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EC number: 309-627-7 | CAS number: 100545-46-8
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:
- weight of evidence
- Study period:
- 2016-09-26
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- study well documented, meets generally accepted scientific principles, acceptable for assessment
- Qualifier:
- no guideline followed
- Principles of method if other than guideline:
- Determination of the melting point by the thermoanalytical technique DSC
- GLP compliance:
- no
- Type of method:
- differential scanning calorimetry
- Key result
- Melting / freezing pt.:
- >= 29.84 - <= 151.08 °C
- Decomposition:
- yes
- Decomp. temp.:
- ca. 220 °C
- Remarks on result:
- other: The endothermic reaction can correspond to a melting or to a relaxation phenomena due to the water evaporation of the sample.
- Conclusions:
- The test item has melting range from 29.84°C to 151.08°C with a peak at 86.98°C or this a relaxation phenomena.
- Executive summary:
A determination of the thermal stability of the test item by DSC (Differential Scanning Calorimetry) was performed with a DSC Mettler TOLEDO DSC 1, using a perforated crucible.
The result shows an endothermic reaction between 29.84°C and 151.08°C, with a peak of -51.37 kJ/kg at 86.98°C.
Then an exothermic phase starts at 220°C, consistent with the beginning of the decomposition of the test item.
The peak corresponds to a melting range or to a relaxation phenomena due to the evaporation of the water.
- Endpoint:
- melting point/freezing point
- Type of information:
- experimental study
- Adequacy of study:
- weight of evidence
- Study period:
- 2016
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- study well documented, meets generally accepted scientific principles, acceptable for assessment
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Version / remarks:
- similar to Kofler hot bar
- Deviations:
- yes
- Remarks:
- : hot bar PROLABO, temperature is homogenous on the hot bar
- Principles of method if other than guideline:
- Technic similar to the Kofler Hot bar.
Apparatus PROLABO: temperature is homegenous at every point of the hot bar - GLP compliance:
- no
- Type of method:
- hot stages
- Remarks:
- similar to Kofler hot bar
- Key result
- Decomposition:
- yes
- Decomp. temp.:
- ca. 250 °C
- Remarks on result:
- other: The test item decomposes before melting
- Conclusions:
- The test item has no melting point and starts decomposing at 250°C
- Executive summary:
Under normal conditions of pressure, the test material starts to decompose around 250°C.
Referenceopen allclose all
Test item: At 250°C, the test item became dark and sticky with release of smell. At 350°C the test item is totally dark, and the test is stopped.
At no time the test item becomes liquid.
Description of key information
2 tests were performed to determine the melting of the test item:
- one hot bar test
- one DSC with an open crucible
The substance has no melting point and starts decomposing at temperature > 220°C.
Key value for chemical safety assessment
Additional information
2 tests were performed to determine the melting of the test item:
- one hot bar test
- one DSC with an open crucible
In the DSC, the laboratory has concluded that the endothermic was either a melting or a relaxation phenomena.
An endothermic peak in a DSC heating curve, performed with a Mettler Toledo apparatus is a melting peak if:
- the sample weight does not decrease significantly over the course of the peak, and
- the sample appears to have visibly melted after the measurement, and
- the surface area of the peak is between about 120 Jg-1 to 170 Jg-1 for non-polyleric organic substances, and
- the half-width of the peak is significantly less than 10 K (i.e. 10°C).
The surface area of the peaks is low (-51.37 kJ/kg), which is < of the 120 kJ/kg cut off value.
No data is provided concerning the half-width of the peaks, but given the very wide peak width, the half-width of the peak is exceeds 10 K
I.e. the endothermic peak does not seems to be melting point.
Furthermore, in the hot bar test, no melting point was observed
Conclusion: The substance has no melting point and starts decomposing at temperature > 220°C.
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