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Physical & Chemical properties

Boiling point

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Reference
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:
reference to same study
Qualifier:
according to
Guideline:
OECD Guideline 103 (Boiling point/boiling range)
Version / remarks:
and EU method A2 (Boiling temperature)
Deviations:
no
GLP compliance:
yes (incl. certificate)
Type of method:
other: thermal analysis
Key result
Boiling pt.:
> 400 °C
Atm. press.:
ca. 1 013 hPa
Decomposition:
no

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.

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.

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.

Description of key information

Cerium dioxide did not boil under the conditions of the test.

Boiling point > 400°C

Key value for chemical safety assessment

Additional information

The existing data only concerns the bulk form. One experimental study, scored as Klimisch 1 (Weissenfeld M., 2006) is available and selected as a key study.