Registration Dossier
Registration Dossier
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EC number: 228-491-9 | CAS number: 6281-42-1
Boiling point
Administrative data
Link to relevant study record(s)
- Endpoint:
- boiling point
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2015-11-06 until 2016-05-20
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.2 (Boiling Temperature)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- differential scanning calorimetry
- Key result
- Decomposition:
- yes
- Decomp. temp.:
- ca. 70 °C
- Conclusions:
- The test item decomposes before boiling.
- Executive summary:
The boiling point of the test item was determined according EU Method A.2 and under GLP. No deviation from the guideline was observed during the study.
The exothermic peaks observed on DSC curves correspond to the decomposition of the test item before boiling.
Reference
Test A
Exothermic events:
- Onset T = 142.16°C, heat of decomposition 317.01 J/g
- Onset T = 325.58°C, heat of decomposition 48.86 J/g
Test B
Exothermic events:
- Onset T = 142.17°C, heat of decomposition 202.96 J/g
- Onset T = 315.84°C, heat of decomposition 63.80 J/g
Based on Sponsor information and visual observations, the test item is a solid containing a non-negligible liquid phase. Indeed, at ambient temperature, the test item is super cooled. As a result the endothermic peak observed during the DSC analysis is probably not due to the melting of the test item, but rather to the super cooling of the sample. This conclusion is supported by the observation of a clear liquid phase at 20 to ~ 30°C. As two exothermic events then occur with the first following directly from the endothermic event the test material is believed to decompose before boiling.
Description of key information
The boiling point of the test item was determined according EU Method A.2 and under GLP. No deviation from the guideline was observed during the study.
The exothermic peaks observed on DSC curves correspond to the decomposition of the test item before boiling.
Key value for chemical safety assessment
Additional information
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