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Physical & Chemical properties

Oxidising properties

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Description of key information

Read-across from lead tetroxide:

The read-across approach used falls under RAAF Scenario 2: analogue approach for which the hypothesis is based on different compounds with the same type of effect.

The absence of effects obtained in a study conducted with the source substance, lead tetroxide, is used to predict the same absence of effects that would be observed in a study with the target substance if it were to be conducted.

Key value for chemical safety assessment

Oxidising properties:
non oxidising

Additional information

On the basis of read-across from lead tetroxide, together with long-term industrial handling experience, testing of lead dichloride is not required, in accordance with Regulation (EC) No 1907/2006, Annex XI, Section 1.5: read-across of results and conclusion on classification for lead tetroxide to lead dichloride is justifiable, under RAAF scenario 2.

Justification for classification or non-classification

Lead dichloride does not require classification for oxidising properties based on a comparison of the intrinsic chemistry and oxidation states with a tested substance, orange lead, which was concluded "non oxidising", and considering evidence from long-term industrial handling experience.

In the sense of classification for supply and transport an oxidising solid is a solid which, while in itself not necessarily combustible, may - generally by yielding oxygen - cause or contribute to the combustion of other material. From a chemical perspective, they are substances which usually react by removing electrons from other substances. An oxidising agent is therefore normally found in one of its higher possible oxidation states; it will gain electrons and thus itself be reduced.

Testing according to EU Method A.17 was carried out on lead tetroxide (orange lead; Pb3O4) in 2005. From the test results it is concluded that orange lead does not exhibit oxidising properties.

In the test substance, the lead is present in two oxidation states +II and +IV. However, the lead in lead dichloride is only in the oxidation state +II and is thus intrinsically less oxidising.

Therefore it is scientifically implausible that lead chloride would exhibit oxidising properties sufficient for classification, considering the comparable compound Pb3O4 does not and is not classified as an oxidising solid on the basis of A.17 testing.

Furthermore, long-term industrial use of the substance demonstrates a lack of oxidising properties, and it is not classified for oxidising properties according to UN transport regulations.

Testing of lead dichloride is not required, in accordance with Regulation (EC) No 1907/2006, Annex XI, Section 1.5: read-across of results and conclusion on classification for lead tetroxide to lead dichloride is justifiable, under RAAF scenario 2.