECD 102 and EU Method A.1, 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 point of the test material was determined using differential scanning calorimetry.
Under the conditions of this study, the test material showed a melting point of -76.3 °C, changing its colour to red-brown.
Merck Index 1996
According to the handbook data the melting point of the test material is -66.5 °C.
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