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EC number: 614-257-7 | CAS number: 68071-40-9
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 Feb - 04 Feb 2016
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Remarks:
- GLP guideline study
- Reason / purpose for cross-reference:
- reference to other study
- Reason / purpose for cross-reference:
- reference to other study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Version / remarks:
- adopted in 1995
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Version / remarks:
- adopted in 2008
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EPA OPPTS 830.7200 (Melting Point / Melting Range)
- Version / remarks:
- adopted in 1998
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- other: CIPAC MT 1 (2009): Freezing Point
- Version / remarks:
- adopted in 2009
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Remarks:
- Hess. Ministerium für Umwelt, Energie, Landwirtschaft und Verbraucherschutz,Wiesbaden, Germany
- Type of method:
- differential scanning calorimetry
- Specific details on test material used for the study:
- Storage conditions: Ambient temperature (< 40 °C), keep container tightly closed, protected from sunlight.
- Key result
- Melting / freezing pt.:
- ca. -11.1 °C
- Atm. press.:
- >= 1 003 - <= 1 004 hPa
- Conclusions:
- The melting point was determined to ca. -11.1°C
- Executive summary:
The melting point was determined to ca. -11.1°C
Reference
An endothermic effect (melting) was observed in the temperature range of -50 to 10 °C.
Table 1 – DSC measurement results
Sample weight [mg] |
Onset of effect [°C] |
Range of effect [°C] |
Weight loss [mg] |
Atmospheric pressure [hPa] |
13.25 |
-10.95 |
-50 to 10 (endo) 200 to 440 (exo) |
12.69 |
1002.8 |
14.20 |
-11.23 |
-50 to 10 (endo) 200 to 460 (exo) |
12.34 |
1003.7 |
The test item showed an exothermic effect during the cooling phase in the temperature range of 0 to -20 °C, which is assigned to the freezing of the test item.
An endothermic effect was seen during the subsequent heating phase in the temperature range of -50 to 10 °C, which is assigned to melting of the test item. The onset temperatures in both tests did not deviate by more than 0.5 K from their mean value of -11.09 °C, therefore this temperature can be used as melting point, i.e. the test item has a melting point of -11.1 °C.
Description of key information
The melting point was determined to ca. -11.1°C
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- 11.1 °C
Additional information
The melting point was determined to ca. -11.1°C
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