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EC number: 268-626-9 | CAS number: 68131-73-7
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:
- 04 February 2010 - 12 February 2010
- 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:
- 27th July 1995
- Deviations:
- yes
- Remarks:
- Only one temperature: -25 °C
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Version / remarks:
- 18 march 2002
- Deviations:
- yes
- Remarks:
- Heating was omitted
- Principles of method if other than guideline:
- The sample is a fluid at + 20 °C. Literature indicates that the freezing point is < - 20 °C. A pour point analysis is performed at only one temperature such as - 25 °C.
- GLP compliance:
- no
- Type of method:
- pour point
- Melting / freezing pt.:
- < -20 °C
- Atm. press.:
- 101 325 Pa
- Conclusions:
- The freezing point of the substance is below - 20 °C.
- Endpoint:
- melting point/freezing point
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 06 April 2010 - 12 April 2010
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Version / remarks:
- 18 march 2002
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Version / remarks:
- 27th July 1995
- Deviations:
- no
- GLP compliance:
- no
- Type of method:
- thermal analysis
- Remarks:
- DSC
- Melting / freezing pt.:
- < -70 °C
- Atm. press.:
- 101 325 Pa
- Remarks on result:
- other: A glass transition with an onset of -66.8 °C and a midpoint of -66.1 °C was detected.
- Conclusions:
- The freezing point of the substance is below - 70 °C, while a glass transition with Tonset at - 66.8 °C and Tmidpoint at - 66.1 °C was identified.
Referenceopen allclose all
After 1 week the surface of the substance moves very slowly, the substance is still fluid, but highly viscous.
A small rise in temperature may have occurred by removing the tubes from the freezer, however it can be indicated that the freezing point is below - 20 °C.
The substance shows a glass transition, with an endothermic relaxation.
Description of key information
The freezing point of the substance is below -20 °C.
Key value for chemical safety assessment
Additional information
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