Registration Dossier
Registration Dossier
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EC number: 276-012-7 | CAS number: 71786-55-5
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:
- From September 25th to 29th, 2019
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Version / remarks:
- 1995
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- differential scanning calorimetry
- Remarks:
- and capillary method
- Decomposition:
- yes
- Decomp. temp.:
- > 310 - < 420 °C
- Conclusions:
- No melting point between room temperature and 500 °C. Exothermic decomposition between 310 and 420 °C with an energy release of ca. 60 J/g.
- Executive summary:
Differential scanning calorimetry and capillary method according to OECD guideline 102.
In the DSC assay, an endothermic effect is seen between 50 and 250 °C, followed by an exothermic effect between 310 and 420 °C.
The test item has no melting point up to the decomposition temperature of approx. 310 °C at atmospheric pressure (995.1 hPa – 995.6 hPa).
Reference
The test item showed a broad endothermic effect in the temperature range of approx. 50 – 250 °C. An exothermic effect was detected in the temperature range of approx. 310 – 420 °C with an overall energy of -60 J/g.
To check the results of the DSC measurements, 3 additional measurements with the capillary method were performed in the temperature range of room temperature to 400 °C with a heating rate of 10 K/min. No melting of the test item was observed until the temperature of 320 °C. At a temperature of 340 °C the test item started to decompose.
Combining the results of the DSC-measurement and the capillary method, no melting of the test item could be observed. The endothermic effect in the DSC can be assigned to evaporating components (e.g. water). The test item started to decompose at approx. 310 °C according to the DSC measurement.
| sample weight / mg | onset of effect / °C |
range of effect / °C | weight loss / mg |
| 12.85 | 67.25 | 50 - 250 (endo) 310 - 420 (exo) |
3.56 |
| 12.89 | 73.14 | 50 - 250 (endo) 310 - 420 (exo) |
3.56 |
Description of key information
No melting up to 500 °C; decomposition occurs between 310 and 420 °C.
Key value for chemical safety assessment
Additional information
DSC and capillary method - OECD guideline 102.
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