Diiron trioxide

Auto flammability

Link to relevant study record(s)

Reference

Endpoint:

relative self-ignition temperature (solids)

Data waiving:

study scientifically not necessary / other information available

Justification for data waiving:

other:

Principles of method if other than guideline:

expert judgement

GLP compliance:

no

The metal ions are already in their maximum oxidation stages of Fe^3+. Further oxidation is not possible. Therefore, theses substances will not react with oxygen or air. The substances are not flammable

Conclusions:

The metal ions are already in their maximum oxidation stages of Fe3+. Further oxidation is not possible. Therefore, theses substances will not react with oxygen or air. The substances are not flammable

Executive summary:

In accordance with column 1 of REACH Annex IX, information is not required, as the stability of the substance is considered to be not critical. In this compound, the iron ion is already in its maximum oxidation stage of +III. Further oxidation is not possible. Therefore, this substance will not react with oxygen or air, and self-heating cannot occur.

Description of key information

According to Regulation (EC) No 1907/2006, Annex VII, Section 7.12, Column 2, the study does not need to be conducted for solids, if preliminary results exclude self heating of the substance up to 400 °C. For diiron trioxide were no self heating properties reported in handbook data (CRC, HSDB, Römpp, see section 4.2 melting point) up to the melting point which is >400 °C.

Self-ignition is not considered to be of relevance for this substance, since this would require heat to be developed either by reaction of this substance with oxygen or by exothermic decomposition and which is not lost rapidly enough to the surroundings. In this compound, the iron ion is already in its maximum oxidation stage of +III.

It is intrinsically not combustible and can safely be assumed not to be ignitable under the conditions given in EU-Method A.16.