Registration Dossier
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EC number: 201-729-9 | CAS number: 87-19-4
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:
- 2016-08-12
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Version / remarks:
- 1995
- 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.:
- -31 °C
- Atm. press.:
- 1 010.4 hPa
- Remarks on result:
- other: mean of 2 measurements, details on results in 'Any other information on results'
- Conclusions:
- The test item has a melting point of -30.71°C at 1010 hPa.
- Executive summary:
The melting point of the test item was assessed according to OECD 102, differential scanning calorimetry. The measurement was performed in duplicate. An endothermic effect was observed in the range of -30 to -20°C. The melting point temperature was derived to be -31°C at atmospheric pressure (1010 hPa).
Reference
During the heating phase, an exothermal effect was observed in the temperature range of -80 to -30 °C, directly followed by a endothermic effect in the temperature range of -30 to -20°C, which can be assigned to the melting of the test item.
The results of the 2 replicate measurements are:
| Replicate | sample weight (mg) | Onset of effect (°C) | Range of effect (°C) | Weight loss (mg) | Atmospheric pressure (hPa) |
| 1 | 17.09 | -30.69 | -30 to -20 (endo) | 17.08 | 1010.4 |
| 2 | 18.45 | -30.73 | -30 to -20 (endo) | 18.45 | 1010.4 |
As the onset temperatures in both tests deviate less than 0.5 K from their mean value of -31 °C, the mean value is used as melting point.
Description of key information
The melting point was determined experimentally according to OECD 102, by differential scanning calorimetry. The test item was found to have a melting point of -31 °C at atmospheric pressure (1010 hPa).
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- -31 °C
Additional information
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