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EC number: 239-473-5 | CAS number: 15454-75-8
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 June 2016 to 06 June 2016
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- comparable to 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:
- capillary method
- Specific details on test material used for the study:
- STABILITY AND STORAGE CONDITIONS OF TEST MATERIAL
- Storage condition of test material: Controlled room temperature (15 to 25 °C, below 70 % RH) protected from light. - Decomposition:
- yes
- Remarks:
- The test material browned at 252 °C and blackened at 253 °C.
- Remarks on result:
- not determinable
- Conclusions:
- Under the conditions of the study no exact melting point of the test material could be determined.
- Executive summary:
The melting point of the test material with investigated in accordance with the standardised guidelines OECD 102 and EU Method A.1 under GLP conditions.
The melting behaviour of the test material was estimated in a preliminary test with three replicate samples. Samples of the test material in a glass tube were heated from 30 °C with a rate of 10 °C/min until 400 °C. During the preliminary test melting point was observed around 286.4 °C.
For the main test the capillaries were inserted to the heating chamber at 280 °C, the test material melted immediately. This was the same situation until 150 °C. Therefore a measurement from 150 °C up to 286 °C with 10 °C/min rate was run and considered as second preliminary test.
A heating in the range of 150 to 290 °C was carried out, for this test the test material was powdered if it may be able to exclude the different behaviour of the test material. Even these powdered samples had different behaviour after the insertion the 3 parallel capillaries. It can be stated that a part of the test material disappeared from one capillary (from around 165 °C). The test material in the other two capillaries browned (approximately at 252 °C) and blackened (at around 253 °C).
Under the conditions of the study no exact melting point of the test material could be determined.
Reference
During the preliminary test melting point was observed around 286.4 °C.
For the main test the capillaries were inserted to the heating chamber at 280 °C, the test material melted immediately. This was the same situation until 150 °C. Therefore a measurement from 150 °C up to 286 °C with 10 °C/min rate was run and considered as second preliminary test.
It can be stated that a part of the test material disappeared from one capillary (from around 165 °C). The test item in the other two capillaries browned (approximately at 252 °C) and blackened (at around 253 °C).
No exact melting point of the test material could be determined.
Description of key information
Under the conditions of the study no exact melting point of the test material could be determined.
Key value for chemical safety assessment
Additional information
The melting point of the test material with 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).
The melting behaviour of the test material was estimated in a preliminary test with three replicate samples. Samples of the test material in a glass tube were heated from 30 °C with a rate of 10 °C/min until 400 °C. During the preliminary test melting point was observed around 286.4 °C.
For the main test the capillaries were inserted to the heating chamber at 280 °C, the test material melted immediately. This was the same situation until 150 °C. Therefore a measurement from 150 °C up to 286 °C with 10 °C/min rate was run and considered as second preliminary test.
A heating in the range of 150 to 290 °C was carried out, for this test the test material was powdered if it may be able to exclude the different behaviour of the test material. Even these powdered samples had different behaviour after the insertion the 3 parallel capillaries. It can be stated that a part of the test material disappeared from one capillary (from around 165 °C). The test material in the other two capillaries browned (approximately at 252 °C) and blackened (at around 253 °C).
Under the conditions of the study no exact melting point of the test material could be determined.
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