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EC number: 947-375-5 | 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:
- 24 Oct. 2017 - 06 December 2017
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- guideline study with acceptable restrictions
- 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
- Principles of method if other than guideline:
- Not applicable
- GLP compliance:
- yes (incl. QA statement)
- Remarks:
- inspected on 13 and 14 October 2014 / signed on 08 April 2015
- Type of method:
- differential scanning calorimetry
- Key result
- Melting / freezing pt.:
- 29.06 °C
- Atm. press.:
- 100 258 Pa
- Executive summary:
The melting point of the test substance was determined under GLP according to OECD 102 / EU A1 guideline.
It was evaluated by the DSC method with the Onset function and determined under these circumstances as the endothermic event with 29.06 ± 0.08 °C (302.21 ± 0.08 K).
Reference
Results of Pre Test
The test item began to melt at 66°C. The temperature at which the test item was completely melted to a sticky liquid was hardly visible because the test item is very dark and high viscous.
After cooling down the test item was visual unchanged.
DSC measurements:
In the DSC runs one endothermic event was detected. Referring to the observations of the pre-test this event can be indicated as melting point.
First determination
Temperature[°C] |
Energy |
|
MeltingPoint |
29.0 (Onset) |
34.02[J/g] |
Second determination
Temperature[°C] |
Energy |
|
MeltingPoint |
29.12 (Onset) |
34.68[J/g] |
Observations crucibles
Mass test item |
Mass crucible (before measurement): |
Mass crucible (after measurement): |
Observations |
|
First Measurement |
2.30 mg |
48.62 mg |
46.88 mg (weight loss = 75.7%) |
The crucible was visual unchanged and opened the test item was carbonized. |
Second Measurement
|
4.62 mg |
69.71 mg |
66.12 mg (weight loss = 77.7%) |
The test item had left the crucible through the perforation. |
The ambient pressure was recorded with 100258 Pa.
Mean of two determinations = 29.06°C (302.21K)
Standard deviation = 0.08°C (0.08K)
As the deviation between the two independant determinations was below 0.5 K the result can be considered valid.
Description of key information
The melting point evaluated by the DSC method with the Onset function was determined under these circumstances as the endothermic event with:
29.06 ± 0.08 °C (302.21 ± 0.08 K)
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- 29.06 °C
Additional information
A reliable experimental study, conducted in accordance with conditions recommended in OECD guideline and under GLP, is available. It is considered as a key study. The result is retained as key data.
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