Registration Dossier
Registration Dossier
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EC number: 215-150-4 | CAS number: 1306-38-3
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:
- from 03 Nov 2005 to 19 Apr 2006
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Reason / purpose for cross-reference:
- reference to same study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 103 (Boiling point/boiling range)
- Version / remarks:
- and EU method A2 (Boiling temperature)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- other: thermal analysis
- Key result
- Boiling pt.:
- > 400 °C
- Atm. press.:
- ca. 1 013 hPa
- Decomposition:
- no
- Conclusions:
- Cerium dioxide does not boil under the conditions of the test.
- Executive summary:
The boiling point of cerium dioxide was assessed using a thermal analysis, according to OECD Guideline 103 under GLP compliance.
A test item amount of 24.06 mg was heated up from 25°C to 400°C at a rate of 20°C/min. The quantities of heat absorbed or released were measured by Differential Scanning Calorimeter and recorded. No endothermic heat effect was observed from which boiling could be deduced. After the experiment, the sample was still a powder, losing about 0.6% of its mass.
To confirm the results of the preliminary test, the thermal analysis was repeated with 19.2 mg of test item in the same temperature range but with the rise adjusted to 10°C/min. No endothermic reaction could be observed. After the experiment, the sample had lost about 0.3% of its mass and the sample was unchanged in appearance.
In conclusion, cerium dioxide does not boil under the conditions of the test.
Reference
Preliminary test: No endothermic heat effect was observed from which boiling could be deduced. After the experiment, the sample was still a powder, losing about 0.6% of its mass.
Main test: No endothermic reaction could be observed. After the experiment, the sample had lost about 0.3% of its mass and the sample was unchanged in appearance.
Description of key information
The bulk form of cerium dioxide did not boil under the conditions of the test.
Boiling point > 400°C
Key value for chemical safety assessment
Additional information
One experimental study, scored as Klimisch 1, is available and selected as a key study, giving a boiling point > 400°C for the bulk form of cerium dioxide.
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