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EC number: 701-392-2 | CAS number: -
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:
- 2012-10-09 to 2013-01-28
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Principles of method if other than guideline:
- Modified liquid bath
- GLP compliance:
- yes
- Type of method:
- thermal analysis
- Melting / freezing pt.:
- > 53 - < 58 °C
- Atm. press.:
- 101 325 Pa
- Decomposition:
- no
- Sublimation:
- no
- Remarks on result:
- other: The substance formed a pale straw coloured crystalline solid priro to melting.
- Conclusions:
- The test substance has a melting range of 53 - 58 °C at atmospheric pressure.
- Executive summary:
Test Guidance
OECD Guideline 102 and EC Method A1
Method and materials
Item is placed in a small glass tube to a depth of approximately 10 mm. A thermometer was attached to the tube and placed in a silicone fluid bath which was heated gradually. The procedure was performed in duplicate. A modified liquid bath method was chosen in preference to the capillary tube due to the physical nature of the substance and the difficulties in observing the melting phase.
Result
The test substance has a melting range of 53 - 58 °C at atmospheric pressure.
Reference
See attached tables for melting point observations
Although an endotherm was observed in the thermograms of the boiling temperature determinations, there was no such distinct endotherm performed at a heating rate of 1°C/min as preferred for measurement of melting points. Because of this, it was decided to determine the melting temperature using a liquid bath method. Also the melting point endotherms at a heating rate of 20°C were broad, but the actual melting point observed visually was over a much narrower range.
Description of key information
The test substance has a melting range of 53 - 58 °C at atmospheric pressure.
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- 53 °C
Additional information
The test substance has a melting range of 53 - 58 °C at atmospheric pressure.
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