Registration Dossier

Administrative data

relative self-ignition temperature (solids)
Data waiving:
study scientifically not necessary / other information available
Justification for data waiving:
Justification for type of information:

The study is waived in accordance with REACH Annex XI, Section 1: testing does not appear scientifcally necessary based on existing data and evidence from long-term industrial handling.

If the heat developed either by a reaction of the substance with oxygen or by exothermic decomposition is not lost rapidly enough to the surroundings, self-heating leading to self-ignition occurs. Self-ignition therefore occurs when the rate of heat-production exceeds the rate of heat loss.

Long-term industrial experience of manufacturing and handling the substance has not demonstrated any self-ignition properties.

Furthermore, by way of extrapolation, lead metal powder has been tested according to EU-Method A.10, yielding a result of “not flammable”. It can therefore be assumed that lead metal powder is not ignitable or auto-flammable. In consequence, since (i) lead tetroxide (“minium”) represents the most oxidised form of lead and is thus intrinsically less combustible than lead itself, and (ii) no exothermic decomposition (DSC analysis) was reported up to a temperature of 550 °C, it can safely be assumed not to be ignitable or auto-flammable for lead tetroxide.

Data source

Materials and methods

Results and discussion

Applicant's summary and conclusion