Zirconium oxide (ZrO2), erbium-doped

Flammability

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

self-heating substances / mixtures

Data waiving:

study scientifically not necessary / other information available

Justification for data waiving:

other:

Reference 2

Endpoint:

substances / mixtures which in contact with water emit flammable gases

Data waiving:

study scientifically not necessary / other information available

Justification for data waiving:

other:

Reference 3

Endpoint:

pyrophoric solids

Data waiving:

study scientifically not necessary / other information available

Justification for data waiving:

other:

Reference 4

Endpoint:

flammable solids

Data waiving:

study scientifically not necessary / other information available

Justification for data waiving:

other:

Description of key information

Based on the chemical structure of erbium zirconium oxide and experience in daily use it can be concluded that erbium zirconium oxide is neither a flammable or pyrophoric solid, nor a solid which emits flammable gases in contact with water, nor a solid which is sensitive to self-heating.

Key value for chemical safety assessment

Flammability:

not classified

Additional information

Testing on erbium zirconium oxide is considered not to be required as based on the chemical structure and experience with daily use and handling it can be concluded that erbium zirconium oxide is neither a flammable or pyrophoric solid, nor a solid which emits flammable gases in contact with water, nor a solid which is sensitive to self-heating.

Justification for classification or non-classification

Pyrophoricity

In the daily use and handling of erbium zirconium oxide during which continuous exposure to air can occur, no spontaneous ignition is observed. The absence of structural alerts furthermore confirms that it is highly unlikely that erbium zirconium oxide has pyrophoric properties.

Flammability in contact with water

Under conditions where erbium zirconium oxide is in contact with water no ignition and/or liberation of flammable gases is observed. The absence of structural alerts furthermore confirms that it is highly unlikely that erbium zirconium oxide is flammable in contact with water.

Flammability

Inorganic oxides in which the inorganic element is in its highest possible oxidation state are incapable of further reaction with oxygen and can thus be designated as non-flammable. The oxidation state of erbium and zirconium in erbium zirconium oxide is in its highest possible state (4+ for zirconium and 3+ for erbium) and thus erbium zirconium oxide can be considered as non-flammable.

Self-heating

Inorganic oxides in which the inorganic element is in its highest possible oxidation state are incapable of further reaction with oxygen and can thus be designated as non-flammable. The oxidation state of zirconium and erbium in erbium zirconium oxide is in its highest possible state (4+ for zirconium and 3+ for erbium) and thus erbium zirconium oxide can be considered as non-flammable and not sensitive to self-heating.