Cerium dioxide

Auto flammability

Link to relevant study record(s)

Reference

Endpoint:

relative self-ignition temperature (solids)

Type of information:

experimental study

Adequacy of study:

key study

Study period:

from 10 Jun 2005 to 13 Oct 2005

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Reason / purpose for cross-reference:

reference to same study

Reason / purpose for cross-reference:

reference to same study

Reason / purpose for cross-reference:

reference to same study

Reason / purpose for cross-reference:

reference to same study

Qualifier:

according to guideline

Guideline:

EU Method A.16 (Relative Self-Ignition Temperature for Solids)

Version / remarks:

Cited as Directive 92/69/EEC, A.16

Deviations:

yes

Remarks:

, the maximum oven temperature was 300°C instead of 400°C as required by the guideline. A Grewer test was done in addition, in order to confirm the results up to 500°C.

GLP compliance:

yes

Key result

Relative self-ignition temperature:

> 400 °C

Remarks on result:

no self ignition observed under the test conditions

Pressure not indicated.

Conclusions:

Cerium dioxide has no auto-ignition temperature up to at least 400°C.

Executive summary:

The relative self-ignition temperature of cerium dioxide was assessed according to EU Method A16 under GLP compliance up to 300°C with a plateau. No self-ignition is observed up to 300°C. A Grewer test, performed up to 500°C, was done as a non-GLP compliant complement of the previous test. No exothermic reaction is observed up to 500°C. The test item has no auto-ignition temperature up to at least 400°C.

Description of key information

Auto-Ignition temperature > 400°C (pressure not indicated).

Additional information

One experimental study, scored as Klimisch 1, is available and selected as a key study. It reveals that the bulk form of cerium dioxide has no auto-ignition temperature up to at least 400 °C.