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EC number: 945-924-3 | CAS number: -
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:
- 26-Aug-2014 to 27-Aug-2014
- 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:
- EU Method A.1 (Melting / Freezing Temperature)
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Qualifier:
- according to guideline
- Guideline:
- EPA OPPTS 830.7200 (Melting Point / Melting Range)
- GLP compliance:
- no
- Type of method:
- thermal analysis
- Remarks:
- Differential scanning calorimetry (DSC)
- Key result
- Melting / freezing pt.:
- -56.2 °C
- Atm. press.:
- 1 013 hPa
- Conclusions:
- A melting point value of -56.2 °C (at 1013 hPa) was determined for the tst substance according to E.U. Method A.1.
- Endpoint:
- melting point/freezing point
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 06-Mar-2015
- 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:
- EU Method A.1 (Melting / Freezing Temperature)
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Qualifier:
- according to guideline
- Guideline:
- EPA OPPTS 830.7200 (Melting Point / Melting Range)
- GLP compliance:
- no
- Type of method:
- thermal analysis
- Remarks:
- Differential scanning calorimetry (DSC)
- Melting / freezing pt.:
- -55.9 °C
- Atm. press.:
- 1 024 hPa
- Conclusions:
- A melting point value of -55.9 °C (at 1013 hPa) was determined for the test substance according to E.U. Method A.1.
Referenceopen allclose all
Results
In the thermograms of the two DSC runs (nos. PN7356 and PN7368) an endothermic (melting) effect was observed in the temperature range of -60 °C to -45 °C. Between 100 to 265 °C a second endothermic effect (boiling) could be detected.
Results of the DSC measurements
No. |
Sample weight (mg) |
Onset of effect (°C) |
Range of effect (°C) |
Weight loss (mg) |
Atmospheric pressure (hPa) |
PN7356 |
10.43 |
-56.19 245.90 |
-60 to -45 (endo) 100 to 265 (endo) |
10.43 |
993.8 |
PN7368 |
12.85 |
-56.10 246.19 |
-60 to -45 (endo) 130 to 260 (endo) |
11.80 |
1004.2 |
The first endothermic effect was observed in the temperature range of -60 to -45 °C, which can be associated with the melting of the test item. As the onset temperatures in both tests do not deviate by more than 0.5 K from their mean value of -56.15 °C, this temperature can be used as the melting point. The test item has a melting point of -56.2 °C.
Final Results
The test item has a melting point of -56.2 °C at atmospheric pressure (1013 hPa) as determined by differential scanning calorimetry according to Directive EC440/2008 Method A.1., OECD Test Guideline 102 (1995), EPA OCSPP 830.7200 (1998) and CIPAC MT 1 (2009).
At ambient conditions, the test item is a liquid. Therefore the crucibles were cooled down from ambient temperature to -100 °C with a constant cooling rate of 0.25 K/min under an inert atmosphere. After a waiting period of 30 min at -100 °C, the temperature was increased up to 500 °C at a constant heating rate of 10 K/min.
Results
In the thermograms of the two DSC runs (nos. PN8424 and PN8425) an endothermic (melting) effect was observed in the temperature range of -60 °C to -50 °C. Between 100 to 260 °C a second endothermic effect (boiling) could be detected.
Results of the DSC measurements
No. |
Sample weight (mg) |
Onset of effect (°C) |
Range of effect (°C) |
Weight loss (mg) |
Atmospheric pressure (hPa) |
PN8424 |
11.42 |
-55.86 243.75 |
-60 to -50 (endo) 110 to 260 (endo) |
11.42 |
1024.2 |
PN8425 |
10.43 |
-55.95 243.69 |
-60 to -50 (endo) 100 to 260 (endo) |
10.43 |
1024.2 |
During the cooling phase no thermal effect was detected. During the heating phase an endothermic effect was observed in the temperature range of -60 to -50 °C, which can be associated with the melting of the test item. As the onset temperatures in both tests do not deviate by more than 0.5 K from their mean value of -55.91 °C, this temperature can be used as the melting point. The test item has a melting point of -55.9 °C.
Final Results
The test item has a melting point of -55.9 °C at atmospheric pressure (1024 hPa) as determined by differential scanning calorimetry according to Directive EC440/2008 Method A.1., OECD Test Guideline 102 (1995), EPA OCSPP 830.7200 (1998) and CIPAC MT 1 (2009).
Description of key information
Melting point
Composition A: -56.2 °C at 1013 hPa (EU Method A.1, differential scanning calorimetry)
Composition B: -55.9 °C at 1013 hPa (EU Method A.1, differential scanning calorimetry)
Key value for chemical safety assessment
Additional information
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