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EC number: 947-716-8 | 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:
- 20 to 21 April 2016
- 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)
- Qualifier:
- according to guideline
- Guideline:
- other: CIPAC MT 1 (2009): Freezing Point
- GLP compliance:
- no
- Type of method:
- differential scanning calorimetry
- Key result
- Melting / freezing pt.:
- -53 °C
- Atm. press.:
- 1 017 hPa
- Decomposition:
- no
- Conclusions:
- A melting point of -53 °C (at 1017 hPa) was determined for the test substance according to EU Method A.1
Reference
Results
In the temperature range of -60 to -40 °C, a very small endothermic effect (melting) was observed. Between approx. 180 - 320 °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 |
PN10910 |
19.32 |
-53.25 293.55 |
-60 to -40 (endo) 190 - 320 (endo) |
19.28 |
1017.2 |
PN10911 |
17.70 |
-53.49 292.90 |
-60 to -40 (endo) 180 - 320 (endo) |
17.53 |
1017.2 |
During the cooling phase, no thermal effects were observed, which can be associated with the freezing of the test item.
During the heating phase a very small endothermic effect was observed in the temperature range of -60 to -40 °C, which can be assigned to the melting of the test item. As the onset temperatures in both tests deviate by less than 0.5 K from their mean value of -53.37 °C, the test item has a melting point of -53 °C.
Due to the low energy of the melting peak, the melting of the test item was verified. 5.6 g of the test item in a test tube were cooled down with liquid nitrogen to approx. -65 °C. At this temperature the test item was solid. The appearance of the test item during warming up: between -52 to -45 °C very viscous, at -40 °C liquid. Therefore the melting point in the DSC-measurement was confirmed.
The test item showed a second endothermic signal in the temperature range of approx. 180 - 320 °C that can be assigned to the boiling of the test item.
No further thermal effects were observed up to the maximum test temperature of 500 °C.
Final Results
The test item has a melting point of -53 °C at atmospheric pressure (1017 hPa) as determined by differential scanning calorimetry according to Regulation EC No. 440/2008 Method A.1. and OECD Test Guideline 102 (1995).
Description of key information
Melting point: -53 °C at 1017 hPa (EU Method A.1, differential scanning calorimetry)
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- -53 °C
Additional information
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