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EC number: 264-036-0 | CAS number: 63225-53-6
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:
- 14 Oct. - 15 Oct. 2014
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Reason / purpose for cross-reference:
- reference to other study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Qualifier:
- according to guideline
- Guideline:
- EPA OPPTS 830.7200 (Melting Point / Melting Range)
- Qualifier:
- according to guideline
- Guideline:
- other: CIPAC MT 1
- GLP compliance:
- yes (incl. QA statement)
- Remarks:
- Hess. Ministerium für Umwell, Energie, Landwirtschaft und Verbraucherschutz, Wiesbaden, Germany
- Type of method:
- differential scanning calorimetry
- Melting / freezing pt.:
- -1 °C
- Atm. press.:
- 1 013 hPa
- Remarks on result:
- other: melting point
- Melting / freezing pt.:
- >= -18 - <= -15 °C
- Atm. press.:
- 1 013 hPa
- Remarks on result:
- other: freezing range
Reference
Results of the DSC-measurements
No. |
Sample weight / mg |
Onset of Effect/ °C |
Range of effect / °C |
Air pressure / hPa |
Remark |
PN7694 |
12.37 |
-18.11 |
-30 - -10 |
997.8 |
Cooling |
-0.59 |
-40 - 10 |
Heating |
|||
PN7696 |
12.38 |
-15.02 |
-20 - -10 |
995.8 |
Cooling |
-1.17 |
-40 -10 |
Heating |
During the cooling to -100 °C a small exothermic effect could be detected in the temperature range of -30 - 10 °C, which can be associated with the freezing of the test item. As the onset temperatures in both tests deviate by more than 0.5 K from their mean value of -16.57 °C, the test item has a freezing range from -18 °C to -15 °C.
During the subsequent heating phase a distinct endothermic effect was observed in the temperature range of -40 - 10 °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 -0.88 °C, this temperature can be used as melting point. The test item has a melting point of -1 °C.
Description of key information
Melting point: -1 °C at 1013 hPa (OECD 102, A. 1.)
Freezing range: -18 °C - -15 °C at 1013 hPa (OECD 102, A. 1.)
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- -1 °C
Additional information
The melting point of the substance was determined by using Differential Scanning Calorimetry (DSC) method.
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