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EC number: 619-228-2 | CAS number: 96556-05-7
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:
- 03 September 2014 to 16 November 2014
- 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:
- 2008
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- method to determine freezing temperature
- Key result
- Melting / freezing pt.:
- < -20 °C
- Conclusions:
- Under the conditions of this study the freezing temperature of the test material has been determined to be less than -20 °C (<253 K).
- Executive summary:
The melting/ freezing temperature of the test material was investigated in accordance with the standardised guidelines OECD 102 and EU Method A.1., under GLP conditions.
An aliquot (approximately 15 mL) of test material was placed into a test tube containing a thermometer and a connection to a nitrogen line. A wire loop with which the sample could be agitated was placed inside the tube to ensure sample homogeneity during cooling. The test tube was surrounded by a glass jacket and then placed into a large beaker containing a dry ice/acetone mixture. The temperature and observations of the test material were recorded approximately every 30 seconds.
The test material was sampled under nitrogen and remained under nitrogen throughout the test. The dry ice/acetone bath was maintained until the sample temperature had reached below -20 °C or until the test material solidified. The determination was carried out in duplicate.
In both determinations the test material did not freeze during cooling.
Under the conditions of this study the freezing temperature of the test material has been determined to be less than -20 °C (<253 K).
Reference
Determination 1
Observations: The test material did not freeze during cooling.
Result: Freezing temperature: <-20 °C (<253 K).
Determination 2
Observations: The test material did not freeze during cooling.
Result: Freezing temperature: <-20 °C (<253 K).
Description of key information
Under the conditions of this study the freezing temperature of the test material has been determined to be less than -20 °C (<253 K).
Key value for chemical safety assessment
Additional information
The melting/ freezing temperature of the test material was investigated in accordance with the standardised guidelines OECD 102 and EU Method A.1., under GLP conditions. The study was awarded a reliability score of 1 in accordance with the criteria set forth by Klimisch et al. (1997).
An aliquot (approximately 15 mL) of test material was placed into a test tube containing a thermometer and a connection to a nitrogen line. A wire loop with which the sample could be agitated was placed inside the tube to ensure sample homogeneity during cooling. The test tube was surrounded by a glass jacket and then placed into a large beaker containing a dry ice/acetone mixture. The temperature and observations of the test material were recorded approximately every 30 seconds.
The test material was sampled under nitrogen and remained under nitrogen throughout the test. The dry ice/acetone bath was maintained until the sample temperature had reached below -20 °C or until the test material solidified. The determination was carried out in duplicate.
In both determinations the test material did not freeze during cooling.
Under the conditions of this study the freezing temperature of the test material has been determined to be less than -20 °C (<253 K).
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