Zirconium oxide, erbium and yttrium doped

Flammability

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

substances / mixtures which in contact with water emit flammable gases

Data waiving:

study scientifically not necessary / other information available

Justification for data waiving:

the study does not need to be conducted because the experience in production or handling shows that the substance does not react with water, e.g. the substance is manufactured with water or washed with water

Justification for type of information:

JUSTIFICATION FOR DATA WAIVING
In accordance with section 1.5 of REACH Annex XI, the study does not need to be performed as based on chemical structure water reactivity is not to be expected.

Reference 2

Endpoint:

pyrophoric solids

Data waiving:

study scientifically not necessary / other information available

Justification for data waiving:

the study does not need to be conducted because the substance is known to be stable in contact with air at room temperature for prolonged periods of time (days) and hence, the classification procedure does not need to be applied

Justification for type of information:

JUSTIFICATION FOR DATA WAIVING
In accordance with section 1.5 of REACH Annex XI, the study does not need to be performed as based on the chemical structure pyrophoric properties are not to be expected. In addition, in the daily use and handling of the substance, during which continuous exposure to air can occur, no spontaneous ignition is observed.

Reference 3

Endpoint:

flammable solids

Data waiving:

study scientifically not necessary / other information available

Justification for data waiving:

other:

Justification for type of information:

JUSTIFICATION FOR DATA WAIVING
In accordance with REACH Annex XI (Section 1), testing does not appear scientifically necessary. Use of existing information on the constituent metal oxides is sufficient to conclude on the flammability of the substance. Inorganic oxides in which the inorganic element is in its highest oxidation state are incapable of further reaction with oxygen and can thus be designated as non-flammable. The oxidation state of zirconium, yttrium and erbium in zirconium oxide, erbium and yttrium doped are in the highest possible oxidation states (4+ for zirconium and 3+ for yttrium and erbium) and thus zirconium oxide, erbium and yttrium doped can be considered as non-flammable.

Description of key information

Flammability (Solids)

In accordance with REACH Annex XI (Section 1), testing does not appear scientifically necessary. Use of existing information on the constituent metal oxides is sufficient to conclude on the flammability of the substance. Inorganic oxides in which the inorganic element is in its highest oxidation state are incapable of further reaction with oxygen and can thus be designated as non-flammable. The oxidation state of zirconium, yttrium and erbium in zirconium oxide, erbium and yttrium doped are in the highest possible oxidation states (4+ for zirconium and 3+ for yttrium and erbium) and thus zirconium oxide, erbium and yttrium doped can be considered as non-flammable.

Flammability (Contact with Water)

In accordance with section 1.5 of REACH Annex XI, the study does not need to be performed as based on chemical structure water reactivity is not to be expected.

Flammability (Pyrophoric Properties)

In accordance with section 1.5 of REACH Annex XI, the study does not need to be performed as based on the chemical structure pyrophoric properties are not to be expected. In addition, in the daily use and handling of the substance, during which continuous exposure to air can occur, no spontaneous ignition is observed.

Key value for chemical safety assessment

Flammability:

not classified

Justification for classification or non-classification

In accordance with the criteria for classification as defined in Annex I, Regulation (EC) No. 1272/2008, the substance does not require classification for flammability.