Registration Dossier
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EC number: 241-481-9 | CAS number: 17464-91-4
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:
- May 08, 2018 - May 14, 2018
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Deviations:
- no
- GLP compliance:
- no
- Type of method:
- differential scanning calorimetry
- Key result
- Melting / freezing pt.:
- 153.9 °C
- Decomposition:
- yes
- Decomp. temp.:
- > 180 °C
- Executive summary:
The test item had a mean melting point of 153.9 °C. Above 180 °C exothermal decomposition occurred.
Reference
Melting point / melting range: DSC measurement
DSC measurements with a heating rate of 10 K/min showed an endothermal effect (melting) in the temperature range of 125 – 170 °C. Above 180 °C exothermal decomposition followed. The onset temperature (seeTable1) was derived from the intersection of the tangent line with the highest slope of the endothermal peak with the baseline. Visual inspection of the crucibles after the experiment, which were stopped before the exothermal decomposition, showed a melt.
The results of the DSC measurements are summarized in Table 1.
Table1: Melting point (DSC measurements)
Ident No. |
Test item / mg |
Starting temperature / °C |
Final test temperature / °C |
Temperature range (endo-thermal) / °C |
Onset (melting) / °C |
Crucible |
Observations after the measurement |
36999 |
11.46 |
25 |
500 |
125 – 170 |
153.7 |
Aluminium with a hole |
Test item was a black solid: 90 % mass loss |
37001 |
12.83 |
25 |
180 |
130 – 165 |
154.2 |
Aluminium with a hole |
Test item was a green melt: no mass loss |
38009 |
12.75 |
25 |
184 |
130 – 165 |
153.9 |
Aluminium with a hole |
Test item was a dark melt: no mass loss |
The test item had a mean melting point of 153.9 °C.
Description of key information
The test item had a mean melting point of 153.9 °C. Above 180 °C exothermal decomposition occurred.
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- 153.9 °C
Additional information
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