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EC number: 206-031-8 | CAS number: 292-64-8
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:
- 2021-04-15 - 2021-04-16
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Version / remarks:
- European Commission Regulation (EC) No. 440/2008
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Version / remarks:
- 1995
- Deviations:
- no
- GLP compliance:
- no
- Type of method:
- differential scanning calorimetry
- Key result
- Melting / freezing pt.:
- 14.5 °C
- Atm. press.:
- ca. 1 013.25 hPa
- Decomposition:
- no
- Conclusions:
- The DSC measurements (-80 to 25 °C) showed that the test item had a melting point of 14.5 °C
- Executive summary:
A study was conducted according to OECD test guideline 102, Regulation (EC) No 440/2008 method A.1. The melting range was determined by differential scanning calorimetry (DSC -80 - 25 °C). The test item and the reference were heated up from the starting temperature to the final temperature at a constant heating rate in a defined atmosphere (nitrogen). Open crucibles were used as containers for the test item and as empty reference crucible. The quantity of heat absorbed or released was measured and recorded. The DSC measurements (-80 to 25 °C) showed that the test item had a melting point of 14.5 °C under atmospheric conditions.
Reference
The test item was cooled down to -80 °C with a cooling rate of 10 K/min, -80 °C were kept for 60 min and afterwards the test item was heated up to 25 °C with a heating rate of 10 K/min. During cooling down the measurements showed an exothermal effect (solidification) in the temperature range of (-5) – (-15 °C) and during heating up an endothermal effect (melting) in the temperature range of 10 – 25 °C. The solidification most likely took place at lower temperatures than the melting due to supercooling.
Melting point (DSC measurements)
Ident No. | Test item/ mg | Starting temperature / °C | Final test temperature / °C | Temperature range (melting) /°C | Onset / °C | Crucible | Observations after the measurement |
39518 | 14.19 | -80 | 25 | 10-25 | 14.54 | Aluminium with a hole | Test item was visually unchanged |
39519 | 16.29 | -80 | 25 | 10-25
| 14.41 | Aluminium with a hole | Test item was visually unchanged |
The test item had a melting point of 14.5 °C.
Description of key information
The test item had a melting point of 14.5 °C (reference 4.2-1).
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- 14.5 °C
Additional information
A study was conducted according to OECD test guideline 102, Regulation (EC) No 440/2008 method A.1. The melting point was determined by differential scanning calorimetry (DSC -80 - 25 °C). The test item and the reference were heated up from the starting temperature to the final temperature at a constant heating rate in a defined atmosphere (nitrogen). Open crucibles were used as containers for the test item and as empty reference crucible. The quantity of heat absorbed or released was measured and recorded. The test item had a melting point of 14.5 °C under atmospheric condition
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