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EC number: 224-957-0 | CAS number: 4573-50-6
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:
- 22 April to 14 June 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)
- GLP compliance:
- no
- Type of method:
- differential scanning calorimetry
- Key result
- Melting / freezing pt.:
- >= -36 - <= -32 °C
- Atm. press.:
- >= 987 - <= 1 012 hPa
- Decomposition:
- no
- Conclusions:
- A melting range of -36 to -32 °C (at 987 and 1012 hPa, respectively) was determined for the test substance according to E.U. Method A.1.
Reference
Results
In the temperature range of -50 to -20 °C an endothermic effect (melting) was observed. Between approx. 120 - 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] |
PN10938 |
15.74 |
-35.52 235.07 |
-50 to -20 (endo) 150 – 260 (endo) |
15.66 |
1012 |
PN11246 |
17.46 |
-32.43 233.86 |
-50 to -20 (endo) 120 – 260 (endo) |
17.38 |
987.3 |
During the cooling phase, an exothermal effect was observed in the temperature range of -60 to -70 °C, which can be assigned to the freezing of the test item.
During the heating phase a distinct endothermic effect was observed in the temperature range of -50 to -20 °C, which can be assigned to the melting of the test item. As the onset temperatures in both tests deviate more than 0.5 K from their mean value of -33.98 °C, the test item has a melting range of -32 °C to -36 °C.
The test item showed a second endothermic signal in the temperature range of approx. 120 – 260 °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 range of -36 °C to -32 °C at atmospheric pressure (987 and 1012 hPa respectively) 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 range: -36 to -32 °C at 987 and 1012 hPa, respectively (EU Method A.1, differential scanning calorimetry)
Key value for chemical safety assessment
Additional information
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