Registration Dossier

Physical & Chemical properties


Currently viewing:

Administrative data

Link to relevant study record(s)

Description of key information

Waiving for pyrophoricity, flammability solids and flammability in contact with water.

Key value for chemical safety assessment

not classified

Additional information

Justification for classification or non-classification

No classification required.

Lead tetroxide does not exhibit pyrophoric properties. In several decades of production, marketing and downstream use, none of the lead compounds have ever been reported to exhibit such properties.

Lead tetroxide (“minium”) does not contain groups that might lead to a reaction with water or damp air, leading to the development of dangerous amounts of gas or gases which may be highly flammable. Furthermore, experience in practical handling of the substance shows that it does not react with water, and recent experimental testing for water solubility has not reported formation of any gas or gases whatsoever in any of the lead compounds.

Testing of flammability was recently conducted for lead metal powder, yielding a result of “not flammable”. Thus, since lead tetroxide (“minium”) represents the most oxidised form of lead and is thus intrinsically less combustible than lead itself, a test conducted according to the same method can not reasonably be expected to yield any other result.