Registration Dossier
Registration Dossier
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EC number: 616-995-5 | CAS number: 8018-01-7
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 2014-01-22 to 2014-01-31
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- differential scanning calorimetry
- Key result
- Melting / freezing pt.:
- 189 °C
- Decomposition:
- yes
- Decomp. temp.:
- 210 °C
- Sublimation:
- no
- Conclusions:
- The melting point of the test item is 189 °C.
- Executive summary:
An experimental study was conducted according to EU method A.2 to determine the melting point of the test item using differential scanning calorimetry. The test item was heated with a heating rate of 10 °C/min from 25 °C to 425 °C. The endothermic peak at 189 °C is assumed to be the melting point.
Reference
Melting is an endothermic process. The melting point is defined as the extrapolated onset temperature of the first (endothermic) peak. The determinations for melting point were performed in duplicate and collected in the following table:
T |
Determination 1 |
Determination 2 |
Average |
Onset temperature (TO ) |
167.18 °C |
166.16 °C 167.23 °C |
167 °C |
Extrapolated onset Temperature (TC) |
188.79 °C |
188.77 °C 189.58 °C |
189 °C |
Peak temperature (TP) |
195.29 °C |
195.63 °C 195.47 °C |
195 °C |
The onset temperature (TO), extrapolated onset temperature (TC) and peak temperature
(TP) for any reaction(s) have been observed and calculated
The melting point of the test item is 189 °C.
The second change in the heat flow curve shows an endothermic process but no symmetric peak, which means that the test item is decomposed before reaching a boiling point. The decomposition point is defined as the start temperature of the second (endothermic) process. The decomposition point of the test item is 210 °C.
Description of key information
The melting point of the test item is 189 °C.
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- 189 °C
Additional information
An experimental study was conducted according to EU method A.2 to determine the melting point of the test item using differential scanning calorimetry. The test item was heated with a heating rate of 10 °C/min from 25 °C to 425 °C. The endothermic peak at 189 °C is assumed to be the melting point.
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