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EC number: 442-450-4 | CAS number: -
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:
- 21-Mar-2002
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- GLP compliance:
- yes (incl. QA statement)
- Remarks:
- The Swiss GLP Monitoring Authorities
- Type of method:
- differential scanning calorimetry
- Melting / freezing pt.:
- 119.2 °C
- Atm. press.:
- 1 013 hPa
Reference
Results
In the DSC-curve of the preliminary test (heating rate of 20 K/min from 25 °C to 400 °C) the endothermic heat effect (melting) was observed at 123 °C. A second endothermic heat effect was detected at about 280 °C. After the experiment, the sample had lost approx. 46 % of its mass and a brown solid melt remained.
In order to determine the melting point more precisely, further DSC-runs were recorded between 80 °C and 170 °C with a heating rate of 5 K/min. In both runs, the melting of the substance was determined to be 119.2 °C. During these runs, the samples each lost 1.8% of their mass. After the measurement a colorless to slightly white melt remained.
In conclusion, the melting point of the test material was determined to be 119.2 °C (392.4 K).
Table: Results of the individual measurements
|
Heating range (°C) |
Heating rate (K/min) |
Melting point (°C) |
Melting point (K) |
Preliminary test |
25 - 400 |
20 |
123.0 |
396.2 |
1st main study |
80 – 170 |
5 |
119.2 |
392.4 |
2nd main study |
80 - 170 |
5 |
119.2 |
392.4 |
Mean of melting point: Standard deviation (+/-) |
119.2 0.0 |
392.4 0.0 |
||
Description of key information
119.2 °C (OECD 102, differential scanning calorimetry)
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- 119.2 °C
Additional information
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