Registration Dossier
Registration Dossier
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EC number: 252-161-3 | CAS number: 34708-08-2
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:
- 2011-06-10 to 2011-06-16
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Remarks:
- Study conducted in accordance with relevant test method and in compliance with ISO 17025
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Version / remarks:
- 27 July 1995
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Version / remarks:
- 30 May 2008
- Deviations:
- no
- GLP compliance:
- no
- Other quality assurance:
- ISO/IEC 17025 (General requirements for the competence of testing and calibration laboratories)
- Type of method:
- differential scanning calorimetry
- Key result
- Atm. press.:
- 1 013 hPa
- Remarks on result:
- other: No melting was observed between -150°C and +35°C under the condition of the test, but glass transition was observed at -122°C.
- Conclusions:
- No melting was observed for the test substance under the condition of the test between -150°C to +35°C at 1013 hPa, but a glass transition was observed at -122°C. The result is considered to be reliable.
Reference
The DSC measurements were performed twice. After cooling to -150°C at a rate of 2 K/min the sample was heated to 35°C at a rate of 10 K/min. The cooling as well as the heating curve show only a glass transition, indicating that the test item had solidified amorphously. No other thermal effect from crystallisation or melting was registered upon further heating, see attached DSC thermograms.
Melting temperature: No melting point was found between -150 and +35°C under these conditions. A glass transition was observed at -122°C / -122°C.
Description of key information
Melting point: no melting observed between -150 and +35°C at 1013 hPa (OECD 102)
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- -20 °C
Additional information
In a DSC study conducted in accordance with OECD Test Guideline 102 and in compliance with ISO 17025, no melting was observed for the test substance under the conditions of the test between -150 and +35°C at 1013 hPa, but a glass transition was observed at -122°C. The result is considered to be reliable and is selected as key study.
In a secondary source to which no reliability could be assigned, a limit melting point of < -80°C was reported for the substance.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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