Registration Dossier
Registration Dossier
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EC number: 235-552-3 | CAS number: 12284-76-3
Vapour pressure
Administrative data
- Endpoint:
- vapour pressure
- Data waiving:
- study scientifically not necessary / other information available
- Justification for data waiving:
- the study does not need to be conducted because the melting point is above 300°C
Cross-reference
- Reason / purpose for cross-reference:
- data waiving: supporting information
Reference
- Endpoint:
- melting point/freezing point
- Type of information:
- experimental study
- Adequacy of study:
- key study
- 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
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- other: Differential scanning calorimetry and metal block (capillary) method
- Melting / freezing pt.:
- > 450 °C
- Atm. press.:
- 101.3 kPa
- Decomposition:
- ambiguous
- Sublimation:
- no
- Conclusions:
- The melting point of the test substance was deemed to be greater than the highest temperature utilised on study (450°C).
The test substance was heated to a maximum of 450 °C in the DSC analysis and 300 °C using a metal block analysis method. No changes indicating that the substance melted were observed (i.e. the melting point is considered to be > 450 °C).
In the metal block analysis, the substance underwent a transient color change from 190 °C (turning yellow/brown from off white), with evidence of drying observed at 206 °C. No presence of the yellow/brown color change was noted from 225 °C up to 300 °C. The cause of the color change and the wide thermal events noted in the DSC thermograms could not be conclusively explained, although these likely relate to changes in non-labile water content present in the test item’s crystal structure. Other possibilities such as decomposition, surface oxidation and rearrangement of the crystal structure itself could not be ruled out.
Data source
Materials and methods
Results and discussion
Applicant's summary and conclusion
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