Registration Dossier
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EC number: - | CAS number: 20126-76-5
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 30 May 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.:
- >= -23 - <= -21 °C
- Atm. press.:
- >= 991 - <= 1 012 hPa
- Conclusions:
- A melting range of -23 to -21 °C (at 1012 or 991 hPa, respectively) was determined for the test substance according to E.U. Method A.1.
Reference
Results
In the temperature range of -30 to 10 °C, an endothermic effect (melting) was observed.
Results of the DSC-measurements
No. |
Sample weight / mg |
Onset of Effect / °C |
Range of effect / °C |
Weight loss / mg |
Atmospheric pressure / hPa |
PN10937 |
16.22 |
-21.56 |
-30 to 10 (endo) |
16.22 |
1012 |
PN11163 |
22.82 |
-22.71 |
-30 to 10 (endo) |
22.79 |
990.9 |
During the cooling phase, an exothermal effect was observed in the temperature range of approx. -19 to -23 °C, which can be assigned to the freezing of the test item.
During the heating phase an endothermic effect was observed in the temperature range of -30 to 10 °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 -22.14 °C, the test item has a melting range of -21 to -23 °C.
Final Results
The test item has a melting range of -21 to -23 °C at atmospheric pressure (991 hPa or 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: -23 °C at 1012 hPa to -21 °C at 991 hPa (E.U. Method A.1., differential scanning calorimetry)
Key value for chemical safety assessment
Additional information
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