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EC number: 213-448-9 | CAS number: 950-33-4
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:
- 02-Sep-2014
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline 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 (2009): Freezing point
- GLP compliance:
- no
- Type of method:
- thermal analysis
- Remarks:
- Differential scanning calorimetry (DSC)
- Key result
- Melting / freezing pt.:
- 6.8 - 7 °C
- Atm. press.:
- 1 013 hPa
- Conclusions:
- A melting point value of 6.8 to 7 °C (at 1013 hPa) was determined for the test substance according to E.U. Method A.1.
Reference
Results
In the thermograms of the two DSC runs (nos. PN7387 and PN7397) an endothermic (melting) effect was observed in the temperature range of -10 °C to 25 °C. Between 155 to 310 °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) |
PN7387 |
11.67 |
7.04 274.02 |
-5 to 20 (endo) 160 to 310 (endo) |
11.55 |
1008.3 |
PN7397 |
10.59 |
6.83 272.18 |
-5 to 25 (endo) 160 to 320 (endo) |
10.59 |
1008.5 |
During the heating phase a distinct endothermic effect was observed in the temperature range of -5 to 25 °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 0.5K from their mean value of 6.94 °C, this temperature can be used as the melting point. The test item has a melting point of 6.8 to 7.0 °C.
Final Results
The test item [trade name] has a melting point of 6.8 to 7.0 °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).
Description of key information
Melting point: 6.8 to 7 °C at 1013 hPa (EU Method A.1, differential scanning calorimetry)
Key value for chemical safety assessment
Additional information
A melting point value of 6.8 to 7 °C (at 1013 hPa) was determined for the test substance according to E.U. Method A.1.
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