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EC number: 269-130-5 | CAS number: 68187-85-9
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:
- 22 Feb - 13 Mar 2018
- 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:
- OECD Guideline 102 (Melting point / Melting Range)
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Type of method:
- differential scanning calorimetry
- Melting / freezing pt.:
- < -20 °C
- Atm. press.:
- 1 013 hPa
Reference
Results
Two DSC measurements in an aluminium crucible with a hole were
performed. The test item was cooled down with a cooling rate of 1 K/min
(-50 °C for the 1st measurement and -80 °C for the 2nd
measurement), the minimum temperature was kept for 60 min (1st
measurement) and 300 min (2nd measurement) and
afterwards the test item was heated up with a heating rate of 10 K/min
(maximum temperature 25 °C). The measurements showed no endothermal
effect in the temperature range of -80 to 25 °C.
Table 1: Melting point – DSC measurements
Test item [mg] |
Starting temperature [°C] |
Final test temperature [°C] |
Temperature range (endothermal) [°C] |
Onset (melting) [°C] |
Crucible |
Observations after the measurement |
16.77 |
-50 |
25 |
No endothermal effect observed |
No endothermal effect observed |
Aluminium with a hole |
Test item unchanged |
12.06 |
-80 |
Conclusion: No melting point was measured above -80 °C. However, since melting may be hindered at low temperatures due to supercooling it should only be assumed that no melting point exists above -20 °C.
Description of key information
< -20 °C at 1013 hPa (DSC, OECD 102)
Key value for chemical safety assessment
Additional information
No melting point was measured above -80 °C. However, since melting may be hindered at low temperatures due to supercooling it should only be assumed that no melting point exists above -20 °C.
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