Registration Dossier
Registration Dossier
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EC number: 218-451-9 | CAS number: 2155-60-4
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:
- 02 November 2015 - 17 December 2015
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Reason / purpose for cross-reference:
- reference to same study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Version / remarks:
- 2008
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Version / remarks:
- 1995
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EPA OPPTS 830.7200 (Melting Point / Melting Range)
- Version / remarks:
- 1998
- Deviations:
- no
- Principles of method if other than guideline:
- The freezing point of the substance could not be determined from the DSC experiments according to the EC A.1, OECD 102 and OPPTS 830.7200 test guidelines. An additional experiment was therefore performed in which the consistency of the substance was determined by visual observation after storage in freezers at -20°C and -80°C. The additional experiment is not a guideline study but described in sufficient detail.
- GLP compliance:
- yes
- Type of method:
- other: visual observation after storage in freezer
- Key result
- Melting / freezing pt.:
- > -80 - < -20 °C
- Remarks on result:
- other: Result of the visual observation after storage in freezers
- Conclusions:
- The freezing temperature of the substance was determined to be between -80°C - and -20°C.
- Executive summary:
The freezing point of the substance could not be determined using differential scanning calorimetry in a GLP study according to EC A.1, OECD 102 and OPPTS 830.7200.
In an additional GLP experiment, the freezing temperature was determined by visual observation after storage in freezers. No guideline was followed. After storage at ca. -20°C, the test substance was observed to be a liquid. After storage at ca. -80°C, the test substance was observed to be a solid. Based on these results, it was concluded that the freezing temperature of the substance is between -80°C and -20°C.
Reference
DSC experiments: in none of the 4 experiments, melting/freezing was observed in the temperature range tested (-90°C to 25°C).
Visual observation after storage in freezers:
- After storage at ca. -20°C, the test substance was observed to be a liquid
- After storage at ca. -80°C, the test substance was observed to be a solid.
Based on these results, the freezing point is concluded to be >-80 - <-20°C.
Description of key information
The freezing temperature of the substance was determined to be between -80°C and -20°C.
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- -20 °C
Additional information
Determined by visual observation after storage in freezers.
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