Registration Dossier
Registration Dossier
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EC number: 226-070-4 | CAS number: 5261-31-4
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:
- From May 10, 2016 to May 24, 2016
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline 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)
- GLP compliance:
- not specified
- Type of method:
- differential scanning calorimetry
- Key result
- Melting / freezing pt.:
- 121.8 °C
- Atm. press.:
- 101 325 Pa
- Decomposition:
- yes
- Remarks:
- exothermal decomposition
- Decomp. temp.:
- 265 °C
- Conclusions:
- Under the study conditions, the melting temperature of the test substance was determined to be 121.8°C.
- Executive summary:
A study was conducted to determine the melting /freezing point of the test substance according to OECD Guideline 102 and EU Method A.1. Two procedures were used: differential scanning calorimetry measurements and the capillary method. Two DSC measurements showed endothermal effects at the temperature range of 105 -135°C and 100 - 140°C. At 265°C, an exothermal decomposition started. The capillary method showed that the test substance melted within a temperature range of 120 - 129°C. Under the study conditions, the melting temperature of the test substance was determined to be 121.8°C (Dornhagen, 2016).
Reference
Table 1. DSC measurements
| Test subst. (mg) | Starting Temp. (°C) | Final test Temp. (°C) | Temp. range (melting, °C) | Onset (°C) | Crucible | Observations |
| 9.39 | 30 | 400 | 105 -135 | 122.1 | Aluminium with a hole | Black test substance after the measurement; mass loss 4.96 mg |
| 8.91 | 30 | 200 | 100 -140 | 121.4 | Aluminium with a hole | The test substance was a black melt after the measurement; no mass loss |
At 265°C, an exothermal decomposition started.
Table 2. Capillary tube in a metal block results
| Set point (°C) | Heating rate (K/min) | End point (°C) | Remarks |
| 80 | 10 | 160 | Approx. 80°C: no changes Approx. 120°C: melting starts Approx. 129°C: complete melting Approx. 160°C: no further changes |
The filling height of the test substance was approximately 5 mm.
Description of key information
The melting point was determined according to OECD Guideline 102 and EU Method A.1 (DSC and capillary tube method) (Dornhagen, 2016).
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- 121.8 °C
Additional information
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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