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EC number: - | 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:
- November 04, 2014 - November 10, 2014
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- thermal analysis
- Decomposition:
- yes
- Decomp. temp.:
- ca. 240 °C
- Executive summary:
The test item had no melting point. The test item decomposed before melting could occur.
Reference
Results:
Melting point / melting range (DSC measurement)
One DSC measurement in aluminium crucibles with a hole showed an exothermal effect in the temperature range of 240 – 265 °C, which was directly followed by an endothermal effect in the temperature range of 265 – 270 °C. The endothermal effect was directly followed with an exothermal effect in the temperature range 270 – 335 °C. The results of the DSC measurements are summarized in Table 2.
Table 2: Melting point (DSC-measurements)
Ident No. |
Test item / mg |
Final test temperature / °C |
Type of effect |
Temperature range / °C |
Onset / °C |
Crucible |
34710 |
5.71 |
400 |
endothermal |
265 – 270 |
267.3 |
Aluminium with a hole |
The crucible was damaged after the measurement and the test item was decomposed. In order to proof the non-existence of a melting point an additional measurement was performed with the capillary method.
Melting point / melting range (capillary tube in a metal block)
One measurement with the capillary method was performed. The filling height of the test item was approximately 5 – 6 mm. The results are summarized in Table 3.
Table 3: Results of the capillary method
No. |
Set point / |
Heating rate / K/min |
End |
Remarks |
1 |
255 |
1 |
275 |
Approx. 256 °C: test item began to decompose |
The DSC and capillary method measurements showed that the test item had no melting point. The test item decomposed first.
Description of key information
The melting point / melting range of the test item was determined according to the European Commission Regulation (EC) No. 440/2008, Method A.1 and according to the OECD test guideline, OECD 102.
Key value for chemical safety assessment
Additional information
The test item had no melting point. The test item decomposed before melting could occur.
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