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EC number: 208-235-2 | CAS number: 517-23-7
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
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- EPA OPPTS 830.7200 (Melting Point / Melting Range)
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- differential scanning calorimetry
- Melting / freezing pt.:
- -13.8 °C
- Atm. press.:
- ca. 1 013 hPa
- Conclusions:
- The test item has a melting point of -13.8°C
- Executive summary:
The determination of the melting point was carried out according to OECD Test guideline 102 and the European Commission Council Regulation (EC) No. 440/2008, Annex, Part A, A.1 by differential scanning calorimetry (DSC).
The test item was cooled down from ambient temperature to - 50 °C with a cooling rate of 10 K/min. When - 50 °C have been reached, the samples were kept for 60 min at this temperature. Afterwards, they were heated up from - 50 °C to 200 °C and 400 °C, respectively, at a constant heating rate of 10 K/min. The measurements were performed in a defined atmosphere (nitrogen). The quantity of heat absorbed or released was measured and recorded. Aluminium crucibles with
a small hole were used as containers for the test item and as empty reference crucible. The test item has a melting point of -13.8°C.
Reference
The measurements in aluminium crucibles with a hole showed an endothermal effect in the temperature range of -35 -10 °C with onset temperatures of -14.0 °C and -13.7 °C, respectively. A second endothermal effect was observed in the temperature range of 250 - 320 °C.
Description of key information
The determination of the melting point was carried out according to OECD Test guideline 102 and the European Commission Council Regulation (EC) No. 440/2008, Annex, Part A, A.1 by differential scanning calorimetry (DSC).
The test item was cooled down from ambient temperature to -50 °C with a cooling rate of 10 K/min. When - 50 °C have been reached, the samples were kept for 60 min at this temperature. Afterwards, they were heated up from - 50 °C to 200 °C and 400 °C, respectively, at a constant heating rate of 10 K/min.
The test item has a melting point of -13.8°C.
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- -13.8 °C
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