Registration Dossier
Registration Dossier
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EC number: 203-656-8 | CAS number: 109-21-7
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
- Study period:
- 2016-09-14 to 2016-12-08
- 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)
- Version / remarks:
- May 2008
- Deviations:
- no
- GLP compliance:
- no
- Type of method:
- method to determine freezing temperature
- Key result
- Melting / freezing pt.:
- < -35 °C
- Atm. press.:
- >= 985.8 - <= 989.4 mBar
- Remarks on result:
- other: No phase transition observed
- Conclusions:
- The freezing point of the test item is < -35°C at 989 to 986 mBar.
- Executive summary:
The freezing temperature was assessed according to OECD 102, using a crystallization tube. The test item was cooled from 20°C to -40°C with a rate of 1°C/min. No phase transition was observed, the test item remained liquid and only several small crystals in the liquid were observed. It is hence concluded that the freezing temperature is < -35°C at 989 to 986 mBar.
Reference
The temperature in the crystallisation tube with the test item steadily followed the temperature of the bath in the main test.
No typical effect indicating a phase transition was observed. At the end of the measurement, the test item was liquid and only several small crystals in the liquid were observed.
Description of key information
For this endpoint two studies are available. A recent experimental study (2016) was performed according to OECD 102. The study showed that the freezing temperature of the test item is < -35°C at 986 to 989 mbar. According to the CRC Handbook (1993) the freezing temperature is -91°C. This result is used as supporting information.
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- -35 °C
Additional information
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